Im working on a WPF application. I have a label called "Status_label" in MainWindow.xaml
. and I want to change its content from a different class (signIn.cs).
Normally I'm able to do this
var mainWin = Application.Current.Windows.Cast<Window>().FirstOrDefault(window => window is MainWindow) as MainWindow;
mainWin.status_lable.Content = "Irantha signed in";
But my problem is,when I'm trying to access it via different thread in signIn.cs class, it gives an error:
The calling thread cannot access this object because a different thread owns it.
Can I solve this by using Dispatcher.Invoke(new Action(() =>{..........
or something else?
EDIT: I'm gonna call this label change action from different class as-well-as separate thread
MainWindow.xaml
<Label HorizontalAlignment="Left" Margin="14,312,0,0" Name="status_lable" Width="361"/>
SignIn.cs
internal void getStudentAttendence()
{
Thread captureFingerPrints = new Thread(startCapturing);
captureFingerPrints.Start();
}
void mySeparateThreadMethod()
{
var mainWin = Application.Current.Windows.Cast<Window>().FirstOrDefault(window => window is MainWindow) as MainWindow;
mainWin.status_lable.Dispatcher.Invoke(new Action(()=> mainWin.status_lable.Content ="Irantha signed in"));
}
line var mainWin return errorThe calling thread cannot access this object because a different thread owns it.
Please guide me,
Thank you
I resolved my question, hope somebody will need this. But don't know whether this is the optimized way.
In my mainWindow.xaml.cs :
public MainWindow()
{
main = this;
}
internal static MainWindow main;
internal string Status
{
get { return status_lable.Content.ToString(); }
set { Dispatcher.Invoke(new Action(() => { status_lable.Content = value; })); }
}
from my SignIn.cs class
MainWindow.main.Status = "Irantha has signed in successfully";
This works fine for me. You can find more details from here, Change WPF window label content from another class and separate thread
cheers!!