Chapter 3 (validation control)
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The document discusses different types of validation controls in ASP.NET including required field, range, regular expression, compare, custom, and validation summary controls. It provides examples of how to use each control, describing their important properties and how they validate user input. Validation controls are used to validate user input and ensure accurate data entry.
![RegularExpspressionValidator
To set the word boundary use
b ….. b
[Range of Input]
Example you can set the format for letter input a-z and A-Z as below:
b[A-Za-z]+b
<asp:TextBox ID=fName runat=server ></asp:TextBox>
<asp:RegularExpressionValidator runat=server ID=fNameVal ControlToValidate=fName
ValidationExpression="b[A-Z]+b" ErrorMessage="Enter the Letter [a-z, A-Z]
only"></asp:RegularExpressionValidator>
ValidationControlហ ោសូហនឿន
9](https://image.slidesharecdn.com/chapter3validationcontrol-150820163223-lva1-app6891/85/Chapter-3-validation-control-9-320.jpg)
![RegularExpspressionValidator
There are some more important forms of the
expression format.
w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*
[0-9]{3}-[0-9]{6}
[0-9]{3}-[0-9]{6,7}
ValidationControlហ ោសូហនឿន
10](https://image.slidesharecdn.com/chapter3validationcontrol-150820163223-lva1-app6891/85/Chapter-3-validation-control-10-320.jpg)
![ValidationSummary
See The Example:
<body>
<form id="form1" runat="server">
First Name:
<asp:TextBox ID=fName runat=server ></asp:TextBox>
<asp:RequiredFieldValidator runat=server ID=RefNameVal
ControlToValidate=fName ErrorMessage="First Name
Needed"></asp:RequiredFieldValidator>
<asp:RegularExpressionValidator runat=server ID=EprfNameVal
ControlToValidate=fName ValidationExpression="b[A-z]+b"
ErrorMessage="No Number Permited">
</asp:RegularExpressionValidator>
<br />
Last Name:
<asp:TextBox ID=lName runat=server></asp:TextBox>
ValidationControlហ ោសូហនឿន
19](https://image.slidesharecdn.com/chapter3validationcontrol-150820163223-lva1-app6891/85/Chapter-3-validation-control-19-320.jpg)
![ValidationSummary
See The Example:
<asp:RequiredFieldValidator runat=server ID=RelNameVal
ControlToValidate=lName ErrorMessage="Last Name
Needed"></asp:RequiredFieldValidator>
<asp:RegularExpressionValidator runat=server ID=ExplNameVal
ValidationExpression="b[A-Z]+b" ControlToValidate=lName
ErrorMessage="Capital Letter Only">
</asp:RegularExpressionValidator> <br/>
<asp:Button runat=server ID=btnSubmit Text=Submit />
<br />
<asp:ValidationSummary ID=valSummary
ShowMessageBox=true runat=server />
</form>
</body>
ValidationControlហ ោសូហនឿន
20](https://image.slidesharecdn.com/chapter3validationcontrol-150820163223-lva1-app6891/85/Chapter-3-validation-control-20-320.jpg)
Chapter 3 (validation control)
- 1. Chapter 3 Validation Controls ValidationControl ហ ោសូហនឿន 1
- 2. Introduction Used to validate User-Input in an input control. The page validation is performed when a Button, ImageButton, or Link control is clicked. Setting CauseValidation to False is to cancel Validation. ValidationControlហ ោសូហនឿន 2
- 3. Types of Validation Controls There are 6 types of Validation Controls RequiredFiledValidator Control RangeValidator Control RegularExpressionValidator Control CompareValidator Control CustomValidator Control ValidationSummary Control ValidationControlហ ោសូហនឿន 3
- 4. RequiredFieldValidator To make sure that has entered the required data in the input control(TextBox). <asp:RequiredFieldValidator runat=server ID=… ControlToValidate=… ErrorMessage=“…."> </asp:RequiredFieldValidator> ValidationControlហ ោសូហនឿន 4
- 5. RequiredFieldValidator See the example: <body> <form id="form1" runat="server"> <asp:TextBox ID=fName runat=server> </asp:TextBox> <asp:RequiredFieldValidator runat=server ID=fNameVal ControlToValidate=fName ErrorMessage="Please Enter the First Name"></asp:RequiredFieldValidator> <asp:Button ID=Submit runat=server Text=Submit /> </form> </body> ValidationControlហ ោសូហនឿន 5
- 6. RangeValidator To check that the values input is what in the specified range of values. There are some important properties: ControlToValidate MinimumValue MaximumValue Type <asp:RangeValidator runat=server ID=… ControlToValidate=… Type=… MinimumValue=… MaximumValue=… ErrorMessage=“…"> </asp:RangeValidator> ValidationControlហ ោសូហនឿន 6
- 7. RangeValidator See the Example: <body> <form id="form1" runat="server"> <asp:TextBox ID=fName runat=server> </asp:TextBox> <asp:RangeValidator runat=server ControlToValidate=fName MinimumValue="A" MaximumValue="Z" Type=String ID=fNameVal ErrorMessage="Capital Only" CultureInvariantValues="True"></asp:RangeValidator> <br /> <asp:Button ID=Submit runat=server Text=Submit /> </form> </body> ValidationControlហ ោសូហនឿន 7
- 8. RegularExpspressionValidator To make sure the data input into the input box match the specified the format. It is made up of text with an embedded code started with a backslash (). The property ValidateExpression is used the format the data input. ValidationControlហ ោសូហនឿន 8
- 9. RegularExpspressionValidator To set the word boundary use b ….. b [Range of Input] Example you can set the format for letter input a-z and A-Z as below: b[A-Za-z]+b <asp:TextBox ID=fName runat=server ></asp:TextBox> <asp:RegularExpressionValidator runat=server ID=fNameVal ControlToValidate=fName ValidationExpression="b[A-Z]+b" ErrorMessage="Enter the Letter [a-z, A-Z] only"></asp:RegularExpressionValidator> ValidationControlហ ោសូហនឿន 9
- 10. RegularExpspressionValidator There are some more important forms of the expression format. w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)* [0-9]{3}-[0-9]{6} [0-9]{3}-[0-9]{6,7} ValidationControlហ ោសូហនឿន 10
- 11. CompareValidator It is used to compare the value entered by a user into an input box to another. Some properties used with the CompareValidator are: ControlToCompare Operator ValueToCompare ControlToValidate Type ErrorMessage ValidationControlហ ោសូហនឿន 11
- 12. CompareValidator The Operator property has the following value: Equal NotEqual GreaterThan GreaterThanEqual LessThan LessThanEqual DataTypeCheck ValidationControlហ ោសូហនឿន 12
- 13. CompareValidator See the example: <body> <form id="form1" runat="server"> User Name: <asp:TextBox ID=txtuser runat=server > </asp:TextBox> <asp:CompareValidator runat=server ControlToValidate=txtuser ValueToCompare="sonoeun" ErrorMessage="Invalid User Name"> </asp:CompareValidator> <br /> <asp:Button runat=server ID=bntSubmit Text=Submit /> </form> </body> ValidationControlហ ោសូហនឿន 13
- 14. CustomValidator To check that the data input matches the a given condition or not. It is a powerful way to use the Validator controls since you can write your own customization code. It uses the main properties and methods as below: ClientValidationFunction: To set the name of the custom client-side script function used for Validation. ValidateEmptyText: To set a boolean value to make sure if the empty text should be validated or not. ServerValidate : The method occurring when the validation takes place on the server. ValidationControlហ ោសូហនឿន 14
- 15. CustomValidator See the Example <body> <form id="form1" runat="server"> <script language=vbscript runat=server type="text/vbscript" > Sub serverVal(ByVal source, ByVal objServer) If (objServer.value = "ServerValidation") Then objServer.IsValid = True lbl.Text = "Subscription Successful" Else objServer.IsValid = False lbl.Text = "Subscription Not Successful" End If End Sub </script> ValidationControlហ ោសូហនឿន 15
- 16. CustomValidator See the Example (cont.) <asp:TextBox ID=ServerObj runat=server ></asp:TextBox> <asp:CustomValidator ID=ServerObjVal runat=server OnServerValidate="serverVal" ControlToValidate=ServerObj ErrorMessage="Subscription NOT Accepted"> </asp:CustomValidator> <br /> <asp:Button runat=server ID=submitServer Text=Submit /> <br /> <asp:label ID=lbl runat=server ></asp:label> </form> </body> ValidationControlហ ោសូហនឿន 16
- 17. ValidationSummary It collects all validation control error messages for centralized display. It can be displayed as a list, a bullet list, a single paragraph depending on the DisplayMode Specifying the summary display by setting ShowSummary and ShowMessageBox properties. ValidationControlហ ោសូហនឿន 17
- 18. ValidationSummary Some properties you should know when you use validationSummary are: DisplayedMode EnableClientScript ForeColor HeaderText ShowMessageBox ShowSummary ValidationControlហ ោសូហនឿន 18
- 19. ValidationSummary See The Example: <body> <form id="form1" runat="server"> First Name: <asp:TextBox ID=fName runat=server ></asp:TextBox> <asp:RequiredFieldValidator runat=server ID=RefNameVal ControlToValidate=fName ErrorMessage="First Name Needed"></asp:RequiredFieldValidator> <asp:RegularExpressionValidator runat=server ID=EprfNameVal ControlToValidate=fName ValidationExpression="b[A-z]+b" ErrorMessage="No Number Permited"> </asp:RegularExpressionValidator> <br /> Last Name: <asp:TextBox ID=lName runat=server></asp:TextBox> ValidationControlហ ោសូហនឿន 19
- 20. ValidationSummary See The Example: <asp:RequiredFieldValidator runat=server ID=RelNameVal ControlToValidate=lName ErrorMessage="Last Name Needed"></asp:RequiredFieldValidator> <asp:RegularExpressionValidator runat=server ID=ExplNameVal ValidationExpression="b[A-Z]+b" ControlToValidate=lName ErrorMessage="Capital Letter Only"> </asp:RegularExpressionValidator> <br/> <asp:Button runat=server ID=btnSubmit Text=Submit /> <br /> <asp:ValidationSummary ID=valSummary ShowMessageBox=true runat=server /> </form> </body> ValidationControlហ ោសូហនឿន 20
- 21. ValidationGroup It a property of Validator controls. Setting ValidationGroup, it validates only the validation controls within the specified group when the control is post back to the server. It is used to assign a validation control to a validation group. ValidationControlហ ោសូហនឿន 21
- 22. ValidationGroup Example ValidationControlហ ោសូហនឿន 22 <body> <form id="form1" runat="server"> <div> <asp:TextBox ID="TextBox1" Runat="server" ValidationGroup="First"> </asp:TextBox> <asp:TextBox ID="TextBox2" Runat="server" ValidationGroup="First"> </asp:TextBox><br /> <asp:RequiredFieldValidator ID="RequiredFieldValidator1" Runat="server" ValidationGroup="First" ErrorMessage="TextBox1 should not be blank" ControlToValidate="TextBox1"> </asp:RequiredFieldValidator> <asp:Button ID="Submit1" Runat="server" ValidationGroup="First" Text="Submit 1" /> <br /> <br />
- 23. ValidationGroup ValidationControlហ ោសូហនឿន 23 <asp:TextBox ID="TextBox3" Runat="server" ValidationGroup="Second"> </asp:TextBox> <asp:TextBox ID="TextBox4" Runat="server" ValidationGroup="Second"> </asp:TextBox> <asp:RequiredFieldValidator ID="RequiredFieldValidator2" Runat="server" ErrorMessage=" TextBox3 should not be blank" ControlToValidate="TextBox3" ValidationGroup="Second"> </asp:RequiredFieldValidator> <asp:Button ID="Submit2" Runat="server" ValidationGroup="Second" Text="Submit 2" /> </div> </form> </body>