使用FileSystemWatcher重复事件 [英] Duplicate Events with FileSystemWatcher
本文介绍了使用FileSystemWatcher重复事件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
HI，
我正在开发用户控件.需要在以下位置检查文件
我需要在2个地方初始化FileSystemWacther事件.
1)在EndInit();
2)在属性FileNameChange
NotifyFilters: NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName
现在它使用FileSystemWacther产生重复事件.
如何避免这种情况，请帮助我，在此先感谢.
我的样本男女合用:
public Class MyWatcher:System.ComponentModel.Component，ISupportInitialize{
私有System.ComponentModel.Container组件= null;
FileSystemWatcher watcher = new FileSystemWatcher();
private void ReleaseEvents()
{
if(watcher！= null)
{
watcher.Renamed-= new RenamedEventHandler(fileRenamed);
&b watcher.Deleted-= new FileSystemEventHandler(fileDeleted);
watcher.Changed-=新的FileSystemEventHandler(fileChanged);
watcher.Created-= new FileSystemEventHandler(fileCreated);
}
}
///< summary>
///清理所有正在使用的资源.
///</summary>
//私人布尔处置= false;
受保护的覆盖无效void Dispose(布尔处置)
{
如果(处理)
{
if(watcher！= null)
{
ReleaseEvents();
watcher.Dispose();
}
if(components！= null)
{
components.Dispose();
}
}
base.Dispose(处置);
}
#region ISupport初始化成员
公共无效BeginInit()
{
}
public void EndInit()
{
this.fullpath =某些路径";
FileWatcher();
}
字符串fullpath = null;
字符串FullPath
{
得到{return fullpath; }
设置{fullpath = value; FileWatcher();}//
}
public void FileWatcher()
{
if(fullpath！= null)
{
watcher.Path = Path.GetDirectoryName(fullpath);
watcher.Filter = fileName;
watcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;
ReleaseEvents();
watcher.Renamed + = new RenamedEventHandler(fileRenamed);
watcher.Deleted + = new FileSystemEventHandler(fileDeleted);
watcher.Changed + =新的FileSystemEventHandler(fileChanged);
watcher.Created + = new FileSystemEventHandler(fileCreated);
watcher.EnableRaisingEvents = true;
}
}
void fileChanged(object sender，FileSystemEventArgs e)
{
ReadMethod(e.FullPath);
}
void fileCreated(对象发送者，FileSystemEventArgs e)
{
ReadMethod(e.FullPath);
}
void fileDeleted(对象发送者，FileSystemEventArgs e)
{
}
void fileRenamed(对象发送者，RenamedEventArgs e)
{
ReadMethod(e.FullPath);
}
私有无效ReadMethod(字符串路径)
{
//读取一些文本文件
}
}
I am developing a user control which needs to check file on every operation.For this i am using FileSystemWacther.
I need to initialize FileSystemWacther events in 2 places.
1)in EndInit();
2)in a Property FileNameChange
NotifyFilters: NotifyFilters.LastWrite | NotifyFilters.FileName |NotifyFilters.DirectoryName
now its producing duplicate events with FileSystemWacther.
how to avoid this please help me , thanks in advance.
My sample coed:
public Class MyWatcher : System.ComponentModel.Component,ISupportInitialize{
private System.ComponentModel.Container components = null;
FileSystemWatcher watcher = new FileSystemWatcher();
private void ReleaseEvents()
{
if (watcher != null)
{
watcher.Renamed -= new RenamedEventHandler(fileRenamed);
watcher.Deleted -= new FileSystemEventHandler(fileDeleted);
watcher.Changed -= new FileSystemEventHandler(fileChanged);
watcher.Created -= new FileSystemEventHandler(fileCreated);
}
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
// private bool disposed = false;
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (watcher != null)
{
ReleaseEvents();
watcher.Dispose();
}
if (components != null)
{
components.Dispose();
}
}
base.Dispose(disposing);
}
#region ISupportInitialize Members
public void BeginInit()
{
}
public void EndInit()
{
this.fullpath ="some Path";
FileWatcher();
}
string fullpath = null;
string FullPath
{
get { return fullpath; }
set { fullpath = value; FileWatcher();}//
}
public void FileWatcher()
{
if (fullpath != null)
{
watcher.Path = Path.GetDirectoryName(fullpath);
watcher.Filter = fileName;
watcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName |NotifyFilters.DirectoryName ;
ReleaseEvents();
watcher.Renamed += new RenamedEventHandler(fileRenamed);
watcher.Deleted += new FileSystemEventHandler(fileDeleted);
watcher.Changed += new FileSystemEventHandler(fileChanged);
watcher.Created += new FileSystemEventHandler(fileCreated);
watcher.EnableRaisingEvents = true;
}
}
void fileChanged(object sender, FileSystemEventArgs e)
{
ReadMethod(e.FullPath);
}
void fileCreated(object sender, FileSystemEventArgs e)
{
ReadMethod(e.FullPath);
}
void fileDeleted(object sender, FileSystemEventArgs e)
{
}
void fileRenamed(object sender, RenamedEventArgs e)
{
ReadMethod(e.FullPath);
}
private void ReadMethod(string path)
{
//reading some text File
}
}
推荐答案
您好，
图像控件如何更新图像更改.我在winform上有一个图像，如果我用另一个图像更新图像，那么它应该显示新图像.
但这如何工作?
与FileWatcher有什么关系以检查图像大小，位置吗? ，创建时间?
请帮帮我！
先谢谢了.
Hi,
how does image control updates image changes .
ex. i have an image on winform and if i update image with another image then it should display new image .
but how does this works?
is there anyhting to do with FileWatcher in order to check image size,location,creation time?
please help me!
thanks in advance.
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