使用相对路径使用C＃在Visual Studio中打开Excel文件

Question

I seem to be having a problem opening an excel file with a relative path in visual studio. The file is being saved to:

C:\Users\UserName\Documents\Filename.xls

on any machine. I have tried using:

Process.Start(@"~\Documents\Filename.xls");

to open the excel file, but it throws an error saying the file location cannot be found. Is there something I am doing wrong? Thank you in advance.

Answer 1

The '~' character is used in Linux.

With the following code you can obtain the path for special folders:

Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) 

The MyDocuments can be replaced for other Windows specific folder like:

• UserProfile
• MyPictures
• Desktop

Answer 2

'~' is not a valid path identifier in Windows (It does refer to the home directory on *nix). I am not sure what you are trying to achieve, but perhaps you want SpecialFolder see description here at MSDN ?

var path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);

Will return: C:\\Users\\'UserName'\\Documents\\

Answer 3

You could use combine to get the full path

var folderPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
var fullPath.Combine(folderPath, "filename.xls");
Process.Start(fullPath);

If you know the relative path to the working folder use

var fullPath = Path.GetFullPath(relPath);