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Convert `ArrayList` usage to `List<T>` where possible
See original GitHub issueIs your feature request related to a problem? Please describe
Winforms uses Arraylist extensively.
Describe the solution you’d like and alternatives you’ve considered
Convert Arraylist usage to List<T> to reduce boxing and improve memory utilization.
Will this feature affect UI controls?
N/A
Related: #2644
Remaining occurrences in System.Windows.Forms.Design
| File | Line Count |
|---|---|
| src\System\ComponentModel\Design\ExceptionCollection.cs | 33 |
| src\System\Windows\Forms\Design\ToolStripItemDataObject.cs | 34 |
| src\System\Windows\Forms\Design\ControlDesigner.DesignerControlCollectionCodeDomSerializer.cs | 38 |
| src\System\Windows\Forms\Design\UpDownBaseDesigner.cs | 63 |
| src\System\Windows\Forms\Design\DesignBindingValueUIHandler.cs | 66 |
| src\System\Windows\Forms\Design\ImageListImageEditor.cs | 108 |
| src\System\Windows\Forms\Design\ImageCollectionEditor.cs | 113 |
| src\System\Windows\Forms\Design\GroupBoxDesigner.cs | 124 |
| src\System\Windows\Forms\Design\ComboBoxDesigner.cs | 128 |
| src\System\Windows\Forms\Design\LabelDesigner.cs | 146 |
| src\System\Windows\Forms\Design\TextBoxBaseDesigner.cs | 148 |
| src\System\Windows\Forms\Design\OleDragDropHandler.CfCodeToolboxItem.cs | 162 |
| src\System\Windows\Forms\Design\ButtonBaseDesigner.cs | 218 |
| src\System\Windows\Forms\Design\Behavior\ContainerSelectorBehavior.cs | 230 |
| src\System\Windows\Forms\Design\ToolStripAdornerWindowService.cs | 256 |
| src\System\Windows\Forms\Design\BaseContextMenuStrip.cs | 290 |
| src\System\Windows\Forms\Design\OleDragDropHandler.ComponentDataObject.cs | 302 |
| src\System\ComponentModel\Design\InheritedPropertyDescriptor.cs | 308 |
| src\System\Windows\Forms\Design\Behavior\ToolboxItemSnapLineBehavior.cs | 338 |
| src\System\ComponentModel\Design\CollectionEditor.cs | 347 |
| src\System\Windows\Forms\Design\FormDocumentDesigner.cs | 432 |
| src\System\ComponentModel\Design\SelectionService.cs | 446 |
| src\System\Windows\Forms\Design\Behavior\SelectionManager.cs | 458 |
| src\System\ComponentModel\Design\DesignSurface.cs | 491 |
| src\System\Windows\Forms\Design\DesignerFrame.cs | 576 |
| src\System\Windows\Forms\Design\ToolStripDesignerUtils.cs | 584 |
| src\System\ComponentModel\Design\Serialization\CollectionCodeDomSerializer.cs | 648 |
| src\System\Windows\Forms\Design\DesignerUtils.cs | 816 |
| src\System\Windows\Forms\Design\Behavior\ResizeBehavior.cs | 819 |
| src\System\ComponentModel\Design\Serialization\BasicDesignerLoader.cs | 857 |
| src\System\ComponentModel\Design\Serialization\DesignerSerializationManager.cs | 896 |
| src\System\Windows\Forms\Design\ToolStripItemBehavior.cs | 905 |
| src\System\Windows\Forms\Design\Behavior\DropSourceBehavior.cs | 1029 |
| src\System\Windows\Forms\Design\OleDragDropHandler.cs | 1045 |
| src\System\Windows\Forms\Design\ToolStripItemDesigner.cs | 1177 |
| src\System\ComponentModel\Design\CollectionEditor.CollectionEditorCollectionForm.cs | 1223 |
| src\System\ComponentModel\Design\Serialization\CodeDomComponentSerializationService.cs | 1471 |
| src\System\ComponentModel\Design\DesignerHost.cs | 1615 |
| src\System\Windows\Forms\Design\ToolStripKeyboardHandlingService.cs | 1891 |
| src\System\Windows\Forms\Design\ControlDesigner.cs | 2205 |
| src\System\Windows\Forms\Design\ToolStripDesigner.cs | 2260 |
| src\System\Windows\Forms\Design\ParentControlDesigner.cs | 2378 |
| src\System\Windows\Forms\Design\ToolStripMenuItemDesigner.cs | 2527 |
| src\System\ComponentModel\Design\Serialization\CodeDomSerializerBase.cs | 3020 |
Issue Analytics
- State:
- Created 10 months ago
- Reactions:4
- Comments:17 (17 by maintainers)
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Here’s the list of classes that will benefit from replacing
ArrayListwithList<T>(I’ll continuously maintain this list as I discover more classes):List<WeakRefObject?>instead ofArrayListList<IArrangedElement>instead ofArrayListList<TableLayoutStyle>instead ofArrayListList<IDesignerHost>instead ofArrayListList<IExtenderProvider>instead of ArrayListList<DesignerVerb>instead ofArrayListArrayList. Two of them can be replaced withList<IComponent>and the other one can be replaced withList<ReferenceHolder>ArrayList. One can be replaced withList<string>and the other one can be replaced withList<CodeExpression>List<IComponent>, and the remaining three can be replaced withList<UndoEvent>,List<ChangeUndoEvent>andList<AddRemoveUndoEvent>respectively.ArrayListwithList<Behavior>ArrayListin this class. Four of them can be replaced withList<SnapLine>, one can be replaced withList<SnapLineType>and two can be replaced withList<Line>ArrayListwithList<IComponent>ArrayListwithList<BufferedKey>ArrayListthat can be replaced withList<MenuCommand>ArrayListwithList<DataGridViewRow>ArrayListwithList<DataGridViewCell>ArrayListwithList<DataGridViewColumn>ArrayListwithList<DataGridViewCell>ArrayListwithList<DataGridViewColumn>ArrayListwithList<DataGridViewRow>ArrayListwithList<GridEntryCollection>ArrayListwithList<Binding>List<Attribute>Here are classes that use an
ArrayListand the type of the elements isobject. Is it worth it to convert toList<object>?objectsbut I suspect the intent is to keep a reference of visual components rather than objects. Therefore, I thinkList<IComponent>would be more appropriateI would be happy to contribute. I will start with combing through the code base to identify the various classes that would be affected.