Export (0) Print
Expand All

DbConnectionStringBuilder.TryGetValue Method

Retrieves a value corresponding to the supplied key from this DbConnectionStringBuilder.

Namespace: System.Data.Common
Assembly: System.Data (in system.data.dll)

public:
virtual bool TryGetValue (
	String^ keyword, 
	[OutAttribute] Object^% value
)
public boolean TryGetValue (
	String keyword, 
	/** @attribute OutAttribute() */ /** @ref */ Object value
)
Not applicable.

Parameters

keyword

The key of the item to retrieve.

value

The value corresponding to the key.

Return Value

true if keyword was found within the connection string, false otherwise.

Exception typeCondition

ArgumentNullException

keyword contains a null value (Nothing in Visual Basic).

The TryGetValue method lets developers safely retrieve a value from a DbConnectionStringBuilder without needing to first call the ContainsKey method. Because TryGetValue does not raise an exception when you call it, passing in a nonexistent key, you do not have to look for a key before retrieving its value. Calling TryGetValue with a nonexistent key will place the null value (Nothing in Visual Basic) in the value parameter.

The following example calls the TryGetValue method, demonstrating several possible outcomes.

No code example is currently available or this language may not be supported.

The sample displays the following results:

Provider=sqloledb
DATA SOURCE=192.168.168.1,1433
Unable to retrieve value for //InvalidKey//
Unable to retrieve value for null key.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, 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

Community Additions

ADD
Show:
© 2014 Microsoft