Question

[EDIT]
I changed my code according to the your answers. But now I get another error:

IndexOutOfRangeException was Handled.

I have an empty table to begin with. Weird..

Below is my code. Any idea?

using (SqlCeDataReader rdr = cmd.ExecuteReader())
{
    while (rdr.Read())
    {
        dg2.Items.Add(new DataItem2() { FooName = (string)rdr["FooName"],});
    }
    rdr.Close();
}

[EDIT – 2nd]
I edited my code and use rdr[0] instead of rdr[“String”], I get a different error

“Index was outside the bounds of the array.”

omg, this is driving my nuts. I have absolutely empty rows to start with and I have no idea how these strange errors pop up

using (SqlCeDataReader rdr = cmd.ExecuteReader())
{
    while (rdr.Read())
    {
        dg2.Items.Add(new DataItem2() { FooName = (string)rdr[0],});
    }
    rdr.Close();
}

Answer 1

As the message says, HasRows is not supported. You should be fine skipping that check. Also using using is recommended in these situations.

using(SqlCeDataReader rdr = cmd.ExecuteReader())
{
    while (rdr.Read())
    {
        dg2.Items.Add(new DataItem2() { FooName = (string)rdr["FooName"] });
    }
}