Asp.Net Textbox(AlphaNumeric)

Just add-

private void TextBox_KeyPress(object sender, KeyPressEventArgs e)     {         e.KeyChar = Char.ToUpper(e.KeyChar);     }
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Hope this helps...

Hi...

Refer the following links-

http://geekswithblogs.net/mbcrump/archive/2010/06/27/textbox-validation-for-alphanumeric-chars.aspx


http://www.codeproject.com/Questions/260680/how-to-restrict-user-to-enter-only-numbers-in-text


http://codingresolved.com/discussion/41/how-to-restrict-textbox-to-numbertextbox-numbers-onlytextbox-just-numbers/p1

Hope this helps.

Mark as accepted answer if it helps you out.