原来···是不是高手，看try cathch都能看出来···

先看一段代码：

View Code

 1     internal class ThrowAndThrowEx
 2     {
 3         public static void Test ()
 4         {
 5             Class1.DoSomething();
 6         }
 7     }
 8 
 9 
10     public class Class1
11     {
12         public static void DoSomething ()
13         {
14             try
15             {
16                 Class2.DoSomething();
17             }
18             catch (Exception ex)
19             {
20                 //throw;
21                 throw new Exception("class1 call class2", ex);
22 
23             }
24         }
25     }
26 
27 
28     public class Class2
29     {
30         public static void DoSomething ()
31         {
32             try
33             {
34                 Class3.DoThrowOrThrowEx();
35             }
36             catch (Exception ex)
37             {
38                 throw;
39                 //throw ex;
40             }
41         }
42 
43 
44     }
45 
46 
47     public class Class3
48     {
49         public static void DoThrowOrThrowEx ()
50         {
51             try
52             {
53                 int divider = 0;
54                 int number = 5 / divider;
55             }
56             catch (Exception ex)
57             {
58                 throw ex;
59                 //throw;
60             }
61         }
62 
63     }

 

 

如此来看 

 

可以在一些关键的分层次的地方使用:

                throw new Exception("class1 call class2", ex);

其他地方使用:

                throw;

 

转载于:https://www.cnblogs.com/scottgu/archive/2011/11/10/2244498.html