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ListBox.SelectedObjectCollection Class

Represents the collection of selected items in the ListBox.

System.Object
  System.Windows.Forms.ListBox.SelectedObjectCollection

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public class SelectedObjectCollection : IList, 
	ICollection, IEnumerable

The ListBox.SelectedObjectCollection type exposes the following members.

  NameDescription
Public methodListBox.SelectedObjectCollectionInitializes a new instance of the ListBox.SelectedObjectCollection class.
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  NameDescription
Public propertyCountGets the number of items in the collection.
Public propertyIsReadOnlyGets a value indicating whether the collection is read-only.
Public propertyItemGets the item at the specified index within the collection.
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  NameDescription
Public methodAddAdds an item to the list of selected items for a ListBox.
Public methodClearRemoves all items from the collection of selected items.
Public methodContainsDetermines whether the specified item is located within the collection.
Public methodCopyToCopies the entire collection into an existing array at a specified location within the array.
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetEnumeratorReturns an enumerator that can be used to iterate through the selected item collection.
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIndexOfReturns the index within the collection of the specified item.
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodRemoveRemoves the specified object from the collection of selected items.
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Public Extension MethodAsParallel()Overloaded. Enables parallelization of a query. (Defined by ParallelEnumerable.)
Public Extension MethodAsParallel()Overloaded. (Defined by ParallelEnumerable.)
Public Extension MethodAsQueryable()Overloaded. Converts an IEnumerable to an IQueryable. (Defined by Queryable.)
Public Extension MethodAsQueryable()Overloaded. (Defined by Queryable.)
Public Extension MethodCast<TResult>()Overloaded. Casts the elements of an IEnumerable to the specified type. (Defined by Enumerable.)
Public Extension MethodCast<TResult>()Overloaded. (Defined by Enumerable.)
Public Extension MethodOfType<TResult>()Overloaded. Filters the elements of an IEnumerable based on a specified type. (Defined by Enumerable.)
Public Extension MethodOfType<TResult>()Overloaded. (Defined by Enumerable.)
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  NameDescription
Explicit interface implemetationPrivate propertyICollection.IsSynchronizedInfrastructure. For a description of this member, see ICollection.IsSynchronized.
Explicit interface implemetationPrivate propertyICollection.SyncRootInfrastructure. For a description of this member, see ICollection.SyncRoot.
Explicit interface implemetationPrivate methodIList.AddInfrastructure. For a description of this member, see IList.Add.
Explicit interface implemetationPrivate methodIList.ClearInfrastructure. For a description of this member, see IList.Clear.
Explicit interface implemetationPrivate methodIList.InsertInfrastructure. For a description of this member, see IList.Insert.
Explicit interface implemetationPrivate propertyIList.IsFixedSizeInfrastructure. For a description of this member, see IList.IsFixedSize.
Explicit interface implemetationPrivate methodIList.RemoveInfrastructure. For a description of this member, see IList.Remove.
Explicit interface implemetationPrivate methodIList.RemoveAtInfrastructure. For a description of this member, see IList.RemoveAt.
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The ListBox.SelectedObjectCollection class stores the selected items in the ListBox. The items stored in the ListBox.SelectedObjectCollection are items contained within the ListBox.ObjectCollection class. The ListBox.ObjectCollection class stores all items displayed in the ListBox.

The following table is an example of how the ListBox.ObjectCollection stores the items of the ListBox as well as their selection states within an example ListBox.

Index

Item

Selection state within the ListBox

0

object1

Unselected

1

object2

Selected

2

object3

Unselected

3

object4

Selected

4

object5

Selected

Based on the ListBox.ObjectCollection demonstrated in the previous table, the following table demonstrates how the ListBox.SelectedObjectCollection would appear.

Index

Selected item from ObjectCollection

0

object2

1

object4

2

object5

You can use the properties and methods of this class to perform a variety of tasks with the collection. The Contains method enables you to determine whether an item from the ListBox.ObjectCollection class is a member of the ListBox.SelectedObjectCollection. Once you know that the item is located within the collection, you can use the IndexOf method to determine where a specific item within the ListBox.ObjectCollection for the ListBox is stored within the ListBox.SelectedObjectCollection.

.NET Framework

Supported in: 4.5.3, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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