下拉列表中的验证问题 [英] validation problem in dropdown list

问题描述

if (document.getElementById("<%=DropDownList6.ClientID%>").value == "0")
         {
        alert("Please fill the Event Starting Time");
          document.getElementById("<%=DropDownList6.ClientID%>").focus();
          return false;
                         }

这是代码...但是无法正常工作，可以告诉我这段代码有什么问题...

this is the code...but its not working can any 1 tell me whats the problem with this code...

推荐答案

尝试一下:

Try this:

function fnValidate()
{
    if(document.getElementById('<%=ddlTest.ClientID%>').selectedIndex == 0)
    {
        alert("Please select from drop down");
        return false;
    }
    return true;
}

--Amit

--Amit

您也可以尝试这个

Hi ,
You could also try this one

<div>
<asp:Button ID="Button2" runat="server" Text="Button" ValidationGroup="ss" />
<asp:DropDownList ID="DropDownList1" runat="server" AppendDataBoundItems="True"

    ValidationGroup="ss">
<asp:ListItem Text="---select---" Value="0" ></asp:ListItem>
<asp:ListItem Text="---test---" Value="1" ></asp:ListItem>

</asp:DropDownList>
<asp:CompareValidator ID="CompareValidator1" runat="server"

    ControlToValidate="DropDownList1" Display="Dynamic"

    ErrorMessage="CompareValidator" ForeColor="#FF3300" Operator="GreaterThan"

    SetFocusOnError="True" ValueToCompare="0" ValidationGroup="ss"></asp:CompareValidator>
    </div>

最好的问候
M.Mitwalli

Best Regards
M.Mitwalli

我可以建议一个替代方案吗?

为什么不尝试RequiredFieldValidator?为第一个元素提供一个空值，并将您的验证器定向到Dropdownlist6.

Can I suggest an Alternative?

Why not try RequiredFieldValidator? Provide an empty value for the first element and direct your validator to the Dropdownlist6.

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