Following is code for adding background color to the text box if validation fails in asp.net web form-
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:TextBox ID="txtOne" runat="server" />
<asp:RequiredFieldValidator ID="rfv" runat="server"
ControlToValidate="txtOne" Text="" />
<asp:TextBox ID="txtTwo" runat="server" />
<asp:RequiredFieldValidator ID="rfv2" runat="server"
ControlToValidate="txtTwo" Text="" />
<asp:Button ID="btnOne" runat="server" OnClientClick="return BtnClick();"
Text="Click" CausesValidation="true" />
<script type="text/javascript">
function BtnClick() {
var val = Page_ClientValidate();
if (!val) {
var i = 0;
for (; i < Page_Validators.length; i++) {
if (!Page_Validators[i].isvalid) {
$("#" + Page_Validators[i].controltovalidate)
.css("background-color", "red");
}
}
}
return val;
}
</script>
</form>
</body>
</html>
