BaseValidator.EnableClientScript Property (System.Web.UI.WebControls)

EnableClientScript Property

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This page is specific to

Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:

.NET Framework Class Library

BaseValidator..::.EnableClientScript Property

Updated: November 2007

Gets or sets a value indicating whether client-side validation is enabled.

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

Syntax

Visual Basic (Declaration)

<ThemeableAttribute(False)> _
Public Property EnableClientScript As Boolean

Visual Basic (Usage)

Dim instance As BaseValidator
Dim value As Boolean

value = instance.EnableClientScript

instance.EnableClientScript = value

[ThemeableAttribute(false)]
public bool EnableClientScript { get; set; }

Visual C++

[ThemeableAttribute(false)]
public:
property bool EnableClientScript {
    bool get ();
    void set (bool value);
}

/** @property */
/** @attribute ThemeableAttribute(false) */
public boolean get_EnableClientScript()
/** @property */
/** @attribute ThemeableAttribute(false) */
public  void set_EnableClientScript(boolean value)

JScript

public function get EnableClientScript () : boolean
public function set EnableClientScript (value : boolean)

ASP.NET

<asp:BaseValidator EnableClientScript="True|False" />

Property Value

Type: System..::.Boolean

true if client-side validation is enabled; otherwise, false. The default value is true.

Remarks

Use the EnableClientScript property to specify whether client-side validation is enabled.

Validation controls always perform validation on the server. They also have complete client-side implementation that allows DHTML-supported browsers (such as Microsoft Internet Explorer 4.0 and later) to perform validation on the client. Client-side validation enhances the validation process by checking user input before it is sent to the server. This allows errors to be detected on the client before the form is submitted, avoiding the round trip of information necessary for server-side validation.

By default, this value is set to true, which enables client-side validation if the browser supports it. You can disable client-side validation on a control-by-control basis. This is useful if dynamic updating on the client creates problems with the layout of the page, or if you want to execute some server code before validation takes place.

This property cannot be set by themes or style sheet themes. For more information, see ThemeableAttribute and ASP.NET Themes and Skins Overview.

Topic	Location
Walkthrough: Validating User Input in a Web Forms Page	Building ASP .NET Web Applications in Visual Studio
Walkthrough: Validating User Input in a Web Forms Page	Building Applications with Visual Web Developer

Examples

The following code example demonstrates how to use the EnableClientScript property to disable client-side validation so that the random numbers can be generated on the server.

Security Note:
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.

Visual Basic

<%@ Page Language="VB" AutoEventWireup="False" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Sub Button_Click(ByVal sender As Object, ByVal e As EventArgs) Handles SubmitButton.Click

    If Page.IsValid Then

      MessageLabel.Text = "Page submitted successfully."

    Else

      MessageLabel.Text = "There is an error on the page."

    End If

  End Sub

</script>

<html  >
  <head runat="server">
    <title>Validator Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <h3>Validator Example</h3>

      Enter a number from 1 to 10.
      <asp:textbox id="NumberTextBox" 
        runat="server"/>

      <asp:rangevalidator id="NumberCompareValidator" 
        controltovalidate="NumberTextBox"
        enableclientscript="False"  
        type="Integer"
        display="Dynamic" 
        errormessage="Please enter a value from 1 to 10."
        maximumvalue="10"
        minimumvalue="1"  
        text="*"
        runat="server"/>

      <asp:requiredfieldvalidator id="TextBoxRequiredValidator" 
        controltovalidate="NumberTextBox"
        enableclientscript="False"
        display="Dynamic" 
        errormessage="Please enter a value."
        text="*"
        runat="server"/>

      <br /><br />

      <asp:button id="SubmitButton"
        text="Submit"
        runat="server"/>

      <br /><br />

      <asp:label id="MessageLabel" 
        runat="server"/>

      <br /><br />

      <asp:validationsummary
        id="ErrorSummary"
        runat="server"/>

    </form>
  </body>
</html>

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void Button_Click(Object sender, EventArgs e) 
  {
    if (Page.IsValid)
    {
      MessageLabel.Text = "Page submitted successfully.";
    }
    else
    {
      MessageLabel.Text = "There is an error on the page.";
    }
  }

</script>

<html  >
  <head runat="server">
    <title>Validator Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <h3>Validator Example</h3>

      Enter a number from 1 to 10.
      <asp:textbox id="NumberTextBox" 
        runat="server"/>

      <asp:rangevalidator id="NumberCompareValidator" 
        controltovalidate="NumberTextBox"
        enableclientscript="False"  
        type="Integer"
        display="Dynamic" 
        errormessage="Please enter a value from 1 to 10."
        maximumvalue="10"
        minimumvalue="1"  
        text="*"
        runat="server"/>

      <asp:requiredfieldvalidator id="TextBoxRequiredValidator" 
        controltovalidate="NumberTextBox"
        enableclientscript="False"
        display="Dynamic" 
        errormessage="Please enter a value."
        text="*"
        runat="server"/>

      <br /><br />

      <asp:button id="SubmitButton"
        text="Submit"
        onclick="Button_Click"
        runat="server"/>

      <br /><br />

      <asp:label id="MessageLabel" 
        runat="server"/>

      <br /><br />

      <asp:validationsummary
        id="ErrorSummary"
        runat="server"/>

    </form>
  </body>
</html>

JScript

<%@ Page Language="JScript" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  function Button_Click(sender, e : EventArgs) 
  {
    if (Page.IsValid)
    {
      MessageLabel.Text = "Page submitted successfully.";
    }
    else
    {
      MessageLabel.Text = "There is an error on the page.";
    }
  }

</script>

<html  >
  <head runat="server">
    <title>Validator Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <h3>Validator Example</h3>

      Enter a number from 1 to 10.
      <asp:textbox id="NumberTextBox" 
        runat="server"/>

      <asp:rangevalidator id="NumberCompareValidator" 
        controltovalidate="NumberTextBox"
        enableclientscript="False"  
        type="Integer"
        display="Dynamic" 
        errormessage="Please enter a value from 1 to 10."
        maximumvalue="10"
        minimumvalue="1"  
        text="*"
        runat="server"/>

      <asp:requiredfieldvalidator id="TextBoxRequiredValidator" 
        controltovalidate="NumberTextBox"
        enableclientscript="False"
        display="Dynamic" 
        errormessage="Please enter a value."
        text="*"
        runat="server"/>

      <br /><br />

      <asp:button id="SubmitButton"
        text="Submit"
        onclick="Button_Click"
        runat="server"/>

      <br /><br />

      <asp:label id="MessageLabel" 
        runat="server"/>

      <br /><br />

      <asp:validationsummary
        id="ErrorSummary"
        runat="server"/>

    </form>
  </body>
</html>

Platforms

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

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information