To get the file name in string

问题

I have stored JSON file in my project folder externally by the following code,

 System.IO.File.WriteAllText(System.Web.HttpContext.Current.Server.MapPath("JSON.json"), jSearializer.Serialize(modified_listofstrings));

but now in another method I want to read only name of that file, how I am suppose to do that,

if I read the file in string, I get the content of the file but I just want the name of the file by which it is stored.

Any help will be greatly appreciated.

--- Edited question--- includes the code for filename.

string filename = ID.Replace(".", "_");
System.IO.File.WriteAllText(System.Web.HttpContext.Current.Server.MapPath(filename+".json"), jSearializer.Serialize(modified_listofstrings));

回答1:

You can save ID in user's session, and in another method access it:

Session["FileName"] = filename;

and in your other method:

string fileName = Session["FileName"];

You can access session via:

System.Web.HttpContext.Current.Session

回答2:

One solution would be to use the classes in System.IO namespace.

There are various ways of doing it. Below i have taken the virtual directory using MapPath and i search for files ending with '.json'. This should get you the file names

string path =  System.Web.HttpContext.Current.Server.MapPath("/");
string[] files = Directory.GetFiles(path, "*.json");

来源：https://stackoverflow.com/questions/19995251/to-get-the-file-name-in-string