Change TextBox Color using Required Field Validator

Hi all ,

try this example to Change TextBox Color using Required Field Validator

– Using Client Side :-

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<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <asp:CustomValidator ID="CustomValidator1" runat="server" ErrorMessage=""     ControlToValidate="TextBox1" ClientValidationFunction="ValidateTextBox"     OnServerValidate="CustomValidator1_ServerValidate"     ValidateEmptyText="True"></asp:CustomValidator>   <script src="jquery-1.2.6.js" type="text/javascript"></script> <script type="text/javascript">     function ValidateTextBox(source, args)     {         var is_valid = $("#TextBox1").val() != "";         $("#TextBox1").css("background-color", is_valid ? "white" : "red");         args.IsValid = is_valid;     } </script>

– Using Server Side :-

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protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args) {     bool is_valid = TextBox1.Text != "";     TextBox1.BackColor = is_valid ? Color.White : Color.Red;     args.IsValid = is_valid; }