EasyUA Reference
ExtractValueFromVariant<T>(ISystemContext,Object,Boolean) Method
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Opc.Ua.Core.Net4 Assembly > Opc.Ua Namespace > BaseVariableState Class > ExtractValueFromVariant Method : ExtractValueFromVariant<T>(ISystemContext,Object,Boolean) Method

Visual Basic (Usage)
C#

context: The context.

value: The value.

throwOnError: if set to true throws the ServiceResultException on error, otherwise default value for T is returned .

Converts a values contained in a variant to the value defined for the variable.

Syntax

Visual Basic (Usage)	Copy Code
Dim context As ISystemContext Dim value As Object Dim throwOnError As Boolean Dim value As Object value = BaseVariableState.ExtractValueFromVariant(Of T)(context, value, throwOnError)

Visual Basic (Usage)

Copy Code

Dim context As ISystemContext
Dim value As Object
Dim throwOnError As Boolean
Dim value As Object
 
value = BaseVariableState.ExtractValueFromVariant(Of T)(context, value, throwOnError)

C#
public static object ExtractValueFromVariant<T>( ISystemContext context, object value, bool throwOnError )

public static object ExtractValueFromVariant<T>( 
   ISystemContext context,
   object value,
   bool throwOnError
)

Parameters

context: The context.
value: The value.
throwOnError: if set to true throws the ServiceResultException on error, otherwise default value for T is returned .

Type Parameters

T: The framework type of value contained in this instance.

Return Value

The value of the T type.

Exceptions

Exception	Description
ServiceResultException	If cannot convert value.

Remarks

If throwOnError is false the default value for the type is returned if the value is not valid.

Requirements

Target Platforms: Windows 7/8/10, Windows Server 2003/2008/2012/2015, .NET4.x