参见英文答案 >
C# passing extra parameters to an event handler?8个
我想通过我的列表< string>作为使用我的事件的参数
我想通过我的列表< string>作为使用我的事件的参数
public event EventHandler _newFileEventHandler;
List<string> _filesList = new List<string>();
public void startListener(string directoryPath)
{
FileSystemWatcher watcher = new FileSystemWatcher(directoryPath);
_filesList = new List<string>();
_timer = new System.Timers.Timer(5000);
watcher.Filter = "*.pcap";
watcher.Created += watcher_Created;
watcher.EnableRaisingEvents = true;
watcher.IncludeSubdirectories = true;
}
void watcher_Created(object sender,FileSystemEventArgs e)
{
_timer.Elapsed += new ElapsedEventHandler(myEvent);
_timer.Enabled = true;
_filesList.Add(e.FullPath);
_fileToAdd = e.FullPath;
}
private void myEvent(object sender,ElapsedEventArgs e)
{
_newFileEventHandler(_filesList,EventArgs.Empty);;
}
从我的主要形式我想得到这个列表：
void listener_newFileEventHandler(object sender,EventArgs e)
{
}
解决方法
创建一个新的EventArgs类,如：
public class ListEventArgs : EventArgs
{
public List<string> Data { get; set; }
public ListEventArgs(List<string> data)
{
Data = data;
}
}
并使您的活动如下：
public event EventHandler<ListEventArgs> NewFileAdded;
protected void OnNewFileAdded(List<string> data)
{
var localCopy = NewFileAdded;
if (localCopy != null)
{
localCopy(this,new ListEventArgs(data));
}
}
当你想处理这个事件时：
myObj.NewFileAdded += new EventHandler<ListEventArgs>(myObj_NewFileAdded);
处理程序方法将如下所示：
public void myObj_NewFileAdded(object sender,ListEventArgs e)
{
// Do what you want with e.Data (It is a List of string)
}
