How to pop up a error message in c#

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3.00/5 (2 votes)

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I want to pop up an error messsage in a radio button list example.if user fails to select a button i want to a pop up showing an error message saying you have to select each buton. how do I do that. Can I have the code please.

Posted 29-Aug-11 9:48am

pratheep7

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Sergey Alexandrovich Kryukov 29-Aug-11 23:06pm

What do you mean "in C#"? This is not about language but about UI library. Tag it: WPF, Forms, APS.NET, what?!
--SA

BillWoodruff 30-Aug-11 0:01am

Such great answers, such an ambiguous question :) 'Radio Buttons' in .NET, in one container, can have only one Button selected/active at a time. And, once one is selected, if you want to make sure none are selected, you have to do that in code. Without knowing specifically what you mean by "radio button list" and what you are trying to do ... can't say more.

3 solutions

Solution 1

MessageBox.Show()
http://msdn.microsoft.com/en-us/library/tewzaxwc.aspx[^]

Posted 29-Aug-11 9:50am

wizardzz

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Manfred Rudolf Bihy 29-Aug-11 15:52pm

That would be the "How" as OP specifically asked for! 5+

I'll try to get OP to think about the "when" too :).

wizardzz 29-Aug-11 16:03pm

Haha, thanks. I know, I'm trying to keep the blatant sarcasm out of QA since Chris's Lounge post last week.

Solution 2

If you really don't know the "How" then look at wizzards solution. I'm quite sure that you're not really concerned with "how" to show the message, but rather the "When".

Without knowing the intended workflow within your windows form application it's kind of hard to tell. I'll assume that you're doing a WinForm application and not doing ASP.NET as you didn't tag your question with ASP.NET.

If there is a button that gets pressed to process the form, that buttons click method would be the ideal place to check if a radio button is selected and show the message.

Best Regards,

—MRB

Posted 29-Aug-11 9:59am

Manfred Rudolf Bihy

Updated 29-Aug-11 10:03am

v2

Comments

Simon Bang Terkildsen 29-Aug-11 16:03pm

+5

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#realJSOP · Accepted Answer · 2011-08-29T10:01:00

Solution 3

Instead of doing it that way, use the event mechanism to set flags, and enable/disable the buttons as appropriate. Users HATE being interrupted by message box popups.

Posted 29-Aug-11 10:01am

#realJSOP

Comments

Manfred Rudolf Bihy 29-Aug-11 16:02pm

That's the best solution! 5+

Proposed as the solution.

wizardzz 29-Aug-11 16:06pm

I agree with this completely. Interrupting control of the application to tell the user they are dumb is very annoying. I almost always use flags for the purpose of required fields. I do still use popups if someone is about to do something verrrry stupid.

Espen Harlinn 29-Aug-11 19:13pm

Good point :)

Sergey Alexandrovich Kryukov 29-Aug-11 23:08pm

Most reasonable advice, my 5.
--SA