ServerValidateEventArgs.IsValid Property
Gets or sets whether the value specified by the Value property passed validation.
Namespace: System.Web.UI.WebControls
Assembly: System.Web (in System.Web.dll)
Once your validation routine finishes, use the IsValid property to indicate whether the value specified by the Value property passed validation. This value determines whether the input control associated with the CustomValidator control passed validation.
| Topic | Location |
|---|---|
| Walkthrough: Validating User Input in a Web Forms Page | Building ASP .NET Web Applications in Visual Studio |
The following example demonstrates how to use the IsValid property to store the results of the validation.
<%@ Page Language="C#" AutoEventWireup="True" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title>CustomValidator ServerValidate Example</title> <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 id="form1" runat="server"> <h3>CustomValidator ServerValidate Example</h3> <asp:Label id="Message" Text="Enter an even number:" Font-Names="Verdana" Font-Size="10pt" runat="server" AssociatedControlID="Text1"/> <br /> <asp:TextBox id="Text1" runat="server" /> <asp:CustomValidator id="CustomValidator1" ControlToValidate="Text1" Display="Static" ErrorMessage="Not an even number!" ForeColor="green" Font-Names="verdana" Font-Size="10pt" OnServerValidate="ServerValidation" runat="server"/> <br /> <asp:Button id="Button1" Text="Validate" OnClick="ValidateBtn_OnClick" runat="server"/> </form> </body> </html>
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
