While.Condition Property

.NET Framework (current version)
 
System_CAPS_noteNote

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The Activity<TResult> to be evaluated before each iteration of the While loop.

Namespace:   System.Activities.Statements
Assembly:  System.Activities (in System.Activities.dll)

[DependsOnAttribute("Variables")]
public Activity<bool> Condition { get; set; }

Property Value

Type: System.Activities.Activity<Boolean>

The condition.

The following code sample demonstrates setting the Condition property of a While activity. This example is from the Content-Based Correlation sample.

new While
{
    Condition = true,
    Body = new Receive
    {
        ServiceContractName = Constants.POContractName,
        OperationName = Constants.UpdatePOName,                                    
        CorrelatesWith = poidHandle, // identifies that the UpdatePO operation is waiting on the PurchaseOrderId that was used to initialize this handle
        CorrelatesOn = new MessageQuerySet // the query that is used on an incoming message to find the requisite PurchaseOrderId specified in the correlation
        {
            // Id is the name of the incoming parameter within the PurchaseOrder
            { "PoId", new XPathMessageQuery("sm:body()/defns:PurchaseOrder/defns:Id", Constants.XPathMessageContext) } 
        },
        Content = ReceiveContent.Create(new OutArgument<PurchaseOrder>(po)) // creates a ReceiveMessageContent
    }
},

.NET Framework
Available since 4.0
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