-- JQuery GridView One CheckBox Selected Check

   if ($('#<%=GridView1.ClientID%> input:checkbox:checked').length > 0) {
      alert('selected');
    }
   else {
       alert('Not Selected');
    }

-- Asp.net Embedded InLine Code Binding --

Page Directive
<%@ Page Language="C#" %>
Rendering Code
<% Response.Write("Hello World!"); %>
<%= SayHello("Ahmed") %>
<%: DateTime.Now.ToString() %>
Expression Syntax
<%$ ConnectionStrings:ConnStrFromWebConfig %>
<%$ AppSettings:ValueFromWebConfig %>
<%$ Resources:Resource, Arabic %>
<%$ RouteValue:year %>
<%$ YourExpressionPrefix : Any %>
Data Binding Syntax
<%# Eval("Name") %>
<%# Bind("Name") %>
<%# XPath ("Name") %>
Comment Server
<%-- -- %>