本文实例讲述了C#简单读写txt文件的方法。分享给大家供大家参考，具体如下：

//write txt StringBuilder builder = new StringBuilder(); FileStream fs = new FileStream(saveFileName, FileMode.Create); StreamWriter sw = new StreamWriter(fs, Encoding.Default); for (int i = 0; i < ds.Tables[0].Rows.Count; i++) { DataRow dr = ds.Tables[0].Rows[i]; builder.AppendLine(dr["netsn"] + "," + dr["imei"]); //产品S/N号 + IMEI号 } sw.Write(builder); sw.Close(); fs.Close(); if (System.IO.File.Exists(saveFileName)) { System.Diagnostics.Process.Start(saveFileName); //保存成功后打开此文件 } //read txt string[] allLines = File.ReadAllLines(filePath);

希望本文所述对大家C#程序设计有所帮助。