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ページの作成:「WPFでプログレスバーを使ってみると、画面が更新されないで困っちゃうんだよ。どうやら、別スレッドでプログレスバーを更…」
WPFでプログレスバーを使ってみると、画面が更新されないで困っちゃうんだよ。どうやら、別スレッドでプログレスバーを更新しないといけないみたいなんだ。そこで、細かいことは抜きでサンプルをあげておくよ。
== xaml ==
<source lang="xml">
<Window x:Class="ProgressBarSample.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="124.627" Width="525" Loaded="Window_Loaded">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition/>
<RowDefinition Height="25"/>
</Grid.RowDefinitions>
<ProgressBar
Grid.Row="0"
Grid.Column="0"
Minimum="{Binding ProgressBar_Minimum}"
Maximum="{Binding ProgressBar_Maximum}"
Value="{Binding ProgressBar_Value}"/>
<Label
Grid.Row="1"
Grid.Column="0"
Content="{Binding Label_Content}"/>
<Button
Grid.Row="3"
Content="実行"
Click="Button_Click"
IsEnabled="{Binding Button_IsEnabled}"/>
</Grid>
</Window>
</source>
== DataContext ==
<source lang="csharp">
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//追加
using System.ComponentModel;
namespace ProgressBarSample
{
class MainWindowContext : INotifyPropertyChanged
{
private Int32 m_ProgressBar_Minimum;
public Int32 ProgressBar_Minimum
{
set
{
this.m_ProgressBar_Minimum = value;
this.OnPropertyChanged("ProgressBar_Minimum");
}
get { return this.m_ProgressBar_Minimum; }
}
private Int32 m_ProgressBar_Maximum;
public Int32 ProgressBar_Maximum
{
set
{
this.m_ProgressBar_Maximum = value;
this.OnPropertyChanged("ProgressBar_Maximum");
}
get { return this.m_ProgressBar_Maximum; }
}
private Int32 m_ProgressBar_Value;
public Int32 ProgressBar_Value
{
set
{
this.m_ProgressBar_Value = value;
this.OnPropertyChanged("ProgressBar_Value");
}
get { return this.m_ProgressBar_Value; }
}
private Boolean m_Button_IsEnabled;
public Boolean Button_IsEnabled
{
set
{
this.m_Button_IsEnabled = value;
this.OnPropertyChanged("Button_IsEnabled");
}
get { return this.m_Button_IsEnabled; }
}
private String m_Label_Content;
public String Label_Content
{
set
{
this.m_Label_Content = value;
this.OnPropertyChanged("Label_Content");
}
get { return this.m_Label_Content; }
}
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged(String p_PropertyName)
{
if (this.PropertyChanged != null)
{
this.PropertyChanged(this, new PropertyChangedEventArgs(p_PropertyName));
}
}
}
}
</source>
== ソース ==
<source lang="csharp">
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
//追加
using System.ComponentModel;
using System.Threading;
using System.Windows.Threading;
namespace ProgressBarSample
{
/// <summary>
/// MainWindow.xaml の相互作用ロジック
/// </summary>
public partial class MainWindow : Window
{
private MainWindowContext m_MainWindowContext;
private BackgroundWorker m_BackgroundWorker;
public MainWindow()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
this.m_MainWindowContext = new MainWindowContext();
this.DataContext = this.m_MainWindowContext;
this.m_MainWindowContext.ProgressBar_Minimum = 0;
this.m_MainWindowContext.ProgressBar_Maximum = 60;
this.m_MainWindowContext.ProgressBar_Value = 0;
this.m_MainWindowContext.Button_IsEnabled = true;
this.m_BackgroundWorker = new BackgroundWorker();
this.m_BackgroundWorker.DoWork += new DoWorkEventHandler(BackgroundWorker_DoWork);
this.m_BackgroundWorker.ProgressChanged += new ProgressChangedEventHandler(BackgroundWorker_ProgressChanged);
this.m_BackgroundWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(BackgroundWorker_RunWorkerCompleted);
this.m_BackgroundWorker.WorkerReportsProgress = true;
}
private void Button_Click(object sender, RoutedEventArgs e)
{
this.m_MainWindowContext.Label_Content = "処理をしています";
this.m_BackgroundWorker.RunWorkerAsync();
}
private void BackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
this.m_MainWindowContext.Button_IsEnabled = false;
for (Int32 i = 0; i < 60; i++)
{
this.m_BackgroundWorker.ReportProgress(i + 1);
Thread.Sleep(1000);
}
}
private void BackgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
this.m_MainWindowContext.ProgressBar_Value = e.ProgressPercentage;
if(e.ProgressPercentage == 60)
{
this.m_MainWindowContext.Label_Content = "処理が完了しました！";
}
}
private void BackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
new Window1().ShowDialog();
this.m_MainWindowContext.Button_IsEnabled = true;
this.m_MainWindowContext.Label_Content = String.Empty;
}
}
}
</source>
[[Category:C♯]]
[[Category:WPF]]
[[Category:ProgressBar]]
== xaml ==
<source lang="xml">
<Window x:Class="ProgressBarSample.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="124.627" Width="525" Loaded="Window_Loaded">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition/>
<RowDefinition Height="25"/>
</Grid.RowDefinitions>
<ProgressBar
Grid.Row="0"
Grid.Column="0"
Minimum="{Binding ProgressBar_Minimum}"
Maximum="{Binding ProgressBar_Maximum}"
Value="{Binding ProgressBar_Value}"/>
<Label
Grid.Row="1"
Grid.Column="0"
Content="{Binding Label_Content}"/>
<Button
Grid.Row="3"
Content="実行"
Click="Button_Click"
IsEnabled="{Binding Button_IsEnabled}"/>
</Grid>
</Window>
</source>
== DataContext ==
<source lang="csharp">
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//追加
using System.ComponentModel;
namespace ProgressBarSample
{
class MainWindowContext : INotifyPropertyChanged
{
private Int32 m_ProgressBar_Minimum;
public Int32 ProgressBar_Minimum
{
set
{
this.m_ProgressBar_Minimum = value;
this.OnPropertyChanged("ProgressBar_Minimum");
}
get { return this.m_ProgressBar_Minimum; }
}
private Int32 m_ProgressBar_Maximum;
public Int32 ProgressBar_Maximum
{
set
{
this.m_ProgressBar_Maximum = value;
this.OnPropertyChanged("ProgressBar_Maximum");
}
get { return this.m_ProgressBar_Maximum; }
}
private Int32 m_ProgressBar_Value;
public Int32 ProgressBar_Value
{
set
{
this.m_ProgressBar_Value = value;
this.OnPropertyChanged("ProgressBar_Value");
}
get { return this.m_ProgressBar_Value; }
}
private Boolean m_Button_IsEnabled;
public Boolean Button_IsEnabled
{
set
{
this.m_Button_IsEnabled = value;
this.OnPropertyChanged("Button_IsEnabled");
}
get { return this.m_Button_IsEnabled; }
}
private String m_Label_Content;
public String Label_Content
{
set
{
this.m_Label_Content = value;
this.OnPropertyChanged("Label_Content");
}
get { return this.m_Label_Content; }
}
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged(String p_PropertyName)
{
if (this.PropertyChanged != null)
{
this.PropertyChanged(this, new PropertyChangedEventArgs(p_PropertyName));
}
}
}
}
</source>
== ソース ==
<source lang="csharp">
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
//追加
using System.ComponentModel;
using System.Threading;
using System.Windows.Threading;
namespace ProgressBarSample
{
/// <summary>
/// MainWindow.xaml の相互作用ロジック
/// </summary>
public partial class MainWindow : Window
{
private MainWindowContext m_MainWindowContext;
private BackgroundWorker m_BackgroundWorker;
public MainWindow()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
this.m_MainWindowContext = new MainWindowContext();
this.DataContext = this.m_MainWindowContext;
this.m_MainWindowContext.ProgressBar_Minimum = 0;
this.m_MainWindowContext.ProgressBar_Maximum = 60;
this.m_MainWindowContext.ProgressBar_Value = 0;
this.m_MainWindowContext.Button_IsEnabled = true;
this.m_BackgroundWorker = new BackgroundWorker();
this.m_BackgroundWorker.DoWork += new DoWorkEventHandler(BackgroundWorker_DoWork);
this.m_BackgroundWorker.ProgressChanged += new ProgressChangedEventHandler(BackgroundWorker_ProgressChanged);
this.m_BackgroundWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(BackgroundWorker_RunWorkerCompleted);
this.m_BackgroundWorker.WorkerReportsProgress = true;
}
private void Button_Click(object sender, RoutedEventArgs e)
{
this.m_MainWindowContext.Label_Content = "処理をしています";
this.m_BackgroundWorker.RunWorkerAsync();
}
private void BackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
this.m_MainWindowContext.Button_IsEnabled = false;
for (Int32 i = 0; i < 60; i++)
{
this.m_BackgroundWorker.ReportProgress(i + 1);
Thread.Sleep(1000);
}
}
private void BackgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
this.m_MainWindowContext.ProgressBar_Value = e.ProgressPercentage;
if(e.ProgressPercentage == 60)
{
this.m_MainWindowContext.Label_Content = "処理が完了しました！";
}
}
private void BackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
new Window1().ShowDialog();
this.m_MainWindowContext.Button_IsEnabled = true;
this.m_MainWindowContext.Label_Content = String.Empty;
}
}
}
</source>
[[Category:C♯]]
[[Category:WPF]]
[[Category:ProgressBar]]