Post data to another page using the cross-page posting features of ASP.NET 2.0 and 3.5.


<%@ 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>Simple cross-page posting</title>
</head>
<body>
    <div id="pageContent">
        <form id="form1" runat="server">
            <asp:MultiView ID="MultiView1" runat="server">
                <asp:View runat="server" ID="ChooseActionView">
                    <h3>
                    I want to
                    <asp:DropDownList ID="DropDownList1" 
                                      runat="server" 
                                      AutoPostBack="True" 
                                      OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
                        <asp:ListItem>Hire </asp:ListItem>
                        <asp:ListItem>Buy </asp:ListItem>
                        <asp:ListItem>Spy </asp:ListItem>
                    </asp:DropDownList>
                    </h3>            
                </asp:View>
                <asp:View runat="server" ID="ShowResultsView">
                    <asp:Label runat="server" ID="Msg" /><br /><br />
                    <asp:LinkButton ID="LinkButton1" 
                                    runat="server" 
                                    OnClick="LinkButton1_Click">Choose an action</asp:LinkButton>
                </asp:View>
            </asp:MultiView>

            <hr />
            <h3>Post to another page</h3>
            <p>(<strong>NB:</strong> Try typing <em>AAA</em>)</p>
            Name:
            <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
            <asp:RequiredFieldValidator ID="RequiredFieldValidator1" 
                                        runat="server" 
                                        ControlToValidate="TextBox1"
                Text="*" />
            <asp:CustomValidator 
                 ID="CustomValidator1" 
                 runat="server" 
                 Text="*" 
                 ControlToValidate="TextBox1" 
                 OnServerValidate="CustomValidator1_ServerValidate" />
            <asp:Button ID="Button1" 
                        runat="server" 
                        Text="Apply request..." 
                        OnClick="Button1_Click" 
                        PostBackUrl="NextPage.aspx" />
            <br />
        </form>
    </div>
</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.HtmlControls;
using System.IO;


public partial class Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    if (!IsPostBack)
      MultiView1.ActiveViewIndex = 0;
    }
  protected void Button1_Click(object sender, EventArgs e)
  {
    Response.Write("This is NOT unreachable code");
    StreamWriter w = new StreamWriter("test.txt");
    w.WriteLine("This is NOT unreachable code");
    w.Close();
  }
  protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
  {
    Msg.Text = String.Format("Congratulations! You're going to <b>{0}</b>", DropDownList1.SelectedItem.Text);
    MultiView1.ActiveViewIndex = 1;
  }

  protected void LinkButton1_Click(object sender, EventArgs e)
  {
    MultiView1.ActiveViewIndex = 0;
  }

    protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
    {
        args.IsValid = false;
        if (String.Equals(args.Value, "AAA"))
            args.IsValid = true;
    }
}

File: NextPage.aspx

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

<!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>Welcome to the guru's page</title>
</head>
<body>
   
    <div id="pageContent">
        <form id="form1" runat="server">        
            <h2>This is the 
                <asp:Label ID="GuruName" runat="server" ForeColor="blue" />
                home page. Thank you for requesting to 
                <asp:Label ID="GuruAction" runat="server" ForeColor="blue" />
            </h2>
        </form>
    </div>
</body>
</html>

File: NextPage.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.HtmlControls;


public partial class NextPage : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    if (PreviousPage == null) 
    {
      Response.Write("Sorry, you can only invoke me through cross-page posting.");
      Response.End();
      return;
    }

        if (!PreviousPage.IsValid)
        {
            Response.Write("Sorry, the original page contains invalid input.");
            Response.End();
            return;
        }
    DropDownList dd = (DropDownList) PreviousPage.FindControl("DropDownList1");
    string action = dd.SelectedItem.Text;
    GuruAction.Text = action;

    TextBox txt = (TextBox) PreviousPage.FindControl("TextBox1");
    GuruName.Text = txt.Text;
    }
}
Related examples in the same category

1.	Simple cross page posting
2.	The target page binds to the previous-page class type.
3.	Response.Redirect
4.	Access previous page
5.	Find control from previous page
6.	Cross Page Posting Post Back Properties
Post data to another page using the cross-page posting features of ASP.NET 2.0 and 3.5. : Cross page posting « Page « ASP.Net

Related examples in the same category
