VisualBasicReference<TResult> Class

Definition

Namespace:

Microsoft.VisualBasic.Activities

Assembly:

System.Activities.dll

Contains an expression in Visual Basic syntax that evaluates to an l-value, which supports binding of the Out arguments.

generic <typename TResult>
public ref class VisualBasicReference sealed : System::Activities::CodeActivity<System::Activities::Location<TResult> ^>, System::Activities::Expressions::ITextExpression, System::Activities::XamlIntegration::IValueSerializableExpression

public sealed class VisualBasicReference<TResult> : System.Activities.CodeActivity<System.Activities.Location<TResult>>, System.Activities.Expressions.ITextExpression, System.Activities.XamlIntegration.IValueSerializableExpression

type VisualBasicReference<'Result> = class
    inherit CodeActivity<Location<'Result>>
    interface IValueSerializableExpression
    interface ITextExpression

Public NotInheritable Class VisualBasicReference(Of TResult)
Inherits CodeActivity(Of Location(Of TResult))
Implements ITextExpression, IValueSerializableExpression

Type Parameters

TResult

The type of the expression.

Inheritance

Object

Activity

ActivityWithResult

Activity<TResult>

CodeActivity<Location<TResult>>

VisualBasicReference<TResult>

Implements

IValueSerializableExpression ITextExpression

Remarks

This activity uses the LINQ to Entity provider to evaluate LINQ expressions. Any LINQ expressions used with this activity must be evaluatable by the ADO.Net Entity Data Model. For example, LINQ expressions cannot be used to reference activities, variables, or arguments of the workflow itself.

Constructors

VisualBasicReference<TResult>()	Initializes a new instance of the VisualBasicReference<TResult> class.
VisualBasicReference<TResult>(String)	Initializes a new instance of the VisualBasicReference<TResult> class using the specific expression.

Properties

CacheId	Gets the identifier of the cache that is unique within the scope of the workflow definition. (Inherited from Activity)
Constraints	Gets a collection of Constraint activities that can be configured to provide validation for the Activity. (Inherited from Activity)
DisplayName	Gets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking. (Inherited from Activity)
ExpressionText	Gets or sets the Visual Basic expression represented by this VisualBasicReference<TResult>.
Id	Gets an identifier that is unique in the scope of the workflow definition. (Inherited from Activity)
Implementation	Not supported. (Inherited from CodeActivity<TResult>)
ImplementationVersion	Gets or sets the implementation version of the activity. (Inherited from CodeActivity<TResult>)
Language	Gets the language used in the reference.
RequiresCompilation	Gets whether the reference requires compilation.
Result	Gets or sets the result argument for the Activity<TResult>. (Inherited from Activity<TResult>)
ResultType	When implemented in a derived class, gets the type of an activity OutArgument. (Inherited from ActivityWithResult)

Methods

CacheMetadata(ActivityMetadata)	Not implemented. Use CacheMetadata(CodeActivityMetadata) instead. (Inherited from CodeActivity<TResult>)
CacheMetadata(CodeActivityMetadata)	Creates and validates a description of the activity's arguments, variables, child activities, and activity delegates. (Inherited from CodeActivity<TResult>)
CanConvertToString(IValueSerializerContext)	Determines whether the VisualBasicReference<TResult> can be converted into a String.
ConvertToString(IValueSerializerContext)	Converts the VisualBasicReference<TResult> to a String.
Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
Execute(CodeActivityContext)	When implemented in a derived class, performs the execution of the activity. (Inherited from CodeActivity<TResult>)
GetExpressionTree()	Gets the expression tree used in the reference.
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetType()	Gets the Type of the current instance. (Inherited from Object)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
OnCreateDynamicUpdateMap(UpdateMapMetadata, Activity)	Raises an event when creating a map for the dynamic update. (Inherited from CodeActivity<TResult>)
ShouldSerializeDisplayName()	Indicates whether the DisplayName property should be serialized. (Inherited from Activity)
ToString()	Returns a String that contains the Id and DisplayName of the Activity. (Inherited from Activity)