Here Mudassar Ahmed Khan has explained with an example, how to perform AlphaNumeric validation i.e. allow only Alphabets and Numbers using OnKeyPress event in jQuery.
When User types in the TextBox, the text in the TextBox will be validated using OnKeyPress event handler in jQuery and if the inputted character is not AlphaNumeric i.e. Alphabet or Number, the error message will be displayed next to the TextBox.
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