那位高手帮帮我Datable的问题

Question

SqlDataAdapter dataAdapter = new SqlDataAdapter();
        DataTable dataTable = new DataTable();
        private void GetData()
        {
            try
            {
                string ConnectionString = "server=PP123456\\SQLEXPRESS;database=Northwind;uid=sa;pwd=123";
                SqlConnection myCon = new SqlConnection(ConnectionString);
                myCon.Open();
                SqlCommand selectCommand = new SqlCommand("SELECT top 10 CustomerId,CompanyName FROM Customers", myCon);
                this.dataAdapter = new SqlDataAdapter();
                dataAdapter.SelectCommand = selectCommand;
                SqlCommandBuilder myCommandBuilder = new SqlCommandBuilder(dataAdapter);
           
                this.dataTable.Clear();
                dataAdapter.Fill(this .dataTable);
            }
            catch (SqlException e)
            {
                MessageBox.Show("查询结果出错了：" + e.Message);
            }
        }
        private void BindData2dgv()
        {
            DataTable dt = this.GetData();            this.dataGridView1.DataSource = dt;
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            this.BindData2dgv();        }
运行程序提示无法将类型void转换为System.Data.DataTable程序哪里错了 
请大家帮帮我 

Answer 1

private   void   BindData2dgv() 
                { 
                        this.GetData();                                              this.dataGridView1.DataSource   = this.dataTable;
                }