Hi,

Has anyone found a solution to this problem? 

 We are experiencing exactly the same thing. In C# only an indexer can take a parameter so you have to be able to specify a parameter without a property as this post describes, i.e. FieldName="[0]".

 Cheers,

Dave

Hi Alex,

Thanks for the suggestion.  We have worked around this problem in a similar way by implementing model wrappers around our data classes in the UI  (for more reasons than just solving this problem).  It's good to know there's a c# only solution though.

Dave

Hello,

I am following up on this post to provide additional details.  Internally an EnumerableObjectWrapper gets used to wrap lists of lists when the XamDataGrid is bound to them and this is why the BindingPath of "[0]" will fail.  The EnumerableObjectWrapper does expose an Items collection that you can use in the BindingPath: "Items[0]"

Here is a code snippet that demonstrates this:

XamDataGrid xamDataGrid1 = new XamDataGrid();
this.Content = xamDataGrid1;
xamDataGrid1.FieldLayoutSettings.AutoGenerateFields = false;
 
ObservableCollection<string> headers = new ObservableCollection<string> { "FirstName", "LastName", "Age" };
           
ObservableCollection<string> row1 = new ObservableCollection<string> { "John", "Doe", "19" };
ObservableCollection<string> row2 = new ObservableCollection<string> { "Jane", "Doe", "21" };
ObservableCollection<string> row3 = new ObservableCollection<string> { "Suzie", "Q", "52" };
ObservableCollection<string> row4 = new ObservableCollection<string> { "No", "Body", "48" };
 
ObservableCollection<ObservableCollection<string>> tableValues = new ObservableCollection<ObservableCollection<string>> { row1, row2, row3, row4 };
 
FieldLayout fldLayout =  new FieldLayout();
 
 
    for (int i = 0; i < headers.Count;  i++)
    {
        string s = headers[i];
        UnboundField uf = new UnboundField();
        uf.Name = s;
        uf.Label = s;
        uf.BindingPath = new PropertyPath("Items[" + i.ToString() + "]",null);
        fldLayout.Fields.Add(uf);
 
    }
 
 
 
xamDataGrid1.FieldLayouts.Add(fldLayout);
xamDataGrid1.DataSource = tableValues;

Hi Alan,

Is there any MVVM solution for the above where we can change the FieldLayout in the ViewModel?

Regards,

Prasanna

Prasanna,

It isn't possible to have a binding on the FieldLayout because it isn't actually part of the visual or logical trees.  Assuming that the number of fields will still change dynamically you would be best off creating a UserControl that contains the XamDataGrid that exposes a property that you can set for the DataSource and Headers and then when those properties change update your FieldLayout accordingly.  While this would require writing code in the UserControl, when you consume the UserControl you could still use MVVM.

Let me know if you have any questions with this matter.

Can you give me a sample with this approach.

If not can you look at my requirement below and suggest some MVVM approach. There are two types of fields a user can select namely "Periods" and "Abbrev". Upon selecting the two sets of fields, it results in a Flat Grid (see Figure 1 below). I need to convert this flat grid into another grid as shown in Figure 2 below.

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Prasanna,

The example that I provided earlier in this thread is the only existing example that I have.  You would have to modify this so that the header and row collections could be exposed as properties on a user control and then when the properties are set update the XamDataGrid appropriately.

Even if this is only going to be used in one place in your application it would still make sense to use the XamPivotGrid since the control already provides the functionality that you are looking for.

Let me know if you have any questions with this matter.

Hi Alan,

Thanks for your reply.

But this is a one-off requirement so I am looking for a XamDataGrid solution.
Can you please elaborate on how to  expose a property for the Headers and then update FieldLayout accordingly. If you have a sample or already posted solution  please let me know.

Regards,
Prasanna