ComboBox.ObjectCollection ComboBox.ObjectCollection ComboBox.ObjectCollection ComboBox.ObjectCollection Class

Definition

Represents the collection of items in a ComboBox.

public: ref class ComboBox::ObjectCollection : System::Collections::IList
[System.ComponentModel.ListBindable(false)]
public class ComboBox.ObjectCollection : System.Collections.IList
type ComboBox.ObjectCollection = class
    interface IList
    interface ICollection
    interface IEnumerable
Public Class ComboBox.ObjectCollection
Implements IList
Inheritance
ComboBox.ObjectCollectionComboBox.ObjectCollectionComboBox.ObjectCollectionComboBox.ObjectCollection
Attributes
Implements

Remarks

The System.Windows.Forms.ComboBox.ObjectCollection class encapsulates the items in the ComboBox. The object collection of a combo box can be used to manage many types of objects, including strings, images, and custom business objects.

You can add items to the collection in several ways. The Add method adds one object to the collection. To add a number of objects to the collection, it is best to create an array of items and assign with the AddRange method. To insert an object at a specific location within the collection, you can use the Insert method. To remove items at a known index in the collection you can use either the Remove method or the RemoveAt method. The Clear method removes all the items from the collection.

In addition to methods and properties for adding and removing items, the System.Windows.Forms.ComboBox.ObjectCollection also provides methods to find items within the collection. The Contains method enables you to determine if an object is a member of the collection. Once you know that the item is located within the collection, you can use the IndexOf method to determine where the item is located within the collection.

Constructors

ComboBox.ObjectCollection(ComboBox) ComboBox.ObjectCollection(ComboBox) ComboBox.ObjectCollection(ComboBox) ComboBox.ObjectCollection(ComboBox)

Initializes a new instance of ComboBox.ObjectCollection.

Properties

Count Count Count Count

Gets the number of items in the collection.

IsReadOnly IsReadOnly IsReadOnly IsReadOnly

Gets a value indicating whether this collection can be modified.

Item[Int32] Item[Int32] Item[Int32] Item[Int32]

Retrieves the item at the specified index within the collection.

Methods

Add(Object) Add(Object) Add(Object) Add(Object)

Adds an item to the list of items for a ComboBox.

AddRange(Object[]) AddRange(Object[]) AddRange(Object[]) AddRange(Object[])

Adds an array of items to the list of items for a ComboBox.

Clear() Clear() Clear() Clear()

Removes all items from the ComboBox.

Contains(Object) Contains(Object) Contains(Object) Contains(Object)

Determines if the specified item is located within the collection.

CopyTo(Object[], Int32) CopyTo(Object[], Int32) CopyTo(Object[], Int32) CopyTo(Object[], Int32)

Copies the entire collection into an existing array of objects at a specified location within the array.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator()

Returns an enumerator that can be used to iterate through the item collection.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Gets the Type of the current instance.

(Inherited from Object)
IndexOf(Object) IndexOf(Object) IndexOf(Object) IndexOf(Object)

Retrieves the index within the collection of the specified item.

Insert(Int32, Object) Insert(Int32, Object) Insert(Int32, Object) Insert(Int32, Object)

Inserts an item into the collection at the specified index.

MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
Remove(Object) Remove(Object) Remove(Object) Remove(Object)

Removes the specified item from the ComboBox.

RemoveAt(Int32) RemoveAt(Int32) RemoveAt(Int32) RemoveAt(Int32)

Removes an item from the ComboBox at the specified index.

ToString() ToString() ToString() ToString()

Returns a string that represents the current object.

(Inherited from Object)

Explicit Interface Implementations

ICollection.CopyTo(Array, Int32) ICollection.CopyTo(Array, Int32) ICollection.CopyTo(Array, Int32) ICollection.CopyTo(Array, Int32)

For a description of this member, see CopyTo(Array, Int32).

ICollection.IsSynchronized ICollection.IsSynchronized ICollection.IsSynchronized ICollection.IsSynchronized

For a description of this member, see IsSynchronized.

ICollection.SyncRoot ICollection.SyncRoot ICollection.SyncRoot ICollection.SyncRoot

For a description of this member, see SyncRoot.

IList.Add(Object) IList.Add(Object) IList.Add(Object) IList.Add(Object)

For a description of this member, see Add(Object).

IList.IsFixedSize IList.IsFixedSize IList.IsFixedSize IList.IsFixedSize

For a description of this member, see IsFixedSize.

Extension Methods

Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable)

Casts the elements of an IEnumerable to the specified type.

OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable)

Filters the elements of an IEnumerable based on a specified type.

AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable)

Enables parallelization of a query.

AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable)

Converts an IEnumerable to an IQueryable.

Applies to