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
332 views
in Technique[技术] by (71.8m points)

c# - How to create extension methods for Types

I am writing an extension method for parsing JSON string for any given type. I wanted to use the method on types instead of instances like many examples we already know, but I somewhat feel it is not supported by Visual Studio. Can someone enlighten me here? The following is the method:

public static T ParseJson<T>(this T t, string str) where T: Type
{
    if (string.IsNullOrEmpty(str)) return null;
    var serializer = new JavaScriptSerializer();
    var obj = serializer.Deserialize<T>(str);
    return obj;
}

I want to call the method in this fashion:

var instance = MyClass.ParseJson(text);

Thanks

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)

The short answer is it cannot be done; extension methods need to work on an instance of something.


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

...