how to display formatted text but have the actual text

I have my own textbox which inherits System.Windows.Forms.TextBox

I am trying to display texts like 5000000 formatted ==> 5,000,000 but the problem is that Control.Text should return 5000000 but it should display 5,000,000.

I kno开发者_运维技巧w it is WTF, but i really need it and i couldn't Google a lot because my native language is not English(and anyone can get it from my grammar and Im sorry for that).

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When you want to retrieve it, convert the displayed string to an integer using int.Parse and CultureInfo.CurrentCulture then convert it back to a string using ToString and CultureInfo.InvariantCulture.

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(Note: haven't got time to look up the right method names, but hopefully I'm close enough to make sense...)

Create a custom control that derives from TextBox.

Add handlers to the control for focus events (or better, override the methods for OnFocus/OnBlur). When the control loses focus, store the current text in a private variable (say, OriginalText) and update the actual text to your formatted version. When the control gets focus, reinstate the original text.

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You can use the tag property, as Andrey suggested, and update the value of the tag property in the TextChange event.

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use Tag property that every control has

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You can keep origianl value in the Tag property (object).