display sql table into data grid view control

See more:

C#

SQL-Server

try
           {
               sqlConnection.Open();
               sqlCommand = new SqlCommand(strQuery, sqlConnection);
               sqlReader = sqlCommand.ExecuteReader();

               while (sqlReader.Read())
               {

                   object[] row = { sqlReader[0]};
                   dataGridView1.Rows.Add(row);
               }

           }
           catch (Exception exc)
           {
               MessageBox.Show(exc.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
               return;
           }
           finally
           {
               Cursor.Current = Cursors.Default;
               sqlConnection.Close();
               if (sqlReader != null)
               {
                   sqlReader.Dispose();
                   sqlReader = null;
               }
               if (sqlCommand != null)
               {
                   sqlCommand.Dispose();
                   sqlCommand = null;
               }
           }
       }

i see system hang on while executing this line

object[] row = { sqlReader[0]};

and nothing is displayed in gridview, but when i add messagebox.show("code check"); than record is displayed with every time it picks data from database

any suggestion