页面上有2个下拉控件时，验证控件不起作用

Question

<asp:DropDownList ID="dropdwnpizza" AppendDataBoundItems="true" runat="server" OnLoad="dropdwnpizza_Load">
    <asp:ListItem Text="<Select One>" Value="" />
</asp:DropDownList>
<asp:RequiredFieldValidator ID="rfqdropdwnpizza" runat="server" InitialValue="" ControlToValidate="dropdwnpizza" ForeColor="Red" ErrorMessage="*"></asp:RequiredFieldValidator>
<br />
<asp:Label ID="pizzasize" Text="Pizza Size" runat="server"></asp:Label><br />
<asp:DropDownList ID="DropDwnsize" runat="server">
    <asp:ListItem Text="Select One" Value=""></asp:ListItem>
    <asp:ListItem Text="small" Value="small"></asp:ListItem>
    <asp:ListItem Text="medium" Value="medium"></asp:ListItem>
    <asp:ListItem Text="large" Value="large"></asp:ListItem>
    <asp:ListItem Text="Extra Large" Value="Extra Large"></asp:ListItem>
</asp:DropDownList>
<asp:RequiredFieldValidator ID="rfqpizzasize" runat="server" InitialValue="" ControlToValidate="pizzasize" ForeColor="Red" ErrorMessage="*"></asp:RequiredFieldValidator>

当我将id = rfqpizzasize放置在ASPX页面上时，发生了一个无法验证" rfqpizzasizizizize"的控制tovalidate属性所引用的" pizzasize"。

Answer 1

rfqpizzasize应该具有 ControlToValidate="DropDwnsize"而不是 ControlToValidate="pizzasize"