protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            SqlDataReader MyReader;
            SqlConnection MyConnection = new SqlConnection();
            MyConnection.ConnectionString = (@"Data Source=RGYJ-AVTYN682XD;Initial Catalog=库;User ID=sa;Password=sa123456789");
            SqlCommand MyCommand = new SqlCommand();
             = "SELECT * FROM 销售";
             = CommandType.Text;
            MyCommand.Connection = MyConnection;
            MyCommand.Connection.Open();
            //Response.Write("连接成功");
            MyReader = MyCommand.ExecuteReader(CommandBehavior.CloseConnection);
            GridView1.DataSource = MyReader;
            GridView1.DataBind();
        }
    }


运行以后为什么 GridView控件部分显示是空白 求解释