Persistent settings

[John]

Hi



I need to store the path to db in my app. I have used app setting for this.
Unfortunately various clients have different db paths and I have set them up
once on each client location. The problem is that when I send them updates
and they uninstall the old version and reinstall the new version the setting
is reset to my settings. This is because the old configuration file is
deleted and replaced by the new one included in the app. Is there a way to
have a setting that is not overwritten by an application reinstall?



Thanks



Regards

[rowe_newsgroups]

Re: Persistent settings

On Apr 28, 9:12 am, "John" <J...@nospam.in fovis.co.ukwrot e:

Hi
>
I need to store the path to db in my app. I have used app setting for this.
Unfortunately various clients have different db paths and I have set them up
once on each client location. The problem is that when I send them updates
and they uninstall the old version and reinstall the new version the setting
is reset to my settings. This is because the old configuration file is
deleted and replaced by the new one included in the app. Is there a way to
have a setting that is not overwritten by an application reinstall?
>
Thanks
>
Regards

I have always used a separate file for things like this - perhaps you
could use an Xml file that is stored in the application's base
directory. If you are worried about the sensitive nature of connection
strings, you could even have your app encrypt/decrypt that file.

Thanks,

Seth Rowe

[John]

Re: Persistent settings

Many thanks for that. Would be grateful for a link on how to handle xml
files.

Thanks

Regards


"rowe_newsgroup s" <rowe_email@yah oo.comwrote in message
news:1177766237 .545191.223640@ e65g2000hsc.goo glegroups.com.. .

On Apr 28, 9:12 am, "John" <J...@nospam.in fovis.co.ukwrot e:

>Hi
>>
>I need to store the path to db in my app. I have used app setting for
>this.
>Unfortunatel y various clients have different db paths and I have set them
>up
>once on each client location. The problem is that when I send them
>updates
>and they uninstall the old version and reinstall the new version the
>setting
>is reset to my settings. This is because the old configuration file is
>deleted and replaced by the new one included in the app. Is there a way
>to
>have a setting that is not overwritten by an application reinstall?
>>
>Thanks
>>
>Regards

>
I have always used a separate file for things like this - perhaps you
could use an Xml file that is stored in the application's base
directory. If you are worried about the sensitive nature of connection
strings, you could even have your app encrypt/decrypt that file.
>
Thanks,
>
Seth Rowe
>

[Herfried K. Wagner [MVP]]

Re: Persistent settings

"John" <John@nospam.in fovis.co.ukschr ieb:

I need to store the path to db in my app. I have used app setting for
this. Unfortunately various clients have different db paths and I have set
them up once on each client location. The problem is that when I send them
updates and they uninstall the old version and reinstall the new version
the setting is reset to my settings. This is because the old configuration
file is deleted and replaced by the new one included in the app. Is there
a way to have a setting that is not overwritten by an application
reinstall?

Take a look at 'My.Settings' and the "Settings" tab in "My Project" if you
are using VS 2005.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[rowe_newsgroups]

Re: Persistent settings

On Apr 28, 12:25 pm, "John" <J...@nospam.in fovis.co.ukwrot e:

Many thanks for that. Would be grateful for a link on how to handle xml
files.
>
Thanks
>
Regards
>
"rowe_newsgroup s" <rowe_em...@yah oo.comwrote in message
>
news:1177766237 .545191.223640@ e65g2000hsc.goo glegroups.com.. .
>

On Apr 28, 9:12 am, "John" <J...@nospam.in fovis.co.ukwrot e:

Hi

>

I need to store the path to db in my app. I have used app setting for
this.
Unfortunately various clients have different db paths and I have set them
up
once on each client location. The problem is that when I send them
updates
and they uninstall the old version and reinstall the new version the
setting
is reset to my settings. This is because the old configuration file is
deleted and replaced by the new one included in the app. Is there a way
to
have a setting that is not overwritten by an application reinstall?

>

Thanks

>

Regards

>

I have always used a separate file for things like this - perhaps you
could use an Xml file that is stored in the application's base
directory. If you are worried about the sensitive nature of connection
strings, you could even have your app encrypt/decrypt that file.

>

Thanks,

>

Seth Rowe

Here's a quick console application that briefly demonstrates how to
use an Xml file:

Imports System.Xml

Module Module1

Sub Main()
Console.WriteLi ne("Saving Settings...")
SaveSettings()
System.Threadin g.Thread.Sleep( 500)
Console.WriteLi ne(GetSetting(" ConnectionStrin g"))
Console.Read()
Dim fileName As String = String.Format(" C:\Document and
Settings\{0}\De sktop\MyXmlFile .Xml", Environment.Use rName)
If System.IO.File. Exists(fileName ) Then
System.IO.File. Delete(fileName )
End If
End Sub

Public Sub SaveSettings()
Dim writer As XmlWriter = XmlWriter.Creat e(String.Format ("C:
\Documents and Settings\{0}\De sktop\MyXmlFile .Xml",
Environment.Use rName))
writer.WriteSta rtElement("Sett ings")
writer.WriteSta rtElement("Conn ectionString")
writer.WriteStr ing("YourConnSt ring")
writer.WriteEnd Element() ' ConnectionStrin g
writer.WriteEnd Element() ' Settings
writer.Close()
End Sub

Public Function GetSetting(ByVa l nodeName As String) As String
Dim doc As New XmlDocument
doc.Load(String .Format("C:\Doc uments and Settings\{0}\De sktop
\MyXmlFile.Xml" , Environment.Use rName))
Dim node As XmlNode = doc.GetElements ByTagName(nodeN ame)(0)
Return node.InnerText
End Function

End Module

Thanks,

Seth Rowe