Mega Code Archive

 
Categories / ASP.Net Tutorial / Page Lifecycle
 

Get previous page (C#)

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs"  Inherits="CrossPage1" %> <!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>CrossPage1</title> </head> <body>     <form id="form1" runat="server" >     <div>         First Name:         <asp:TextBox ID="txtFirstName" runat="server"></asp:TextBox>         <br />         Last Name:         <asp:TextBox ID="txtLastName" runat="server"></asp:TextBox>         <br />         <asp:Button runat="server" ID="cmdPost"                  PostBackUrl="NextPage.aspx" Text="Cross-Page Postback" /><br />         <asp:Button runat="server" ID="cmdTransfer" Text="Manual Transfer" OnClick="cmdTransfer_Click" Visible="False" />     </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 CrossPage1 : System.Web.UI.Page {     protected void Page_Load(object sender, EventArgs e)     {     if (Request.QueryString["err"] != null)       Page.Validate();     }   protected void cmdTransfer_Click(object sender, EventArgs e)   {     Server.Transfer("NextPage.aspx", true);   }     public string FullName     {         get { return txtFirstName.Text + " " + txtLastName.Text; }     } } File: NextPage.aspx <%@ Page Language="C#" AutoEventWireup="true" CodeFile="NextPage.aspx.cs" Inherits="CrossPage2" %> <!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:Label ID="lblInfo" runat="server"></asp:Label></div>     </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 CrossPage2 : System.Web.UI.Page {     protected void Page_Load(object sender, EventArgs e)     {         if (PreviousPage != null)         {             lblInfo.Text = "You came from a page titled " +                 PreviousPage.Title + "<br />";             CrossPage1 prevPage = PreviousPage as CrossPage1;             if (prevPage != null)             {                 lblInfo.Text += "You typed in this: " + prevPage.FullName +                   "<br />";             }         }     } }