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。
dy("nrwz");