Accessing a Control

Alex Wait

I am doing some of my first GUI C# programming. I have a program.cs and a form.cs code files. I have a refreshData() function that I want my button to call. It works if I use [code] RSSGuiVersion.Program.refreshData(); [/code] However, at the end of the function I want my function access a label called "currentSong" and change its text. How do I do this? I've tried [code] RSSGuiVersion.Armitunes.currentSong.Text = "a"; [/code] And I get An object reference is required for the nonstatic field, method, or property 'member' For the life of me I do not know where to go next.

2 Replies

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Alan19y ago
It sounds to me, Jan, as though refreshData is a static method in the Program class rather than the form class, and so Alex will need a reference to his form object to access the label.

Also, if the currentSong label is private or protected, he'll need to change it to public or internal so that it can be accessed from outside of the form.

If I'm right about this, Alex, and you're using .NET 2.0 or 3.0 (VS 2005) then you could access the label like this:

Application.OpenForms[0].currentSong.Text = "whatever";

If you're using .NET 1.0 or 1.1, then this won't work. Instead, you could change the refreshData method so that it takes a parameter of type Armitunes, like this:

public static void refreshData(Armitunes armitunes)
{
     // code
     armitunes.currentSong.Text = "whatever";
}

When calling this method from the form, you'd need to use:

RSSGuiVersion.Program.refreshData(this);
Jan Montano19y ago
Hi Alex,

You just need to modify RSSGuiVersion.Armitunes.currentSong.Text = "a"; into currentSong.Text = "a";