用 WPF 实现日志查看器

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最佳答案

我应该开始出售这些 WPF 样品，而不是免费发放

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虚拟用户界面(使用 VirtualizingStackPanel) ，它提供了令人难以置信的良好性能(即使有200000多个项目)
完全 MVVM 友好。
每种 LogEntry类型的 DataTemplate。这些可以让你根据自己的需要进行定制。我只实现了2种 LogEntry (基本的和嵌套的) ，但是您已经明白我的意思了。您可以根据需要继承 LogEntry。您甚至可以支持富文本或图像。
可扩展(嵌套)项。
总结一下。
您可以使用 CollectionView实现过滤等。
WPF 岩石，只是复制和粘贴我的代码在一个 File -> New -> WPF Application，并看到自己的结果。

<Window x:Class="MiscSamples.LogViewer"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:MiscSamples"
Title="LogViewer" Height="500" Width="800">
<Window.Resources>
<Style TargetType="ItemsControl" x:Key="LogViewerStyle">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<ScrollViewer CanContentScroll="True">
<ItemsPresenter/>
</ScrollViewer>
</ControlTemplate>
</Setter.Value>
</Setter>


<Setter Property="ItemsPanel">
<Setter.Value>
<ItemsPanelTemplate>
<VirtualizingStackPanel IsItemsHost="True"/>
</ItemsPanelTemplate>
</Setter.Value>
</Setter>
</Style>


<DataTemplate DataType="{x:Type local:LogEntry}">
<Grid IsSharedSizeScope="True">
<Grid.ColumnDefinitions>
<ColumnDefinition SharedSizeGroup="Index" Width="Auto"/>
<ColumnDefinition SharedSizeGroup="Date" Width="Auto"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>


<TextBlock Text="{Binding DateTime}" Grid.Column="0"
FontWeight="Bold" Margin="5,0,5,0"/>


<TextBlock Text="{Binding Index}" Grid.Column="1"
FontWeight="Bold" Margin="0,0,2,0" />


<TextBlock Text="{Binding Message}" Grid.Column="2"
TextWrapping="Wrap"/>
</Grid>
</DataTemplate>


<DataTemplate DataType="{x:Type local:CollapsibleLogEntry}">
<Grid IsSharedSizeScope="True">
<Grid.ColumnDefinitions>
<ColumnDefinition SharedSizeGroup="Index" Width="Auto"/>
<ColumnDefinition SharedSizeGroup="Date" Width="Auto"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>


<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition/>
</Grid.RowDefinitions>


<TextBlock Text="{Binding DateTime}" Grid.Column="0"
FontWeight="Bold" Margin="5,0,5,0"/>


<TextBlock Text="{Binding Index}" Grid.Column="1"
FontWeight="Bold" Margin="0,0,2,0" />


<TextBlock Text="{Binding Message}" Grid.Column="2"
TextWrapping="Wrap"/>


<ToggleButton x:Name="Expander" Grid.Row="1" Grid.Column="0"
VerticalAlignment="Top" Content="+" HorizontalAlignment="Right"/>


<ItemsControl ItemsSource="{Binding Contents}" Style="{StaticResource LogViewerStyle}"
Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2"
x:Name="Contents" Visibility="Collapsed"/>


</Grid>
<DataTemplate.Triggers>
<Trigger SourceName="Expander" Property="IsChecked" Value="True">
<Setter TargetName="Contents" Property="Visibility" Value="Visible"/>
<Setter TargetName="Expander" Property="Content" Value="-"/>
</Trigger>
</DataTemplate.Triggers>
</DataTemplate>
</Window.Resources>


<DockPanel>
<TextBlock Text="{Binding Count, StringFormat='{}{0} Items'}"
DockPanel.Dock="Top"/>


<ItemsControl ItemsSource="{Binding}" Style="{StaticResource LogViewerStyle}">
<ItemsControl.Template>
<ControlTemplate>
<ScrollViewer CanContentScroll="True">
<ItemsPresenter/>
</ScrollViewer>
</ControlTemplate>
</ItemsControl.Template>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel IsItemsHost="True"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</DockPanel>
</Window>

暗号: (注意，其中大部分只是样板文件，以支持示例(生成随机条目)

public partial class LogViewer : Window
{
private string TestData = "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum";
private List<string> words;
private int maxword;
private int index;


public ObservableCollection<LogEntry> LogEntries { get; set; }


public LogViewer()
{
InitializeComponent();


random = new Random();
words = TestData.Split(' ').ToList();
maxword = words.Count - 1;


DataContext = LogEntries = new ObservableCollection<LogEntry>();
Enumerable.Range(0, 200000)
.ToList()
.ForEach(x => LogEntries.Add(GetRandomEntry()));


Timer = new Timer(x => AddRandomEntry(), null, 1000, 10);
}


private System.Threading.Timer Timer;
private System.Random random;
private void AddRandomEntry()
{
Dispatcher.BeginInvoke((Action) (() => LogEntries.Add(GetRandomEntry())));
}


private LogEntry GetRandomEntry()
{
if (random.Next(1,10) > 1)
{
return new LogEntry
{
Index = index++,
DateTime = DateTime.Now,
Message = string.Join(" ", Enumerable.Range(5, random.Next(10, 50))
.Select(x => words[random.Next(0, maxword)])),
};
}


return new CollapsibleLogEntry
{
Index = index++,
DateTime = DateTime.Now,
Message = string.Join(" ", Enumerable.Range(5, random.Next(10, 50))
.Select(x => words[random.Next(0, maxword)])),
Contents = Enumerable.Range(5, random.Next(5, 10))
.Select(i => GetRandomEntry())
.ToList()
};
}
}

资料项目:

public class LogEntry : PropertyChangedBase
{
public DateTime DateTime { get; set; }


public int Index { get; set; }


public string Message { get; set; }
}


public class CollapsibleLogEntry: LogEntry
{
public List<LogEntry> Contents { get; set; }
}

PropertyChangedBase:

public class PropertyChangedBase : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;


protected virtual void OnPropertyChanged(string propertyName)
{
Application.Current.Dispatcher.BeginInvoke((Action) (() =>
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
handler(this, new PropertyChangedEventArgs(propertyName));
}));
}
}