CompareValidator.ControlPropertiesValid Method ()
This API supports the product infrastructure and is not intended to be used directly from your code.
Checks the properties of the control for valid values.
Assembly: System.Web (in System.Web.dll)
| Exception | Condition |
|---|---|
| HttpException | ControlToValidate and ControlToCompare have the same ID. |
| HttpException | The value of a target property cannot be converted to the expected Type. |
The following code example demonstrates how to override the ControlPropertiesValid method in a custom server control so that it always returns the value of the visible property, as long as the ControlToCompare property of the CompareValidator control is on the page and contains validation properties.
Security Note
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|---|
This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview. |
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.VB" %> <%@ Page language="VB" %> <!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>Custom CompareValidator - ControlPropertiesValid - VB.NET Example</title> </head> <body> <form id="Form1" method="post" runat="server"> <h3>Custom CompareValidator - ControlPropertiesValid - C# Example</h3> <asp:TextBox id="TextBox1" runat="server">123</asp:TextBox><br /> <aspSample:CustomCompareValidatorControlPropertiesValid id="CompareValidator1" runat="server" Display="Dynamic" ErrorMessage="The value of TextBox1 must be '456'." ControlToValidate="TextBox1" ValueToCompare="456" /><br /> <asp:Button id="Button1" runat="server" Text="Button" /> </form> </body> </html>
Imports System.Web Imports System.Security.Permissions Namespace Samples.AspNet.VB.Controls <AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _ Public NotInheritable Class CustomCompareValidatorControlPropertiesValid Inherits System.Web.UI.WebControls.CompareValidator Protected Overrides Function ControlPropertiesValid() As Boolean ' Determine whether the ControlToValidate is on the page and contains a validation properties. MyBase.CheckControlValidationProperty(Me.ControlToValidate, "ControlToValidate") ' If the control is visible, then control is valid and ready for validation. Dim control As System.Web.UI.Control = Me.FindControl(Me.ControlToValidate) If control.Visible = True Then Return True Else Return False End If End Function End Class End Namespace
Available since 1.1
