WPF/プログレスバー の履歴(No.1)

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• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• WPF/プログレスバー へ行く。
  • 1 (2016-12-17 (土) 04:36:20)

WPF

Tag: WPF/プログレスバー

目次†

関連ページ†

参考情報†

プログレスバー付きのダイアログを実装†

• 独立したウィンドウに開始、終了ボタンを追加し、開始ボタンを押したらプログレスバーが開始するサンプルを作成すうｒ。
• xamlファイル。

  <Window x:Class="ControlDemo.DialogDemo.ProgressDialogBasic.ProgressDialogBasicWindow"
          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
          xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
          xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
          xmlns:local="clr-namespace:ControlDemo.DialogDemo.ProgressDialogBasic"
          mc:Ignorable="d"
          Loaded="UserControl_Loaded"
          Title="プログレスバー付きのダイアログ" Height="140" Width="300">
      <Grid>
          <Grid.RowDefinitions>
              <RowDefinition Height="Auto"></RowDefinition>
              <RowDefinition Height="Auto"></RowDefinition>
              <RowDefinition Height="*"></RowDefinition>
          </Grid.RowDefinitions>
          <ProgressBar x:Name="progressBar" Height="25" Margin="10" Minimum="0" Maximum="100" Value="50"/>
          <StackPanel Grid.Row="1" Orientation="Horizontal" Margin="10">
              <Button x:Name="buttonStart" Width="100" Click="Button_Click">開始</Button>
              <Button x:Name="buttonFinish" Width="100" Margin="10,0,0,0" Click="Button_Click_1" IsEnabled="False">終了</Button>
          </StackPanel>
      </Grid>
  </Window>
  
  

• 対応するクラス。

  namespace ControlDemo.DialogDemo.ProgressDialogBasic
  {
      /// <summary>
      /// ProgressDialogBasicWindow.xaml の相互作用ロジック
      /// </summary>
      public partial class ProgressDialogBasicWindow : Window
      {
          private BackgroundWorker backgroundWorker = new BackgroundWorker();
          private ProgressDialogBasicVM viewModel;
          public ProgressDialogBasicWindow()
          {
              InitializeComponent();
              this.viewModel = new ProgressDialogBasicVM();
              DataContext = viewModel;
  
              backgroundWorker.WorkerReportsProgress = true;
              backgroundWorker.WorkerSupportsCancellation = true;
              backgroundWorker.ProgressChanged += ProgressChanged;
              backgroundWorker.DoWork += DoWork;
              // not required for this question, but is a helpful event to handle
              backgroundWorker.RunWorkerCompleted += BackgroundWorker_RunWorkerCompleted;
          }
  
          private void UserControl_Loaded(object sender, RoutedEventArgs e)
          {
          }
  
          private void DoWork(object sender, DoWorkEventArgs e)
          {
              for (int i = 50; i <= 100; i++)
              {
                  if (backgroundWorker.CancellationPending)
                  {
                      e.Cancel = true;
                      return;
                  }
  
                  Thread.Sleep(200);
                  backgroundWorker.ReportProgress(i);
              }
          }
  
          private void ProgressChanged(object sender, ProgressChangedEventArgs e)
          {
              // This is called on the UI thread when ReportProgress method is called
              progressBar.Value = e.ProgressPercentage;
          }
  
          private void BackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
          {
              if (e.Cancelled)
              {
                  MessageBox.Show("Cancel");
              } else
              {
                  MessageBox.Show("Completed");
              }
  
              // This is called on the UI thread when the DoWork method completes
              // so it's a good place to hide busy indicators, or put clean up code
              buttonStart.IsEnabled = true;
              buttonFinish.IsEnabled = false;
          }
  
          private void Button_Click(object sender, RoutedEventArgs e)
          {
              buttonStart.IsEnabled = false;
              buttonFinish.IsEnabled = true;
              backgroundWorker.RunWorkerAsync();
          }
  
          private void Button_Click_1(object sender, RoutedEventArgs e)
          {
              backgroundWorker.CancelAsync();
  
              buttonStart.IsEnabled = true;
              buttonFinish.IsEnabled = false;
  
          }
      }
  }