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.NET Forum / Languages / VB.NET / July 2007Restrict input charaters in textbox
I would like to let the client input numeric, "," and "-" in the textbox, all the other else charater will take no effect on the value of the textbox. How can I do so? Thanks a lot! > I would like to let the client input numeric, "," and "-" in the > textbox, [quoted text clipped - 4 lines] > > Thanks a lot! The "standard" way is to handle the textbox's keydown, keypress, or keyup events and trap the invalid keys there and prevent them from going into the textbox. You may also have to trap paste events - it's been a while and I don't remember if the above will catch pasted text or not. Thanks, Seth Rowe Hi, You can search this newsgroup with this problem, http://groups.google.nl/group/microsoft.public.dotnet.languages.vb/search?group= microsoft.public.dotnet.languages.vb&q=numeric+textbox There you will find the solution as Seth has written. Cor >I would like to let the client input numeric, "," and "-" in the > textbox, [quoted text clipped - 4 lines] > > Thanks a lot! >I would like to let the client input numeric, "," and "-" in the > textbox, [quoted text clipped - 4 lines] > > Thanks a lot! You put something like the code below in the Textbox Keydown event If (e.KeyChar < "0" OrElse e.KeyChar > "9") _ AndAlso e.KeyChar <> ControlChars.Back AndAlso e.KeyChar <> "." Then 'cancel keys e.Handled = True End If >>I would like to let the client input numeric, "," and "-" in the >> textbox, [quoted text clipped - 4 lines] >> >> Thanks a lot! Sorry, that would be put in the Textbox KeyPress event is the right place. > If (e.KeyChar < "0" OrElse e.KeyChar > "9") _ > AndAlso e.KeyChar <> ControlChars.Back AndAlso e.KeyChar <> "." Then > 'cancel keys > e.Handled = True > End If Sorry about such silly question, I just don't know that I can done the task by e.handled = true. Thanks a lot. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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