application config

[Lisana]

I have two application. In the first one, I want to store values to the app.config file from my app textbox, how do I do in the app.config? what should do in the value = "" ? for example: if the textbox1.text = "MyServerName", when the button click, then send the value auto sign to app.config value="MyServerName"... After I install this app. in the target machine, install my second app. I need to read the three value from the app.config. Do I need to create another app.config for the second app or I can read from the same app.config? If I do can read from the same app.config, how should I code it in my second app? Thanks All Your Help! Lisa

[Colin Angus Mackay]

You cannot do this directly. The App.Config file is intended to be read only. i.e. the settings exist already. You will have to read the file in as an XML file, make the modifications and write it out again. There are numerous ways to do this.

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[Lisana]

how can I read tha app.config from other app. created? it created a menu.exe.config..how can I read it from another application? Lisa

[Len Miller]

You cannot write a config file during runtim. You will want to serialize an object with your data to an XML file. You can do it like this: 1) Lets say you have an object called CustomSettings that has a bunch of properties that you want to save 2) You can set the appSettingsFullpath to something like: appSettingsFullPath = String.Concat( _ Application.StartupPath, "\custom.settings.xml") 3) Then you can write your CustomSettings object out like this: Dim writer As StreamWriter ' Write (serialize) XML app settings data ' Folder: Try writer = New StreamWriter(appSettingsFullPath) Dim serializer As New XmlSerializer(GetType(CustomSettings)) serializer.Serialize(writer, Me.AppCustomSettings) Catch ex As Exception MessageBox.Show( _ String.Format("Cannot serialize XML settings object.{0}{0}{1}{0}{0}{2}" _ , Microsoft.VisualBasic.ControlChars.CrLf _ , ex.Message, ex.StackTrace) _ ) Finally writer.Close() End Try 4) You can de-serialize (read it) back into your object like this: ' Get (deserialize) XML app settings data ' Folder: Try Dim fileObj As File If Not fileObj.Exists(appSettingsFullPath) Then '** Decide what you need to do here End If fs = New FileStream(appSettingsFullPath, FileMode.Open) Dim csSerializer As New XmlSerializer(GetType(CustomSettings)) '** you can add two event handlers below if you wish ' AddHandler csSerializer.UnknownNode, AddressOf csSerializer_UnknownNode ' AddHandler csSerializer.UnknownAttribute, AddressOf csSerializer_UnknownAttribute Dim cs As SMS.CustomSettings Me.AppCustomSettings = CType(csSerializer.Deserialize(fs), CustomSettings) Catch ex As Exception MessageBox.Show( _ String.Format("Cannot de-serialize XML settings object.{0}{0}{1}{0}{0}{2}" _ , Microsoft.VisualBasic.ControlChars.CrLf _ , ex.Message, ex.StackTrace) _ ) Finally fs.Close() End Try I hope this helps! Thanks, -Len Miller "If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -Abraham Lincoln