Textbox Validation in C# windows

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Hi

I should Validation Textbox such that after entering alphanumeric values if last value is number it should not consider a char value.

For e.g. if I enter abcd123 in textbox after 123 it should not take any char value but it must take numbers only at the end.

Posted 28-Jul-11 20:25pm

Briju.metallica

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koolprasad2003 · Answer 1 · 2011-07-28T20:52:00

You can check it on KeyPress event of Textbox, following code will allow you to enter only numbers

if (char.IsDigit(e.KeyChar))
    e.Handled = false;
 else
    e.Handled = true;

Just add some logic of counter or Flag to check if char's enter.
Once number entered set flag and allow only numeric values