Validating textbox using javascript in MasterPage_问答_开发者

Validating textbox using javascript in MasterPage

开发者 https://www.devze.com 2023-01-16 07:52 出处：网络

I am using javascript for customValidator to validate textboxes in ASP.Net. The code works perfectly when I am using a normal page, but as soon as I put that inside a MasterPage, the code doesn\'t wor

Below is the code for my aspx page. If I put this code inside a MasterPage it doesn't work. Could you guys advise me how to make this work inside a MasterPage

Thanks, Abhi.

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server开发者_Python百科">
<title></title>
</head>
<body>
<form id="form1" runat="server">

<script type="text/javascript">
 function validateOrFields(source, args){
 var sUser = document.getElementById('TextBox1');

   if (sUser.value == "")
   {
      args.IsValid = false;
   }
   else
   {
      args.IsValid = true;
   }  
   return;  
 }

<div>
    <asp:TextBox ID="TextBox1"
        runat="server"></asp:TextBox>
        <asp:CustomValidator ID="FieldValidator" 
                    runat="server" 
                    Text="Enter either a user name" 
                    ClientValidationFunction="validateOrFields" onservervalidate="FieldValidator_ServerValidate"/>
        <asp:Button ID="Button1" runat="server" Text="Button" />
</div>
</form>
</body>
</html>

The problem is the ID of the TextBox. When placed in the Master Page, it gets a different ClientID.

var sUser = document.getElementById('<%= TextBox1.ClientID %>');

you need to get the id by using ClientID

Replace your code by

var sUser = document.getElementById('<%= TextBox1.ClientID %>');

Try document.getElementById('ct100_TextBox1').value. It is just a temporary fix!! But anyone please suggest how to get this ID dynamically using code. I got this by viewing source of the page generated. I have also posted the same question here link text