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BindingSource.IndexOf Method

Searches for the specified object and returns the index of the first occurrence within the entire list.

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

public virtual int IndexOf (
	Object value
public int IndexOf (
	Object value
public function IndexOf (
	value : Object
) : int
Not applicable.



The Object to locate in the underlying list represented by the List property. The value can be a null reference (Nothing in Visual Basic).

Return Value

The zero-based index of the first occurrence of the value parameter; otherwise, -1 if value is not in the list.

Although the implementation is dependent on the underlying list's IndexOf method, typically the following characteristics apply:

  • The List is searched starting at the first element and ending at the last element.

  • The underlying method performs a linear search; therefore, the average execution time is proportional to the value of the Count property.

  • The underlying method determines equality by calling the Equals method.

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

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

.NET Compact Framework

Supported in: 2.0