private void write_txt(string str1, string str2, string str3)
{
System.DateTime currentTime = System.DateTime.Now;
string strYMD = currentTime.ToString("d");
string FILE_NAME = "MyFileSend" + strYMD + ".txt";
StreamWriter sr;
if (File.Exists(FILE_NAME))
{
sr = File.AppendText(FILE_NAME);
}
else
{
sr = File.CreateText(FILE_NAME);
}
sr.WriteLine(str1 + " " + str2 + " " + DateTime.Now.ToString("yyyy-mm-dd hh:mm:ss") +
" " + str3 + "\r\n");
sr.Close();
}
