record not shown

Question

here is my code 

 

SqlConnection conn = new SqlConnection(ConStr1);

conn.Open();

SqlCommand cmd = new SqlCommand("select * from emplyees", conn);

cmd.CommandType = CommandType.Text;

SqlDataAdapter sda = new SqlDataAdapter();

DataSet ds = new DataSet();

sda.Fill(ds);

GridView1.DataSource = ds;

GridView1.DataBind();

conn.Close();

i want to display record on a button click event but record is not displaying could anyone help me what should i do?

code should examine.furthermore i don't want to use data set