Solved

c# textbox validation

Posted on 2009-04-04
4
479 Views
Last Modified: 2012-05-06
i wanna validate my textbox to only allow/accept interger
0
Comment
Question by:-Huey-
[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
4 Comments
 
LVL 6

Accepted Solution

by:
Ramone_Hamilton earned 84 total points
ID: 24070849
Are you creating a webform or a webapplication.  If you are creating a web application use the numbervalidator control, if you are creating a winform you can check this on the KeyPress event. Look at the code below
protected void TextBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    int numIsInt = 0; 
    e.Handled = !int.TryParse(e.KeyChar.ToString(), out numIsInt);
}

Open in new window

0
 
LVL 70

Assisted Solution

by:Éric Moreau
Éric Moreau earned 83 total points
ID: 24071786
You could use the NumericUpDown control. Also have a look at http://www.emoreau.com/Entries/Articles/2003/03/Creating-your-own-Windows-Custom-Control.aspx
0
 
LVL 6

Assisted Solution

by:nandithaa
nandithaa earned 83 total points
ID: 24847735
Try this:

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if ((e.KeyChar > 47 && e.KeyChar < 58) || (e.KeyChar == 8))
            {
                e.Handled = false;
            }

            else
            {
                e.Handled = true;
            }
        }
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Article by: Ivo
C# And Nullable Types Since 2.0 C# has Nullable(T) Generic Structure. The idea behind is to allow value type objects to have null values just like reference types have. This concerns scenarios where not all data sources have values (like a databa…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…

734 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