如何创建一个异步方法 [英] How to create an asynchronous method
问题描述
我有简单的方法在我的C#应用程序,它从FTP服务器上挑选文件,并对其进行解析,并在数据库中存储的数据。我想这是异步的,因此该用户进行应用上的其他操作,一旦解析完成他已经得到消息,指出解析完成。
I have simple method in my C# app, it picks file from FTP server and parses it and stores the data in DB. I want it to be asynchronous, so that user perform other operations on App, once parsing is done he has to get message stating "Parsing is done".
我知道它可以通过异步方法调用实现,但我不知道该怎么做任何人可以帮我请??
I know it can achieved through asynchronous method call but I dont know how to do that can anybody help me please??
推荐答案
您需要使用代表和它们包含的异步运行的另一种方法的的BeginInvoke
方法。该方法的结束被委托运行,可以通知用户。例如:
You need to use delegates and the BeginInvoke
method that they contain to run another method asynchronously. A the end of the method being run by the delegate, you can notify the user. For example:
class MyClass
{
private delegate void SomeFunctionDelegate(int param1, bool param2);
private SomeFunctionDelegate sfd;
public MyClass()
{
sfd = new SomeFunctionDelegate(this.SomeFunction);
}
private void SomeFunction(int param1, bool param2)
{
// Do stuff
// Notify user
}
public void GetData()
{
// Do stuff
sfd.BeginInvoke(34, true, null, null);
}
}
在<一起来阅读href=\"http://msdn.microsoft.com/en-us/library/2e08f6yc.aspx\">http://msdn.microsoft.com/en-us/library/2e08f6yc.aspx
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