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Parase 如果不能满足转换条件,抛出异常;

TrypParase 如果不能满足条件返回false,同时将值置为0

性能比较
 1  double de;
 2             long ticks;
 3             Stopwatch watch = Stopwatch.StartNew();
 4             for (int i = 0; i < 100; i++)
 5             {
 6                 try
 7                 {
 8                     de = double.Parse("123");
 9                 }
10                 catch (Exception ex)
11                 {
12 
13                     de = 0;
14                 }
15             }
16             watch.Stop();
17             ticks = watch.ElapsedTicks;
18             Console.WriteLine("double.Parase()成功,{0} Ticks", ticks);
19             watch = Stopwatch.StartNew();
20             for (int i = 0; i < 100; i++)
21             {
22                 if (!double.TryParse("123", out de))
23                 {
24                     de = 0;
25                 }
26             }
27             watch.Stop();
28             ticks = watch.ElapsedTicks;
29             Console.WriteLine("double.TryParase(),{0} Ticks", ticks);
30             watch = Stopwatch.StartNew();
31             for (int i = 0; i < 100; i++)
32             {
33                 try
34                 {
35                     de = double.Parse("abc");
36                 }
37                 catch (Exception ex)
38                 {
39 
40                     de = 0;
41                 }
42             }
43             watch.Stop();
44             ticks = watch.ElapsedTicks;
45             Console.WriteLine("double Parase() errors,{0} Ticks",ticks);
46             watch = Stopwatch.StartNew();
47             for (int i = 0; i < 100; i++)
48             {
49                 if (!double.TryParse("abc", out de))
50                 {
51                     de = 0;
52                 }
53             }
54             watch.Stop();
55             ticks = watch.ElapsedTicks;
56             Console.WriteLine("double Parase() errors,{0} Ticks", ticks);

 

posted on 2013-01-05 09:37  梦里故乡  阅读(473)  评论(0编辑  收藏  举报