How Do I Call Compute Function When I Change Value Of A Text Box

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I have 4 text boxes and a function with in pagetab of tabcontrol during load i was able to call that function to get values of the 4 textboxes and save the result to a textbox. I want to do the same call the function and auto compute when any of the 4 textboxes has changed its value or after user enter a value to any of them. I was able to read delegation and event. I some one give a sample code that has this delegate and event which i might get idea with.

Thank you in advance

Posted 2-Dec-14 19:56pm

JOEY G. MOYA

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Sinisa Hajnal 3-Dec-14 2:06am

Winforms?

JOEY G. MOYA 3-Dec-14 20:21pm

Hi I was able to do it perfectly using your solution
Thank you very much

Sinisa Hajnal 4-Dec-14 2:20am

No problem, glad to be of help.

BillWoodruff 3-Dec-14 5:48am

What does "function with in pagetab of tabcontrol" mean ? A function (method we say in C# .NET) is code: a TabPage in a TabControl is a UI component; it doesn't contain code ... unless it's the case that you have sub-classed it.

Please clarify.

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Sinisa Hajnal · Accepted Answer · 2014-12-02T20:07:00

Assuming WinForms:
There is Validated event that will trigger after changing focus and Validating event. In Validating you can cancel the change if someone enters invalid value, in Validated event you call whatever function you need.

No need for delegates or anything complex. Since you're not showing any code, this is the best I can do.