Saving User Config data to XML and Relative URI error

Question

Good evening,

I am working on a program where some application config info is stored in a Userconfig.xml file. I am loading the file as an XMLDataProvider in the XAML via relative URI:

<XmlDataProvider x:Name="UserConfigDataSource" x:Key="UserConfigDataSource" Source="UserConfig.xml" d:IsDataSource="True"/>

I have a number of items throughout bound to elements in the document and an event handler that saves to the XMLDataProvider:

Private Sub SaveConfig(ByVal sender as Object, ByVal e as System.EventArgs)
    'TODO: Add event handler implementation here

    Dim SavePath As String = UserConfigDataSource.Source.LocalPath.ToString
    Dim XMLDoc = UserConfigDataSource.Document
    UserConfigDataSource.Document.Save(SavePath)
End Sub

When this executes I get the error "This operation is not supported for a relative URI". Is there a good way to produce an absolute URI (aside from getting the assembly executing location and trimming the executable filename from the end)? I expected this to be a somewhat simple procedure. Any help would be greatly appreciated.

Cory

Answer 1

Have you looked at the exact value of SavePath in the debugger ? As it was a URI in XAML, it may have a syntax not understood by XmlDocument.Save. You could also try AbsoluteUri.ToString

Answer 2

Used the suggestion HERE

FileInfo file = new FileInfo("configuration.xml"); provider.Source = new System.Uri(file.FullName);

All worked well.

Cory