Exception: 解析表达式出错。
内部错误：给定关键字不在字典中。
原始表达式：
	string indexName = {索引};
	
	if(!string.IsNullOrWhiteSpace(indexName)){
		Dictionary<string,object> dict =  (Dictionary<string,object>){indexDict};
		Dictionary<string,object> subDict = (Dictionary<string,object>)dict[indexName];
		MessageBox.show(subDict.ToJson());
		//return subDict["fieldsList"];
	}
	
	

StackTrace:
   在 Quicker.Domain.Actions.X.XActionHelper.GetValueFromExpression2(String expression, ActionExecuteContext context)
   在 Quicker.Domain.Actions.X.XActionHelper.InterpolateOrEvalToString(ActionExecuteContext context, String data)
   在 Quicker.View.Forms.Controls.FormEditWithAutoCompleteDropdownControl.Update(IVariableContext context)
   在 Quicker.View.Forms.Controls.FormFieldWrapper.Update(IVariableContext context)
   在 Quicker.View.Forms.FormWindow.I3St6sdkPlX(String  )
   在 Quicker.View.Forms.FormWindow.fOUt6ExV88H(Object  , FormField  )
   在 Quicker.View.Forms.Controls.BaseFormFieldControl.TriggerValueChange(FormField field)
   在 Quicker.View.Forms.Controls.FormFieldWrapper.KOFtpBhkyqS(Object  , FormField  )
   在 Quicker.View.Forms.Controls.BaseFormFieldControl.TriggerValueChange(FormField field)
   在 Quicker.View.Forms.Controls.FormEditWithAutoCompleteDropdownControl.YWjtZIc1WEq(Object  , TextChangedEventArgs  )
   在 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   在 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   在 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   在 System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   在 System.Windows.Controls.Primitives.TextBoxBase.OnTextContainerChanged(Object sender, TextContainerChangedEventArgs e)
   在 System.Windows.Controls.TextBox.OnTextContainerChanged(Object sender, TextContainerChangedEventArgs e)
   在 System.Windows.Documents.TextContainerChangedEventHandler.Invoke(Object sender, TextContainerChangedEventArgs e)
   在 System.Windows.Documents.TextContainer.EndChange(Boolean skipEvents)
   在 System.Windows.Documents.TextRangeBase.EndChange(ITextRange thisRange, Boolean disableScroll, Boolean skipEvents)
   在 System.Windows.Documents.TextRange.ChangeBlock.System.IDisposable.Dispose()
   在 System.Windows.Controls.TextBox.OnTextPropertyChanged(String oldText, String newText)
   在 System.Windows.Controls.TextBox.OnTextPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   在 System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   在 System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   在 System.Windows.Controls.TextBox.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   在 System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   在 System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   在 System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   在 System.Windows.Controls.ComboBox.UpdateEditableTextBox()
   在 System.Windows.Controls.ComboBox.SelectedItemUpdated()
   在 System.Windows.Controls.ComboBox.OnSelectionChanged(SelectionChangedEventArgs e)
   在 System.Windows.Controls.Primitives.Selector.SelectionChanger.End()
   在 System.Windows.Controls.Primitives.Selector.SelectionChanger.SelectJustThisItem(ItemInfo info, Boolean assumeInItemsCollection)
   在 System.Windows.Controls.ComboBox.NotifyComboBoxItemMouseUp(ComboBoxItem comboBoxItem)
   在 System.Windows.Controls.ComboBoxItem.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   在 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   在 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   在 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   在 System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   在 System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   在 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   在 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   在 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   在 System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   在 System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   在 System.Windows.Input.InputManager.ProcessStagingArea()
   在 System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   在 System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   在 System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   在 System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   在 System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   在 MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   在 MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   在 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)