Asp.net c＃ - 检查文件是否存在失败

Question

I have a project where I want to check if a file exist in a directory.

if (File.Exists("\\Galerija\\" + Session["up_ime"] + "\\" + Session["slika_profila"]))
{
  Label1.Text = "exist";
}
else {
  Label1.Text = "does not exist";
}

The directory of the file is \\Galerija\\admin\\slika.jpg . The file is in the directory, but I get returned that it doesn't. I also printed the path I give to File.Exists() to the label and it should be correct. I don't see what is the problem. -The file should be found.

Answer 1

In your comments you mentioned this is web site. So try with Server.MapPath

if (File.Exists(Server.MapPath(string.Format("Galerija/{0}/{1}" ,Session["up_ime"] , Session["slika_profila"]))))
{
     Label1.Text = "exist";

}

Answer 2

Your relative path should be incorrect, Use Server.MapPath("your relative path to root folder") instead of direct relative path,

In your case, use

if (File.Exists(Server.MapPath("\\Galerija\\" + Session["up_ime"] + "\\" + Session["slika_profila"])))
        {
            Label1.Text = "exist";

        }
        else
        {
            Label1.Text = "does not exist";
        }

You can find more info here,

http://msdn.microsoft.com/en-us/library/system.web.httpserverutility.mappath.aspx

Answer 3

If you're still not able to figure out what is wrong, you should use procmon.exe to find out the path that the file is being looked up at. It will also show you the errors if there are any. procmon outputs a lot of information, but the filter functionality can help you here.

Download it here - http://technet.microsoft.com/en-us/sysinternals/bb896645.aspx