C# showing and hiding panels

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C# -- I have a winform that has 1 to n panels on it, where n could equal 50 or more. I do know the name (and can assign the name to a string variable) of the current panel that is visible, but if I want to make that panel visible = false and another visible = true, I need to know how to do that know only the name that is in a string variable.

Posted 12-Sep-12 10:38am

Member 8572197

Updated 12-Sep-12 10:45am

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[no name] 12-Sep-12 16:43pm

How exactly is "panel visible = false and another visible = true" any kind of a problem?

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wizardzz · Answer 1 · 2012-09-12T10:58:00

Solution 1

You are storing the names of your variables (panels), as strings? In some sort of collection? I really have to ask why?

I recommend storing the variables (panels) in a collection. Are they stored anywhere?

Posted 12-Sep-12 10:58am

wizardzz

Updated 12-Sep-12 10:59am

v2

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Sergey Alexandrovich Kryukov 12-Sep-12 17:03pm

My 5. That was my idea, too, but also: doing this is awkward with the Designer. Creation of so many controls should be in code -- please see my answer.
--SA

wizardzz 12-Sep-12 17:06pm

I agree with you.

Sergey Alexandrovich Kryukov · Answer 2 · 2012-09-12T11:01:00

You should not use the Name property. Using string data instead of actual data is one of the worst trends of the beginners these days, hard to say why. You need to store objects themselves, references. Now, I can only assume you created all 50 or more panels in Designer. This is totally wrong — a lot of manual work, nothing else. You should create them in your code, not auto-generated code. (Don't use <codename> at all!) This way, you can store the reference in an array or some other collection, for easy access and to avoid manual labor. (Are you a software developer, anyway? :-)). And then, yes, <code>panel.Visible = false; /* … */ panel.Visible = true; … you cannot go wrong with that…

—SA

Wes Aday · Answer 3 · 2012-09-12T11:03:00

You can get the panel out of the Controls collection using LINQ and the name of the Panel that you want to work with. This gets a panel out of the collection that has the name "panel1".

C#

var p = from c in this.Controls.Cast<Control>()
                      where c.Name == "panel1"
                      select c;
            Panel pan = (Panel)p.FirstOrDefault();

From there you can do whatever you want with it, make it visible, invisible, change the background color.

C# showing and hiding panels

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