Hey khatri852,
Please refer below sample.
HTML
<%@ OutputCache Duration="5" VaryByParam="none" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Substitution Class Example</title>
</head>
<body>
<form id="form1" runat="server">
<p>
This section of the page is not cached:</p>
<asp:Substitution ID="Substitution1" MethodName="GetCurrentDateTime" runat="Server">
</asp:Substitution>
<br />
<p>
This section of the page is cached:</p>
<asp:Label ID="lblDate" runat="Server">
</asp:Label>
</form>
</body>
</html>
Code
protected void Page_Load(object sender, EventArgs e)
{
lblDate.Text = DateTime.Now.ToString();
}
public static string GetCurrentDateTime(HttpContext context)
{
return DateTime.Now.ToString();
}
VB.Net
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
lblDate.Text = DateTime.Now.ToString()
End Sub
Public Shared Function GetCurrentDateTime(ByVal context As HttpContext) As String
Return DateTime.Now.ToString()
End Function
Screenshot
