ServerValidateEventArgs.Value Property
Gets the value to validate in the custom event handler for the ServerValidate event.
[Visual Basic] Public ReadOnly Property Value As String [C#] public string Value {get;} [C++] public: __property String* get_Value(); [JScript] public function get Value() : String;
Property Value
The value to validate in the custom event handler for the ServerValidate event.
Remarks
Use the Value property determine the value to validate in the custom event handler for the ServerValidate event. Notice that you cannot programmatically change this value.
Example
[Visual Basic, C#] The following example demonstrates how to use the Value property to determine the value to validate.
[Visual Basic] <%@ Page Language="VB" AutoEventWireup="True" %> <html> <head> <script runat="server"> Sub ValidateBtn_OnClick(sender As Object, e As EventArgs) ' Display whether the page passed validation. If Page.IsValid Then Message.Text = "Page is valid." Else Message.Text = "Page is not valid!" End If End Sub Sub ServerValidation(source As Object, args As ServerValidateEventArgs) Try ' Test whether the value entered into the text box is even. Dim num As Integer = Integer.Parse(args.Value) args.IsValid = ((num mod 2) = 0) Catch ex As Exception args.IsValid = false End Try End Sub </script> </head> <body> <form runat="server"> <h3>CustomValidator ServerValidate Example</h3> <asp:Label id="Message" Text="Enter an even number:" Font-Name="Verdana" Font-Size="10pt" runat="server" /> <p> <asp:TextBox id="Text1" runat="server" /> <asp:CustomValidator id="CustomValidator1" ControlToValidate="Text1" Display="Static" ErrorMessage="Not an even number!" ForeColor="green" Font-Name="verdana" Font-Size="10pt" OnServerValidate="ServerValidation" runat="server"/> <p> <asp:Button id="Button1" Text="Validate" OnClick="ValidateBtn_OnClick" runat="server"/> </form> </body> </html> [C#] <%@ Page Language="C#" AutoEventWireup="True" %> <html> <head> <script runat="server"> void ValidateBtn_OnClick(object sender, EventArgs e) { // Display whether the page passed validation. if (Page.IsValid) { Message.Text = "Page is valid."; } else { Message.Text = "Page is not valid!"; } } void ServerValidation(object source, ServerValidateEventArgs args) { try { // Test whether the value entered into the text box is even. int i = int.Parse(args.Value); args.IsValid = ((i%2) == 0); } catch(Exception ex) { args.IsValid = false; } } </script> </head> <body> <form runat="server"> <h3>CustomValidator ServerValidate Example</h3> <asp:Label id="Message" Text="Enter an even number:" Font-Name="Verdana" Font-Size="10pt" runat="server"/> <p> <asp:TextBox id="Text1" runat="server" /> <asp:CustomValidator id="CustomValidator1" ControlToValidate="Text1" Display="Static" ErrorMessage="Not an even number!" ForeColor="green" Font-Name="verdana" Font-Size="10pt" OnServerValidate="ServerValidation" runat="server"/> <p> <asp:Button id="Button1" Text="Validate" OnClick="ValidateBtn_OnClick" runat="server"/> </form> </body> </html>
[C++, JScript] No example is available for C++ or JScript. To view a Visual Basic or C# example, click the Language Filter button
in the upper-left corner of the page.
Requirements
Platforms: Windows 2000, Windows XP Professional, Windows Server 2003 family
See Also
ServerValidateEventArgs Class | ServerValidateEventArgs Members | System.Web.UI.WebControls Namespace | IsValid