gridview数据已绑定 每一行有一个下拉框 ，现在我想通过下拉框值的改变来改变这一行其中一列的显示数据，要怎么写代码
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- HTML code
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"> <Columns> <asp:BoundField DataField="ss" /> <asp:TemplateField> <ItemTemplate> <asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="true" onselectedindexchanged="DropDownList2_SelectedIndexChanged"> <asp:ListItem>sss</asp:ListItem> <asp:ListItem>eee</asp:ListItem> </asp:DropDownList> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView>