ASP.Net/Page/Cross page posting

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Access previous page

   <source lang="csharp">

<%@ Page Language="C#" AutoEventWireup="true" 

 CodeFile="Default.aspx.cs" 
 Inherits="Default_aspx" %>

<!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>Cross-Page Posting</title>

</head> <body> 

   <form id="form1" runat="server">

Cross-Page Posting

    Select your favorite activity: 
    <asp:DropDownList ID="ddlActivity" runat="server" AutoPostBack="true">
     <asp:ListItem Text="Eating" />
     <asp:ListItem Text="Sleeping" />
     <asp:ListItem Text="Programming" />
    </asp:DropDownList>
    

    

    

    <asp:Button ID="btnServerTransfer" runat="server" 
     Text="Server.Transfer" 
     OnClick="btnServerTransfer_Click" />
    <asp:Button ID="btnRedirect" runat="server" 
     Text="Response.Redirect" 
     OnClick="btnRedirect_Click" />
    <asp:Button ID="btnCrossPage" runat="server" 
     Text="Cross-Page Post" 
     PostBackUrl="NextPage.aspx" />
   

    <asp:Label ID="lblMessage" runat="server" />
    
   

   </form>

</body> </html> File: Default.aspx.cs using System; using System.Data; using System.Configuration; 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; using System.Threading; // necessary for ThreadAbortException public partial class Default_aspx : System.Web.UI.Page { 

   protected void Page_Load(object sender, EventArgs e)
   {
    lblMessage.Text = "";
   }
 public DropDownList FavoriteActivity
 {
   get { return ddlActivity; }
 }

 protected void btnServerTransfer_Click(object sender, EventArgs e)
  {
    try
    {
      Server.Transfer("NextPage.aspx");
    }
    catch (ThreadAbortException ex)
    {
    }
    catch (Exception ex)
    {
      lblMessage.Text = "Exception: " + ex.Message;
    }
  }
 protected void btnRedirect_Click(object sender, EventArgs e)
  {
    try
    {
      Response.Redirect("NextPage.aspx");
    }
    catch (Exception ex)
    {
      lblMessage.Text = "Exception: " + ex.Message;
    }
  }
}

File: NextPage.aspx <%@ Page Language="C#" AutoEventWireup="true" CodeFile="NextPage.aspx.cs" Inherits="NextPage_aspx" %> <%@ PreviousPageType VirtualPath="~/Default.aspx" %> <!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>Target Page</title>

</head> <body> 

   <form id="form1" runat="server">

Target Page.

   Your favorite activity is 
    <asp:Label ID="lblActivity" runat="server" Text="unknown" />
   

   </form>

</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.WebControls.WebParts; using System.Web.UI.HtmlControls; public partial class NextPage_aspx : System.Web.UI.Page { 

   protected void Page_Load(object sender, EventArgs e)
   {
    lblActivity.Text = PreviousPage.FavoriteActivity.SelectedItem.ToString();
   }

} 

</source>


Cross Page Posting Post Back Properties

   <source lang="csharp">

<%@ Page Language="C#" AutoEventWireup="true" 

 CodeFile="Default.aspx.cs" 
 Inherits="Default_aspx" %>

<!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>Cross-Page Posting</title>

</head> <body> 

   <form id="form1" runat="server">

Cross-Page Posting

    Select your favorite activity: 
    <asp:DropDownList ID="ddlFavoriteActivity" runat="server" AutoPostBack="true">
     <asp:ListItem Text="Eating" />
     <asp:ListItem Text="Sleeping" />
     <asp:ListItem Text="Programming" />
    </asp:DropDownList>
    

    

    

    <asp:Button ID="btnServerTransfer" runat="server" 
     Text="Server.Transfer" 
     OnClick="btnServerTransfer_Click" />
    <asp:Button ID="btnRedirect" runat="server" 
     Text="Response.Redirect" 
     OnClick="btnRedirect_Click" />
    <asp:Button ID="btnCrossPage" runat="server" 
     Text="Cross-Page Post" 
     PostBackUrl="NextPage.aspx" />
   

   

   IsPostBack:    
    <asp:Label ID="lblIsPostBack" runat="server" Text="not defined" />
    

   IsCrossPagePostBack:
    <asp:Label ID="lblIsCrossPagePostBack" runat="server" Text="not defined" />
    

   PreviousPage:
    <asp:Label ID="lblPreviousPage" runat="server" Text="not defined" />

   </form>

</body> </html> File: Default.aspx.cs using System; using System.Data; using System.Configuration; 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; using System.Threading; // necessary for ThreadAbortException public partial class Default_aspx : System.Web.UI.Page { 

   protected void Page_Load(object sender, EventArgs e)
   {
    lblIsPostBack.Text = IsPostBack.ToString();
    lblIsCrossPagePostBack.Text = IsCrossPagePostBack.ToString();
    if (Page.PreviousPage != null)
      lblPreviousPage.Text = Page.PreviousPage.Title;
   }
 protected void btnServerTransfer_Click(object sender, EventArgs e)
  {
    Server.Transfer("NextPage.aspx");
  }
 protected void btnRedirect_Click(object sender, EventArgs e)
  {
    Response.Redirect("NextPage.aspx");
  }

} File: NextPage.aspx <%@ Page Language="C#" AutoEventWireup="true" CodeFile="NextPage.aspx.cs" Inherits="NextPage_aspx" %> <!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>Target Page</title>

</head> <body> 

   <form id="form1" runat="server">

Target Page.

   Your favorite activity is
    <asp:Label ID="lblActivity" runat="server" Text="unknown" />
   

   

   IsPostBack:    
    <asp:Label ID="lblIsPostBack" runat="server" Text="not defined" />
    

   IsCrossPagePostBack:
    <asp:Label ID="lblIsCrossPagePostBack" runat="server" Text="not defined" />
    

   PreviousPage:
    <asp:Label ID="lblPreviousPage" runat="server" Text="not defined" />
    

   Previous Page IsPostBack:
    <asp:Label ID="lblPreviousPageIsPostBack" runat="server" Text="not defined" />
    

   Previous Page IsCrossPagePostBack:
    <asp:Label ID="lblPreviousPageIsCrossPagePostBack" runat="server" Text="not defined" />

   </form>

</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.WebControls.WebParts; using System.Web.UI.HtmlControls; public partial class NextPage_aspx : System.Web.UI.Page { 

   protected void Page_Load(object sender, EventArgs e)
   {
    if (Page.PreviousPage != null)
    {
      DropDownList ddl = (DropDownList)Page.PreviousPage.FindControl("ddlFavoriteActivity");
      if (ddl != null)
        lblActivity.Text = ddl.SelectedItem.ToString() + " (late-bound)";
    }
    lblIsPostBack.Text = IsPostBack.ToString();
    lblIsCrossPagePostBack.Text = IsCrossPagePostBack.ToString();
    if (Page.PreviousPage != null)
    {
      lblPreviousPage.Text = Page.PreviousPage.Title;
      lblPreviousPageIsPostBack.Text = Page.PreviousPage.IsPostBack.ToString();
      lblPreviousPageIsCrossPagePostBack.Text = Page.PreviousPage.IsCrossPagePostBack.ToString();
    }
   }

} 

</source>


Find control from previous page

   <source lang="csharp">

<%@ Page Language="C#" AutoEventWireup="true" 

 CodeFile="Default.aspx.cs" 
 Inherits="Default_aspx" %>

<!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>Cross-Page Posting</title>

</head> <body> 

   <form id="form1" runat="server">

Cross-Page Posting

    Select your favorite activity: 
    <asp:DropDownList ID="ddlFavoriteActivity" runat="server" AutoPostBack="true">
     <asp:ListItem Text="Eating" />
     <asp:ListItem Text="Sleeping" />
     <asp:ListItem Text="Programming" />
     <asp:ListItem Text="Watching TV" />
     <asp:ListItem Text="Sex" />
     <asp:ListItem Text="Skiing" />
     <asp:ListItem Text="Bicycling" />
    </asp:DropDownList>
    

    

    

    <asp:Button ID="btnServerTransfer" runat="server" 
     Text="Server.Transfer" 
     OnClick="btnServerTransfer_Click" />
    <asp:Button ID="btnRedirect" runat="server" 
     Text="Response.Redirect" 
     OnClick="btnRedirect_Click" />
    <asp:Button ID="btnCrossPage" runat="server" 
     Text="Cross-Page Post" 
     PostBackUrl="NextPage.aspx" />

   </form>

</body> </html> File: Default.aspx.cs using System; using System.Data; using System.Configuration; 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; using System.Threading; // necessary for ThreadAbortException public partial class Default_aspx : System.Web.UI.Page { 

   protected void Page_Load(object sender, EventArgs e)
   {
   }
 protected void btnServerTransfer_Click(object sender, EventArgs e)
  {
    Server.Transfer("NextPage.aspx");
  }
 protected void btnRedirect_Click(object sender, EventArgs e)
  {
    Response.Redirect("NextPage.aspx");
  }
}

File: NextPage.aspx <%@ Page Language="C#" AutoEventWireup="true" CodeFile="NextPage.aspx.cs" Inherits="NextPage_aspx" %> <!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>Target Page</title>

</head> <body> 

   <form id="form1" runat="server">

Target Page.

   Your favorite activity is
    <asp:Label ID="lblActivity" runat="server" Text="unknown" />
   

   </form>

</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.WebControls.WebParts; using System.Web.UI.HtmlControls; public partial class NextPage_aspx : System.Web.UI.Page { 

   protected void Page_Load(object sender, EventArgs e)
   {
    if (Page.PreviousPage != null)
    {
      DropDownList ddl = (DropDownList)Page.PreviousPage.FindControl("ddlFavoriteActivity");
      if (ddl != null)
        lblActivity.Text = ddl.SelectedItem.ToString() + " (late-bound)";
    }
   }

} 

</source>


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

   <source lang="csharp">

<%@ 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> 

       <form id="form1" runat="server">
           <asp:MultiView ID="MultiView1" runat="server">
               <asp:View runat="server" ID="ChooseActionView">

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>

               </asp:View>
               <asp:View runat="server" ID="ShowResultsView">
                   <asp:Label runat="server" ID="Msg" />


                   <asp:LinkButton ID="LinkButton1" 
                                   runat="server" 
                                   OnClick="LinkButton1_Click">Choose an action</asp:LinkButton>
               </asp:View>
           </asp:MultiView>

Post to another page

(NB: Try typing AAA)

           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" />
           

       </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.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 {0}", 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> 

       <form id="form1" runat="server">

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" />

       </form>

</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;
   }

} 

</source>


Response.Redirect

   <source lang="csharp">

<%@ Page Language="C#" AutoEventWireup="true" 

 CodeFile="Default.aspx.cs" 
 Inherits="Default_aspx" %>

<!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>Cross-Page Posting</title>

</head> <body> 

   <form id="form1" runat="server">

Cross-Page Posting

    Select your favorite activity: 
    <asp:DropDownList ID="ddlActivity" runat="server" AutoPostBack="true">
     <asp:ListItem Text="Eating" />
     <asp:ListItem Text="Sleeping" />
     <asp:ListItem Text="Programming" />
     <asp:ListItem Text="Watching TV" />
     <asp:ListItem Text="Sex" />
     <asp:ListItem Text="Skiing" />
     <asp:ListItem Text="Bicycling" />
    </asp:DropDownList>
    

    

    

    <asp:Button ID="btnServerTransfer" runat="server" 
     Text="Server.Transfer" 
     OnClick="btnServerTransfer_Click" />
    <asp:Button ID="btnRedirect" runat="server" 
     Text="Response.Redirect" 
     OnClick="btnRedirect_Click" />
    <asp:Button ID="btnCrossPage" runat="server" 
     Text="Cross-Page Post" 
     PostBackUrl="NextPage.aspx" />
   

    <asp:Label ID="lblMessage" runat="server" />
    
   

   </form>

</body> </html> File: Default.aspx.cs using System; using System.Data; using System.Configuration; 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; using System.Threading; public partial class Default_aspx : System.Web.UI.Page { 

   protected void Page_Load(object sender, EventArgs e)
   {
    lblMessage.Text = "";
   }
 public DropDownList FavoriteActivity
 {
   get { return ddlActivity; }
 }

 protected void btnServerTransfer_Click(object sender, EventArgs e)
  {
    try
    {
      Server.Transfer("NextPage.aspx");
    }
    catch (ThreadAbortException ex)
    {
    }
    catch (Exception ex)
    {
      lblMessage.Text = "Exception: " + ex.Message;
    }
  }
 protected void btnRedirect_Click(object sender, EventArgs e)
  {
    try
    {
      Response.Redirect("NextPage.aspx");
    }
    catch (Exception ex)
    {
      lblMessage.Text = "Exception: " + ex.Message;
    }
  }
}

File: NextPage.aspx <%@ Page Language="C#" AutoEventWireup="true" CodeFile="NextPage.aspx.cs" Inherits="NextPage_aspx" %> <%@ PreviousPageType VirtualPath="~/Default.aspx" %> <!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>Target Page</title>

</head> <body> 

   <form id="form1" runat="server">

Target Page.

   Your favorite activity is 
    <asp:Label ID="lblActivity" runat="server" Text="unknown" />
   

   </form>

</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.WebControls.WebParts; using System.Web.UI.HtmlControls; public partial class NextPage_aspx : System.Web.UI.Page { 

   protected void Page_Load(object sender, EventArgs e)
   {
    lblActivity.Text = PreviousPage.FavoriteActivity.SelectedItem.ToString();
   }

} 

</source>


Simple cross page posting

   <source lang="csharp">

<%@ Page Language="C#" AutoEventWireup="true" 

 CodeFile="Default.aspx.cs" 
 Inherits="Default_aspx" %>

<!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>Cross-Page Posting</title>

</head> <body> 

   <form id="form1" runat="server">

Cross-Page Posting

    <asp:Button ID="btnServerTransfer" 
                runat="server" 
              Text="Server.Transfer" 
              OnClick="btnServerTransfer_Click" />
    <asp:Button ID="btnRedirect" 
                runat="server" 
              Text="Response.Redirect" 
              OnClick="btnRedirect_Click" />
    <asp:Button ID="btnCrossPage" 
                runat="server" 
              Text="Cross-Page Post" 
              PostBackUrl="NextPage.aspx" />

   </form>

</body> </html> File: Default.aspx.cs using System; using System.Data; using System.Configuration; 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_aspx : System.Web.UI.Page { 

 protected void btnServerTransfer_Click(object sender, EventArgs e) {
    Server.Transfer("NextPage.aspx");
   }
 protected void btnRedirect_Click(object sender, EventArgs e)
  {
    Response.Redirect("NextPage.aspx");
  }

} File: NextPage.aspx <%@ Page Language="C#" %> <!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>Target Page</title>

</head> <body> 

   <form id="form1" runat="server">

Target Page

   </form>

</body> </html> 

</source>


The target page binds to the previous-page class type.

   <source lang="csharp">

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

   Inherits="DefaultWithType"%>

<!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>Cross-page posting with type information</title>

</head> <body> 

       <form id="form1" runat="server">
           <asp:MultiView ID="MultiView1" runat="server">
               <asp:View runat="server" ID="ChooseActionView">

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>

               </asp:View>
               <asp:View runat="server" ID="ShowResultsView">
                   <asp:Label runat="server" ID="Msg" />


                   <asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click">Choose an action</asp:LinkButton>
               </asp:View>
           </asp:MultiView>

Post to another page

           Name:
           <asp:TextBox ID="textBox1" runat="server"></asp:TextBox>
           <asp:Button ID="Button1" runat="server" Text="Apply request..." OnClick="Button1_Click" 
               PostBackUrl="NextPage.aspx" />
           

       </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 DefaultWithType : 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)
 {
 }
 protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
 {
   Msg.Text = String.Format("Congratulations! You"re going to {0}", DropDownList1.SelectedItem.Text);
   MultiView1.ActiveViewIndex = 1;
 }
 protected void LinkButton1_Click(object sender, EventArgs e)
 {
   MultiView1.ActiveViewIndex = 0;
 }
 
 public DropDownList DropDownList1
 {
   get { return dropDownList1; }
 }
 public TextBox TextBox1
 {
   get { return textBox1; }
 }

} File: NextPage.aspx <%@ Page Language="C#" AutoEventWireup="true" CodeFile="NextPage.aspx.cs" 

   Inherits="NextPage" %>

<%@ PreviousPageType VirtualPath="Default.aspx" %> <!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> 

       <form id="form1" runat="server">

This is the <asp:Label ID="GuruName" runat="server" ForeColor="red" /> home page. Thank you for requesting to <asp:Label ID="GuruAction" runat="server" ForeColor="red" />

       </form>

</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;
   }
   string action = PreviousPage.DropDownList1.SelectedItem.Text;
   GuruAction.Text = action;
   GuruName.Text = PreviousPage.TextBox1.Text;
   }

} 

</source>
Источник — «http://nfex.ru/index.php?title=ASP.Net/Page/Cross_page_posting&oldid=2274»