GridView控件修改、删除、分页、排序示例（修改含有DropDownList控件）

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing" OnSorting="GridView1_Sorting" OnRowUpdating="GridView1_RowUpdating" OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowDataBound="GridView1_RowDataBound" OnPageIndexChanging="GridView1_PageIndexChanging" CellPadding="4" AllowSorting="True" AllowPaging="True" PageSize="18">
              <Columns>
                  <asp:BoundField DataField="class_id" HeaderText="编号" ReadOnly="True" SortExpression="class_id">
                      <ItemStyle Width="60px" />
                  </asp:BoundField>
                  <asp:BoundField DataField="class_name" HeaderText="类别名称" SortExpression="class_name">
                      <ItemStyle Width="200px" />
                  </asp:BoundField>
                  
                  <asp:TemplateField HeaderText="父类别" SortExpression="class_parent">
                      <ItemTemplate>
>

  private void Bind()
    }