Folks!
The following is a "Hello World" kind of code for ViewState. I just want to know how to retain the ViewState 1) while Page Refresh when using UpdatePanel and also 2) While I reverting back to the page after round trip when using UpdatePanel?
In the following code snippet the ViewState is killed when I click page refresh or when I go some page and revert back
Code Snippet:
Thanks
The following is a "Hello World" kind of code for ViewState. I just want to know how to retain the ViewState 1) while Page Refresh when using UpdatePanel and also 2) While I reverting back to the page after round trip when using UpdatePanel?
In the following code snippet the ViewState is killed when I click page refresh or when I go some page and revert back
Code Snippet:
Code:
// Default.aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ASPCS2008ViewState._Default"
EnableViewState="true" ViewStateEncryptionMode="Always" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
private int Counter
{
get
{
object Instance = ViewState["Counter"];
return (Instance == null) ? 0 : (int)Instance;
}
set
{
ViewState["Counter"] = value;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Counter++;
TextBox1.Text = Counter.ToString();
}
protected void Button2_Click(object sender, EventArgs e)
{
Response.Redirect("SomePage.aspx");
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server" >
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server" >
<ContentTemplate>
<div>
<asp:Button ID="Button1" runat="server" Text="Click" onclick="Button1_Click" />
<br />
<br />
<span lang="en-us">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br />
</span>
<br />
<asp:Button ID="Button2" runat="server" Text="Go Some Page"
onclick="Button2_Click" />
<br />
<br />
</div>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
// SomePage.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="SomePage.aspx.cs" Inherits="ASPCS2008ViewState.SomePage"
EnableViewState="true" ViewStateEncryptionMode="Always" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Button2_Click(object sender, EventArgs e)
{
Response.Redirect("Default.aspx");
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" >
<ContentTemplate>
<p>
<span lang="en-us">Wellcome to Some Page! </span>
</p>
<p>
<asp:Button ID="Button2" runat="server" Text="Go back" onclick="Button2_Click" />
</p>
<div>
</div>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
Thanks
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