HtmlInputText.OnPreRender Method

Raises the PreRender event.

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

protected public:
virtual void OnPreRender (
	EventArgs^ e
) override
protected void OnPreRender (
	EventArgs e
)
protected internal override function OnPreRender (
	e : EventArgs
)
Not applicable.

Parameters

e

An EventArgs that contains the event data.

The OnPreRender method is called just prior to rendering the HtmlInputText control. The OnPreRender method is used primarily by control developers extending the functionality of the HtmlInputText control.

The following code example demonstrates how to override the OnPreRender method so that it sets the MaxLength property to 30 characters in a custom HtmlInputText server control.

No code example is currently available or this language may not be supported.
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" 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 HtmlInputText - OnPreRender - VJ# Example</title>
    <script runat="server">
    void Page_Load(Object sender, EventArgs e) 
    {
        if (!get_Page().get_IsPostBack()) {
            HtmlInputText1.set_Value("Hello HtmlInputText World.");
        }
    } //Page_Load

    void HtmlInputText1_ServerChange(Object sender, System.EventArgs e)
    {
        // Diplay the value of the selected HtmlInputText control.
        System.Web.UI.HtmlControls.HtmlInputText htmlInputText1 = 
            (System.Web.UI.HtmlControls.HtmlInputText)sender;
        Div1.set_InnerHtml("You change the above text to:<br />" 
            + htmlInputText1.get_Value());
    } //HtmlInputText1_ServerChange
    </script>
    </head>
    <body>
        <form id="Form1" method="post" runat="server">
            <h3>Custom HtmlInputText - OnPreRender - VJ# Example</h3>
      <p>Make a change to the text, then press the Enter key.<br />
        <aspSample:CustomHtmlInputTextOnPreRender 
          id="HtmlInputText1" 
          name="HtmlInputText1" 
          runat="server" 
          type="text"
          size="45"
          style="WIDTH: 305px; HEIGHT: 22px" 
          onserverchange="HtmlInputText1_ServerChange">
      </p>
      <br />
      <div 
        id="Div1" 
        runat="server" 
        style="DISPLAY: inline; WIDTH: 256px; HEIGHT: 15px" />
          
        </form>
    </body>
</html>

No code example is currently available or this language may not be supported.
package Samples.AspNet.JSL.Controls;

public class CustomHtmlInputTextOnPreRender
    extends System.Web.UI.HtmlControls.HtmlInputText
{
    protected void OnPreRender(System.EventArgs e)
    {
        // Call the base's OnPreRender method.
        super.OnPreRender(e);
        // Set the HtmlInputText's MaxLength to 30 chars.
        this.set_MaxLength(30);
    } //OnPreRender
} //CustomHtmlInputTextOnPreRender

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

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