After the code-beside method is bound to the GridView, EnableSortingAndPagingCallbacks does not work.

In today's study on the GridView, we found that when the code-beside method is used to bind the GridView (for example, I am binding a DataTable)
EnableSortingAndPagingCallbacks does not work.
Find some descriptions at the address below

Http://forums.asp.net/thread/1230450.aspx

Http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx? FeedbackID = 103040
Note...

1 <asp: GridView id = "Gridviewex1"
2 runat = "server"
3 AllowSorting = "True"
4 AutoGenerateColumns = "False"
5 EnableSortingAndPagingCallbacks = "True"
6 OnSorting = "gridviewex?sorting">
7 <Columns>
8 <asp: BoundField DataField = "ProductId" HeaderText = "ProductId" SortExpression = "ProductId"/>
9 <asp: BoundField DataField = "ProductName" HeaderText = "ProductName" SortExpression = "ProductName"/>
10 <asp: BoundField DataField = "QuantityPerUnit" HeaderText = "QuantityPerUnit" SortExpression = "QuantityPerUnit"/>
11 <asp: BoundField DataField = "UnitsInStock" HeaderText = "UnitsInStock" SortExpression = "UnitsInStock"/>
12 <asp: BoundField DataField = "ReorderLevel" HeaderText = "ReorderLevel" SortExpression = "ReorderLevel"/>
13 <asp: BoundField DataField = "Discontinued" HeaderText = "Discontinued" SortExpression = "Discontinued"/>
14 </Columns>
15 </aspx: GridView> 1 protected void Page_Load (object sender, EventArgs e)
2 {
3
4 if (! Page. IsPostBack)
5 {
6 this. BindGrid (string. Empty );
7}
8}
9
10 private void BindGrid (string sortExpression)
11 {
12 DataTable dt = new DataTable ();
13 SqlConnection conn = new SqlConnection ();
14 conn. ConnectionString = "server = wumeibo \ wmb; database = northwind; uid = sa; pwd = sa ;";
15 SqlCommand cmd = new SqlCommand ();
16 cmd. Connection = conn;
17 cmd. CommandType = CommandType. Text;
18 cmd. CommandText = "select * from products ";
19 SqlDataAdapter adapter = new SqlDataAdapter ();
20 adapter. SelectCommand = cmd;
21 adapter. Fill (dt );
22 DataView dv = dt. DefaultView ;;
23 if (! String. IsNullOrEmpty (sortExpression ))
24 {
25 dv = dt. DefaultView;
26 dv. Sort = sortExpression;
27}
28 this. Gridviewex1.DataSource = dv;
29 this. Gridviewex1.DataBind ();
30
31}
32 protected void gridviewexjavassorting (object sender, GridViewSortEventArgs e)
33 {
34 BindGrid (e. SortExpression );
35}

The following method has been tested: 1 protected void Page_Load (object sender, EventArgs e)
2 {
3 xx ();
4
5}
6
7 private void xx ()
8 {
9 SqlConnection conn = new SqlConnection ();
10 conn. ConnectionString = "server = wumeibo \ wmb; database = northwind; uid = sa; pwd = sa ;";
11
12 SqlDataSource source = new SqlDataSource ();
13 source. ConnectionString = "server = wumeibo \ wmb; database = northwind; uid = sa; pwd = sa ;";
14 source. SelectCommand = "select * from products ";
15
16 this. Gridviewex1.DataSource = source;
17 this. Gridviewex1.DataBind ();
18}