C # create your own extension method,

C # create your own extension method,

C # you can create your own Extension Method:

Refer to this http://www.cnblogs.com/insus/p/8004097.html to determine whether it is empty and then assign value

In the preceding three methods, the keyword null appears. When judging, You Need To = null or! = Null.

In fact, you can create a C # extension method to eliminate this complexity.

 

 

Public static class ExtensionMethod {public static bool IsNull (this object obj) {return obj = null;} public static bool IsNotNull (this object obj) {return obj! = Null;} Source Code

Therefore, Method 5 can be generated in the previous article:

 

Result = str. IsNull ()? "": Str; result = str. IsNotNull ()? Str: ""; Source Code