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.NET Development
.NET Framework 3.5
 IndexOf Method
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This page is specific to
Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:
.NET Framework Class Library
ComboBox..::.ObjectCollection..::.IndexOf Method

Retrieves the index within the collection of the specified item.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)
Visual Basic (Declaration)
Public Function IndexOf ( _
    value As Object _
) As Integer
Visual Basic (Usage)
Dim instance As ComboBox..::.ObjectCollection
Dim value As Object
Dim returnValue As Integer

returnValue = instance.IndexOf(value)
C#
public int IndexOf(
    Object value
)
Visual C++
public:
virtual int IndexOf(
    Object^ value
) sealed
JScript
public final function IndexOf(
    value : Object
) : int

Parameters

value
Type: System..::.Object
An object representing the item to locate in the collection.

Return Value

Type: System..::.Int32
The zero-based index where the item is located within the collection; otherwise, -1.

Implements

IList..::.IndexOf(Object)
ExceptionCondition
ArgumentNullException

The value parameter was nullNothingnullptra null reference (Nothing in Visual Basic).

The IndexOf method enables you to determine where an item is located within the collection. To determine if an item is located within the collection before calling this method, use the Contains method.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

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

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0
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