Let's say I want a function like this:
private void ShowLabel(byte Variable)
{
labelXXX.Show();
}
But with Variable's value instead of XXX. Is it possible?
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3You can do this with Reflection, but it's non-trivial. What are you trying to accomplish?Jim Mischel– Jim Mischel2010-11-05 23:45:35 +00:00Commented Nov 5, 2010 at 23:45
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WPF? Win Forms? ASP.NET?BrokenGlass– BrokenGlass2010-11-05 23:46:33 +00:00Commented Nov 5, 2010 at 23:46
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2Another programmer coming from PHP would be my guess ;-)user166390– user1663902010-11-05 23:47:54 +00:00Commented Nov 5, 2010 at 23:47
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@Jim, reflection is not needed, and this IS trivial. (in at least WinForms, WPF, and ASP.NET)Ben Voigt– Ben Voigt2010-11-05 23:55:53 +00:00Commented Nov 5, 2010 at 23:55
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3 Answers
You don't need reflection, you can use
- Windows Forms:
Controls.Find("label" + Variable.ToString()) - ASP.NET:
FindControl("label" + Variable.ToString()) - WPF:
FindName("label" + Variable.ToString())
But using a Dictionary<byte, Label>, as suggested by CodeInChaos, would be preferable.
1 Comment
Jim Mischel
I stand corrected. My non-GUI focus is showing. Nice answer.
you could create an array of the Labels and use the value of Variable as the index to that array. But you question is pretty vague. Could you give more info on why you need to do this?
1 Comment
Ethesen
Actually I don't really need this. :P I'm just curious if this is possible as I couldn't find anything about it. I'm not interested in other soulutions for making a function that I wrote as example, only if it is possible to simply combine a variable and object's name, but I guess it's not unfortunately. :)
While you can do it with reflection, it smells. If you have many labels which are only distinguished by a number, perhaps create them at runtime and put them in List or dictionary, so you can look them up from the ID.
You could iterate over all the children of the parent control, compare their name to the name you want to find the control you want. But that has a bad smell.
