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OleDbConnectionStringBuilder.ContainsKey Method

Determines whether the OleDbConnectionStringBuilder contains a specific key.

Namespace:  System.Data.OleDb
Assembly:  System.Data (in System.Data.dll)

public override bool ContainsKey(
	string keyword


Type: System.String

The key to locate in the OleDbConnectionStringBuilder.

Return Value

Type: System.Boolean
true if the OleDbConnectionStringBuilder contains an element that has the specified key; otherwise false.


keyword is null (Nothing in Visual Basic).

Although setting the Provider property may implicitly fill in appropriate key/value pairs for the provider, the ContainsKey method does not return true for implicitly provided keys. This method returns true only for explicitly provided keys.

The following example creates an OleDbConnectionStringBuilder instance, sets some of its properties, and then tries to determine whether various keys exist within the object by calling the ContainsKey method.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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