How to store values in app.config or settings.cs

[=?Utf-8?B?Sm9u?=]

Hello,
I have tried to use the app.config and settings.cs files to store my data
(which I want to be user changeable at runtime). I can write to (what I
assume is an object in memory) and it does seem to work...however, once the
application is closed and reopened the changes are lost. How do I persist
the information?


Here is some sample code using both methods:
//////Using Properties.Sett ings///////
//get the key from Properties.Sett ings
string myPropertiesSet ting = (string)Propert ies.Settings.De fault["myKey"];
//This line seems to only set the value in memory and not in the file.
Properties.Sett ings.Default["myKey"] = "myNewValue ";
//myPropertiesSet ting will now be equal to "myNewValue "
myPropertiesSet ting = (string)Propert ies.Settings.De fault["myKey"];
//things look good, except when I restart the application the new value
//was not stored in the settings.cs file.


//////Using ConfigurationMa nager.AppSettin gs///////
NameValueCollec tion appSettings = ConfigurationMa nager.AppSettin gs;
//get the key from ConfigurationMa nager.AppSettin gs
String myAppSetting = appSettings["myKey"];
//This line seems to only set the value in memory and not in the file.
appSettings["myKey"] = "myNewValue ";
//appSettings will now be equal to "myNewValue "
myAppSetting = appSettings["myKey"];
//things look good, except when I restart the application the new value
//was not stored in the app.config file.
Thanks,
Jon

[=?Utf-8?B?Q2lhcmFuIE8nJ0Rvbm5lbGw=?=]

RE: How to store values in app.config or settings.cs

I know this might not be the recommended way of doing it, but I normally
create a a project for configuration objects which I mark as Serializable. I
then serialize the objects out of and into xml in a file in the same folder
as my app.
I make a class like AppConfiguratio n which has app settings. Then I make
other classes for specific settings for specific parts of the app and add a
property for it to AppConfiguratio n. I make AppConfiguratio n a singleton and
have it load and save itself automatically with the XmlSerializer, you can
even precompile the XmlSerializatio n assemblies for it.
This is a basic description, let me know if you like the general idea and
I'll slap a demo of it up on my blog.


--
Ciaran O''Donnell

http://wannabedeveloper.spaces.live.com

"Jon" wrote:

Hello,
I have tried to use the app.config and settings.cs files to store my data
(which I want to be user changeable at runtime). I can write to (what I
assume is an object in memory) and it does seem to work...however, once the
application is closed and reopened the changes are lost. How do I persist
the information?
>
>
Here is some sample code using both methods:
//////Using Properties.Sett ings///////
//get the key from Properties.Sett ings
string myPropertiesSet ting = (string)Propert ies.Settings.De fault["myKey"];
//This line seems to only set the value in memory and not in the file.
Properties.Sett ings.Default["myKey"] = "myNewValue ";
//myPropertiesSet ting will now be equal to "myNewValue "
myPropertiesSet ting = (string)Propert ies.Settings.De fault["myKey"];
//things look good, except when I restart the application the new value
//was not stored in the settings.cs file.
>
>
//////Using ConfigurationMa nager.AppSettin gs///////
NameValueCollec tion appSettings = ConfigurationMa nager.AppSettin gs;
//get the key from ConfigurationMa nager.AppSettin gs
String myAppSetting = appSettings["myKey"];
//This line seems to only set the value in memory and not in the file.
appSettings["myKey"] = "myNewValue ";
//appSettings will now be equal to "myNewValue "
myAppSetting = appSettings["myKey"];
//things look good, except when I restart the application the new value
//was not stored in the app.config file.
Thanks,
Jon
>
>

[G.S.]

Re: How to store values in app.config or settings.cs

On Sep 29, 10:13 pm, Jon <J...@discussio ns.microsoft.co mwrote:

Hello,
I have tried to use the app.config and settings.cs files to store my data
(which I want to be user changeable at runtime).  I can write to (what I
assume is an object in memory) and it does seem to work...however, once the
application is closed and reopened the changes are lost.  How do I persist
the information?
>
Here is some sample code using both methods:
//////Using Properties.Sett ings///////
//get the key from Properties.Sett ings
string myPropertiesSet ting = (string)Propert ies.Settings.De fault["myKey"];
//This line seems to only set the value in memory and not in the file.
Properties.Sett ings.Default["myKey"] = "myNewValue ";
//myPropertiesSet ting will now be equal to "myNewValue "
myPropertiesSet ting = (string)Propert ies.Settings.De fault["myKey"];
//things look good, except when I restart the application the new value
//was not stored in the settings.cs file.
>
//////Using ConfigurationMa nager.AppSettin gs///////
NameValueCollec tion appSettings = ConfigurationMa nager.AppSettin gs;
//get the key from ConfigurationMa nager.AppSettin gs
String myAppSetting = appSettings["myKey"];
//This line seems to only set the value in memory and not in the file.
appSettings["myKey"] = "myNewValue ";
//appSettings will now be equal to "myNewValue "
myAppSetting = appSettings["myKey"];
//things look good, except when I restart the application the new value
//was not stored in the app.config file.
Thanks,
Jon

I have found this article (and its links) to provide helpful
information in that direction

http://www.codeproject.com/KB/dotnet/mysteriesofconfiguration.aspx

[=?Utf-8?B?Sm9u?=]

RE: How to store values in app.config or settings.cs



"Ciaran O''Donnell" wrote:

I know this might not be the recommended way of doing it, but I normally
create a a project for configuration objects which I mark as Serializable. I
then serialize the objects out of and into xml in a file in the same folder
as my app.
I make a class like AppConfiguratio n which has app settings. Then I make
other classes for specific settings for specific parts of the app and add a
property for it to AppConfiguratio n. I make AppConfiguratio n a singleton and
have it load and save itself automatically with the XmlSerializer, you can
even precompile the XmlSerializatio n assemblies for it.
This is a basic description, let me know if you like the general idea and
I'll slap a demo of it up on my blog.
>
>
--
Ciaran O''Donnell

http://wannabedeveloper.spaces.live.com

>
>
"Jon" wrote:
>

Hello,
I have tried to use the app.config and settings.cs files to store my data
(which I want to be user changeable at runtime). I can write to (what I
assume is an object in memory) and it does seem to work...however, once the
application is closed and reopened the changes are lost. How do I persist
the information?


Here is some sample code using both methods:
//////Using Properties.Sett ings///////
//get the key from Properties.Sett ings
string myPropertiesSet ting = (string)Propert ies.Settings.De fault["myKey"];
//This line seems to only set the value in memory and not in the file.
Properties.Sett ings.Default["myKey"] = "myNewValue ";
//myPropertiesSet ting will now be equal to "myNewValue "
myPropertiesSet ting = (string)Propert ies.Settings.De fault["myKey"];
//things look good, except when I restart the application the new value
//was not stored in the settings.cs file.


//////Using ConfigurationMa nager.AppSettin gs///////
NameValueCollec tion appSettings = ConfigurationMa nager.AppSettin gs;
//get the key from ConfigurationMa nager.AppSettin gs
String myAppSetting = appSettings["myKey"];
//This line seems to only set the value in memory and not in the file.
appSettings["myKey"] = "myNewValue ";
//appSettings will now be equal to "myNewValue "
myAppSetting = appSettings["myKey"];
//things look good, except when I restart the application the new value
//was not stored in the app.config file.
Thanks,
Jon

Thanks Ciaran,
I would love an example of what you are talking about if you have time
to provide it. But, I really was wanting to use the built in C# framework
for this because it can do a ton of work I unless it doesn't do what I need,
I don't want to have to roll my own code. (although I would love to know how
just in case I need to : )
BTW, I think I did figure out how to use the ConfigurationMa nager class
to save to the file although I wish there was a replace() instead of just a
remove() and an add()..here is the code I came up with, let me know if you
have any better suggestions : ) Thanks again.
Jon

Configuration myConfigObject =
ConfigurationMa nager.OpenExeCo nfiguration(Con figurationUserL evel.None);

//try to read the value...should be null the first time and then have a
value after that
KeyValueConfigu rationElement rootKVE =
myConfigObject. AppSettings.Set tings["rootDrive"];

myConfigObject. AppSettings.Set tings.Remove("r ootDrive");

myConfigObject. AppSettings.Set tings.Add(new
KeyValueConfigu rationElement(" rootDrive", "J:\\"));

myConfigObject. Save();