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[WPF] ウィンドウ位置の保存、復元

Posted at

開発環境

  • Visual Studio 2017
  • WPF 4.5.1

概要

  1. Settings.settingsを利用してパラメータを保持する。
  2. イベントを利用して、適宜処理を行う。
    2017-05-30_18h36_59.png

サンプルコード(該当コードのみ)

/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
	/// <summary>
	/// OnSourceInitialized
	/// </summary>
	/// <param name="e">EventArgs</param>
	protected override void OnSourceInitialized(EventArgs e)
	{
		base.OnSourceInitialized(e);

		LoadWindowPlacement();
	}

	/// <summary>
	/// OnClosing
	/// </summary>
	/// <param name="e">CancelEventArgs</param>
	protected override void OnClosing(CancelEventArgs e)
	{
		base.OnClosing(e);

		if (!e.Cancel)
		{
			SaveWindowPlacement();
		}
	}

	/// <summary>
	/// Window位置の復元
	/// </summary>
	void LoadWindowPlacement()
	{
		Properties.Settings.Default.Reload();

		var bounds = Properties.Settings.Default.Bounds;
		Left = bounds.Left;
		Top = bounds.Top;
		Width = bounds.Width;
		Height = bounds.Height;

		WindowState = Properties.Settings.Default.WindowState;
	}

	/// <summary>
	/// Window位置の保存
	/// </summary>
	void SaveWindowPlacement()
	{
		Properties.Settings.Default.WindowState = WindowState == WindowState.Minimized ? WindowState.Normal : WindowState; // 最小化は保存しない
		Properties.Settings.Default.Bounds = RestoreBounds;

		Properties.Settings.Default.Save();
	}
}
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