Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
128 views
in Technique[技术] by (71.8m points)

c# - what is the use of ()=> in silverllight

Can you say what is the use of the ()=> and =>? I saw this in a code. I did not get any reference for this.

this.Dispatcher.BeginInvoke(()=>
{
    //some thing..
};
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

=> is the lambda operator in C# and is read as "goes to". A lambda expression is an anonymous function and can be used to create a delegate.

Your example takes no arguments as indicated by the empty parens preceding the lambda operator. A lambda expression with one argument might look like this:

n => n.toString()

That expression would return the string representation of n, when invoked. A lambda expression can have multiple arguments as well, contained in parentheses:

(n, f) => n.toString(f)

A common use would be in a Func<T>:

Func<int, string> getString = n => n.toString();
int num = 7;
string numString = getString(num);

This is, of course, a silly example, but hopefully helps to illustrate its use.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

1.4m articles

1.4m replys

5 comments

57.0k users

...