datagrid不与数据表绑定

Question

I'm working on a webpage in azure. Here's a part of my code:

 using (SqlConnection conn = new SqlConnection("my connection string"))
            {
                SqlCommand cmd = new SqlCommand("SELECT * FROM Students", conn);
                conn.Open();
                SqlDataAdapter _adp = new SqlDataAdapter(cmd);
                DataTable ds = new DataTable();
                _adp.Fill(ds);
                GridView1.DataSource = ds;

                GridView1.DataBind();
            }

Off course that instead of "my connection string" there's the real one...

The problem is that the page loads but without the gridview for some reason...

Any help will be great, Thanks

EDIT: I also tried with datasets, like this:

 using (SqlConnection conn = new SqlConnection("my connection string"))
            {
                SqlCommand cmd = new SqlCommand("SELECT * FROM Students", conn);
                conn.Open();
                SqlDataAdapter _adp = new SqlDataAdapter(cmd);
                DataSet ds = new DataSet();
                _adp.Fill(ds);
                GridView1.DataSource = ds.Tables[0];

                GridView1.DataBind();
            }

Answer 1

Try with GridView1.DataSource = ds.Tables[0];

whole code will look as follows:

using (SqlConnection conn = new SqlConnection("my connection string"))
            {
                SqlCommand cmd = new SqlCommand("SELECT * FROM Students", conn);
                conn.Open();
                SqlDataAdapter _adp = new SqlDataAdapter(cmd);
                DataSet ds = new DataTable();
                _adp.Fill(ds);
                GridView1.DataSource = ds.Tables[0];

                GridView1.DataBind();
            }