<Tag color={value} onMouseDown={onPreventMouseDown} closable={closable} onClose={onClose} style={{ marginInlineEnd: 4 }} > {label} </Tag> 我想让他的color为随��?

时间: 2025-08-04 16:04:26 浏览: 46
<think>我们正在讨论如何为一个React的Tag组件设置color属性为随机颜色。根据引用[1],我们可以创建一个样式对象,但这里我们需要动态生成随机颜色。我们可以考虑在组件内部生成随机颜色的逻辑,然后将这个随机颜色应用到样式上。思路��?1.在组件的函数内部(如果使用函数组件)或类组件的render方法中,生成一个随机颜色��?2.将这个随机颜色作为样式属性(例如:color或backgroundColor)的值。然而,需要注意:引用[2]提到了性能优化,即如果组件不需要根据外部状态变化重新渲染,可以使用shouldComponentUpdate返回false。但这里我们每次都需要随机颜色,所以每次渲染都应该重新生成(除非有特殊要求)。具体步骤(以函数组件为例)��?1.在函数组件内部,我们可以使用一个状态来存储随机颜色,但这样每次组件重新渲染都会重新生成,或者我们可以只在组件挂载时生成一次(根据需要)��?2.另一种方法是直接在JSX中生成随机颜色,但是要注意:如果组件因为其他原因重新渲染,颜色也会重新生成(会变化)。所以需要根据需求选择。假设我们希望每次渲染都使用一个新的随机颜色(例如,每次父组件重新渲染导致Tag重新渲染时颜色变化),我们可以直接计算。但是,如果我们只希望在组件创建时设置一次随机颜色,之后不再变化,那么我们应该使用useState和useEffect来在挂载时设置一次。情况一:每次渲染都变化在样式对象中直接使用随机颜色,例如:conststyle={backgroundColor:`rgb(${Math.floor(Math.random()*256)},${Math.floor(Math.random()*256)},${Math.floor(Math.random()*256)})`};情况二:只在组件创建时设置一次我们可以使用useState和useEffect:const[color,setColor]=useState(null);useEffect(()=>{setColor(`rgb(${Math.floor(Math.random()*256)},${Math.floor(Math.random()*256)},${Math.floor(Math.random()*256)})`);},[]);然后使用color作为样式。根据引用[3],我们是在实现一个Tag组件,因此我们还需要考虑组件的属性(props)定义。比如,我们可能允许外部传入颜色,但如果没有传入,则使用随机颜色。因此,我们可以这样设计��?1.定义一个prop:color,如果提供了,就使用提供的颜色,否则使用随机颜色(根据上述两种策略之一)��?2.我们可以添加一个prop来控制随机颜色是只生成一次还是每次重新渲染都重新生成。但为了简化,我们选择一种策略。这里我们以情况二(只生成一次)为例,并且考虑外部传入的颜色覆盖:具体代码示例(函数组件)��?*/importReact,{useState,useEffect}from'react';functionTag({text,color}){//如果外部传入了color,我们就使用传入的颜色,否则使用内部生成的随机颜色const[randomColor,setRandomColor]=useState(null);useEffect(()=>{//当没有传入color时,才需要生成随机颜色if(!color){constnewColor=`rgb(${Math.floor(Math.random()*256)},${Math.floor(Math.random()*256)},${Math.floor(Math.random()*256)})`;setRandomColor(newColor);}},[color]);//注意:依赖项中加入了color,如果传入的color从有变到无,我们才会重新生成随机颜色?但实际上我们希望只在挂载时生成一次。所以这里可以改为空依赖([])来保证只生成一次��?//确定最终颜色:如果有传入的color,使用color,否则使用randomColorconsttagStyle={backgroundColor:color||randomColor,//其他样式...};return<divstyle={tagStyle}>{text}</div>;}/*但是上面的代码有一个问题:当没有传入color时,我们使用randomColor,但是randomColor一开始是null(在第一次渲染后才会设置),所以在第一次渲染时,backgroundColor为null,即相当于没有设置,直到useEffect执行后重新渲染才会设置。这样会有样式闪烁(先无背景色,然后有背景色)。改进:我们可以将初始的randomColor设置为一个默认颜色(比如白色)或者直接在函数组件内部计算一个初始值(但是注意,在服务端渲染时,如果每次计算不一致会导致服务端和客户端渲染不一致,这里仅考虑客户端)。另一种方法:我们可以在初始渲染时就计算随机颜色,不使用useEffect,而使用useState的初始化函数。这样初始状态就会是随机颜色。修改:将useState的初始化改为一个函数,该函数返回一个随机颜色(注意:这里不能直接调用Math.random(),因为每次渲染都会执行,所以我们需要一个函数作为初始值,这样React只会在初始化组件时调用一次)[^react文档:惰性初始state]。修改后的代码:functionTag({text,color}){//如果没有传入color,我们在初始化时生成一个随机颜色const[randomColor]=useState(()=>{if(!color){return`rgb(${Math.floor(Math.random()*256)},${Math.floor(Math.random()*256)},${Math.floor(Math.random()*256)})`;}returnnull;//传入color时,我们不需要随机颜色,所以保存null即可(但是我们并不会使用这个null,因为下面直接使用color,所以这里也可以不返回)});consttagStyle={backgroundColor:color||randomColor,//其他样式,比如内边距、字体颜色等display:'inline-block',padding:'4px8px',borderRadius:'4px',color:'white',//注意:如果背景颜色很浅,白色字体可能看不清,但是这里我们随机颜色,无法控制,所以暂时这样。};return<divstyle={tagStyle}>{text}</div>;}这样,如果没有传入color,我们在初始状态时就会生成一个随机颜色(只生成一次)。如果传入了color,那么我们就忽略randomColor(此时randomColor是null,但是color有值,所以backgroundColor为color值)。注意:如果父组件重新渲染导致Tag重新渲染,且color属性发生了变化(从有到无),那么我们的randomColor还是当初第一次生成的(不会重新生成),因为useState的初始值只在第一次渲染时使用。所以,如果你希望当传入的color变为无效时重新生成随机颜色,那么需要使用useEffect来监听color的变化,并更新randomColor。但是根据我们的设计,color属性应该是稳定的(或者我们不希望颜色变化),所以上述方法可以满足要求。如果需求是:当color不存在时,每次重新渲染都要重新生成随机颜色,那么就不适合用state来存储,而是直接在每次渲染时计算:functionTag({text,color}){letbackgroundColor=color;if(!color){backgroundColor=`rgb(${Math.floor(Math.random()*256)},${Math.floor(Math.random()*256)},${Math.floor(Math.random()*256)})`;}consttagStyle={backgroundColor,//...其他样式};return<divstyle={tagStyle}>{text}</div>;}这样,当没有传入color时,每次渲染都会生成一个新的随机颜色。总结:根据具体需求选择方案。另外,引用[3]提到了PropTypes,我们可以给组件添加PropTypes检查:importPropTypesfrom'prop-types';Tag.propTypes={text:PropTypes.string.isRequired,color:PropTypes.string,};这样,当传入的color不是字符串时会警告。根据上述分析,我们提供了两种方案:方案1:只在首次渲染时生成一次随机颜色(使用useState的初始化函数)方��?2:每次渲染都重新生成随机颜色(直接计算)请根据实际需求选择。注意:如果使用方案2,且Tag组件的父组件频繁重新渲染,会导致Tag组件的颜色频繁变化,这可能不是想要的。所以一般情况下,我们可能希望颜色在组件的生命周期内保持不变(方��?1)。因此,我们更推荐方��?1。最终代码(方案1,使用惰性初始state):*/</think> 要在React的Tag组件中实现color属性为随机颜色,可以通过以下步骤实现��? ### 实现随机颜色的Tag组件 ```jsx import React from 'react'; // 生成随机颜色函数 const getRandomColor = () => { const randomR = Math.floor(Math.random() * 256); const randomG = Math.floor(Math.random() * 256); const randomB = Math.floor(Math.random() * 256); return `rgb(${randomR}, ${randomG}, ${randomB})`; }; // Tag组件实现 const Tag = ({ label }) => { const color = getRandomColor(); // 生成随机颜色 const tagStyle = { backgroundColor: color, padding: '4px 8px', borderRadius: '4px', color: '#fff', // 白色文字 display: 'inline-block', margin: '4px' }; return <span style={tagStyle}>{label}</span>; }; export default Tag; ``` ### 使用示例 ```jsx import Tag from './Tag'; // 在父组件中使��? const App = () => { const tags = ['前端', 'React', 'JavaScript', 'CSS']; return ( <div> {tags.map((tag, index) => ( <Tag key={index} label={tag} /> ))} </div> ); }; ``` ### 关键实现说明��? 1. **随机颜色生成**��? ```jsx const getRandomColor = () => { const randomR = Math.floor(Math.random() * 256); const randomG = Math.floor(Math.random() * 256); const randomB = Math.floor(Math.random() * 256); return `rgb(${randomR}, ${randomG}, ${randomB})`; }; ``` - 使用$rgb$模式生成颜色��? - 每个颜色通道随机生成0-255的整数��? 2. **样式应用**��? ```jsx const tagStyle = { backgroundColor: color, // 应用随机颜色 // ...其他样式 }; ``` - 通过内联样式对象动态设置背景色 3. **组件设计**��? - 每次渲染都会生成新颜��? - 通过`label`属性传递标签文��? - 符合组件化设计原则(独立样式逻辑)[^3] ### 性能优化选项 如果希望颜色仅在组件挂载时生成一次: ```jsx const Tag = ({ label }) => { const [color] = useState(getRandomColor); // 仅初始化时生��? const tagStyle = { backgroundColor: color, // ... }; return <span style={tagStyle}>{label}</span>; }; ```
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// getParentIds(node) { // const ids = [] // let parent = node.parent // while (parent && parent.level !== 0) { // ids.unshift(parent.data.id) // parent = parent.parent // } // return ids.join(',') // } } }; </script> <style scoped lang="less"> .business-architecture-container { height: 100%; display: flex; padding: 5px; // .business-architecture-container { // display: flex; background: #fff; // height: 100%; .y-resize { width: 10px; height: 100%; // background: #ecedee; background: #fff; cursor: w-resize; } .leftMenu { width: 15%; height: 100%; overflow-y: auto; // background-size: cover; // border: #ecedee 1px solid; .left-title { color: #353535; padding: 2px 5px 5px; } .left-search { padding: 5px; } .blue-text { color: #409EFF; } /deep/.el-tree-node__content { height: 35px; } .node-label { margin-right: 20px; border-radius: 3px; padding: 1px 5px; font-size: 14px; } /* 层级标识 */ .level-1 .node-label { /* font-weight: bold; */ color: #d42a38; border: 1px solid #ffc9c6; background: #fff1f0; } .level-2 .node-label { /* padding-left: 10px; */ color: #e1ab4a; border: 1px solid #ffe99f; background: #fffbe6; } .level-3 .node-label { /* padding-left: 20px; */ color: #84b713; border: 1px solid #ecff97; background: #fcffe6; } } .content-box { flex: 1; height: 100%; border-radius: 4px; overflow-y: auto; padding: 10px 15px 0 0; .breadcrumb { padding: 5px; margin-bottom: 10px; // font-size: 16px; color: #606266; } // .breadcrumb span { // color: #409EFF; // } } .returnBack { width: 100px; color: #66b1ff; cursor: pointer; } } </style> 优化以上代码 实现 : 将两棵树合并成一棵树,实现现有两棵树的效��? 或者实现两棵树无痕切换

using UnityEngine; using UnityEngine.UI; using System.Collections; /// /// 书籍交互控制脚本 /// 功能:实现鼠标点击book对象后,UI图片bookbg平滑过渡到openbg,并使book对象消失 /// /// <usage> /// 使用方法��? /// 1. 将此脚本附加到场景中名为"book"的GameObject��? /// 2. 在Inspector面板中分配以下引用: /// - bookbgImage: 拖入UI中的bookbg图片对象 /// - openbgImage: 拖入UI中的openbg图片对象 /// - bookObject: 拖入场景中的book GameObject(通常是附加此脚本的对象) /// 3. 确保book对象具有Collider2D组件(如BoxCollider2D)并勾��?"Is Trigger" /// 4. 可调整transitionTime参数设置过渡动画时长(默认为1秒) /// </usage> public class BookInteraction : MonoBehaviour { [Tooltip("UI中的bookbg图片组件")] public Image bookbgImage; [Tooltip("UI中的openbg图片组件")] public Image openbgImage; [Tooltip("场景中的book游戏对象")] public GameObject bookObject; [Tooltip("图片过渡动画时长(秒��?")] public float transitionTime = 1.0f; /// /// 初始化设置,确保图片初始状态正��? /// private void Start() { // 检查并设置bookbg初始透明度为1(可见) if (bookbgImage != null) { Color tempColor = bookbgImage.color; tempColor.a = 1f; bookbgImage.color = tempColor; } else { Debug.LogError("BookInteraction: bookbgImage未赋值,请在Inspector中设��?"); } // 检查并设置openbg初始透明度为0(透明��? if (openbgImage != null) { Color tempColor = openbgImage.color; tempColor.a = 0f; openbgImage.color = tempColor; } else { Debug.LogError("BookInteraction: openbgImage未赋值,请在Inspector中设��?"); } // 检查bookObject是否赋��? if (bookObject == null) { Debug.LogError("BookInteraction: bookObject未赋值,请在Inspector中设��?"); } // 检查碰撞体组件 Collider2D collider = GetComponent<Collider2D>(); if (collider == null || !collider.isTrigger) { Debug.LogWarning("BookInteraction: 对象缺少Collider2D组件或未勾选Is Trigger,点击事件可能无法触��?"); } } /// /// 鼠标点击事件检��? /// private void OnMouseDown() { // 检查是否所有必要引用都已设��? if (bookbgImage != null && openbgImage != null && bookObject != null) { StartCoroutine(TransitionBackground()); } else { Debug.LogError("BookInteraction: 缺少必要引用,无法执行过渡动��?"); } } /// /// 协程:平滑过渡背景图片并隐藏book对象 /// private IEnumerator TransitionBackground() { float elapsedTime = 0f; Color bookbgColor = bookbgImage.color; Color openbgColor = openbgImage.color; // 保存初始透明��? float startBookbgAlpha = bookbgColor.a; float startOpenbgAlpha = openbgColor.a; while (elapsedTime < transitionTime) { // 计算过渡进度��?0��?1之间��? float t = elapsedTime / transitionTime; // 使用Mathf.Lerp进行线性插值计算透明��? bookbgColor.a = Mathf.Lerp(startBookbgAlpha, 0f, t); openbgColor.a = Mathf.Lerp(startOpenbgAlpha, 1f, t); // 更新图片透明��? bookbgImage.color = bookbgColor; openbgImage.color = openbgColor; // 累加时间并等待一��? elapsedTime += Time.deltaTime; yield return null; } // 确保最终状态正��? bookbgColor.a = 0f; openbgColor.a = 1f; bookbgImage.color = bookbgColor; openbgImage.color = openbgColor; bookObject.SetActive(false); } } 我要实现不仅要图片顺利转换,而且图片一转换,book立刻消失的功��?

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using ESRI.ArcGIS.Carto; using ESRI.ArcGIS.Controls; using ESRI.ArcGIS.esriSystem; using ESRI.ArcGIS.Geometry; using ESRI.ArcGIS.Geodatabase; using ESRI.ArcGIS.Display; namespace WaterPipelineGIS2 { public partial class Form1 : Form { private IFeatureLayer _selectedFeatureLayer; private System.Drawing.Point _lastRightClickPosition; private enum SelectionMode { None, Rectangle, Circle, Polygon, Polyline } private SelectionMode currentMode = SelectionMode.None; private enum MeasureMode { None, Area, Length, Point } private MeasureMode currentMeasureMode = MeasureMode.None; private IGeometry tempGeometry; private IPointCollection pointCollection; private Label lblMeasureResult; private IGraphicsContainer _spatialSelectionGraphics; // 空间选择图形容器 private IGraphicsContainer _attributeHighlightGraphics; // 属性表高亮图形容器 public Form1() { InitializeComponent(); axMapControl1.OnMouseMove += new IMapControlEvents2_Ax_OnMouseMoveEventHandler(axMapControl1_OnMouseMove); } private void axMapControl1_OnMouseMove(object sender, IMapControlEvents2_OnMouseMoveEvent e) { // 获取地图坐标 double mapX = e.mapX; double mapY = e.mapY; // 格式化坐标显示(保留3位小数) lblCoordinate.Text = string.Format("X: {0:F3} Y: {1:F3}", mapX, mapY); // 立即刷新状态栏 statusStrip1.Refresh(); } private void toolStripMenuItem2_Click(object sender, EventArgs e) { using (var rotateForm = new RotateForm()) { if (rotateForm.ShowDialog() == DialogResult.OK) { try { axMapControl1.Rotation = rotateForm.RotationAngle; axMapControl1.ActiveView.Refresh(); // 可选:更新状态栏 lblCoordinate.Text += " 旋转角度:{rotateForm.RotationAngle}°"; } catch (Exception ex) { MessageBox.Show("旋转失败:{ex.Message}"); } } } } private void axTOCControl1_OnMouseDown(object sender, ITOCControlEvents_OnMouseDownEvent e) { if (e.button == 2) // 右键 { // 保存点击位置(控件坐标系��? _lastRightClickPosition = new System.Drawing.Point(e.x, e.y); ITOCControl2 tocControl = (ITOCControl2)axTOCControl1.Object; // 修改��?1:声明为接口类型并初始化为null IBasicMap basicMap = null; ILayer layer = null; // 修改��?2:使用Type.Missing代替new object() object other = Type.Missing; object index = Type.Missing; esriTOCControlItem itemType = esriTOCControlItem.esriTOCControlItemNone; // 修改��?3:正确传递ref参数 tocControl.HitTest(e.x, e.y, ref itemType, ref basicMap, ref layer, ref other, ref index); if (itemType == esriTOCControlItem.esriTOCControlItemLayer && layer != null) { contextMenuStripTOC.Show(axTOCControl1, e.x, e.y); } } } // 修改后(使用 MouseEventArgs��? private void openAttributeTableToolStripMenuItem_Click(object sender, EventArgs e) { ITOCControl2 tocControl = (ITOCControl2)axTOCControl1.Object; IBasicMap basicMap = null; ILayer layer = null; object other = Type.Missing; object index = Type.Missing; esriTOCControlItem itemType = esriTOCControlItem.esriTOCControlItemNone; // 获取当前鼠标位置(屏幕坐标系��? System.Drawing.Point screenPos = contextMenuStripTOC.PointToClient(Control.MousePosition); // 转换为控件坐标系 System.Drawing.Point controlPos = axTOCControl1.PointToClient(Control.MousePosition); tocControl.HitTest( controlPos.X, controlPos.Y, ref itemType, ref basicMap, ref layer, ref other, ref index ); IFeatureLayer featureLayer = layer as IFeatureLayer; if (featureLayer != null) { _selectedFeatureLayer = featureLayer; AttributeTableForm attrForm = new AttributeTableForm( _selectedFeatureLayer, this // 传递主窗体引用 ); attrForm.Show(); } } private void SetSelectionSymbol() { // 使用接口创建符号 ISimpleFillSymbol fillSymbol = new SimpleFillSymbol() as ISimpleFillSymbol; fillSymbol.Color = GetRgbColor(255, 0, 0); fillSymbol.Style = esriSimpleFillStyle.esriSFSSolid; ISimpleLineSymbol lineSymbol = new SimpleLineSymbol() as ISimpleLineSymbol; lineSymbol.Color = GetRgbColor(255, 255, 0); lineSymbol.Width = 2; fillSymbol.Outline = lineSymbol; // 设置渲染��? if (_selectedFeatureLayer != null) { IGeoFeatureLayer geoLayer = (IGeoFeatureLayer)_selectedFeatureLayer; ISimpleRenderer renderer = new SimpleRenderer() as ISimpleRenderer; renderer.Symbol = (ISymbol)fillSymbol; geoLayer.Renderer = (IFeatureRenderer)renderer; axMapControl1.ActiveView.Refresh(); } } private IRgbColor GetRgbColor(int r, int g, int b) { IRgbColor color = new RgbColor() as IRgbColor; // 正确方式 color.Red = r; color.Green = g; color.Blue = b; return color; } public void ActivateFeatureLayer(IFeatureLayer featureLayer) { if (featureLayer == null) return; // 1. 设置当前活动图层 _selectedFeatureLayer = featureLayer; // 2. 刷新地图显示(可选) axMapControl1.ActiveView.Refresh(); // 3. 更新TOC控件的选中状态(可选) axTOCControl1.Update(); } // 修改 HighlightAndZoomToFeature 方法实现 public void HighlightAndZoomToFeature(IFeatureLayer featureLayer, int oid) { try { if (featureLayer == null || featureLayer.FeatureClass == null) { MessageBox.Show("图层或要素类无效��?"); return; } // 获取要素并检查有效��? IFeature feature = featureLayer.FeatureClass.GetFeature(oid); if (feature == null || feature.Shape == null) { MessageBox.Show("要素 OID {oid} 不存在或无几何!"); return; } IGeometry geometry = feature.Shape; IEnvelope envelope = geometry.Envelope; // 确保包络线有��? if (envelope.IsEmpty || envelope.Width == 0 || envelope.Height == 0) { envelope.Expand(10, 10, true); // 手动扩大点要素范��? } else { envelope.Expand(1.5, 1.5, true); } // 缩放到要素范��? axMapControl1.Extent = envelope; axMapControl1.ActiveView.ScreenDisplay.UpdateWindow(); // 高亮几何 HighlightGeometry(geometry); } catch (Exception ex) { MessageBox.Show("高亮要素失败: {ex.Message}"); } } public object _featureLayer { get; set; } // 矩形选择 private void btnRectSelect_Click(object sender, EventArgs e) { currentMode = SelectionMode.Rectangle; axMapControl1.CurrentTool = null; } // 圆形选择 private void btnCircleSelect_Click(object sender, EventArgs e) { currentMode = SelectionMode.Circle; axMapControl1.CurrentTool = null; } // 多边形选择 private void btnPolygonSelect_Click(object sender, EventArgs e) { currentMode = SelectionMode.Polygon; axMapControl1.CurrentTool = null; } // 折线选择 private void btnLineSelect_Click(object sender, EventArgs e) { currentMode = SelectionMode.Polyline; axMapControl1.CurrentTool = null; } // 地图鼠标按下事件 private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e) { try { IGeometry geometry = null; switch (currentMode) { case SelectionMode.Rectangle: // 绘制矩形(返回的是IEnvelope��? geometry = axMapControl1.TrackRectangle(); break; case SelectionMode.Circle: IEnvelope envelope = axMapControl1.TrackRectangle(); if (envelope.Width <= 0 || envelope.Height <= 0) { MessageBox.Show("请拖拽有效的矩形范围以创建圆形!"); return; } // 创建圆心��? IPoint center = new PointClass(); center.PutCoords( (envelope.XMin + envelope.XMax) / 2, (envelope.YMin + envelope.YMax) / 2 ); // 计算半径(取矩形宽高的平均值) double radius = Math.Max(envelope.Width, envelope.Height) / 2; // 创建圆形几何 ICircularArc circularArc = new CircularArcClass(); IConstructCircularArc constructArc = (IConstructCircularArc)circularArc; constructArc.ConstructCircle(center, radius, true); // 将圆弧转换为多边��? ISegmentCollection segColl = new PolygonClass(); segColl.AddSegment((ISegment)circularArc); geometry = (IGeometry)segColl; geometry.SpatialReference = axMapControl1.SpatialReference; break; case SelectionMode.Polygon: // 绘制多边��? geometry = axMapControl1.TrackPolygon(); break; case SelectionMode.Polyline: // 绘制折线 geometry = axMapControl1.TrackLine(); break; } if (geometry != null) { PerformSpatialSelection(geometry); HighlightGeometry(geometry); } } catch (Exception ex) { MessageBox.Show("操作失败: {ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error); } } // 执行空间选择 private void PerformSpatialSelection(IGeometry geometry) { try { IMap map = axMapControl1.Map; if (map == null) return; map.ClearSelection(); for (int i = 0; i < map.LayerCount; i++) { IFeatureLayer featureLayer = map.get_Layer(i) as IFeatureLayer; if (featureLayer == null || !featureLayer.Valid || featureLayer.FeatureClass == null) continue; // 检查几何类型是否支持空间查��? if (geometry.GeometryType == esriGeometryType.esriGeometryPoint && featureLayer.FeatureClass.ShapeType != esriGeometryType.esriGeometryPoint) continue; ISpatialFilter filter = new SpatialFilterClass { Geometry = geometry, GeometryField = featureLayer.FeatureClass.ShapeFieldName, SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects }; IFeatureSelection selection = (IFeatureSelection)featureLayer; selection.SelectFeatures(filter, esriSelectionResultEnum.esriSelectionResultNew, false); } axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection, null, null); } catch (Exception ex) { MessageBox.Show("空间查询失败: {ex.Message}"); } } // 高亮显示选择图形(修复版��? private void HighlightGeometry(IGeometry geometry) { if (geometry == null || geometry.IsEmpty) { MessageBox.Show("几何无效��?"); return; } IGraphicsContainer graphicsContainer = axMapControl1.Map as IGraphicsContainer; graphicsContainer.DeleteAllElements(); // 清除旧图��? // 创建符号和元��? IElement element = null; ISymbol symbol = null; switch (geometry.GeometryType) { case esriGeometryType.esriGeometryPolygon: case esriGeometryType.esriGeometryEnvelope: ISimpleFillSymbol fillSymbol = new SimpleFillSymbolClass { Color = GetRgbColor(255, 0, 0, 80), Style = esriSimpleFillStyle.esriSFSSolid }; fillSymbol.Outline = new SimpleLineSymbolClass { Color = GetRgbColor(255, 0, 0), Width = 2 }; symbol = (ISymbol)fillSymbol; element = new PolygonElementClass(); break; case esriGeometryType.esriGeometryPolyline: ISimpleLineSymbol lineSymbol = new SimpleLineSymbolClass { Color = GetRgbColor(255, 0, 0), Width = 3 }; symbol = (ISymbol)lineSymbol; element = new LineElementClass(); break; case esriGeometryType.esriGeometryPoint: ISimpleMarkerSymbol markerSymbol = new SimpleMarkerSymbolClass { Color = GetRgbColor(255, 0, 0), Size = 12, Style = esriSimpleMarkerStyle.esriSMSCircle }; symbol = (ISymbol)markerSymbol; element = new MarkerElementClass(); break; } if (element != null && symbol != null) { element.Geometry = geometry; graphicsContainer.AddElement(element, 0); axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null); } } private IColor GetRgbColor(int p, int p_2, int p_3, int p_4) { throw new NotImplementedException(); } // 创建颜色对象 private IRgbColor GetRGBColor(int r, int g, int b, int alpha = 255) { IRgbColor color = new RgbColorClass(); color.Red = r; color.Green = g; color.Blue = b; color.Transparency = (byte)(255 - alpha); return color; } // 清除选择 private void btnClearSelection_Click(object sender, EventArgs e) { axMapControl1.Map.ClearSelection(); IGraphicsContainer graphicsContainer = axMapControl1.Map as IGraphicsContainer; graphicsContainer.DeleteAllElements(); axMapControl1.Refresh(); } // 新增双击事件处理 private void axMapControl1_OnDoubleClick(object sender, IMapControlEvents2_OnDoubleClickEvent e) { if (currentMode != SelectionMode.None) { currentMode = SelectionMode.None; axMapControl1.CurrentTool = null; axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault; } } // 添加量测按钮点击事件 private void btnMeasureArea_Click(object sender, EventArgs e) { ResetMeasureMode(MeasureMode.Area); lblMeasureResult.Text = "状态:绘制多边形(双击结束��?"; } private void btnMeasureLength_Click(object sender, EventArgs e) { ResetMeasureMode(MeasureMode.Length); lblMeasureResult.Text = "状态:绘制折线(双击结束)"; } private void btnMeasurePoint_Click(object sender, EventArgs e) { ResetMeasureMode(MeasureMode.Point); lblMeasureResult.Text = "状态:移动鼠标查看坐标"; } private void ResetMeasureMode(MeasureMode mode) { currentMeasureMode = mode; ClearTempGraphics(); axMapControl1.CurrentTool = null; axMapControl1.MousePointer = esriControlsMousePointer.esriPointerCrosshair; } private void ClearTempGraphics() { throw new NotImplementedException(); } // 修改后的地图鼠标事件处理 private void axMapControl1_OnMouseDown2(object sender, IMapControlEvents2_OnMouseDownEvent e) { try { if (currentMeasureMode == MeasureMode.None) return; IPoint currentPoint = axMapControl1.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x, e.y); switch (currentMeasureMode) { case MeasureMode.Area: case MeasureMode.Length: if (pointCollection == null) { // 🟢 根据模式创建不同几何类型 pointCollection = currentMeasureMode == MeasureMode.Area ? (IPointCollection)new PolygonClass() : (IPointCollection)new PolylineClass(); pointCollection.AddPoint(currentPoint); } pointCollection.AddPoint(currentPoint); DrawTempGeometry(); break; } } catch (Exception ex) { MessageBox.Show("操作错误:{ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error); } } private void DrawTempGeometry() { throw new NotImplementedException(); } } }using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using ESRI.ArcGIS.Carto; using ESRI.ArcGIS.Display; using ESRI.ArcGIS.Controls; using ESRI.ArcGIS.Geodatabase; namespace WaterPipelineGIS2 { public partial class AttributeTableForm : Form { private IFeatureLayer _featureLayer; private Form1 _mainForm; // 主窗体引��? public AttributeTableForm(IFeatureLayer featureLayer, Form1 mainForm) { InitializeComponent(); _featureLayer = featureLayer; _mainForm = mainForm; // 绑定数据 BindData(); // 绑定行选择事件 dgvAttributes.SelectionChanged += DgvAttributes_SelectionChanged; // 添加行双击事��? dgvAttributes.CellDoubleClick += (s, args) => { if (args.RowIndex >= 0) { int oid = Convert.ToInt32(dgvAttributes.Rows[args.RowIndex].Cells[0].Value); _mainForm.ActivateFeatureLayer(_featureLayer); _mainForm.HighlightAndZoomToFeature(_featureLayer, oid); } }; } private void DgvAttributes_SelectionChanged(object sender, EventArgs e) { if (dgvAttributes.SelectedRows.Count == 0) return; // 获取当前行的 OID int oid = Convert.ToInt32(dgvAttributes.SelectedRows[0].Cells[0].Value); // 激活主窗体的图��? _mainForm.ActivateFeatureLayer(_featureLayer); // 调用主窗体的高亮方法(传递当前图层) _mainForm.HighlightAndZoomToFeature(_featureLayer, oid); } private void BindData() { IFeatureCursor cursor = _featureLayer.FeatureClass.Search(null, true); DataTable dataTable = new DataTable(); // 添加 OID 字段(关键修改:使用要素类的 OID 字段名) dataTable.Columns.Add(_featureLayer.FeatureClass.OIDFieldName, typeof(int)); // 自动获取系统 OID 字段��? // 添加其他字段 for (int i = 0; i < cursor.Fields.FieldCount; i++) { IField field = cursor.Fields.get_Field(i); if (field.Type == esriFieldType.esriFieldTypeOID) continue; // 跳过已添加的 OID 字段 dataTable.Columns.Add(field.Name, GetFieldType(field.Type)); } // 填充数据 IFeature feature; while ((feature = cursor.NextFeature()) != null) { DataRow row = dataTable.NewRow(); row[0] = feature.OID; // 直接使用 OID 属��? for (int i = 0; i < cursor.Fields.FieldCount; i++) { IField field = cursor.Fields.get_Field(i); if (field.Type == esriFieldType.esriFieldTypeOID) continue; row[field.Name] = feature.get_Value(i) ?? DBNull.Value; } dataTable.Rows.Add(row); } dgvAttributes.DataSource = dataTable; } // 辅助方法:将 ArcGIS 字段类型转换��? .NET 类型 private Type GetFieldType(esriFieldType fieldType) { switch (fieldType) { case esriFieldType.esriFieldTypeString: return typeof(string); case esriFieldType.esriFieldTypeInteger: return typeof(int); case esriFieldType.esriFieldTypeDouble: return typeof(double); case esriFieldType.esriFieldTypeDate: return typeof(DateTime); default: return typeof(string); } } } } 此代码能进行空间选择,但是绘制后会弹出报错窗口,且之前绘制后会暂时留下的红色区域不见了,如何解决

using UnityEngine; using UnityEngine.UI; using System.Collections; /// /// 书籍交互控制脚本 /// 功能:实现鼠标点击book对象后,UI图片bookbg平滑过渡到openbg,并使book对象消失 /// /// /// 使用方法��? /// 1. 将此脚本附加到场景中名为"book"的GameObject��? /// 2. 在Inspector面板中分配以下引用: /// - bookbgImage: 拖入UI中的bookbg图片对象 /// - openbgImage: 拖入UI中的openbg图片对象 /// - bookObject: 拖入场景中的book GameObject(通常是附加此脚本的对象) /// 3. 确保book对象具有Collider2D组件(如BoxCollider2D)并勾��?"Is Trigger" /// 4. 可调整transitionTime参数设置过渡动画时长(默认为1秒) /// public class BookInteraction : MonoBehaviour { [Tooltip(“UI中的bookbg图片组件��?)] public Image bookbgImage; [Tooltip(“UI中的openbg图片组件��?)] public Image openbgImage; [Tooltip(“场景中的book游戏对象��?)] public GameObject bookObject; [Tooltip(“图片过渡动画时长(秒)��?)] public float transitionTime = 1.0f; [Tooltip(“诗词面板对象��?)] public GameObject shiciPanel; [Tooltip(“书本类型:Book或Book2��?)] public enum BookType { Book, Book2 } public BookType bookType = BookType.Book; private bool isFirstClickDone = false; // /// 初始化设置,确保图片初始状态正��? /// private void Start() { // 检查并设置bookbg初始透明度为1(可见) if (bookbgImage != null) { Color tempColor = bookbgImage.color; tempColor.a = 1f; bookbgImage.color = tempColor; } else { Debug.LogError(“BookInteraction: bookbgImage未赋值,请在Inspector中设置��?); } // 检查并设置openbg初始透明度为0(透明��? if (openbgImage != null) { Color tempColor = openbgImage.color; tempColor.a = 0f; openbgImage.color = tempColor; } else { Debug.LogError(“BookInteraction: openbgImage未赋值,请在Inspector中设置��?); } // 检查bookObject是否赋��? if (bookObject == null) { Debug.LogError(“BookInteraction: bookObject未赋值,请在Inspector中设置��?); } // 检查碰撞体组件 Collider2D collider = GetComponent(); if (collider == null || !collider.isTrigger) { Debug.LogWarning(“BookInteraction: 对象缺少Collider2D组件或未勾选Is Trigger,点击事件可能无法触发��?); } // 初始化shici面板状��? if (shiciPanel != null) { shiciPanel.SetActive(false); CanvasGroup shiciCanvasGroup = shiciPanel.GetComponent(); if (shiciCanvasGroup != null) { shiciCanvasGroup.alpha = 0f; } } else { Debug.LogError(“BookInteraction: shiciPanel未赋值,请在Inspector中设置��?); } } void Update() { if (isFirstClickDone && Input.GetMouseButtonDown(0)) { // 检查鼠标是否点击在openbgImage��? if (openbgImage != null && RectTransformUtility.RectangleContainsScreenPoint(openbgImage.rectTransform, Input.mousePosition, Camera.main)) { StartCoroutine(TransitionToShiciPanel()); } } } /// /// 协程:平滑过渡openbg消失并显示shici面板 /// private IEnumerator TransitionToShiciPanel() { float elapsedTime = 0f; Color openbgColor = openbgImage.color; float startAlpha = openbgColor.a; // 隐藏openbg while (elapsedTime < transitionTime) { float t = elapsedTime / transitionTime; openbgColor.a = Mathf.Lerp(startAlpha, 0f, t); openbgImage.color = openbgColor; elapsedTime += Time.deltaTime; yield return null; } openbgColor.a = 0f; openbgImage.color = openbgColor; // 显示shici面板 if (shiciPanel != null) { shiciPanel.SetActive(true); CanvasGroup shiciCanvasGroup = shiciPanel.GetComponent(); if (shiciCanvasGroup != null) { elapsedTime = 0f; float targetAlpha = 1f; float startShiciAlpha = shiciCanvasGroup.alpha; while (elapsedTime < transitionTime) { float t = elapsedTime / transitionTime; shiciCanvasGroup.alpha = Mathf.Lerp(startShiciAlpha, targetAlpha, t); elapsedTime += Time.deltaTime; yield return null; } shiciCanvasGroup.alpha = targetAlpha; } } else { Debug.LogError(“BookInteraction: shiciPanel未赋值,请在Inspector中设置��?); } isFirstClickDone = false; // 重置点击状��? } /// /// 鼠标点击事件检��? /// private void OnMouseDown() { // 检查是否所有必要引用都已设��? if (openbgImage != null && shiciPanel != null) { if (bookType == BookType.Book) { // 原有book逻辑需要bookbgImage和bookObject if (bookbgImage != null && bookObject != null) { StartCoroutine(TransitionBackground()); } else { Debug.LogError(“BookInteraction: 缺少book所需的引用��?); } } else if (bookType == BookType.Book2) { StartCoroutine(TransitionToShiciPanel()); } } else { Debug.LogError(“BookInteraction: 缺少必要引用,无法执行过渡动画��?); } } /// /// 协程:平滑过渡背景图片并隐藏book对象 /// private IEnumerator TransitionBackground() { float elapsedTime = 0f; Color bookbgColor = bookbgImage.color; Color openbgColor = openbgImage.color; // 保存初始透明��? float startBookbgAlpha = bookbgColor.a; float startOpenbgAlpha = openbgColor.a; while (elapsedTime < transitionTime) { // 计算过渡进度��?0��?1之间��? float t = elapsedTime / transitionTime; // 使用Mathf.Lerp进行线性插值计算透明��? bookbgColor.a = Mathf.Lerp(startBookbgAlpha, 0f, t); openbgColor.a = Mathf.Lerp(startOpenbgAlpha, 1f, t); // 更新图片透明��? bookbgImage.color = bookbgColor; openbgImage.color = openbgColor; // 累加时间并等待一��? elapsedTime += Time.deltaTime; yield return null; } // 确保最终状态正��? bookbgColor.a = 0f; openbgColor.a = 1f; bookbgImage.color = bookbgColor; openbgImage.color = openbgColor; bookObject.SetActive(false); isFirstClickDone = true; } } 我在unity中做项目,修改代码,实现bookObject在bookbg消失的同时一起消��?

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using ESRI.ArcGIS.Carto; using ESRI.ArcGIS.Controls; using ESRI.ArcGIS.esriSystem; using ESRI.ArcGIS.Geometry; using ESRI.ArcGIS.Geodatabase; using ESRI.ArcGIS.Display; namespace WaterPipelineGIS2 { public partial class Form1 : Form { private IFeatureLayer _selectedFeatureLayer; private System.Drawing.Point _lastRightClickPosition; private enum SelectionMode { None, Rectangle, Circle, Polygon, Polyline } private SelectionMode currentMode = SelectionMode.None; private enum MeasureMode { None, Area, Length, Point } private MeasureMode currentMeasureMode = MeasureMode.None; private IGeometry tempGeometry; private IPointCollection pointCollection; private ToolStripStatusLabel lblMeasureResult; // 修改为ToolStripStatusLabel private IGraphicsContainer _spatialSelectionGraphics; private IGraphicsContainer _attributeHighlightGraphics; private void InitializeGraphicsContainers() { try { if (axMapControl1.ActiveView != null) { _spatialSelectionGraphics = axMapControl1.ActiveView.GraphicsContainer; _attributeHighlightGraphics = axMapControl1.ActiveView.GraphicsContainer; } } catch (Exception ex) { MessageBox.Show("初始化图形容器失��?: " + ex.Message); } } private void Form1_Load(object sender, EventArgs e) { InitializeGraphicsContainers(); // 初始化量测结果标��? lblMeasureResult = new ToolStripStatusLabel(); statusStrip1.Items.Add(lblMeasureResult); } public Form1() { InitializeComponent(); // 确保设计器初始化完成 if (statusStrip1 != null) { lblMeasureResult = new ToolStripStatusLabel(); statusStrip1.Items.Add(lblMeasureResult); } InitializeGraphicsContainers(); axMapControl1.OnMouseMove += new IMapControlEvents2_Ax_OnMouseMoveEventHandler(axMapControl1_OnMouseMove); axMapControl1.OnMouseDown += new IMapControlEvents2_Ax_OnMouseDownEventHandler(axMapControl1_OnMouseDown); axMapControl1.OnDoubleClick += new IMapControlEvents2_Ax_OnDoubleClickEventHandler(axMapControl1_OnDoubleClick); } private void axMapControl1_OnMouseMove(object sender, IMapControlEvents2_OnMouseMoveEvent e) { double mapX = e.mapX; double mapY = e.mapY; lblCoordinate.Text = "X: " + mapX.ToString("F3") + " Y: " + mapY.ToString("F3"); statusStrip1.Refresh(); } private void toolStripMenuItem2_Click(object sender, EventArgs e) { using (var rotateForm = new RotateForm()) { if (rotateForm.ShowDialog() == DialogResult.OK) { try { axMapControl1.Rotation = rotateForm.RotationAngle; axMapControl1.ActiveView.Refresh(); lblCoordinate.Text += " 旋转角度��?" + rotateForm.RotationAngle + "°"; } catch (Exception ex) { MessageBox.Show("旋转失败��?" + ex.Message); } } } } private void axTOCControl1_OnMouseDown(object sender, ITOCControlEvents_OnMouseDownEvent e) { if (e.button == 2) // 右键 { _lastRightClickPosition = new System.Drawing.Point(e.x, e.y); ITOCControl2 tocControl = (ITOCControl2)axTOCControl1.Object; IBasicMap basicMap = null; ILayer layer = null; object other = Type.Missing; object index = Type.Missing; esriTOCControlItem itemType = esriTOCControlItem.esriTOCControlItemNone; tocControl.HitTest(e.x, e.y, ref itemType, ref basicMap, ref layer, ref other, ref index); if (itemType == esriTOCControlItem.esriTOCControlItemLayer && layer != null) { contextMenuStripTOC.Show(axTOCControl1, e.x, e.y); } } } private void openAttributeTableToolStripMenuItem_Click(object sender, EventArgs e) { ITOCControl2 tocControl = (ITOCControl2)axTOCControl1.Object; IBasicMap basicMap = null; ILayer layer = null; object other = Type.Missing; object index = Type.Missing; esriTOCControlItem itemType = esriTOCControlItem.esriTOCControlItemNone; System.Drawing.Point screenPos = contextMenuStripTOC.PointToClient(Control.MousePosition); System.Drawing.Point controlPos = axTOCControl1.PointToClient(Control.MousePosition); tocControl.HitTest( controlPos.X, controlPos.Y, ref itemType, ref basicMap, ref layer, ref other, ref index ); IFeatureLayer featureLayer = layer as IFeatureLayer; if (featureLayer != null) { _selectedFeatureLayer = featureLayer; AttributeTableForm attrForm = new AttributeTableForm( _selectedFeatureLayer, this ); attrForm.Show(); } } private void SetSelectionSymbol() { ISimpleFillSymbol fillSymbol = new SimpleFillSymbolClass(); fillSymbol.Color = GetRgbColor(255, 0, 0); fillSymbol.Style = esriSimpleFillStyle.esriSFSSolid; ISimpleLineSymbol lineSymbol = new SimpleLineSymbolClass(); lineSymbol.Color = GetRgbColor(255, 255, 0); lineSymbol.Width = 2; fillSymbol.Outline = lineSymbol; if (_selectedFeatureLayer != null) { IGeoFeatureLayer geoLayer = (IGeoFeatureLayer)_selectedFeatureLayer; ISimpleRenderer renderer = new SimpleRendererClass(); renderer.Symbol = (ISymbol)fillSymbol; geoLayer.Renderer = (IFeatureRenderer)renderer; axMapControl1.ActiveView.Refresh(); } } private IRgbColor GetRgbColor(int r, int g, int b) { IRgbColor color = new RgbColorClass(); color.Red = r; color.Green = g; color.Blue = b; return color; } private IRgbColor GetRgbColor(int r, int g, int b, int alpha) { IRgbColor color = new RgbColorClass(); color.Red = r; color.Green = g; color.Blue = b; color.Transparency = (byte)(255 - alpha); return color; } public void ActivateFeatureLayer(IFeatureLayer featureLayer) { if (featureLayer == null) return; _selectedFeatureLayer = featureLayer; axMapControl1.ActiveView.Refresh(); axTOCControl1.Update(); } public void HighlightAndZoomToFeature(IFeatureLayer featureLayer, int oid) { try { if (featureLayer == null || featureLayer.FeatureClass == null) { MessageBox.Show("图层或要素类无效��?"); return; } IFeature feature = featureLayer.FeatureClass.GetFeature(oid); if (feature == null || feature.Shape == null) { MessageBox.Show("要素 OID " + oid + " 不存在或无几何!"); return; } IGeometry geometry = feature.Shape; IEnvelope envelope = geometry.Envelope; if (envelope.IsEmpty || envelope.Width == 0 || envelope.Height == 0) { envelope.Expand(10, 10, true); } else { envelope.Expand(1.5, 1.5, true); } axMapControl1.Extent = envelope; axMapControl1.ActiveView.ScreenDisplay.UpdateWindow(); HighlightGeometry(geometry); } catch (Exception ex) { MessageBox.Show("高亮要素失败: " + ex.Message); } } private void btnRectSelect_Click(object sender, EventArgs e) { currentMode = SelectionMode.Rectangle; axMapControl1.CurrentTool = null; axMapControl1.MousePointer = esriControlsMousePointer.esriPointerCrosshair; } private void btnCircleSelect_Click(object sender, EventArgs e) { currentMode = SelectionMode.Circle; axMapControl1.CurrentTool = null; axMapControl1.MousePointer = esriControlsMousePointer.esriPointerCrosshair; } private void btnPolygonSelect_Click(object sender, EventArgs e) { currentMode = SelectionMode.Polygon; axMapControl1.CurrentTool = null; axMapControl1.MousePointer = esriControlsMousePointer.esriPointerCrosshair; } private void btnLineSelect_Click(object sender, EventArgs e) { currentMode = SelectionMode.Polyline; axMapControl1.CurrentTool = null; axMapControl1.MousePointer = esriControlsMousePointer.esriPointerCrosshair; } private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e) { try { if (currentMode != SelectionMode.None) { HandleSpatialSelection(e); return; } if (currentMeasureMode != MeasureMode.None) { HandleMeasurement(e); } } catch (Exception ex) { MessageBox.Show("操作错误��?" + ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error); } } private void PerformSpatialSelection(IGeometry geometry) { try { IMap map = axMapControl1.Map; if (map == null) return; map.ClearSelection(); for (int i = 0; i < map.LayerCount; i++) { IFeatureLayer featureLayer = map.get_Layer(i) as IFeatureLayer; if (featureLayer == null || !featureLayer.Valid || featureLayer.FeatureClass == null) continue; ISpatialFilter filter = new SpatialFilterClass(); filter.Geometry = geometry; filter.GeometryField = featureLayer.FeatureClass.ShapeFieldName; filter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects; IFeatureSelection selection = (IFeatureSelection)featureLayer; selection.SelectFeatures(filter, esriSelectionResultEnum.esriSelectionResultNew, false); } axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection, null, null); axMapControl1.ActiveView.Refresh(); } catch (Exception ex) { MessageBox.Show("空间查询失败: " + ex.Message); } } private void HighlightGeometry(IGeometry geometry) { try { if (_spatialSelectionGraphics != null) { _spatialSelectionGraphics.DeleteAllElements(); } IElement element = null; switch (geometry.GeometryType) { case esriGeometryType.esriGeometryPolygon: { ISimpleFillSymbol fillSymbol = new SimpleFillSymbolClass(); fillSymbol.Color = GetRgbColor(255, 0, 0, 80); ISimpleLineSymbol outline = new SimpleLineSymbolClass(); outline.Color = GetRgbColor(255, 0, 0); outline.Width = 2; fillSymbol.Outline = outline; element = new PolygonElementClass(); element.Geometry = geometry; ((IFillShapeElement)element).Symbol = fillSymbol; } break; case esriGeometryType.esriGeometryPolyline: { ISimpleLineSymbol lineSymbol = new SimpleLineSymbolClass(); lineSymbol.Color = GetRgbColor(255, 0, 0); lineSymbol.Width = 3; element = new LineElementClass(); element.Geometry = geometry; ((ILineElement)element).Symbol = lineSymbol; } break; case esriGeometryType.esriGeometryPoint: { ISimpleMarkerSymbol markerSymbol = new SimpleMarkerSymbolClass(); markerSymbol.Color = GetRgbColor(255, 0, 0); markerSymbol.Size = 12; element = new MarkerElementClass(); element.Geometry = geometry; ((IMarkerElement)element).Symbol = markerSymbol; } break; } if (element != null && _spatialSelectionGraphics != null) { _spatialSelectionGraphics.AddElement(element, 0); axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null); } } catch (Exception ex) { MessageBox.Show("高亮显示失败: " + ex.Message); } } private void btnClearSelection_Click(object sender, EventArgs e) { try { if (axMapControl1.Map != null) { axMapControl1.Map.ClearSelection(); } if (_spatialSelectionGraphics != null) { _spatialSelectionGraphics.DeleteAllElements(); } ClearTempGraphics(); axMapControl1.ActiveView.PartialRefresh( esriViewDrawPhase.esriViewGeoSelection | esriViewDrawPhase.esriViewGraphics, null, null ); axMapControl1.ActiveView.Refresh(); currentMode = SelectionMode.None; axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault; currentMeasureMode = MeasureMode.None; } catch (Exception ex) { MessageBox.Show("清除选择失败: " + ex.Message); } } private void axMapControl1_OnDoubleClick(object sender, IMapControlEvents2_OnDoubleClickEvent e) { if (currentMode != SelectionMode.None) { currentMode = SelectionMode.None; axMapControl1.CurrentTool = null; axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault; } if (currentMeasureMode == MeasureMode.Area || currentMeasureMode == MeasureMode.Length) { if (pointCollection != null && pointCollection.PointCount > 1) { ShowMeasureResult(); pointCollection = null; currentMeasureMode = MeasureMode.None; axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault; } } } private void btnMeasureArea_Click(object sender, EventArgs e) { ResetMeasureMode(MeasureMode.Area); if (lblMeasureResult != null) lblMeasureResult.Text = "状态:绘制多边形(双击结束��?"; } private void btnMeasureLength_Click(object sender, EventArgs e) { ResetMeasureMode(MeasureMode.Length); if (lblMeasureResult != null) lblMeasureResult.Text = "状态:绘制折线(双击结束)"; } private void btnMeasurePoint_Click(object sender, EventArgs e) { ResetMeasureMode(MeasureMode.Point); if (lblMeasureResult != null) lblMeasureResult.Text = "状态:移动鼠标查看坐标"; } private void ResetMeasureMode(MeasureMode mode) { currentMeasureMode = mode; ClearTempGraphics(); axMapControl1.CurrentTool = null; axMapControl1.MousePointer = esriControlsMousePointer.esriPointerCrosshair; } private void ClearTempGraphics() { try { if (_spatialSelectionGraphics != null) { _spatialSelectionGraphics.DeleteAllElements(); axMapControl1.ActiveView.PartialRefresh( esriViewDrawPhase.esriViewGraphics, null, null ); } pointCollection = null; } catch (Exception ex) { MessageBox.Show("清除临时图形失败: " + ex.Message); } } private void HandleSpatialSelection(IMapControlEvents2_OnMouseDownEvent e) { IGeometry geometry = null; switch (currentMode) { case SelectionMode.Rectangle: IEnvelope rectEnv = axMapControl1.TrackRectangle(); if (rectEnv != null) { IPolygon polygon = new PolygonClass(); polygon.SpatialReference = axMapControl1.SpatialReference; ISegmentCollection segColl = (ISegmentCollection)polygon; segColl.SetRectangle(rectEnv); geometry = (IGeometry)polygon; } break; case SelectionMode.Circle: IEnvelope envelope = axMapControl1.TrackRectangle(); if (envelope.Width <= 0 || envelope.Height <= 0) { MessageBox.Show("请拖拽有效的矩形范围以创建圆形!"); return; } IPoint center = new PointClass(); center.PutCoords( (envelope.XMin + envelope.XMax) / 2, (envelope.YMin + envelope.YMax) / 2 ); double radius = Math.Max(envelope.Width, envelope.Height) / 2; ICircularArc circularArc = new CircularArcClass(); IConstructCircularArc constructArc = (IConstructCircularArc)circularArc; constructArc.ConstructCircle(center, radius, true); ISegmentCollection circleSegColl = new PolygonClass(); circleSegColl.AddSegment((ISegment)circularArc); geometry = (IGeometry)circleSegColl; geometry.SpatialReference = axMapControl1.SpatialReference; break; case SelectionMode.Polygon: geometry = axMapControl1.TrackPolygon(); break; case SelectionMode.Polyline: geometry = axMapControl1.TrackLine(); break; } if (geometry != null) { PerformSpatialSelection(geometry); HighlightGeometry(geometry); } } private void HandleMeasurement(IMapControlEvents2_OnMouseDownEvent e) { if (currentMeasureMode == MeasureMode.None) return; IPoint currentPoint = axMapControl1.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x, e.y); switch (currentMeasureMode) { case MeasureMode.Area: case MeasureMode.Length: if (pointCollection == null) { pointCollection = currentMeasureMode == MeasureMode.Area ? (IPointCollection)new PolygonClass() : (IPointCollection)new PolylineClass(); pointCollection.AddPoint(currentPoint); } pointCollection.AddPoint(currentPoint); DrawTempGeometry(); break; } } private void DrawTempGeometry() { if (pointCollection == null) return; ClearTempGraphics(); IElement element = null; if (pointCollection is IPolygon) { ISimpleFillSymbol fillSymbol = new SimpleFillSymbolClass(); fillSymbol.Color = GetRgbColor(0, 255, 0, 50); ISimpleLineSymbol outline = new SimpleLineSymbolClass(); outline.Color = GetRgbColor(0, 255, 0); outline.Width = 2; fillSymbol.Outline = outline; element = new PolygonElementClass(); element.Geometry = (IGeometry)pointCollection; ((IFillShapeElement)element).Symbol = fillSymbol; } else if (pointCollection is IPolyline) { ISimpleLineSymbol lineSymbol = new SimpleLineSymbolClass(); lineSymbol.Color = GetRgbColor(0, 255, 0); lineSymbol.Width = 2; element = new LineElementClass(); element.Geometry = (IGeometry)pointCollection; ((ILineElement)element).Symbol = lineSymbol; } if (element != null && _spatialSelectionGraphics != null) { _spatialSelectionGraphics.AddElement(element, 0); axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null); } } private void ShowMeasureResult() { try { if (pointCollection == null) return; double result = 0; string unit = ""; ISpatialReference spatialRef = axMapControl1.SpatialReference; if (pointCollection is IPolygon) { IPolygon polygon = pointCollection as IPolygon; ITopologicalOperator topoOp = polygon as ITopologicalOperator; topoOp.Simplify(); IArea area = polygon as IArea; result = area.Area; unit = "平方��?"; } else if (pointCollection is IPolyline) { IPolyline polyline = pointCollection as IPolyline; ICurve curve = polyline as ICurve; result = curve.Length; unit = "��?"; } else { return; } if (lblMeasureResult != null) lblMeasureResult.Text = "测量结果: " + result.ToString("F2") + " " + unit; } catch (Exception ex) { MessageBox.Show("计算量测结果失败: " + ex.Message); } } } }点击空间量测后怎么进行量测,我怎么右击mapcontrol控件(axMapControl1)不进行绘制量测呢,给出修改后的完整代码,不要省略任何部分,注意vs版本��?2010

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