ClientScript.RegisterClientScriptBlock

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Wizard ID="Wizard1" runat="server">
            <WizardSteps>
                <asp:WizardStep runat="server" Title="Step 1">
                    &nbsp;<asp:TextBox ID="TextBox1" runat="server" ></asp:TextBox>
                    <asp:Button ID="Button1"
                        runat="server" Text="Button" OnClientClick="Test()"/>
                    &nbsp;
                </asp:WizardStep>
                <asp:WizardStep runat="server" Title="Step 2">
                </asp:WizardStep>
            </WizardSteps>
        </asp:Wizard>
    
    </div>
    </form>
</body>
</html>

File: Default.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    string JScript=
      "<script language=javascript> \n" +
      "<!--  \n" +
      "function Test()\n" +
      "{ \n" +
      "var what = document.forms['form1']; \n" +
      "if (!what) { \n" +
      "what = document.form1; \n" +
      "} \n" +
      "if ( what." + this.TextBox1.ClientID + ".value=='' ) \n" +
      "{ \n" +
      "alert('You Entered: nothing!');\n" +
      "}\n" +
      "else\n" +
      "{\n" +
      "alert('You Entered: ' + what." + this.TextBox1.ClientID + ".value);" +
      "}\n" +
      "}\n" +
      "//--></script>\n"; 
    ClientScript.RegisterClientScriptBlock(typeof(Page),"Test",JScript);
    }
}
ClientScript.RegisterClientScriptBlock : ClientScript « Ajax « ASP.Net

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