Wpf button command not firing icommand in viewmodel in MVVM model

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I have a View with a button as follows:

XAML

<Button  Content="Upload File" Margin="692,8,9,5" Grid.Row="2" Width="109" Background="Olive" Command="{Binding UploadBtnClick}"/>

XAML.cs

public ICommand UploadBtnClick { get; set; }
      public SourceFolder(List<string> selectedFiles)
      {
          InitializeComponent();
          UploadBtnClick = new RelayCommand(UploadBtnExecute, UploadBtnCanExecute);

      }

public bool UploadBtnCanExecute(object param)
      {
          return true;
      }
      public void UploadBtnExecute(object param)
      {
          MessageBox.Show("hello");
      }

not firing on button click

What I have tried:

not firing on button click

Posted 8-Jan-21 3:37am

john321a

Updated 8-Jan-21 4:37am

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Comments

Richard Deeming 8-Jan-21 9:53am

Check the Visual Studio output window for binding errors.

1 solution

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Gerry Schmitz · Accepted Answer · 2021-01-08T04:37:00

Solution 1

Check the DataContext.

public SourceFolder(List<string> selectedFiles) {
   InitializeComponent();
   UploadBtnClick = new RelayCommand(UploadBtnExecute, UploadBtnCanExecute);

   this.DataContext = this;
}

Any time the DataContext is set / reset, bindings will "bind / rebind".

Posted 8-Jan-21 4:37am

Gerry Schmitz