winform图片批量生成缩略图，并批量显示资源-CSDN下载

共55个文件

resources：13个

cs：11个

htm：4个

winform

批量生成

嵌套网页

webBrowser

5星 · 超过95%的资源需积分: 50 184 浏览量 2012-06-06 10:07:21 上传评论 4 收藏 279KB RAR 举报

在Windows Forms（Winform）应用开发中，有时候我们需要处理大量图片，例如创建一个图片库或者相册应用。这时，批量生成缩略图并有效显示就显得尤为重要。本篇将详细介绍如何在Winform中实现这个功能，包括批量生成缩略图、在列表中展示以及通过嵌套WebBrowser控件实现图片预览。批量生成缩略图的过程涉及图像处理。在.NET Framework中，我们可以使用System.Drawing命名空间下的类，如Bitmap和Graphics。以下是一个简单的缩略图生成方法： ```csharp public static Image GenerateThumbnail(Image originalImage, int maxWidth, int maxHeight) { float widthRatio = (float)maxWidth / originalImage.Width; float heightRatio = (float)maxHeight / originalImage.Height; float ratio = Math.Min(widthRatio, heightRatio); int newWidth = (int)(originalImage.Width * ratio); int newHeight = (int)(originalImage.Height * ratio); Bitmap thumbnail = new Bitmap(newWidth, newHeight); using (Graphics graphics = Graphics.FromImage(thumbnail)) { graphics.InterpolationMode = InterpolationMode.HighQualityBicubic; graphics.DrawImage(originalImage, 0, 0, newWidth, newHeight); } return thumbnail; } ``` 接下来，我们需要在Winform界面中展示这些缩略图。可以使用ListView控件，它支持自定义列显示，并且可以方便地添加缩略图作为图标。为每个ListView项添加缩略图，可以这样操作： ```csharp private void AddImageToListView(string imagePath) { Image thumbnail = GenerateThumbnail(Image.FromFile(imagePath), 100, 100); // 自定义缩略图大小 ImageList imageList = new ImageList(); imageList.Images.Add("thumbnail", thumbnail); ListViewItem item = new ListViewItem(); item.ImageKey = "thumbnail"; item.Text = Path.GetFileName(imagePath); listView.Items.Add(item); } ``` 至于如何在点击列表后显示原图，这里采用嵌套WebBrowser控件的方式。WebBrowser控件可以方便地加载和显示HTML页面，包括图片。我们可以在点击ListView项时，动态生成包含原图URL的HTML页面，然后加载到WebBrowser控件中： ```csharp private void listView_ItemActivate(object sender, EventArgs e) { ListViewItem selectedItem = listView.SelectedItems[0]; string imagePath = selectedItem.Text; // 假设列表项文本是图片路径 webBrowser.Navigate("about:blank"); // 清空当前页面 webBrowser.DocumentText = $"<html><body><img src=\"{imagePath}\" alt=\"\"></body></html>"; } ``` 为了优化性能，避免一次性加载所有图片导致内存占用过高，可以使用异步处理和缓存策略。例如，只在ListView项被选中时才生成和加载对应缩略图，或使用内存缓存存储已生成的缩略图。通过以上步骤，我们能够在Winform应用中实现图片的批量生成缩略图、列表显示以及通过嵌套WebBrowser控件预览原图的功能。这种方式既节省了资源，又提供了良好的用户体验。在实际开发中，还可以根据需求进一步优化，例如添加进度条显示、错误处理等。

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WindowsFormsThreading.rar （55个子文件）

WindowsFormsThreading

MessageForm.resx 6KB

WindowsFormsThreading.sln 883B

MessageForm.designer.cs 2KB

WindowsFormsThreading.csproj 5KB

Program.cs 506B

Common

PicAction.cs 11KB

WebPageBitmap.cs 4KB

ThreadTemp.cs 353B

缩略图.cs 6KB

Properties

Settings.settings 249B

Resources.Designer.cs 3KB

AssemblyInfo.cs 1KB

Settings.Designer.cs 1KB

Resources.resx 5KB

缩略图.Designer.cs 16KB

App.config 159B

WindowsFormsThreading.suo 27KB

obj

x86

Debug

WindowsFormsThreading.FormThreading.resources 180B

WindowsFormsThreading.csproj.FileListAbsolute.txt 3KB

WindowsFormsThreading.TestLockForm.resources 180B

GenerateResource.read.1.tlog 2KB

WindowsFormsThreading.ReportViewerTestForm.resources 180B

WindowsFormsThreading.FormTimer.resources 180B

ResolveAssemblyReference.cache 34KB

WindowsFormsThreading.MessageForm.resources 180B

WindowsFormsThreading.缩略图.resources 180B

WindowsFormsThreading.Form1.resources 1KB

WindowsFormsThreading.Catch.resources 180B

TempPE

Properties.Resources.Designer.cs.dll 5KB

WindowsFormsThreading.exe 23KB

WindowsFormsThreading.按钮代替滚动条.resources 180B

DesignTimeResolveAssemblyReferencesInput.cache 7KB

WindowsFormsThreading.PsychologyDataConvertForm.resources 180B

WindowsFormsThreading.FormTest.resources 180B

DesignTimeResolveAssemblyReferences.cache 19KB

GenerateResource.write.1.tlog 6KB

WindowsFormsThreading.截图.resources 180B

WindowsFormsThreading.Properties.Resources.resources 180B

WindowsFormsThreading.pdb 52KB

缩略图.resx 6KB

bin

Debug

WindowsFormsThreading.vshost.exe.config 159B

WindowsFormsThreading.vshost.exe 11KB

WindowsFormsThreading.exe 23KB

WindowsFormsThreading.exe.config 159B

Newtonsoft.Json.dll 333KB

WindowsFormsThreading.pdb 52KB

HTML

PicShow.htm 632B

PicList.htm 2KB

json.js 19KB

jquery-1.7.2.min.js 93KB

Release

HTML

images

PicShow.htm 763B

PicList.htm 2KB

json.js 19KB

jquery-1.7.2.min.js 93KB

MessageForm.cs 734B

E:\test\SolutionExercise\WindowsFormsThreading\bin\Debug\WindowsFormsThreading.exe E:\test\SolutionExercise\WindowsFormsThreading\bin\Debug\WindowsFormsThreading.pdb E:\test\SolutionExercise\WindowsFormsThreading\bin\Debug\Newtonsoft.Json.dll E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\ResolveAssemblyReference.cache E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.Catch.resources E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.FormThreading.resources E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.FormTimer.resources E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.MessageForm.resources E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.Properties.Resources.resources E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.PsychologyDataConvertForm.resources E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.TestLockForm.resources E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\GenerateResource.read.1.tlog E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\GenerateResource.write.1.tlog E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.exe E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.pdb E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.缩略图.resources E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.截图.resources E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.Form1.resources E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.按钮代替滚动条.resources E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.ReportViewerTestForm.resources E:\test\SolutionExercise\WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.FormTest.resources E:\test\SolutionExercise\WindowsFormsThreading\bin\Debug\WindowsFormsThreading.exe.config C:\Documents and Settings\Administrator\桌面\复件 WindowsFormsThreading\bin\Debug\WindowsFormsThreading.exe.config C:\Documents and Settings\Administrator\桌面\复件 WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.exe C:\Documents and Settings\Administrator\桌面\复件 WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.pdb C:\Documents and Settings\Administrator\桌面\复件 WindowsFormsThreading\obj\x86\Debug\ResolveAssemblyReference.cache C:\Documents and Settings\Administrator\桌面\复件 WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.Properties.Resources.resources C:\Documents and Settings\Administrator\桌面\复件 WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.缩略图.resources C:\Documents and Settings\Administrator\桌面\复件 WindowsFormsThreading\obj\x86\Debug\GenerateResource.read.1.tlog C:\Documents and Settings\Administrator\桌面\复件 WindowsFormsThreading\obj\x86\Debug\GenerateResource.write.1.tlog C:\Documents and Settings\Administrator\桌面\复件 WindowsFormsThreading\obj\x86\Debug\WindowsFormsThreading.MessageForm.resources C:\Documents and Settings\Administrator\桌面\复件 WindowsFormsThreading\bin\Debug\WindowsFormsThreading.exe C:\Documents and Settings\Administrator\桌面\复件 WindowsFormsThreading\bin\Debug\WindowsFormsThreading.pdb

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