Collapse button controle from different cs file

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C#

controls

I have made a method (in a seperate cs file) to check if the FTP navigation has reached the "home" location

"/mnt/media_rw/C8D2F97eD2g27154"

.

When it has done this, it should collapse the Back button, and if not the back button should be visible.

The button is per default Collapsed.

public bool FTPcheckFolder(string FTPFolder)
{
    NfoCreator nfoCreator = new NfoCreator();

    if (FTPFolder == "/mnt/media_rw/C8D2F97eD2g27154")
    {
        nfoCreator.btn_FtpFolderBack.Visibility = Visibility.Collapsed;

        return true;

    }
    else
    {
    nfoCreator.btn_FtpFolderBack.Visibility = Visibility.Visible;
    return false;
    }
}

With my code I get the correct boolean value back when I include it in the messagebox tag, but the control will not collapse.


When I run it as debug, I see that

nfoCreator.btn_FtpFolderBack.Visibility = Visibility.Collapsed;

This is my xaml button -

<Button x:Name="btn_FtpFolderBack" Content="<< Back" HorizontalAlignment="Left" Height="19" Margin="383,23,0,0" VerticalAlignment="Top" Width="54" Click="btn_FtpFolderBack_Click" Visibility="Collapsed" x:FieldModifier="public"/>

The FieldModifier tag, I just tested with but not too sure about it


Hope somebody has some good ideas, thanks

What I have tried:

When I use this code in the forms cs file, it works fine -

Sharing sharUtil = new Sharing();

if (sharUtil.FTPcheckFolder(ftptmpfolder))
{
    btn_FtpFolderBack.Visibility = Visibility.Collapsed;
}
else
{
    btn_FtpFolderBack.Visibility = Visibility.Visible;
}

When I run it like

sharUtil.FTPcheckFolder(ftptmpfolder)

it will not collapse or make the button visible.

When perform a debug step into the method, it seems to work on the correct controle sets it correctly. The content on the button is ">> Back" so I think its fine

From Debug (Name - Value - Type)-
nfoCreator.btn_FtpFolderBack -

{System.Windows.Controls.Button: << Back}

- System.Windows.Controls.Button
nfoCreator.btn_FtpFolderBack.Visibility -

Collapsed

- System.Windows.Visibility