ListBox.ObjectCollection.IList.Add(Object) Method

Reference

Definition

Namespace:: System.Windows.Forms

Assembly:: System.Windows.Forms.dll

Important

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Adds an object to the ListBox class.

This API supports the product infrastructure and is not intended to be used directly from your code.

 virtual int System.Collections.IList.Add(System::Object ^ item) = System::Collections::IList::Add;

int IList.Add (object item);

int IList.Add (object? item);

abstract member System.Collections.IList.Add : obj -> int
override this.System.Collections.IList.Add : obj -> int

Function Add (item As Object) As Integer Implements IList.Add

Parameters

item: Object

The object to be added to the ListBox.

Returns

Int32

The position into which the new element was inserted, or -1 to indicate that the item was not inserted into the collection.

Implements

Add(Object)

Exceptions

ArgumentNullException

item is null.

ArgumentException

The current ListBox has a data source.

SystemException

There is insufficient space available to store the new item.

Remarks

This member is an explicit interface member implementation. It can be used only when the ListBox.ObjectCollection instance is cast to an IList interface.

Applies to