How to use ExecuteReader() method in ASP.Net c#?

How to use ExecuteReader() method in ASP.Net c#?, someone asked me to explain?

In this article we will discuss, how to use ExecuteReader() method in ASP.Net c#. When we want to return more than a single value by using ExecuteReader().


protected void Page_Load(object sender, EventArgs e)
            if (!IsPostBack)
                //Create the connection object
                SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["ShoppingZone"].ConnectionString); ;
                   // Pass theconnection to the command object, so the command object knows on which
                   // connection toexecute the command
                  SqlCommand cmd = new SqlCommand("Select * from employee", connection);
                   // Open theconnection. Otherwise you get a runtime error. An open connection is
                   // required toexecute the command
                   GridView1.DataSource = cmd.ExecuteReader();
                catch (Exception ex)
                   // HandleExceptions, if any
                   // The finallyblock is guarenteed to execute even if there is an exception.
                   //  This ensures connections are always properlyclosed.


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