Hi Infragistics,

I'm trying to investigate an infinite loop issue which seems to be happening inside Infragistics XamDataGrid. We have a functionality in our app that let's the user to save and load various customisations he made in his XamDataGrid including FieldLayouts. I can't really tell you what exactly has happened under the cover, but XamDataGrid ended up persisting an inconsistent state of FieldLayouts which looks like this in XML format. Using SaveCustomizastions() method.

<GridLayout name="andor1" type="User">
        <Option>
          <xamDataPresenter version="10.1.20101.2018" formatVersion="1.5">
  <fieldLayouts>
    <fieldLayout key="" fieldList="RowStatus;ResultDataRowStatus, [...]">
      <sortedFields>
        <sortedField direction="Ascending" fieldName="DealStartDate" isGroupBy="false" />
      </sortedFields>

      <fields>        <field name="RowStatus" FixedLocation="FixedToNearEdge" Visibility="Visible" IgnoreFieldVisibilityOverrides="false" row="0" column="36" rowSpan="1" columnSpan="1" isCollapsedInLayout="false" />
[...]
      </fields>
    </fieldLayout>
    <fieldLayout key="" fieldList="">
      <parentFieldLayout key="" fieldList="RowStatus;ResultDataRowStatus, [...]" />
    </fieldLayout>
  </fieldLayouts>

What I really don't like in this is that the 2nd layout refers to a parentLayout which has the same <empty> key and using the same key for different layout really smells like an infitine loop root cause here.

Loading the above XML works fine with LoadCustomisations() method, but various other functionality stops working. For example setting the EditorStyle of a field in code causes the application to hang forever.

Here's the call stack I got from debugger for that call:

 Infragistics3.Wpf.DataPresenter.v10.1.dll!Infragistics.Windows.DataPresenter.GroupByAreaMulti.SynchronizeFieldLayouts(bool calledFromApplyTemplate) + 0x218 bytes
  Infragistics3.Wpf.DataPresenter.v10.1.dll!Infragistics.Windows.DataPresenter.GroupByAreaMulti.OnStyleVersionNumberChanged() + 0x7 bytes
  Infragistics3.Wpf.DataPresenter.v10.1.dll!Infragistics.Windows.DataPresenter.GroupByAreaBase.OnStyleVersionNumberPropertyChanged(System.Windows.DependencyObject target, System.Windows.DependencyPropertyChangedEventArgs e) + 0x20 bytes 
  WindowsBase.dll!System.Windows.DependencyObject.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) + 0x4a bytes
  PresentationFramework.dll!System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) + 0x50 bytes
  Infragistics3.Wpf.DataPresenter.v10.1.dll!Infragistics.Windows.DataPresenter.GroupByAreaBase.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) + 0x27 bytes 
  WindowsBase.dll!System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs args) + 0x2c bytes
  WindowsBase.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex entryIndex, System.Windows.DependencyProperty dp, System.Windows.PropertyMetadata metadata, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, bool coerceWithDeferredReference, System.Windows.OperationType operationType) + 0x515 bytes 
  WindowsBase.dll!System.Windows.DependencyObject.SetValueCommon(System.Windows.DependencyProperty dp, object value, System.Windows.PropertyMetadata metadata, bool coerceWithDeferredReference, System.Windows.OperationType operationType, bool isInternal) + 0x1eb bytes
  WindowsBase.dll!System.Windows.DependencyObject.SetValue(System.Windows.DependencyProperty dp, object value) + 0x2e bytes
  Infragistics3.Wpf.DataPresenter.v10.1.dll!Infragistics.Windows.DataPresenter.GroupByAreaBase.StyleVersionNumber.set(int value) + 0x24 bytes
  Infragistics3.Wpf.DataPresenter.v10.1.dll!Infragistics.Windows.DataPresenter.DataPresenterBase.BumpGroupByAreaStyleVersion() + 0x24 bytes
  Infragistics3.Wpf.DataPresenter.v10.1.dll!Infragistics.Windows.DataPresenter.Field.ProcessFieldSettingsPropertyChanged(System.ComponentModel.PropertyChangedEventArgs e, Infragistics.Windows.DataPresenter.FieldSettings settings, object settingsOwner, bool firstPassForPresenterFlag, bool firstPassForFieldLayoutFlag, Infragistics.Windows.DataPresenter.Field field, Infragistics.Windows.DataPresenter.FieldLayout fieldLayout, Infragistics.Windows.DataPresenter.DataPresenterBase presenter) + 0xc61 bytes
  Infragistics3.Wpf.DataPresenter.v10.1.dll!Infragistics.Windows.DataPresenter.Field.OnSettingsPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e) + 0x55 bytes 
  Infragistics3.Wpf.v10.1.dll!Infragistics.Windows.Helpers.DependencyObjectNotifier.RaisePropertyChangedEvent(string propertyName) + 0x3a bytes
  Infragistics3.Wpf.DataPresenter.v10.1.dll!Infragistics.Windows.DataPresenter.FieldSettings.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) + 0x31 bytes 
  WindowsBase.dll!System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs args) + 0x2c bytes
  WindowsBase.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex entryIndex, System.Windows.DependencyProperty dp, System.Windows.PropertyMetadata metadata, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, bool coerceWithDeferredReference, System.Windows.OperationType operationType) + 0x515 bytes 
  WindowsBase.dll!System.Windows.DependencyObject.SetValueCommon(System.Windows.DependencyProperty dp, object value, System.Windows.PropertyMetadata metadata, bool coerceWithDeferredReference, System.Windows.OperationType operationType, bool isInternal) + 0x1eb bytes
  WindowsBase.dll!System.Windows.DependencyObject.SetValue(System.Windows.DependencyProperty dp, object value) + 0x2e bytes
  Infragistics3.Wpf.DataPresenter.v10.1.dll!Infragistics.Windows.DataPresenter.FieldSettings.EditorStyle.set(System.Windows.Style value) + 0xc bytes 
> >>> Our code <<<

The only workaround I've found so far is keeping only the first layout before persisting the state of the grid.

Regards,

Andor Molnar