使用FileSystemWatcher监控网络路径(包含源代码)

在VS2005中,.Net里面有个FileSystemWatcher控件,用来监控文件变化,它会通知文件创建,修改,删除的消息。网上这样的例子很多,但是在实际应用的时候,发现还有一些待处理的问题,我做了一个简单的demo,解决了如下的问题:
1. 多次连续触发 (通过一个定时器来解决)
2. 能监控网路路径 (serviceProcessInstaller的Account属性设置为NetworkService)
3. 通过windows service来实现, 做成安装文件方便注册服务

注意事项:
1. 切记网络路径要给guest的权限,否则监控不了。
2. 修改Service1代码中的watcher.Path。
3. 新建文件c:\test.log,将此文件设置为可写的权限。

4. 安装完成后手动将服务启动。

关键代码:
public   class  AdvancedFileSystemWatcher : System.IO.FileSystemWatcher
    
{
        
public event NetworkPathUnavailableEventHandler NetworkPathUnavailable;
        
public delegate void NetworkPathUnavailableEventHandler(string Message);
        
public event NetworkPathAvailableEventHandler NetworkPathAvailable;
        
public delegate void NetworkPathAvailableEventHandler(string Message);
        
private System.Timers.Timer _myTimer = new System.Timers.Timer();
        
private bool _isNetworkUnavailable = false;

        
public AdvancedFileSystemWatcher()
        
{
            _myTimer.Start();
        }



        
public AdvancedFileSystemWatcher(int iNetworkWatchInterval)
        
{
            
if (iNetworkWatchInterval > 0)
            
{
                _myTimer.Interval 
= iNetworkWatchInterval;
            }

            
else
            
{
                _myTimer.Interval 
= 2000;
            }

            _myTimer.Start();

        }


        
public void close()
        
{
            _myTimer.Stop();
            _myTimer.Dispose();

        }


        
private void _myTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        
{
            DirectoryInfo myFolder;

            
try
            
{
                myFolder 
= new DirectoryInfo(base.Path);
                
if (!_isNetworkUnavailable)
                
{
                    
if (!myFolder.Exists)
                    
{
                        _isNetworkUnavailable 
= true;
                        
if (NetworkPathUnavailable != null)
                        
{
                            NetworkPathUnavailable(
"A network error has occured or the path does not exist anymore");
                        }

                    }

                }

                
else
                
{
                    
if (myFolder.Exists)
                    
{
                        _isNetworkUnavailable 
= false;
                        
if (NetworkPathAvailable != null)
                        
{
                            NetworkPathAvailable(
"The network or path has been restored");
                        }

                    }

                }

            }

            
catch (Exception ex)
            
{
                
throw;
            }

            
finally
            
{
                myFolder 
= null;
            }


        }


    }


源代码下载:
/Files/binbin1845/FileWatchServiceTest.rar


你可能感兴趣的:(Watcher)