Export (0) Print
Expand All

CustomValidator.ControlPropertiesValid Method

This method supports the .NET Framework infrastructure and is not intended to be used directly from your code.

Checks the properties of the control for valid values.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

protected override bool ControlPropertiesValid ()
protected boolean ControlPropertiesValid ()
protected override function ControlPropertiesValid () : boolean
Not applicable.

Return Value

true if the control properties are valid; otherwise, false.

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 ControlToValidate property of the CustomValidator control is on the page and contains validation properties.

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet" Assembly="Samples.AspNet.CS" %>
<%@ 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>Custom CustomValidator - ControlPropertiesValid - C# Example</title>
    <script runat="server">
    void CustomValidator1_ServerValidate(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" method="post" runat="server">
    <h3>Custom CustomValidator - ControlPropertiesValid - C# Example</h3>
    
    <asp:Label id="Label1" runat="server" Text="Enter an even number:" AssociatedControlID="TextBox1" /><br />
    
    <asp:TextBox id="TextBox1" runat="server" />&nbsp;
    
    <aspSample:CustomCustomValidatorControlPropertiesValid 
      id="Customvalidator1" 
      runat="server" 
      ControlToValidate="TextBox1" 
      Display="Static" 
      ErrorMessage="Not an even number!" 
      OnServerValidate="CustomValidator1_ServerValidate" /><br /><br />
    
    <asp:Button id="Button1" runat="server" Text="Validate" />
  </form>
</body>
</html>

	...

using System.Web;
using System.Security.Permissions;

namespace Samples.AspNet
{
    [AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
    public sealed class CustomCustomValidatorControlPropertiesValid : System.Web.UI.WebControls.CustomValidator
    {
        protected override bool ControlPropertiesValid()
        {
            string controlToValidate = this.ControlToValidate;

            // Determine whether the ControlToValidate is on the page 
            // and contains a valid validation property. 
            if (controlToValidate.Length > 0) 
            {
            base.CheckControlValidationProperty(controlToValidate, "ControlToValidate");
            }

            // If the control is visible, then control is valid 
            // and is ready for validation.
            System.Web.UI.Control control = this.FindControl(controlToValidate);
            return control.Visible;
        }
    }
}

<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet" Assembly="Samples.AspNet.JSL" %>
<%@ Page Language="VJ#" 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>Custom CustomValidator - ControlPropertiesValid - VJ# Example</title>
    <script runat="server">
    void CustomValidator1_ServerValidate(Object source, 
        ServerValidateEventArgs args) 
    {
        try {
            // Test whether the value entered into the text box is even.
            int i = Int32.Parse(args.get_Value());
            args.set_IsValid((i%2) == 0);
        }
        catch(Exception ex) {
            args.set_IsValid(false);
        }
    } //CustomValidator1_ServerValidate
    </script>
  </head>
<body>
  <form id="Form1" method="post" runat="server">
    <h3>Custom CustomValidator - ControlPropertiesValid - VJ# Example</h3>
    
    <asp:Label id="Label1" runat="server" Text="Enter an even number:"
      AssociatedControlID="TextBox1" /><br />
    
    <asp:TextBox id="TextBox1" runat="server" />&nbsp;
    
    <aspSample:CustomCustomValidatorControlPropertiesValid 
      id="Customvalidator1" 
      runat="server" 
      ControlToValidate="TextBox1" 
      Display="Static" 
      ErrorMessage="Not an even number!" 
      OnServerValidate="CustomValidator1_ServerValidate" /><br /><br />
    
    <asp:Button id="Button1" runat="server" Text="Validate" />
  </form>
</body>
</html>

	...

package Samples.AspNet;

public class CustomCustomValidatorControlPropertiesValid
    extends System.Web.UI.WebControls.CustomValidator
{
    protected boolean ControlPropertiesValid()
    {
        String controlToValidate = this.get_ControlToValidate();
        // Determine whether the ControlToValidate is on the page 
        // and contains a valid validation property. 
        if (controlToValidate.get_Length() > 0) {
            super.CheckControlValidationProperty(controlToValidate,
                "ControlToValidate");
        }
        // If the control is visible, then control is valid 
        // and is ready for validation.
        System.Web.UI.Control control = this.FindControl(controlToValidate);
        return control.get_Visible();
    } //ControlPropertiesValid
} //CustomCustomValidatorControlPropertiesValid

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

Community Additions

ADD
Show:
© 2014 Microsoft