TextFile的Lifeupdate DataGrid具有良好的性能 [英] Lifeupdate DataGrid from TextFile with good performance
问题描述
实际状态:
我有一个带有4列的DataGrid
(Icon | DateTime | LogLevel | Message)
I have a DataGrid
with 4 Columns (Icon|DateTime|LogLevel|Message)
我用它作为查看器来呈现LogFile
的条目.
当打开Window
时,UI滞后,并且很多条目都被逐个添加到DataGrid
.
I use it as a viewer to present entries of a LogFile
.
When opening the Window
the UI lags and alot of entries are added one by one to the DataGrid
.
注意:我已经在使用多个线程.我的UI线程未冻结.它只是需要很长时间才能填满整个DataGrid
.
Note: I am already using multiple threads. My UI-Thread is not freezing. Its just taking way to long to fill the whole DataGrid
.
我想要的东西:
在将其显示给用户之前,我希望在整个窗口中进行预渲染"之类的操作.
I would prefer something like "pre-render" the whole window before showing it to the user.
当我用Aready一次打开Window
时-每次我再次打开它时,都没有问题了.(不呈现新的....?)
When I have aready opened the Window
once - every time I open it again, its no problem anymore.(not rendering new .... ?)
我尝试过的事情:
- 将
Visibility
设置为Hidden
并等待(Thread.Sleep()
)10秒,然后设置Visibility = Visibility.Visible
; - 将所有数据添加到ViewModel-Constructor中的
DataGrid
中
- Setting the
Visibility
toHidden
and wait(Thread.Sleep()
) 10 secs then setVisibility = Visibility.Visible
; - Adding all the Data into my
DataGrid
in ViewModel-Constructor
但是所有这些并没有真正解决它.我什至不确定是C#代码还是绑定...
but all this didn't really fix it. I ain't even sure if it's the C# Code or just the Bindings...
这可能是一个愚蠢的问题,但是有没有办法在显示DataGrid
及其Content
之前对其进行预渲染"?
This may be a silly question but is there a way to "pre-render" the DataGrid
and its Content
before displaying it ?
我还使用一些DataTriggers
设置RowColor,但这可能不是问题.
I also use some DataTriggers
to set RowColor but this might not be the problem..
以下是我使用的一些代码:
入门课程:
The Entry Class:
public class LogEntry
{
public string LogLevel { get; set; }
public string LogLevelIcon
{
get
{
switch(LogLevel)
{
case "[D]": //IF DEBUG ENTRY:
return "pack://application:,,,/Resources/Bug.png";
case "[F]": //IF FATAL ENTRY
return "pack://application:,,,/Resources/System-error-alt.png";
case "[E]": //IF ERROR ENTRY
return "pack://application:,,,/Resources/Error_32_WhiteBackground.png";
case "[I]": //IF INFO ENTRY
return "pack://application:,,,/Resources/Info_32.png";
case "[W]": //IF WARNING ENTRY
return "pack://application:,,,/Resources/Warning_32_WhiteBackground.png";
case "[DB]": //IF DB ENTRY
return "pack://application:,,,/Resources/Database.png";
default:
return string.Empty;
}
}
}
public string Message { get; set; }
public DateTime DateTime { get; set; }
public override string ToString()
{
return $"{LogLevel};{DateTime.ToString("dd.MM.yyyy HH:mm:ss")};{Message}";
}
}
从我的LogFile获取数据:
Getting the Data from my LogFile:
public void ExtractDataFromLogFile(string logFilePath)
{
new Thread(() => {
List<string> linesInFile = new List<string>();
using (FileStream stream = File.Open(logFilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
using (StreamReader reader = new StreamReader(stream))
{
while (true)
{
while (!reader.EndOfStream)
{
ProcessFileContent(reader.ReadLine());
}
while (reader.EndOfStream)
{
Thread.Sleep(50);
}
}
}
}
}).Start();
}
添加到
ObservableCollection<LogEntry>() _logEntries;
:
private void ProcessFileContent(string line)
{
Match match = _regex.Match(line);
if (match.Success)
{
LogEntry entry = new LogEntry()
{
LogLevel = match.Groups[1].ToString(),
DateTime = DateTime.Parse(match.Groups[2].ToString(), new CultureInfo("de-DE")),
Message = match.Groups[3].ToString()
};
_logEntries.Add(entry);
}
}
最后是DataGrid的XAML(样式遗漏了!):
Finally the XAML of the DataGrid (Styles left out!):
<DataGrid Grid.Row="1"
x:Name="DataGrid"
Grid.ColumnSpan="2"
Margin="5"
IsReadOnly="True"
AutoGenerateColumns="False"
CanUserReorderColumns="False"
ItemsSource="{Binding Path=ItemsView, UpdateSourceTrigger=PropertyChanged}">
<DataGrid.Columns>
<DataGridTemplateColumn Width="Auto">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Image Source="{Binding Path=LogLevelIcon, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}"
Width="16"
Height="16"></Image>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<DataGridTextColumn Width="Auto" Header="Datum"
Binding="{Binding Path=DateTime, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Width="*" Header="Meldung"
Binding="{Binding Path=Message, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}"/>
</DataGrid.Columns>
</DataGrid>
请注意,"ItemsView"的类型为ICollectionView
Note that "ItemsView" is typeof ICollectionView
我在这里填写
private void InitializeCollection()
{
ItemsView = CollectionViewSource.GetDefaultView(_logEntries);
BindingOperations.EnableCollectionSynchronization(_logEntries, _lock);
}
推荐答案
从文件中读取后,您应更改为:
With reading from file, you should change to:
XAML:
<DataGrid
Grid.Row="1"
x:Name="DataGrid"
Grid.ColumnSpan="2"
Margin="5"
IsReadOnly="True"
AutoGenerateColumns="False"
CanUserReorderColumns="False" ItemsSource="{Binding}">
<DataGrid.Columns>
<DataGridTemplateColumn Width="Auto">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Image Source="{Binding Path=LogLevelIcon, Mode=OneWay}" Width="16" Height="16"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<DataGridTextColumn Width="Auto" Header="Datum" Binding="{Binding Path=DateTime, Mode=OneWay}"/>
<DataGridTextColumn Width="*" Header="Meldung" Binding="{Binding Path=Message, Mode=OneWay}"/>
</DataGrid.Columns>
</DataGrid>
C#代码:
Dispatcher DP = Dispatcher.CurrentDispatcher;
public void ExtractDataFromLogFile(string logFilePath)
{
new Thread(() =>
{
var lines = File.ReadAllLines(logFilePath);
foreach (var line in lines) ProcessFileContent(line);
DP.Invoke(() => DataGrid.DataContext = _logEntries);
}).Start();
}
private void ProcessFileContent(string line)
{
Match match = _regex.Match(line);
if (match.Success)
{
LogEntry entry = new LogEntry()
{
LogLevel = match.Groups[1].ToString(),
DateTime = DateTime.Parse(match.Groups[2].ToString(), new CultureInfo("de-DE")),
Message = match.Groups[3].ToString()
};
_logEntries.Add(entry);
}
}
如果您对_logEntries
有任何绑定,请立即将其删除.
If you have any binding to _logEntries
, remove it by now.
按以下方式调用它:
ExtractDataFromLogFile("yourLogFile");
这会将您的数据加载到_logEntries
,完成后会自动绑定到DataGrid
.
This will load your data to _logEntries
, after finish, it auto bind to DataGrid
.
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