Declare a proxy approach, no parameters,
Public delegate void FileChangeDelegate ();


Place called
Private void RegisterFileWatch (FileReadRequest request, FileChangeDelegate onChanged)
{
FileWatch. Changed -=new FileSystemEventHandler (onChanged);//here
}
//new FileSystemEventHandler need such parameters method agent (object source, FileSystemEventArgs e)
//is there any way to further under the packaging, let the incoming onChanged don't need to define the parameters?

CodePudding user response:

You this writing is not only a trouble, and the object (logical) is incorrect,

First of all, the traditional method of a complete statement of registration, cancellation method:

 private void test (object sender, EventArgs e) 
{
Cs. MessageReceived -=Cs_MessageReceived; 
} 

[code=csharp] private void Cs_MessageReceived (object sender, MessageReceivedEventArgs r) 
{
. 
} 

[/code] c # compiler realized here method is a static method,

And the delegate object generated by the dynamic, you will need to manually save your code, for example:

 Action The CSV. 

Private void test1 (object sender, EventArgs e) 
{
CSV=new Action ((s, arg)=& gt; 
{
. 
}); 
Cs. MessageReceived +=CSV; 
} 

Private void test2 (object sender, EventArgs e) 
{
If (CSV!=null) 
Cs. MessageReceived -=CSV; 
} 

Here, you'll have to entrust the statement as object, and then use "accurate object instance" to register, log off,