c# - 将日期添加到文件名时的 StreamWriter 问题

Question

我在使用 System.IO.StreamWriter 时遇到了一个小问题。

StreamWriter Write = 
   new StreamWriter(@"../Debug/Payments/_" + dp.Value.ToString() + ".txt");

当我运行应用程序时，它返回:

An unhandled exception of type 'System.NotSupportedException' occurred in mscorlib.dll Additional information: The given path's format is not supported.

Answer 1

试试这个:

string filename= DateTime.Now.ToString("yyyy_MM_dd");
string strpath = Server.MapPath("~/Debug/Payments/_"+ filename + ".txt");
StreamWriter Write = new StreamWriter(strpath);

您的问题出在格式上。