MultidimensionalArrayItemReference<TItem> Class

Definition

Namespace:

System.Activities.Expressions

Assembly:

System.Activities.dll

Represents an element in a multidimensional array that can be used as an l-value in an expression.

generic <typename TItem>
public ref class MultidimensionalArrayItemReference sealed : System::Activities::CodeActivity<System::Activities::Location<TItem> ^>

[System.Windows.Markup.ContentProperty("Indices")]
public sealed class MultidimensionalArrayItemReference<TItem> : System.Activities.CodeActivity<System.Activities.Location<TItem>>

[<System.Windows.Markup.ContentProperty("Indices")>]
type MultidimensionalArrayItemReference<'Item> = class
    inherit CodeActivity<Location<'Item>>

Public NotInheritable Class MultidimensionalArrayItemReference(Of TItem)
Inherits CodeActivity(Of Location(Of TItem))

Type Parameters

TItem

The type of elements in the array.

Inheritance

Object

Activity

ActivityWithResult

Activity<TResult>

CodeActivity<Location<TItem>>

MultidimensionalArrayItemReference<TItem>

Attributes

ContentPropertyAttribute

Examples

The following code example uses MultidimensionalArrayItemReference<TItem> in an Assign activity to assign an integer value to the array element at row 1 and column 2 and prints the value of the array element to the console. The Assign activity is equivalent to the following statement when using arrays: array[1, 2] = 1;.

Note

Instead of instantiating the MultidimensionalArrayItemReference<TItem> l-value expression activity directly, it is strongly recommended that you call ConvertReference, which provides a higher level of abstraction and enables you to implement your workflow more intuitively.

public static void MultidimensionalArrayItemReferenceSample()  
{  
    // Create a variable to store a multidimensional array.  
    var arrayvar = new Variable<int[,]>("arrayvar", new int[4, 5]);  

    Activity myActivity = new Sequence  
    {  
        Variables = { arrayvar },  
        Activities =   
        {                      
            // Create an Assign activity to assign a value to the array item at index [1,2].  
            new Assign<int>  
            {  
                To = new MultidimensionalArrayItemReference<int>  
                {  
                    Array = arrayvar,  
                    Indices = {1, 2}  
                },  
                // Assign an integer value to the array item at row 1 column 2.  
                Value = 1,  
            },  
            // Print the array item value to the console.  
            new WriteLine()  
            {  
                Text = ExpressionServices.Convert<string>(ctx => arrayvar.Get(ctx)[1, 2].ToString()),  
            }  
        }  
    };  

    // Invoke the Sequence activity.  
    WorkflowInvoker.Invoke(myActivity);  
}  

Constructors

MultidimensionalArrayItemReference<TItem>()

Initializes a new instance of the MultidimensionalArrayItemReference<TItem> class.

Properties

Array	Gets or sets the array referenced by the MultidimensionalArrayItemReference<TItem>.
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)
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>)
Indices	Gets a collection of arguments that represent the indices of the element in the array.
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>)
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>)
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)