琐碎的WPF应用程序中的不受管理的泄漏 [英] Unmanaged leak in a trivial WPF application
问题描述
当鼠标移到WPF应用上时，我遇到了泄漏非托管内存的情况.具体来说，当我在perfmon或Red Gate的内存分析器中对应用程序进行性能分析时，专用字节单调增加，但是所有托管堆中的字节保持不变-我认为这意味着该应用程序具有非托管泄漏.
我已经创建了一个简单的repro应用程序，但是我看不出问题出在哪里.
该应用程序由一个包含四个项的ListView组成.将鼠标快速移到这些项目上会导致问题.
如果您有兴趣重现此问题，请使用以下代码-它不漂亮，但很简单.
谢谢
修改:我创建了一个 App.xaml.cs Generic.xaml Window1.xaml Window1.xaml.cs
此问题似乎与用于方格背景的 App.xaml App.xaml.cs Generic.xaml Window1.xaml Window1.xaml.cs
The issue appears to have something to do with the 这篇关于琐碎的WPF应用程序中的不受管理的泄漏的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Windows;
namespace WpfLeakRepro
{
/// <summary>
/// Interaction logic for App.xaml
/// </summary>
public partial class App : Application
{
}
}
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<LinearGradientBrush x:Key="ListItemHover"
EndPoint="0,1"
StartPoint="0,0">
<GradientStop Color="Aqua"
Offset="0" />
<GradientStop Color="White"
Offset="1" />
</LinearGradientBrush>
<LinearGradientBrush x:Key="ListItemSelected"
EndPoint="0,1"
StartPoint="0,0">
<GradientStop Color="Blue"
Offset="0" />
<GradientStop Color="White"
Offset="1" />
</LinearGradientBrush>
<VisualBrush x:Key="CheckeredBackground"
Viewport="20,20,20,20"
ViewportUnits="Absolute"
TileMode="Tile"
Stretch="Fill">
<VisualBrush.Visual>
<Canvas Opacity="5">
<Rectangle Fill="#FF606060"
Height="21"
Width="21"
Canvas.Top="20" />
<Rectangle Fill="#FF606060"
Width="21"
Height="21"
Canvas.Left="20" />
<Rectangle Fill="#FF646464"
Height="21"
Width="21"
Canvas.Left="20"
Canvas.Top="20" />
<Rectangle Fill="#FF646464"
Width="21"
Height="21" />
</Canvas>
</VisualBrush.Visual>
</VisualBrush>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListViewItem}">
<Border Background="{TemplateBinding Background}">
<Grid>
<GridViewRowPresenter />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver"
Value="true">
<Setter Property="Background"
Value="{DynamicResource ListItemHover}" />
</Trigger>
<Trigger Property="IsSelected"
Value="true">
<Setter Property="Background"
Value="{DynamicResource ListItemSelected}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
<Window x:Class="WpfLeakRepro.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="449" Width="497">
<Grid>
<ListView Margin="12"
Name="listView"
ItemsSource="{Binding}">
<ListView.View>
<GridView>
<GridView.Columns>
<GridViewColumn Header="File Name">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="Thumbnail">
<GridViewColumn.CellTemplate>
<DataTemplate>
<Border Background="{DynamicResource CheckeredBackground}" Width="72" Height=48/>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView.Columns>
</GridView>
</ListView.View>
</ListView>
</Grid>
</Window>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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;
using System.ComponentModel;
using System.Collections.ObjectModel;
using System.IO;
namespace WpfLeakRepro
{
public class Picture
{
public string Name { get; set; }
}
/// <summary>
/// Interaction logic for Window1.xaml
/// </summary>
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
List<Picture> pictures = new List<Picture>();
string[] images = new string[] {"Blue hills.jpg", "Sunset.jpg", "Water lilies.jpg", "Winter.jpg" };
foreach (string imagePath in images)
{
pictures.Add(new Picture() { Name = imagePath });
}
DataContext = pictures;
}
}
}
VisualBrush有关.用SolidColorBrush替换它，问题就消失了.但这并不重要:Microsoft的人员建议我安装.NetFx 3.5sp1的最新升级，这似乎可以解决问题(更多详细信息，请参见Microsoft Connect issue for this problem.
<Application x:Class="WpfLeakRepro.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="Window1.xaml">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Generic.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
</Application>
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Windows;
namespace WpfLeakRepro
{
/// <summary>
/// Interaction logic for App.xaml
/// </summary>
public partial class App : Application
{
}
}
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<LinearGradientBrush x:Key="ListItemHover"
EndPoint="0,1"
StartPoint="0,0">
<GradientStop Color="Aqua"
Offset="0" />
<GradientStop Color="White"
Offset="1" />
</LinearGradientBrush>
<LinearGradientBrush x:Key="ListItemSelected"
EndPoint="0,1"
StartPoint="0,0">
<GradientStop Color="Blue"
Offset="0" />
<GradientStop Color="White"
Offset="1" />
</LinearGradientBrush>
<VisualBrush x:Key="CheckeredBackground"
Viewport="20,20,20,20"
ViewportUnits="Absolute"
TileMode="Tile"
Stretch="Fill">
<VisualBrush.Visual>
<Canvas Opacity="5">
<Rectangle Fill="#FF606060"
Height="21"
Width="21"
Canvas.Top="20" />
<Rectangle Fill="#FF606060"
Width="21"
Height="21"
Canvas.Left="20" />
<Rectangle Fill="#FF646464"
Height="21"
Width="21"
Canvas.Left="20"
Canvas.Top="20" />
<Rectangle Fill="#FF646464"
Width="21"
Height="21" />
</Canvas>
</VisualBrush.Visual>
</VisualBrush>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListViewItem}">
<Border Background="{TemplateBinding Background}">
<Grid>
<GridViewRowPresenter />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver"
Value="true">
<Setter Property="Background"
Value="{DynamicResource ListItemHover}" />
</Trigger>
<Trigger Property="IsSelected"
Value="true">
<Setter Property="Background"
Value="{DynamicResource ListItemSelected}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
<Window x:Class="WpfLeakRepro.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="449" Width="497">
<Grid>
<ListView Margin="12"
Name="listView"
ItemsSource="{Binding}">
<ListView.View>
<GridView>
<GridView.Columns>
<GridViewColumn Header="File Name">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
<GridViewColumn Header="Thumbnail">
<GridViewColumn.CellTemplate>
<DataTemplate>
<Border Background="{DynamicResource CheckeredBackground}" Width="72" Height=48/>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView.Columns>
</GridView>
</ListView.View>
</ListView>
</Grid>
</Window>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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;
using System.ComponentModel;
using System.Collections.ObjectModel;
using System.IO;
namespace WpfLeakRepro
{
public class Picture
{
public string Name { get; set; }
}
/// <summary>
/// Interaction logic for Window1.xaml
/// </summary>
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
List<Picture> pictures = new List<Picture>();
string[] images = new string[] {"Blue hills.jpg", "Sunset.jpg", "Water lilies.jpg", "Winter.jpg" };
foreach (string imagePath in images)
{
pictures.Add(new Picture() { Name = imagePath });
}
DataContext = pictures;
}
}
}
VisualBrush that was being used for the checkered background. Replace this with a SolidColorBrush, and the issue goes away. But it really doesn't matter: the folks at Microsoft suggested that I install the latest upgrades to .NetFx 3.5sp1, and this seems to fix the problem (more details here).
