Page.IsCrossPagePostBack : Cross Page Posting « Page Lifecycle « ASP.NET Tutorial






index.aspx


<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
    public TextBox pp_TextBox1
    {
        get
        {
            return TextBox1;
        }
    }

    public Calendar myCalendar1
    {
        get
        {
            return Calendar1;
        }
    }

    protected void Button1_Click (object sender, System.EventArgs e)
    {
        Label1.Text = "Hello " + TextBox1.Text + "<br />" +
            "Date Selected: " + Calendar1.SelectedDate.ToShortDateString();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>First Page</title>
</head>
<body>
    <form id="form1" runat="server">
        Enter your name:<br />
        <asp:Textbox ID="TextBox1" Runat="server">
        </asp:Textbox>
        When do you want to fly?<br />
        <asp:Calendar ID="Calendar1" Runat="server"></asp:Calendar>
        <br />
        <asp:Button ID="Button1" Runat="server" Text="Submit page to itself" 
         OnClick="Button1_Click" />
        <asp:Button ID="Button2" Runat="server" Text="Submit page to NextPage.aspx"
         PostBackUrl="NextPage.aspx" />
        <asp:Label ID="Label1" Runat="server"></asp:Label>
    </form>
</body>
</html>

File: NextPage.aspx


<%@ Page Language="C#" %>
<%@ PreviousPageType VirtualPath="Default.aspx" %>

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

<script runat="server">    
    protected void Page_Load(object sender, System.EventArgs e)
    {
      if (Page.IsCrossPagePostBack) {
        Label1.Text = "Hello " + PreviousPage.myTextbox1.Text + "<br />" + 
           "Date Selected: " + 
           PreviousPage.myCalendar1.SelectedDate.ToShortDateString();
      }
      else
      {
         Response.Redirect("Default.aspx");
      }
    }    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Second Page</title>
</head>
<body>
    <form id="form1" runat="server">
        <asp:Label ID="Label1" Runat="server"></asp:Label>
    </form>
</body>
</html>








5.7.Cross Page Posting
5.7.1.New Cross-Page Posting
5.7.2.Exposing the values of the control from a Property
5.7.3.Page.IsCrossPagePostBack
5.7.4.Cross-page post (VB.net)
5.7.5.Page level property (VB.net)
5.7.6.PreviousPageType directive