PersistenceParticipant.CollectValues 方法

protected:
 virtual void CollectValues([Runtime::InteropServices::Out] System::Collections::Generic::IDictionary<System::Xml::Linq::XName ^, System::Object ^> ^ % readWriteValues, [Runtime::InteropServices::Out] System::Collections::Generic::IDictionary<System::Xml::Linq::XName ^, System::Object ^> ^ % writeOnlyValues);

protected virtual void CollectValues(out System.Collections.Generic.IDictionary<System.Xml.Linq.XName,object> readWriteValues, out System.Collections.Generic.IDictionary<System.Xml.Linq.XName,object> writeOnlyValues);

abstract member CollectValues : IDictionary * IDictionary -> unit
override this.CollectValues : IDictionary * IDictionary -> unit

Protected Overridable Sub CollectValues (ByRef readWriteValues As IDictionary(Of XName, Object), ByRef writeOnlyValues As IDictionary(Of XName, Object))

參數

範例

以下程式碼範例示範如何在由 衍生 PersistenceParticipant的類別中使用 CollectValues。 此範例來自 持久性參與者 樣本。

public class StepCountExtension : PersistenceParticipant
{
    static XNamespace stepCountNamespace = XNamespace.Get("urn:schemas-microsoft-com:Microsoft.Samples.WF/WorkflowInstances/properties");
    static XName currentCountName = stepCountNamespace.GetName("CurrentCount");

    int currentCount;

    public int CurrentCount
    {
        get
        {
            return this.currentCount;
        }
    }

    internal void IncrementStepCount()
    {
        this.currentCount += 1;
    }

    protected override void CollectValues(out IDictionary<XName, object> readWriteValues, out IDictionary<XName, object> writeOnlyValues)
    {
        readWriteValues = new Dictionary<XName, object>(1) { { currentCountName, this.currentCount } };
        writeOnlyValues = null;
    }

    protected override void PublishValues(IDictionary<XName, object> readWriteValues)
    {
        object loadedData;
        if (readWriteValues.TryGetValue(currentCountName, out loadedData))
        {
            this.currentCount = (int)loadedData;
        }
    }
}

備註

主機將第一個字典中的讀寫值打包為InstanceValue集合的InstanceData物件，而第二個字典中則將唯寫值打包為InstanceValue物件，且OptionalWriteOnly標記為 。 如需詳細資訊，請參閱InstanceValueOptions。