Sunday, August 22, 2010

How to stop a asp.net button being postback to server

Attach an OnClientClick java script function with return inline. From the function return false based on your logic
<%@ Page Language="C#" %>
<html>
<head id="Head1" runat="server">
    <script type="text/javascript">
        function Validate() {
            alert("Validate Controls");
            var isValid = false;
            if (isValid)
                document.forms[0].submit();
            return false;
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
        <asp:Button runat="server" ID="btnLogin" 
            OnClientClick="javascript:return Validate()" 
            Text="Login" />
    </form>
</body>
</html>

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