2011-01-19 124 views

回答

0

我希望這將正常工作Dropown列表中選擇指數變化空。

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> 
    <asp:DropDownList ID="DropDownList1" runat="server" CausesValidation="true" AutoPostBack="true"> 
    </asp:DropDownList> 
    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" ControlToValidate="TextBox1" runat="server" ErrorMessage="Please Enter the Value"></asp:RequiredFieldValidator>