<asp:GridView ID="GridView1" runat="server" AllowSorting="true" AutoGenerateColumns="false" onsorting="GridView1_Sorting"><Columns><asp:BoundField HeaderText="Column1" DataField="Field1" SortExpression="Field1" /><asp:BoundField HeaderText="Column2" DataField="Field2" SortExpression="Field2" /></Columns>
</asp:GridView>

[Serializable]
public class TestClass
{public int Field1 { get; set; }public int Field2 { get; set; }
}

protected void Page_Load(object sender, EventArgs e)
{List<TestClass> oData = new List<TestClass>();for (int i = 1; i <= 10; i++){TestClass t = new TestClass() { Field1 = i, Field2 = 11 - i };oData.Add(t);}ViewState["Data"] = oData;this.GridView1.DataSource = oData;this.GridView1.DataBind();
}

protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
{//从ViewState取得绑定在界面的数据源List<TestClass> oDatas = (List<TestClass>)ViewState["Data"];//从Session取得当前字段的排序状态if (Session[e.SortExpression] == null){Session[e.SortExpression] = SortDirection.Ascending;}//判断当前，如果为升序，则以倒序排序一次，如果为倒序，则以升序排序一次，并更新当前排序//动态的重点在于利用反射，根据e.SortExpression取得排序栏位if ((SortDirection)Session[e.SortExpression] == SortDirection.Ascending){oDatas = oDatas.OrderBy(c => c.GetType().GetProperty(e.SortExpression).GetValue(c, null)).ToList();Session[e.SortExpression] = SortDirection.Descending;}else{oDatas = oDatas.OrderByDescending(c => c.GetType().GetProperty(e.SortExpression).GetValue(c, null)).ToList();Session[e.SortExpression] = SortDirection.Ascending;}//重新绑定一次排序後的数据以显示结果GridView gv = sender as GridView;gv.DataSource = oDatas;gv.DataBind();
}