初识IO流——IO流实战之记录错误日志

 1 protected void Page_Load(object sender, EventArgs e)
 2         {
 3 
 4             string test_str = "I see you ！";
 5 
 6             try
 7             {
 8 
 9                 Int32 test_num = Convert.ToInt32(test_str);
10 
11             }
12             catch (Exception ex)
13             {
14 
15                 getErrorMessage(ex.ToString());
16 
17             }
18         }
19 
20 
21 
22 
23 
24         public static void getErrorMessage(string errorMessage)
25         {
26             try
27             {
28                 /*相对路径（文件相对于项目）*/
29                 string outfile = "/Error/" + "Error-" + DateTime.Today.ToString("yyyy-MM-dd") + ".txt";
30 
31                 /*获取项目的根目录并和outfile组合成文件的完整路径*/
32                 string path = AppDomain.CurrentDomain.BaseDirectory + outfile;
33 
34                 /*判断文件是否存在，如果不存在则创建*/
35                 if (!File.Exists(path))
36                 {
37                     File.Create(path).Close();
38                 }
39                 using (StreamWriter writer = File.AppendText(path))
40                 {
41                     /*写入自定义的数据和获取到的异常信息*/
42                     writer.WriteLine("ErrorMessage: ");
43                     writer.WriteLine("Time: {0}", DateTime.Now.ToString("yyyy/MM/dd  hh:mm:ss"));
44                     writer.WriteLine("Url: {0}", System.Web.HttpContext.Current.Request.Url.ToString());
45                     writer.WriteLine("Detial: {0}", errorMessage);
46                     writer.WriteLine("————————————————————————————————————————————————————————————————————");
47                 }
48             }
49             catch (Exception ex)
50             {
51                 getErrorMessage(ex.ToString());
52             }
53         }