How to prevent copying and pasting bad characters into text box

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VS2010

How to prevent copying and pasting bad characters into text box? I have a test box for adding information similar to this Ask a Question text book. The user some time will use another editor (Word, Lotus and etc.) These different editor will leave some type of garbage or bad characters. Also, the this text box has a file or character limit and these bad or garbage characters are invisible to users. These invisible cause the character count to exceed what is expected.

Posted 15-Sep-15 10:25am

Member 11227881

Updated 15-Sep-15 10:40am

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Samira Radwan 15-Sep-15 16:33pm

what do you mean by bad characters? Do you use it as parameter to a SQL query? you could use regular expression. Please be more specific

CHill60 15-Sep-15 16:34pm

What have you tried?
What platform (WinForm, WebForm, XAML?)

j snooze 15-Sep-15 17:25pm

You could make a whitelist of acceptable characters and validate the pasted text against that list.

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