Multiple ViewModel problem

Question

4.00/5 (1 vote)

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I would like to bind a ViewModell with an xml to my view, like this one:

C#

class ViewModel : INotifyPropertyChanged
       {
           public XmlDataProvider Dataprov { get; set; }


           private string _CommonProperty;

           public string CommonProperty
           {
               get { return _CommonProperty; }
               set { _CommonProperty = value; OnPropertyChanged(); }
           }

           ...
       }

I added the viewmodel to datacontext in this way:

C#

public MainWindow()
        {
            InitializeComponent();
            vm = new ViewModel();
            vm.Dataprov = new XmlDataProvider();
            try
            {
                vm.Dataprov.Source = new Uri("Test.xml",UriKind.Relative);
            }
            catch (Exception ex)
            {}
            this.DataContext = vm;
        }

Then I tried multiple ways to get xml data in my view, but every tries failed :(

for example:

XML

 <Grid>
        
        <StackPanel Orientation="Vertical">
            <Label Content="{Binding  Source=Dataprov, XPath='Root/test1/test11'}" ></Label>
        </StackPanel>
</Grid>

Is there any possible way to use xml binding, if the XmlDataProvider is part of the ViewModel?

Thank you

Posted 11-Jan-13 2:47am

CzimerA

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Comments

Suvabrata Roy 11-Jan-13 8:55am

Are you sure about your xml file format ?
If so then share the xml.

Other wise its very tough to understand.

CzimerA 11-Jan-13 9:30am

Im sure, If the datacontext is the XMLDataProvider the binding works.

2 solutions

Solution 1

Hi,

For your reference :
Link[^]

Posted 11-Jan-13 2:56am

Suvabrata Roy

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CzimerA · Accepted Answer · 2013-01-14T02:04:00

I have found a walkaround solution for this issue. The XmlDataProvider was removed from the viewmodel,and was given to the resources:

XML

<window.resources>
   <XmlDataProvider x:Key="Lang" Source="Test.xml" XPath="Root/test1"  />
</window.resources>

Lets say the viewmodel like this:

C#

class ViewModel : INotifyPropertyChanged 
{
  private bool _PropEnabled;

  public bool PropEnabled
  {
    get { return _PropEnabled; }
    set { _PropEnabled = value; OnPropertyChanged(); }
    ...
  }
}

Now the binding could be accomplished:

XML

<Label Content="{Binding Source={StaticResource ResourceKey=Lang}, XPath='test11'}" IsEnabled="{Binding PropEnabled}" ></Label>

So the XML and the view can be use for binding in the same time. The Content is binded to the XML, but the IsEnabled property is binded to the viewmodel.
I have to highlight this is only a workaround for my problem, but how to merge multiple viewmodels is still unclean for me.