ASP.NET:路径。与相对路径结合

你在找 MapPath 方法。

// get the path in the local file system that corresponds to ~/Uploads/Images
string localPath = HttpContext.Current.Server.MapPath("~/Uploads/Images/");

与路径一起使用。合并以创建文件路径:

string fileName = Path.Combine(
                      HttpContext.Current.Server.MapPath("~/Uploads/Images/"),
                      "filename.ext");
using (FileStream stream = File.OpenRead(fileName))
{
   // read the file
}