%LOCALAPPDATA% dosen't work in app.config

Question

<?xml version="1.0"?>
<configuration>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6"/>
  </startup>
  <system.diagnostics>
    <trace autoflush="true" indentsize="1">
      <listeners>
        <add name="myListener" type="System.Diagnostics.TextWriterTraceListener" initializeData="%LOCALAPPDATA%\DBLog\application.log">          
          <filter type="System.Diagnostics.EventTypeFilter" initializeData="Verbose"/>
        </add>
      </listeners>
    </trace>
  </system.diagnostics>
</configuration>

How does I solve the problem with %LOCALAPPDATA% not working in my app.config, I need to able to configure inside a xml file. Not in the code if possible. It's the

score 2 · Answer 1 · answered Sep 03 '15 at 05:45

2

Please try this ${LOCALAPPDATA}

answered Sep 03 '15 at 05:45

Kapoor

1,388
11
21

@4thex which .net verison ? – Kapoor Mar 20 '19 at 14:00
My comment was about using it inside system.diagnostics. It will not resolve an environment variable inside the initializeData attribute. The .NET Framework version I am using is 4.5.2. – 4thex Mar 21 '19 at 14:13

score 2 · Answer 2 · edited May 23 '17 at 10:28

2

%LOCALAPPDATA% dosen't work in app.config

It doesn not seem to work. See related question here or here.

I suggest you the following:

If you wanna use the ${VARIABLE} syntax you should try log4net. There is a great tutorial on codeplex.
Else you have to expand your environment variables and create your trace listeners in code.

edited May 23 '17 at 10:28

Community

1
1

answered Dec 08 '15 at 13:06

Marschal

173
2
11

score 1 · Answer 3 · answered Sep 03 '15 at 05:50

1

Please try to modify your code to this :

initializeData="${LOCALAPPDATA}\DBLog\application.log"

answered Sep 03 '15 at 05:50

– Ravi Khambhati Oct 04 '17 at 21:08

%LOCALAPPDATA% dosen't work in app.config

3 Answers3