appSetting in .Config file

[Mats-Lennart Hansson]

Hi,
In a windows service, I have some appSettings. If I during runtime changes
one of the values, is it availabele to the service from that moment? Or do I
have to restart the service before I can access the new value?

Ex.
I have this entry in my .config file:
<add key="Path" value="C:\test" />

and change it to:
<add key="Path" value="C:\someOtherFolder" />

Do I need to restart the service to be able to read the new value?

Thanks
/Mats-Lennart

[DarkSider]

it depends on when you read your values?

Normally if you read in the values at startup your service will not see
the changes in the config file.

but you can program a sort of loop in your application where it checks
if changes are made to the config file, but that is not a very clean
way to handle such things in my honest opinion.

Why do need this for? Maybe i can help.

[Peter Bromberg [C# MVP]]

Mats,
If you use the standard app.config arrangement where the config file gets
named myService.exe.config, the configuration file is automatically read one
time at startup. For dynamic updating, you need to add a separate
filesystemwatcher and probably keep your dynamic settings in a separate
config file. A change in that would trigger re-reading the file without
having to stop the service. Actually, I use database entries and SQL Cache
Dependency as an alternative to that.
Peter

--
Co-founder, Eggheadcafe.com developer portal:
http://www.eggheadcafe.com
UnBlog:
http://petesbloggerama.blogspot.com


"Mats-Lennart Hansson" wrote:

Hi,
In a windows service, I have some appSettings. If I during runtime changes
one of the values, is it availabele to the service from that moment? Or do I
have to restart the service before I can access the new value?

Ex.
I have this entry in my .config file:
<add key="Path" value="C:\test" />

and change it to:
<add key="Path" value="C:\someOtherFolder" />

Do I need to restart the service to be able to read the new value?

Thanks
/Mats-Lennart

[Kevin Spencer]

> but you can program a sort of loop in your application where it checks

if changes are made to the config file, but that is not a very clean
way to handle such things in my honest opinion.
No loop is necessary. The config files are cached when the app is started,
and when they are changed. There is no IO cost to reading directly from the
Application Configuration at any time during the lifetime of the app.

--
HTH,

Kevin Spencer
Microsoft MVP
..Net Developer
A brute awe as you,
a Metallic hag entity, eat us.
"DarkSider" <vo********@gmail.com> wrote in message
news:11**********************@t39g2000cwt.googlegr oups.com... it depends on when you read your values?

Normally if you read in the values at startup your service will not see
the changes in the config file.

but you can program a sort of loop in your application where it checks
if changes are made to the config file, but that is not a very clean
way to handle such things in my honest opinion.

Why do need this for? Maybe i can help.

[Kevin Spencer]

Which version of the Framework are you using?

--
HTH,

Kevin Spencer
Microsoft MVP
..Net Developer
A brute awe as you,
a Metallic hag entity, eat us.
"Mats-Lennart Hansson" <ap********@hotmail.com> wrote in message
news:ub**************@TK2MSFTNGP14.phx.gbl...

Hi,
In a windows service, I have some appSettings. If I during runtime changes
one of the values, is it availabele to the service from that moment? Or do
I have to restart the service before I can access the new value?

Ex.
I have this entry in my .config file:
<add key="Path" value="C:\test" />

and change it to:
<add key="Path" value="C:\someOtherFolder" />

Do I need to restart the service to be able to read the new value?

Thanks
/Mats-Lennart

[Peter Bromberg [C# MVP]]

Here is a post from Junfeng Zhang that may help to clear all this up:

http://blogs.msdn.com/junfeng/archiv...20/376880.aspx
Peter
--
Co-founder, Eggheadcafe.com developer portal:
http://www.eggheadcafe.com
UnBlog:
http://petesbloggerama.blogspot.com


"Mats-Lennart Hansson" wrote:

Hi,
In a windows service, I have some appSettings. If I during runtime changes
one of the values, is it availabele to the service from that moment? Or do I
have to restart the service before I can access the new value?

Ex.
I have this entry in my .config file:
<add key="Path" value="C:\test" />

and change it to:
<add key="Path" value="C:\someOtherFolder" />

Do I need to restart the service to be able to read the new value?

Thanks
/Mats-Lennart

[Mats-Lennart Hansson]

Thanks, that's exactly what I was looking for. Unfortunately, the
functionality wasn't what I hoped for. But hey, that's life :)

Thanks to all that responded.

/Mats-Lennart

"Peter Bromberg [C# MVP]" <pb*******@yahoo.nospammin.com> wrote in message
news:CB**********************************@microsof t.com...

Here is a post from Junfeng Zhang that may help to clear all this up:

http://blogs.msdn.com/junfeng/archiv...20/376880.aspx
Peter
--
Co-founder, Eggheadcafe.com developer portal:
http://www.eggheadcafe.com
UnBlog:
http://petesbloggerama.blogspot.com


"Mats-Lennart Hansson" wrote:

Hi,
In a windows service, I have some appSettings. If I during runtime
changes
one of the values, is it availabele to the service from that moment? Or
do I
have to restart the service before I can access the new value?

Ex.
I have this entry in my .config file:
<add key="Path" value="C:\test" />

and change it to:
<add key="Path" value="C:\someOtherFolder" />

Do I need to restart the service to be able to read the new value?

Thanks
/Mats-Lennart