Solved

How to change the textbox background color when the Regular expression shows an error?

Posted on 2009-04-12
1
355 Views
Last Modified: 2013-11-26
Instead of using the error message "Error" I would like to change the textbox txtzipcode  background red using CSS can this be done.

<form id="form1" runat="server">
    <div>
   
        <asp:TextBox ID="txtzipcode" runat="server"></asp:TextBox>
        <asp:RegularExpressionValidator ID="ValZipcode" runat="server"
            BorderStyle="None" ControlToValidate="txtzipcode"
            ErrorMessage="Error"
           
           
            ValidationExpression="^((\d{5}-\d{4})|(\d{5})|([AaBbCcEeGgHhJjKkLlMmNnPpRrSsTtVvXxYy]\d[A-Za-z]\s?\d[A-Za-z]\d))$"
            ForeColor="#FF3300"></asp:RegularExpressionValidator>
        <br />
        <asp:Button ID="Button1" runat="server" Text="Button" />
   
    </div>
    </form>
0
Comment
Question by:WDJ98338
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 13

Accepted Solution

by:
numberkruncher earned 500 total points
ID: 24127337
I don't think that you can do that with the regular expression validator control; however it is very easy to add this functionality to your button click handler.
protected void Button1_Click(object sender, EventArgs e)
{
    string pattern = @"^((\d{5}-\d{4})|(\d{5})|([AaBbCcEeGgHhJjKkLlMmNnPpRrSsTtVvXxYy]\d[A-Za-z]\s?\d[A-Za-z]\d))$";
 
    if (!Regex.IsMatch(txtzipcode.Text, pattern, RegexOptions.Compiled))
    {
        txtzipcode.BackColor = Color.Red;
    }
}

Open in new window

0

Featured Post

Space-Age Communications Transitions to DevOps

ViaSat, a global provider of satellite and wireless communications, securely connects businesses, governments, and organizations to the Internet. Learn how ViaSat’s Network Solutions Engineer, drove the transition from a traditional network support to a DevOps-centric model.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Building a website can seem like a daunting task to the uninitiated but it really only requires knowledge of two basic languages: HTML and CSS.
This article shows how to deploy dynamic backgrounds to computers depending on the aspect ratio of display
In this tutorial viewers will learn how to style rounded corners for elements in CSS using the border-radius property Begin with a normal styled element such as a div: To style all four corners of the div to be the same degree of roundness, use the …
This video teaches viewers how to create their own website using cPanel and Wordpress. Tutorial walks users through how to set up their own domain name from tools like Domain Registrar, Hosting Account, and Wordpress. More specifically, the order in…

726 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question