C#文件的读写的几种方式

1             if (File.Exists(importPath))
2             {
3                 string readText = File.ReadAllText(importPath);  //读取的结果包含了\r\n
4                 string[] lineList1 = File.ReadAllLines(importPath); 
5             }

 1 List<string> lineList2 = new List<string>(); 
 2 //ArrayList linesList2 = new ArrayList(); //
 3 
 4 StreamReader sr = new StreamReader(importPath);
 5 string Oneline= sr.ReadLine();  //读当前一行
 6 
 7 while (!sr.EndOfStream)
 8 {
 9     lineList2.Add(sr.ReadLine());
10 }
11 sr.Close();
12 
13 if (lineList2.Count > 0)
14 {
15     for (int i = 0; i )
16     {
17         string line = lineList2[i].ToString();
18         string regex = ",|，|\\s+";
19         string[] split = Regex.Split(line, regex);
20     }
21 }

1             string exportPath1 = "F:\\Upload\\ReadAndWriteFile\\streamreader1.txt";
2             FileStream fs1 = new FileStream(exportPath1, FileMode.OpenOrCreate);
3             byte[] data = new UTF8Encoding().GetBytes("aaaa");
4             fs1.Write(data, 0, data.Length);
5             fs1.Flush();
6             fs1.Close();

 1             #region 构造数据 dt
 2             DataTable dt = new DataTable();
 3             dt.Columns.Add("player");
 4             dt.Columns.Add("race");
 5             DataRow row = null;
 6             for (int i = 0; i <5; i++)
 7             {
 8                 row = dt.NewRow();
 9                 row["player"] = "name_" + i;
10                 row["race"] = "race_" + i;
11                 dt.Rows.Add(row);
12             }
13             #endregion
14 
15             string exportPath2 = "F:\\Upload\\ReadAndWriteFile\\streamreader2.txt";
16             FileStream fs2 = new FileStream(exportPath2, FileMode.OpenOrCreate);
17             StreamWriter sw2 = new StreamWriter(fs2);
18             StringBuilder sb = new StringBuilder();
19             sb.Append("选手           种族\r\n");
20             foreach (DataRow dr in dt.Rows)
21             {
22                 sb.Append(dr["player"] + "           " + dr["race"] + "\r\n");
23             }
24             sw2.Write(sb);
25             sw2.Flush();
26             sw2.Close();
27             fs2.Close();