protected void FillData()
{
SqlConnection con = new SqlConnection(connectionstring);
SqlCommand cmd = new SqlCommand("select EmployeeId,EmployeeName,EmployeePhoneNumber from Employee", con);
SqlDataAdapter sda = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
sda.Fill(dt);
EmployeeView.DataSource = dt;
EmployeeView.DataBind();
}