CSharp Tip1

Today I try to reimplement a function which I have finished.But It seem not easy for me now because I barely remember how to realize it.I wasted a lot of time to look for data which I had found.So I think it is necessay to note it down in case I meet the same situation.

some good tools：

1. NHotkey –When it is necessary to listen to key event Globely.
2. PInvoke –When we need to use Win32 api,use this nuget package to simplify our work.

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something need to know.

• WPF cannot listen globe event.
  When it lose focus,It will not respone to any key event.
• Util now I didn’t find a perfect way to simulate the function like Alt+tab(show all windows on the desktop).
  I tried win32 api(EnumDesktopWindows,EnumWindows,GetWindow etc).However the result is not good.Some extra windows show up even though I didn’t open such app(window store,Moive and TV when I opened UWP app such as Iqiyi).And I tried use Process which has “MainWindowTitle” to get its windows.But it also has some problem.One Process may have several windows.And it only have one MainWindowHandle availble.

  List<Process> taskBarProcesses = Process.GetProcesses().
                                        Where(p => !string.IsNullOrEmpty(p.MainWindowTitle))
                                        .ToList();

• wpf commandBing usage(sometimes visual studio can help us finish it.We need to take advantage of the IDE)

  <Window.Resources>
          <RoutedUICommand x:Key="maketopmost" Text="MakeTopmost"/>
      </Window.Resources>
      <Window.CommandBindings>
          <CommandBinding Command="{StaticResource maketopmost}" CanExecute="CommandBinding_CanExecute" Executed="CommandBinding_Executed"/>
      </Window.CommandBindings>
      <Window.InputBindings>
          <KeyBinding Gesture="Ctrl+Q" Command="{DynamicResource maketopmost}" HotkeyManager.RegisterGlobalHotkey="True"/>
      </Window.InputBindings>

• The structure is important.I need to let the project easier to understand.