ListBox.SelectedObjectCollection Class
Represents the collection of selected items in the ListBox.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The ListBox.SelectedObjectCollection type exposes the following members.
| Name | Description | |
|---|---|---|
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ListBox.SelectedObjectCollection | Initializes a new instance of the ListBox.SelectedObjectCollection class. |
| Name | Description | |
|---|---|---|
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Count | Gets the number of items in the collection. |
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IsReadOnly | Gets a value indicating whether the collection is read-only. |
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Item | Gets the item at the specified index within the collection. |
| Name | Description | |
|---|---|---|
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Add | Adds an item to the list of selected items for a ListBox. |
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Clear | Removes all items from the collection of selected items. |
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Contains | Determines whether the specified item is located within the collection. |
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CopyTo | Copies the entire collection into an existing array at a specified location within the array. |
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Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
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Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
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GetEnumerator | Returns an enumerator that can be used to iterate through the selected item collection. |
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GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
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GetType | Gets the Type of the current instance. (Inherited from Object.) |
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IndexOf | Returns the index within the collection of the specified item. |
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MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
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Remove | Removes the specified object from the collection of selected items. |
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ToString | Returns a string that represents the current object. (Inherited from Object.) |
| Name | Description | |
|---|---|---|
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AsParallel | Enables parallelization of a query. (Defined by ParallelEnumerable.) |
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AsQueryable | Converts an IEnumerable to an IQueryable. (Defined by Queryable.) |
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Cast<TResult> | Casts the elements of an IEnumerable to the specified type. (Defined by Enumerable.) |
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OfType<TResult> | Filters the elements of an IEnumerable based on a specified type. (Defined by Enumerable.) |
| Name | Description | |
|---|---|---|
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ICollection.IsSynchronized | Infrastructure. For a description of this member, see ICollection.IsSynchronized. |
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ICollection.SyncRoot | Infrastructure. For a description of this member, see ICollection.SyncRoot. |
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IList.Add | Infrastructure. For a description of this member, see IList.Add. |
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IList.Clear | Infrastructure. For a description of this member, see IList.Clear. |
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IList.Insert | Infrastructure. For a description of this member, see IList.Insert. |
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IList.IsFixedSize | Infrastructure. For a description of this member, see IList.IsFixedSize. |
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IList.Remove | Infrastructure. For a description of this member, see IList.Remove. |
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IList.RemoveAt | Infrastructure. For a description of this member, see IList.RemoveAt. |
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 |
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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 |
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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.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
