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BaseValidator.EnableClientScript Property

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

[Visual Basic]
Public Property EnableClientScript As Boolean
[C#]
public bool EnableClientScript {get; set;}
[C++]
public: __property bool get_EnableClientScript();
public: __property void set_EnableClientScript(bool);
[JScript]
public function get EnableClientScript() : Boolean;
public function set EnableClientScript(Boolean);

Property Value

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 allow DHTML supported browsers (such as 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.

Example

[Visual Basic, C#, JScript] The following example demonstrates how to use the EnableClientScript property to disable client-side validation so that the random numbers can be generated on the server.

[Visual Basic] 
<%@ Page Language="VB" AutoEventWireup="True" %>

<html>
<head>
   <script runat="server">
 
      Sub Button_Click(sender As Object, e As EventArgs) 

         Dim rand_number As Random = New Random()

         Compare1.ValueToCompare = rand_number.Next(1, 10).ToString()
         Compare1.Validate()
 
         If Page.IsValid Then 

            lblOutput.Text = "You guessed correctly!!"
         
         Else 
         
            lblOutput.Text = "You guessed poorly"
         
         End If

         lblOutput.Text += "<br><br>" & "The number is: " & Compare1.ValueToCompare

      End Sub
 
   </script>
 
</head>
<body>
 
   <form runat=server>

      <h3>Validator Example</h3>

      <h5>Pick a number between 1 and 10:</h5>
     
      <asp:TextBox id="TextBox1" 
           runat="server"/>

      <asp:CompareValidator id="Compare1" 
           ControlToValidate="TextBox1"
           ValueToCompare="0"
           EnableClientScript="False"  
           Type="Integer"
           Display="Dynamic" 
           ErrorMessage="Incorrect guess!!"
           Text="*"
           runat="server"/>

      <asp:RequiredFieldValidator id="Require1" 
           ControlToValidate="TextBox1"
           EnableClientScript="False"
           Display="Dynamic" 
           ErrorMessage="No number entered!!"
           Text="*"
           runat="server"/>

      <br><br>

      <asp:Button id="Button1"
           Text="Submit"
           OnClick="Button_Click"
           runat="server"/>
 
      <br><br>
       
      <asp:Label id="lblOutput" 
           Font-Name="verdana" 
           Font-Size="10pt" 
           runat="server"/>

      <br><br>

      <asp:ValidationSummary
           id="Summary1"
           runat="server"/>
 
   </form>
 
</body>
</html>


[C#] 
<%@ Page Language="C#" AutoEventWireup="True" %>

<html>
<head>
   <script runat="server">
 
      void Button_Click(Object sender, EventArgs e) 
      {

         Random rand_number = new Random();

         Compare1.ValueToCompare = rand_number.Next(1, 10).ToString();
         Compare1.Validate();
 
         if (Page.IsValid) 
         {
            lblOutput.Text = "You guessed correctly!!";
         }
         else 
         {
            lblOutput.Text = "You guessed poorly";
         }

         lblOutput.Text += "<br><br>" + "The number is: " + Compare1.ValueToCompare;

      }
 
   </script>
 
</head>
<body>
 
   <form runat=server>

      <h3>Validator Example</h3>

      <h5>Pick a number between 1 and 10:</h5>
     
      <asp:TextBox id="TextBox1" 
           runat="server"/>

      <asp:CompareValidator id="Compare1" 
           ControlToValidate="TextBox1"
           ValueToCompare="0"
           EnableClientScript="False"  
           Type="Integer"
           Display="Dynamic" 
           ErrorMessage="Incorrect guess!!"
           Text="*"
           runat="server"/>

      <asp:RequiredFieldValidator id="Require1" 
           ControlToValidate="TextBox1"
           EnableClientScript="False"
           Display="Dynamic" 
           ErrorMessage="No number entered!!"
           Text="*"
           runat="server"/>

      <br><br>

      <asp:Button id="Button1"
           Text="Submit"
           OnClick="Button_Click"
           runat="server"/>
 
      <br><br>
       
      <asp:Label id="lblOutput" 
           Font-Name="verdana" 
           Font-Size="10pt" 
           runat="server"/>

      <br><br>

      <asp:ValidationSummary
           id="Summary1"
           runat="server"/>
 
   </form>
 
</body>
</html>


[JScript] 
<%@ Page Language="JScript" AutoEventWireup="True" %>

<html>
<head>
   <script language="JScript" runat="server">
 
      function Button_Click(sender, e : EventArgs) 
      {

         var rand_number : Random  = new Random();

         Compare1.ValueToCompare = rand_number.Next(1, 10).ToString();
         Compare1.Validate();
 
         if (Page.IsValid) 
         {
            lblOutput.Text = "You guessed correctly!!";
         }
         else 
         {
            lblOutput.Text = "You guessed poorly";
         }

         lblOutput.Text += "<br><br>" + "The number is: " + Compare1.ValueToCompare;

      }
 
   </script>
 
</head>
<body>
 
   <form runat=server>

      <h3>Validator Example</h3>

      <h5>Pick a number between 1 and 10:</h5>

      <asp:RequiredFieldValidator id="Require1" 
           ControlToValidate="TextBox1"
           Type="Integer" 
           ErrorMessage="No number entered!!"
           Text="*"
           runat="server"/>
     
      <asp:TextBox id="TextBox1" 
           runat="server"/>

      <asp:CompareValidator id="Compare1" 
           ControlToValidate="TextBox1"
           ValueToCompare="0"
           EnableClientScript="False"  
           Type="Integer" 
           ErrorMessage="Incorrect guess!!"
           Text="*"
           runat="server"/>

      <br><br>

      <asp:Button id="Button1"
           Text="Submit"
           OnClick="Button_Click"
           runat="server"/>
 
      <br><br>
       
      <asp:Label id="lblOutput" 
           Font-Name="verdana" 
           Font-Size="10pt" 
           runat="server"/>

      <br><br>

      <asp:ValidationSummary
           id="Summary1"
           runat="server"/>
 
   </form>
 
</body>
</html>

[C++] No example is available for C++. To view a Visual Basic, C#, or JScript example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 2000, Windows XP Professional, Windows Server 2003 family

See Also

BaseValidator Class | BaseValidator Members | System.Web.UI.WebControls Namespace

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