CS1002 ：； 预期

Question

I'm trying to do a JS code in my websitem but it returns me an error Code:

 var f1 = document.getElementById("<%UserName.ClientID ;%>").value;
    var f2 = document.getElementById("<%email.ClientID ;%>").value;
    var f3;
    f3 = document.getElementById("<%Password.ClientID ;%>").value;

Answer 1

如果使用的是asp.net mvc，则应为<%=UserName.ClientID%>或<%:UserName.ClientID%>

Answer 2

使用<%=代替。

var f1 = document.getElementById("<%=UserName.ClientID%>").value;

Answer 3

You have an extra ; in your code. and missing the =

change

<%UserName.ClientID ;%> <%email.ClientID ;%> <%Password.ClientID ;%>

To

<%= UserName.ClientID %> <%= email.ClientID %> <%= Password.ClientID %>

Alternatively, if you're using .Net 4 or above you can set the ClientIDMode="Static" on your controls and you don't need to call .ClientID .

So for example, a textbox would be:

<asp:Textbox runat="Server" ID="email" ClientIDMode="Static" />

You just use the ID of the element, IE

var f2 = document.getElementById("email").value;

This makes life and code SO much cleaner :)

Answer 4

Does this work for you?

var f1 = document.getElementById("<%= UserName.ClientID %>").value;
var f2 = document.getElementById("<%= email.ClientID %>").value;
var f3;
f3 = document.getElementById("<%= Password.ClientID %>").value;

I changed "<%" to "<%=" and removed the semicolon at the end.

eg From <%UserName.ClientID ;%> to <%= UserName.ClientID %>