--- title: "Class ItemHandlersCollection | Customer's Canvas On-Premises" canonical: "https://customerscanvas.com/docs/on-premises/design-atoms-cs/reference/api/Aurigma.DesignAtoms.Canvas.ItemHandlers/ItemHandlersCollection/" --- # Class ItemHandlersCollection > **Inheritance:** `System.Object` -> `System.Collections.ObjectModel.Collection` -> `Aurigma.DesignAtoms.Canvas.Collection.Collection` -> `Aurigma.DesignAtoms.Canvas.Collection.SelectableCollection` -> ItemHandlersCollection ###### **Namespace**: [Aurigma.DesignAtoms.Canvas.ItemHandlers](https://customerscanvas.com/docs/on-premises/design-atoms-cs/reference/api/Aurigma.DesignAtoms.Canvas.ItemHandlers.md) ###### **Assembly**: Aurigma.DesignAtoms.dll ```csharp title="Syntax" public class ItemHandlersCollection : SelectableCollection, IList, ICollection, IList, ICollection, IReadOnlyList, IReadOnlyCollection, IEnumerable, IEnumerable ``` ## Implements * `System.Collections.Generic.IList` * `System.Collections.Generic.ICollection` * `System.Collections.IList` * `System.Collections.ICollection` * `System.Collections.Generic.IReadOnlyList` * `System.Collections.Generic.IReadOnlyCollection` * `System.Collections.Generic.IEnumerable` * `System.Collections.IEnumerable` ## Inherited Members * `Aurigma.DesignAtoms.Canvas.Collection.SelectableCollection.OnSelectedIndexChanged(System.Int32,System.Int32)` * `Aurigma.DesignAtoms.Canvas.Collection.SelectableCollection.Move(System.Int32,System.Int32)` * `Aurigma.DesignAtoms.Canvas.Collection.SelectableCollection.RemoveItem(System.Int32)` * `Aurigma.DesignAtoms.Canvas.Collection.SelectableCollection.SelectedItem` * `Aurigma.DesignAtoms.Canvas.Collection.SelectableCollection.SelectedIndex` * `Aurigma.DesignAtoms.Canvas.Collection.SelectableCollection.SelectedIndexChanged` * `Aurigma.DesignAtoms.Canvas.Collection.Collection.AddRange(System.Collections.Generic.IEnumerable)` * `Aurigma.DesignAtoms.Canvas.Collection.Collection.OnCollectionCleared(Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler[])` * `Aurigma.DesignAtoms.Canvas.Collection.Collection.SetItem(System.Int32,Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler)` * `Aurigma.DesignAtoms.Canvas.Collection.Collection.OnItemMoved(System.Int32,System.Int32,Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler)` * `Aurigma.DesignAtoms.Canvas.Collection.Collection.Item(System.Int32)` * `Aurigma.DesignAtoms.Canvas.Collection.Collection.ItemAdded` * `Aurigma.DesignAtoms.Canvas.Collection.Collection.ItemRemoved` * `Aurigma.DesignAtoms.Canvas.Collection.Collection.ItemMoved` * `Aurigma.DesignAtoms.Canvas.Collection.Collection.CollectionCleared` * `System.Collections.ObjectModel.Collection.Add(Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler)` * `System.Collections.ObjectModel.Collection.Clear` * `System.Collections.ObjectModel.Collection.CopyTo(Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler[],System.Int32)` * `System.Collections.ObjectModel.Collection.Contains(Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler)` * `System.Collections.ObjectModel.Collection.GetEnumerator` * `System.Collections.ObjectModel.Collection.IndexOf(Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler)` * `System.Collections.ObjectModel.Collection.Insert(System.Int32,Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler)` * `System.Collections.ObjectModel.Collection.Remove(Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler)` * `System.Collections.ObjectModel.Collection.RemoveAt(System.Int32)` * `System.Collections.ObjectModel.Collection.System#Collections#IEnumerable#GetEnumerator` * `System.Collections.ObjectModel.Collection.System#Collections#ICollection#CopyTo(System.Array,System.Int32)` * `System.Collections.ObjectModel.Collection.System#Collections#IList#get_Item(System.Int32)` * `System.Collections.ObjectModel.Collection.System#Collections#IList#set_Item(System.Int32,System.Object)` * `System.Collections.ObjectModel.Collection.System#Collections#IList#Add(System.Object)` * `System.Collections.ObjectModel.Collection.System#Collections#IList#Contains(System.Object)` * `System.Collections.ObjectModel.Collection.System#Collections#IList#IndexOf(System.Object)` * `System.Collections.ObjectModel.Collection.System#Collections#IList#Insert(System.Int32,System.Object)` * `System.Collections.ObjectModel.Collection.System#Collections#IList#Remove(System.Object)` * `System.Collections.ObjectModel.Collection.Count` * `System.Collections.ObjectModel.Collection.Items` * `System.Collections.ObjectModel.Collection.System#Collections#Generic#ICollection#IsReadOnly` * `System.Collections.ObjectModel.Collection.System#Collections#ICollection#IsSynchronized` * `System.Collections.ObjectModel.Collection.System#Collections#ICollection#SyncRoot` * `System.Collections.ObjectModel.Collection.System#Collections#IList#Item(System.Int32)` * `System.Collections.ObjectModel.Collection.System#Collections#IList#IsReadOnly` * `System.Collections.ObjectModel.Collection.System#Collections#IList#IsFixedSize` * `System.Object.ToString` * `System.Object.Equals(System.Object)` * `System.Object.Equals(System.Object,System.Object)` * `System.Object.ReferenceEquals(System.Object,System.Object)` * `System.Object.GetHashCode` * `System.Object.GetType` * `System.Object.MemberwiseClone` ## Properties ### Layer ```csharp public Layer Layer { get; } ``` ## Methods ### GetItemHandlersByName ```csharp public ItemHandler[] GetItemHandlersByName(string name) ``` ##### Parameters | Type | Name | Description | |:---|:---|:---| | `System.String` | *name* | | ##### Returns `Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler[]` ### ClearItems ```csharp protected override void ClearItems() ``` ##### Overrides * `Aurigma.DesignAtoms.Canvas.Collection.SelectableCollection.ClearItems` ### InsertItem ```csharp protected override void InsertItem(int index, ItemHandler item) ``` ##### Parameters | Type | Name | Description | |:---|:---|:---| | `System.Int32` | *index* | | | [Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler](https://customerscanvas.com/docs/on-premises/design-atoms-cs/reference/api/Aurigma.DesignAtoms.Canvas.ItemHandlers/ItemHandler.md) | *item* | | ##### Overrides * `Aurigma.DesignAtoms.Canvas.Collection.SelectableCollection.InsertItem(System.Int32,Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler)` ### OnItemAdded ```csharp protected override void OnItemAdded(int index, ItemHandler item) ``` ##### Parameters | Type | Name | Description | |:---|:---|:---| | `System.Int32` | *index* | | | [Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler](https://customerscanvas.com/docs/on-premises/design-atoms-cs/reference/api/Aurigma.DesignAtoms.Canvas.ItemHandlers/ItemHandler.md) | *item* | | ##### Overrides * `Aurigma.DesignAtoms.Canvas.Collection.Collection.OnItemAdded(System.Int32,Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler)` ### OnItemRemoved ```csharp protected override void OnItemRemoved(int index, ItemHandler item) ``` ##### Parameters | Type | Name | Description | |:---|:---|:---| | `System.Int32` | *index* | | | [Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler](https://customerscanvas.com/docs/on-premises/design-atoms-cs/reference/api/Aurigma.DesignAtoms.Canvas.ItemHandlers/ItemHandler.md) | *item* | | ##### Overrides * `Aurigma.DesignAtoms.Canvas.Collection.Collection.OnItemRemoved(System.Int32,Aurigma.DesignAtoms.Canvas.ItemHandlers.ItemHandler)`