Web Service can't write to c:\windows\syst em32???

[redneon]

I'm trying to write a web service which, when run, writes a line to a file on
the web server. I've created one under IIS and the method I'm calling looks
like this...

[WebMethod]
public string HelloWorld()
{
try
{
//Server.MapPath( "testfile.txt") ;
StreamWriter fileStream = new StreamWriter("t estfile.txt", false);
fileStream.Writ eLine("Testing Testing Testing!");
fileStream.Flus h();
fileStream.Clos e();
}
catch(Exception ex)
{
return ("Error: " + ex);
}
return "Hello World";
}

But when I compile and run this in VS .NET I get the following output...

<?xml version="1.0" encoding="utf-8" ?>
<string xmlns="http://tempuri.org/">Error:
System.Unauthor izedAccessExcep tion: Access to the path
"C:\WINDOWS\sys tem32\testfile. txt" is denied. at
System.IO.__Err or.WinIOError(I nt32 errorCode, String str) at
System.IO.FileS tream..ctor(Str ing path, FileMode mode, FileAccess access,
FileShare share, Int32 bufferSize, Boolean useAsync, String msgPath, Boolean
bFromProxy) at System.IO.FileS tream..ctor(Str ing path, FileMode mode,
FileAccess access, FileShare share, Int32 bufferSize) at
System.IO.Strea mWriter.CreateF ile(String path, Boolean append) at
System.IO.Strea mWriter..ctor(S tring path, Boolean append, Encoding encoding,
Int32 bufferSize) at System.IO.Strea mWriter..ctor(S tring path, Boolean
append) at CPWebService.Se rvice1.HelloWor ld() in
c:\inetpub\wwwr oot\cpwebservic e\service1.asmx .cs:line 61</string>

Why is it trying to write to System32? And why wont it work? I've tried
setting the ASP .NET user account to Administrator and I've tried changing
all the Runtime Security Policies in the .NET Configuration in Administrative
Tools to Full Trust (yes I know how bad this is but I will sort that out
later) but I still get the same message.

Just in case it makes a difference. I'm running IIS on Windows XP
Professional with SP2.

Any ideas?

Darrell

[Jon Skeet [C# MVP]]

redneon <re*****@discus sions.microsoft .com> wrote:

I'm trying to write a web service which, when run, writes a line to a file on
the web server. I've created one under IIS and the method I'm calling looks
like this...

[WebMethod]
public string HelloWorld()
{
try
{
//Server.MapPath( "testfile.txt") ;
StreamWriter fileStream = new StreamWriter("t estfile.txt", false);
fileStream.Writ eLine("Testing Testing Testing!");
fileStream.Flus h();
fileStream.Clos e();
}
catch(Exception ex)
{
return ("Error: " + ex);
}
return "Hello World";
}

But when I compile and run this in VS .NET I get the following output...
<snip>
Why is it trying to write to System32?
Because that's the working directory of the process, I suspect.
And why wont it work?

Don't try to get it to work. Change where it's writing to. You don't
*really* want to write to System32, do you? That's unspeakably nasty.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too