FileSystemWatcher事件未触发C#
我将尝试遵循本教程: 但我的FileSystemWatcher事件似乎没有触发。知道为什么吗 另外,我对C#和Windows API的了解非常原始-请在回答时考虑到这一点 Window1.xaml.csFileSystemWatcher事件未触发C#,c#,wpf,winapi,filesystemwatcher,C#,Wpf,Winapi,Filesystemwatcher,我将尝试遵循本教程: 但我的FileSystemWatcher事件似乎没有触发。知道为什么吗 另外,我对C#和Windows API的了解非常原始-请在回答时考虑到这一点 Window1.xaml.cs using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows; using Syst
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;
using System.IO;
namespace WpfApplication1
{
/// <summary>
/// Interaction logic for Window1.xaml
/// </summary>
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
}
private void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
string watchedFolder = System.IO.Path.Combine(Environment.GetEnvironmentVariable("USERPROFILE"), "Pictures");
FileSystemWatcher fsw = new FileSystemWatcher(watchedFolder);
MainWindow.Title = "Monitoring: " + fsw.Path;
fsw.IncludeSubdirectories = true;
fsw.NotifyFilter = NotifyFilters.FileName | NotifyFilters.LastWrite;
fsw.Changed += new FileSystemEventHandler(fsw_Changed);
fsw.EnableRaisingEvents = true;
}
void fsw_Changed(object sender, FileSystemEventArgs e)
{
updatedImage.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Normal,
new Action(
delegate ()
{
ImageSourceConverter isc = new ImageSourceConverter();
updatedImage.Source = (ImageSource)isc.ConvertFromString(e.FullPath);
}
)
);
}
}
}
使用系统;
使用System.Collections.Generic;
使用System.Linq;
使用系统文本;
使用System.Threading.Tasks;
使用System.Windows;
使用System.Windows.Controls;
使用System.Windows.Data;
使用System.Windows.Documents;
使用System.Windows.Input;
使用System.Windows.Media;
使用System.Windows.Media.Imaging;
使用System.Windows.Navigation;
使用System.Windows.Shapes;
使用System.IO;
命名空间WpfApplication1
{
///
///Window1.xaml的交互逻辑
///
公共部分类Window1:Window
{
公共窗口1()
{
初始化组件();
}
已加载私有void主窗口(对象发送器、路由目标)
{
string watchedFolder=System.IO.Path.Combine(Environment.GetEnvironmentVariable(“USERPROFILE”),“Pictures”);
FileSystemWatcher fsw=新的FileSystemWatcher(watchedFolder);
MainWindow.Title=“监控:”+fsw.Path;
fsw.IncludeSubdirectories=true;
fsw.NotifyFilter=NotifyFilters.FileName | NotifyFilters.LastWrite;
fsw.Changed+=新的文件系统管理员(fsw\u已更改);
fsw.EnableRaisingEvents=true;
}
无效fsw_已更改(对象发送方、文件系统目标)
{
updateImage.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Normal,
新行动(
代表()
{
ImageSourceConverter isc=新的ImageSourceConverter();
updateImage.Source=(ImageSource)isc.ConvertFromString(e.FullPath);
}
)
);
}
}
}
Window1.xaml
<Window x:Class="WpfApplication1.Window1"
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:WpfApplication1"
mc:Ignorable="d"
Title="Window1" Height="350" Width="525"
Name="MainWindow">
<Grid>
<Image Name="updatedImage" />
</Grid>
</Window>
您的XAML似乎缺少一个关键部分。
MainWindow_加载的事件处理程序的绑定。
没有代码绑定到该事件,因此不会创建和初始化任何FileSystemWatcher
<Window x:Class="WpfApplication1.Window1"
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:WpfApplication1"
mc:Ignorable="d"
Title="Window1" Height="350" Width="525"
Name="MainWindow"
Loaded="MainWindow_Loaded">