TryParse比Parse好

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 1    double re;
 2             long ticks;
 3 
 4             Stopwatch sw = Stopwatch.StartNew();
 5             for (int i = 0; i < 1000; i++)
 6             {
 7                 try
 8                 {
 9                     re = double.Parse("123");
10                 }
11                 catch (Exception)
12                 {
13                     re = 0;
14                 }
15             }
16 
17             sw.Stop();
18             ticks = sw.ElapsedTicks;
19             Console.WriteLine("double.parse()成功,{0} ticks", ticks);
20 
21             sw = Stopwatch.StartNew();
22             for (int i = 0; i < 1000; i++)
23             {
24                 if (!double.TryParse("123", out re))
25                 {
26                     re = 0;
27                 }
28             }
29 
30             sw.Stop();
31             ticks = sw.ElapsedTicks;
32             Console.WriteLine("double.TryParse()成功,{0} ticks", ticks);
33 
34 
35 
36               sw = Stopwatch.StartNew();
37             for (int i = 0; i < 1000; i++)
38             {
39                 try
40                 {
41                     re = double.Parse("aaa");
42                 }
43                 catch (Exception)
44                 {
45                     re = 0;
46                 }
47             }
48 
49             sw.Stop();
50             ticks = sw.ElapsedTicks;
51             Console.WriteLine("double.parse()失败,{0} ticks", ticks);
52 
53             sw = Stopwatch.StartNew();
54             for (int i = 0; i < 1000; i++)
55             {
56                 if (!double.TryParse("aaa", out re))
57                 {
58                     re = 0;
59                 }
60             }
61 
62             sw.Stop();
63             ticks = sw.ElapsedTicks;
64             Console.WriteLine("double.TryParse()失败,{0} ticks", ticks);


结果：
posted on 2013-04-29 11:23 c#学习(开发）阅读(227) 评论(0) 收藏举报
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