changing configuration file at runtime

I want to ask how to modify the configuration file
(windowapplication.exe.config) at runtime and keep this setting for the next
time the program start?

epederiva
Tue Sep 09 03:05:49 CDT 2003

This example update app.config file (in the main project) . I think this it
will be useful to you:

Common.Utility.UpdateAppConfig("LastChange",DateTime.Now.ToString());

where

public static void UpdateAppConfig(string strKey, string strValue)

{

System.Reflection.Assembly Asm =
System.Reflection.Assembly.GetExecutingAssembly();

string strConfigLoc=Asm.Location.ToString();





string strTemp = System.IO.Path.GetDirectoryName(strConfigLoc).ToString();

System.IO.FileInfo FileInfo = new System.IO.FileInfo(strTemp + @"\" +
Asm.GetName().Name.ToString() +".exe.Config");

System.Xml.XmlDocument XmlDocument = new System.Xml.XmlDocument();

XmlDocument.Load(FileInfo.FullName);


System.Xml.XmlNodeList Nodes =
XmlDocument.DocumentElement.SelectNodes("appSettings/add[@key='"+strKey+"']"
);

if(Nodes.Count>0)

Nodes[0].Attributes.GetNamedItem("value").Value = strValue;

else

{

System.Xml.XmlElement xmlElem=XmlDocument.CreateElement("add");

XmlDocument.DocumentElement.SelectSingleNode("appSettings").AppendChild(xmlE
lem);

System.Xml.XmlAttribute XmlAttrib=XmlDocument.CreateAttribute("key");

XmlAttrib.Value =strKey;

xmlElem.Attributes.Append(XmlAttrib);

XmlAttrib=XmlDocument.CreateAttribute("value");

XmlAttrib.Value =strValue;

xmlElem.Attributes.Append(XmlAttrib);

}

XmlDocument.Save(FileInfo.FullName);

XmlDocument.Save(FileInfo.DirectoryName + @"\..\..\app.config");


}

Cyrus
Tue Sep 09 03:31:10 CDT 2003

thz very much

"epederiva" <epederiva@hotmail.com> wrote in message
news:%23L8NwkqdDHA.1876@TK2MSFTNGP12.phx.gbl...
> This example update app.config file (in the main project) . I think this
it
> will be useful to you:
>
> Common.Utility.UpdateAppConfig("LastChange",DateTime.Now.ToString());
>
> where
>
> public static void UpdateAppConfig(string strKey, string strValue)
>
> {
>
> System.Reflection.Assembly Asm =
> System.Reflection.Assembly.GetExecutingAssembly();
>
> string strConfigLoc=Asm.Location.ToString();
>
>
>
>
>
> string strTemp = System.IO.Path.GetDirectoryName(strConfigLoc).ToString();
>
> System.IO.FileInfo FileInfo = new System.IO.FileInfo(strTemp + @"\" +
> Asm.GetName().Name.ToString() +".exe.Config");
>
> System.Xml.XmlDocument XmlDocument = new System.Xml.XmlDocument();
>
> XmlDocument.Load(FileInfo.FullName);
>
>
> System.Xml.XmlNodeList Nodes =
>
XmlDocument.DocumentElement.SelectNodes("appSettings/add[@key='"+strKey+"']"
> );
>
> if(Nodes.Count>0)
>
> Nodes[0].Attributes.GetNamedItem("value").Value = strValue;
>
> else
>
> {
>
> System.Xml.XmlElement xmlElem=XmlDocument.CreateElement("add");
>
>
XmlDocument.DocumentElement.SelectSingleNode("appSettings").AppendChild(xmlE
> lem);
>
> System.Xml.XmlAttribute XmlAttrib=XmlDocument.CreateAttribute("key");
>
> XmlAttrib.Value =strKey;
>
> xmlElem.Attributes.Append(XmlAttrib);
>
> XmlAttrib=XmlDocument.CreateAttribute("value");
>
> XmlAttrib.Value =strValue;
>
> xmlElem.Attributes.Append(XmlAttrib);
>
> }
>
> XmlDocument.Save(FileInfo.FullName);
>
> XmlDocument.Save(FileInfo.DirectoryName + @"\..\..\app.config");
>
>
> }
>
>
>
>
>
>

Neno
Tue Sep 09 04:16:24 CDT 2003

Hi Cyrus,

please should consider that MS intended the configuration file not to be
changed at runtime.

You can easily write your own settings class and serialize it to XML or
whatever for that purpose.

Writing the app.config is not a good idea (although it works, I know).

Best wishes,

Neno Loje
Microsoft Student Partner
University of Hamburg

Herfried
Tue Sep 09 07:27:01 CDT 2003

Hello,

"Cyrus Chiu" <CyrusChiu@kfsolution.com> schrieb:
> I want to ask how to modify the configuration file
> (windowapplication.exe.config) at runtime and keep
> this setting for the next time the program start?

config files should not be modified by the application, that's why there
are no methods available for modifying them. Nevertheless, you can use
the XML classes provided by the framework to make changes to the config
files.

The config file should not be used to save user preferences. You can
use something like this instead:

http://www.palmbytes.de/content/dotnet/optionslib.htm

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
http://www.mvps.org/dotnet

~cch~
Tue Sep 09 10:16:07 CDT 2003

Thz for ur kindly explaination
i'm fresh to .net so i have much to learn

"Herfried K. Wagner [MVP]" <hirf.nosp@m.activevb.de> ¦b¶l¥ó
news:u6KVt2sdDHA.2672@tk2msftngp13.phx.gbl ¤¤¼¶¼g...
> Hello,
>
> "Cyrus Chiu" <CyrusChiu@kfsolution.com> schrieb:
> > I want to ask how to modify the configuration file
> > (windowapplication.exe.config) at runtime and keep
> > this setting for the next time the program start?
>
> config files should not be modified by the application, that's why there
> are no methods available for modifying them. Nevertheless, you can use
> the XML classes provided by the framework to make changes to the config
> files.
>
> The config file should not be used to save user preferences. You can
> use something like this instead:
>
> http://www.palmbytes.de/content/dotnet/optionslib.htm
>
> --
> Herfried K. Wagner
> MVP ?VB Classic, VB.NET
> http://www.mvps.org/dotnet
>
>