Validate Textbox only to accept numeric

[aaraaayen 0]

Hi friends, how to validate textbox should accept only numeric in c#.Net. Please Help. Thanks in Advance, Regards,

Prya

[Ed Poore]

You can override the OnKeyPress or OnValidating methods of the TextBox, if overriding the KeyPress then simply filter out the keystrokes which are not numeric.  If overriding the OnValidating method then you can use int.TryParse to check to see if it's a valid integer. There are numerous articles on the web about how to do this, the best solution in my opinion would be to override the OnKeyPress event.

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[quiteSmart]

That will work if the user didn't use the paste feature

[Martin 0]

Hello, Look at this articles here on CP http://www.codeproject.com/info/search.asp?cats=3&searchkw=TextBox+Numeric&Submit1=Search&author=&sd=15+Nov+1999&ed=24+Jan+2007[^] All the best, Martin

[David Domingues]

to complete with a bit of code, what has been already so nicely said:

void TxtRegisteringKeyKeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
char[] myNum = new char[11] { '0' , '1', '2', '3', '4', '5', '6', '7', '8', '9', '\b' };
bool blnNumFnd = false;
foreach (char c in myNum)
{
if (e.KeyChar == c)
blnNumFnd = true;
}
if (!blnNumFnd)
e.KeyChar = '\0';
}

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[Ed Poore]

Hadn't thought of that :doh:, suppose it'll have to be either the OnValidating or OnTextChanged.

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I have no idea what I just said but my intentions were sincere. Poore Design

[engsrini]

Use MaskedTextBox Instead of Normal textbox, where you can restrict user entries