Yes... but that would be the easy way out and we wouldnt be programming Micrrosoft products if we settled for that... ;) 

no, actually, I have about a dozen types of logs that contain the same core data, but each log has different sets of property data that would be within the collection.  I would like to avoid defining on specific class for each of the log types.  What I would like to do is have a generic class that contains the core data and then a collection of log entry proprties for the variable stuff.  The collection would contain the property name, ID and value.  When I get my log back I want to create the columns for that log type dynamically, then as I'm populating my rows, assign them to the specific properties within the sub collection.

Hi Marc, 

Then i'd recommend using a Custom Column. 

Here is some code to get you started:

Step 1:  Create a Custom Column and ColumnContentProvider:

public class MyColumn : TemplateColumn

      {

            protected override ColumnContentProviderBase GenerateContentProvider()

            {

                  return new MyColumnContentProvider();

            }

      }

      public class MyColumnContentProvider : TemplateColumnContentProvider

      {

            public override FrameworkElement ResolveDisplayElement(Cell cell, Binding cellBinding)

            {

                  FrameworkElement elem = base.ResolveDisplayElement(cell, cellBinding);

                  if (elem != null)

                  {

                        MyDataObject mdo = cell.Row.Data as MyDataObject;

                        if(mdo != null)

                        {

                              elem.DataContext = mdo.Properties[cell.Column.Key];

                        }

                  }

                  return elem;

            }

      }

Step 2:  Create a generic DataTemplate:

<DataTemplate x:Key="colTemplate">

<TextBlock Text="{Binding}"></TextBlock>

</DataTemplate>

Step 3:  Generate your Columns:

DataTemplate template = this.Resources["colTemplate"] as DataTemplate;

this.DataGrid1.Columns.Add(new MyColumn() { ItemTemplate = template, Key = "Prop1" });

this.DataGrid1.Columns.Add(new MyColumn() { ItemTemplate = template, Key = "Prop2" });

this.DataGrid1.Columns.Add(new MyColumn() { ItemTemplate = template, Key = "Prop3" });

What i'm doing:

Basically, i create a custom column, with a  custom content provider, that changes the DataContext of the binding of the my DataTemplate.  The data i'm creating is a Dictionary, which i'm assuming you're using as well. 

My DataTemplate, just creates a straight binding, with no property path, b/c the datacontext i'm binding to is the value that i want to display. 

Then i just walk through and generate my columns.  Note, i'm using my column key to determine the properties from the Dictionary. But since this is your custom column, you can add additional properties and customize it to your wishes. 

Hope this helps, 

-SteveZ

I had the same problem, and this approach seamed to work great.  one issue is now if i drag a column into the group by area ir gives the follow error:

Unhandled Error in Silverlight Application Object reference not set to an instance of an object. at Infragistics.Silverlight.DataManagerBase.ResolvePropertyTypeFromPropertyName(String propertyName, Type rootType)\n at Infragistics.Silverlight.GroupByContext.CreateGenericCustomGroup(Type type, String propertyName, Object comparer)\n at Infragistics.Silverlight.RowsManager.InvalidateGroupBy(Boolean reset)\n at Infragistics.Silverlight.XamWebGridRowsManager.InvalidateGroupBy(Boolean reset)\n at Infragistics.Silverlight.RowsManager.OnColumnLayoutPropertyChanged(ColumnLayout layout, String propertyName)\n at Infragistics.Silverlight.XamWebGridRowsManager.OnColumnLayoutPropertyChanged(ColumnLayout layout, String propertyName)\n at Infragistics.Silverlight.RowsManagerBase.a(Object A_0, PropertyChangedEventArgs A_1)\n at System.ComponentModel.PropertyChangedEventHandler.Invoke(Object sender, PropertyChangedEventArgs e)\n at Infragistics.Silverlight.DependencyObjectNotifier.OnPropertyChanged(String name)\n at Infragistics.Silverlight.Controls.ColumnLayout.InvalidateGroupBy()\n at Infragistics.Silverlight.Controls.GroupByColumnsCollection.OnGroupingChanged(IList`1 oldCollection, IList`1 newCollection)\n at Infragistics.Silverlight.Controls.GroupByColumnsCollection.AddItem(Int32 index, Column item)\n at Infragistics.Silverlight.CollectionBase`1.Add(T item)\n at Infragistics.Silverlight.Controls.Column.set_IsGroupBy(Boolean value)\n at Infragistics.Silverlight.Controls.Primitives.HeaderCellControl.OnMouseLeftButtonUpColumnMoving(MouseButtonEventArgs e)\n at Infragistics.Silverlight.Controls.Primitives.CellControlBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)\n at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e)\n at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName)

any ideas?

IG

any idea whats wrong with my sample or why that Silverlight is throwing that exception that i posted at the top of page 3, (when you click on one of the cells)????

yeah at the moment i am using this and it seems to work 

Private Function CreateXamTemplateColumn(ByVal i As Integer, _
                                             ByVal propName As String) As ColumnBase

        Dim column As New TemplateColumn()

        column.Key = propName & i

        column.HeaderText = String.Format("Period#{0}.{1}", i, propName)

        column.ItemTemplate = XamlReader.Load(CreateColumnTemplate(i, propName))

        column.EditorTemplate = XamlReader.Load(CreateColumnEditTemplate(i, propName))
        ' //edit template  
        Return column
    End Function

Also, generate a unique key for each colum:

Private Function CreateXamTemplateColumn(ByVal i As Integer, _
                                             ByVal propName As String) As ColumnBase

        Dim column As New TemplateColumn()

        column.Key = propName  //*******  Generate Unqiue key **************// string.format("Column{0}", i); or something like that.  Maybe use a random number or somehting, just make it unique.

        column.HeaderText = String.Format("Period#{0}.{1}", i, propName)

        column.ItemTemplate = XamlReader.Load(CreateColumnTemplate(i, propName))

        column.EditorTemplate = XamlReader.Load(CreateColumnEditTemplate(i, propName))
        ' //edit template  
        Return column
    End Function

make sure you are not concatenating anything to the propName parameter.  Actually just remove it all together, and replace the {1} in the string.format method with the Hours property.  Do this with both the item template and edit template methods.

Private Function CreateColumnEditTemplate(ByVal index As Integer) As String

        Dim CellTemp As New StringBuilder()
        CellTemp.Append("<DataTemplate ")
        CellTemp.Append("xmlns='http://schemas.microsoft.com/winfx/")
        CellTemp.Append("2006/xaml/presentation' ")
        CellTemp.Append("xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>")
        CellTemp.Append([String].Format("<TextBox Text='{{Binding Periods[{0}].Hours, Mode=TwoWay}}' TextAlignment='Right'/>", _
                                        index, propertyName))
        CellTemp.Append("</DataTemplate>")

        Return CellTemp.ToString()
    End Function

so i guess based on what you were said earlier about them throwing an error, was it possibly the dup key i error. 

i added the index to "hours" to change the key so i would not throw that exception

i changed it back to test, and just exited the loop after one and it seems to work. 

anythoughts on how to get around this

ALSO, thanks for all the help!