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c#asp.net.netread-write

read/write operation to text file from asp.net application

I am trying to read/write to text file located at the root of my website. I am using asp.net development server (my local machine).

When I read the file it's throwing this exception

Access to the path 'C:\Program Files\Common Files\Microsoft Shared\DevServer\10.0\error.txt' is denied.

I am using following lines of code to read/write from text file

 var text = File.ReadAllText(Server.MapPath("error.txt"));
    File.WriteAllText(@"error.txt", text + " \n " + "newnewnew text");

What is the problem, why my server.MapPath retrieving path of my c drive? When it should retrieve absolute path of my site, that is

website1/error.txt
Solution

  • If you change following line

    File.ReadAllText(Server.MapPath("error.txt"));

    to 

    File.ReadAllText(Server.MapPath("~/error.txt"));

    It will search file in root directory of application. If you have file stored in folder called "MyFiles" inside root directory then path will be something like below

    File.ReadAllText(Server.MapPath("~/MyFiles/error.txt"));

    Hope this helps.