时间差的计算与显示(时、分、秒)
...
private System.Windows.Forms.TextBox elapsed_time;
...
DateTime t1 = DateTime.Now;
DateTime t2;
TimeSpan dt;
此处为程序运行代码.....
t2 = DateTime.Now;
dt = t2 - t1;
elapsed_time.Text=dt.ToString("hh:mm:ss");
编译错误提示:重载"ToString"方法未获取"1"参数