C# Function to Display Data in Gridview

create procedure sp_name
as
begin
select * from User_Details;
end

void GetData_proc()
{
     con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ConnectionString);
     cmd = new SqlCommand();
     cmd.CommandType = CommandType.StoredProcedure;
     cmd.CommandText = "sp_name";
     cmd.Connection = con;
     try
     {
         con.Open();
         GridView1.DataSource = cmd.ExecuteReader();
         GridView1.DataBind();
     }
     catch (Exception ex)
     {
         throw ex;
     }
     finally
     {
         con.Close();
         con.Dispose();
     }

}