asp.net 2.0下一个标准GRIDVIEW功能的实现（不用datasource控件）

asp.net 2.0下一个标准GRIDVIEW功能的实现（不用datasource控件）(3)             {
                ViewState["sortdirection"] = "desc";
            }
            else
            {
                ViewState["sortdirection"] = "asc";
            }
        }
        BindGrid();
    }
很明显，设置viewsate来保存每次排序时的顺序，上面的相信很容易理解。
     最后，实现编辑功能，因为在aspx页面中已经设置了OnRowEditing="GridView1_RowEditing"，其中GridView1_RowEditing的代码为
 protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        int empid;
        string fname, lname;
        empid = int.Parse(GridView1.Rows[e.RowIndex].Cells[0].Text);
        fname = ((TextBox)GridView1.Rows[e.RowIndex].Cells[1].Controls[0]).Text;
        lname = ((TextBox)GridView1.Rows[e.RowIndex].Cells[2].Controls[0]).Text;

        SqlConnection cnn = new SqlConnection(@"data source=localhost;initial catalog=northwind;user id=sa;passWord=123456");
        cnn.Open();
        SqlCommand cmd = new SqlCommand("update employees set firstname=@fname,lastname=@lname where employeeid=@empid", cnn);