PersistenceParticipant.PublishValues(IDictionary<XName,Object>) 方法

定义

命名空间:

System.Activities.Persistence

程序集:

System.Activities.dll

主机调用此方法，并传递 InstanceData 集合中所有加载的值（由 LoadWorkflowCommand 或 LoadWorkflowByInstanceKeyCommand 填充）作为字典参数。

protected:
 virtual void PublishValues(System::Collections::Generic::IDictionary<System::Xml::Linq::XName ^, System::Object ^> ^ readWriteValues);

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

abstract member PublishValues : System.Collections.Generic.IDictionary<System.Xml.Linq.XName, obj> -> unit
override this.PublishValues : System.Collections.Generic.IDictionary<System.Xml.Linq.XName, obj> -> unit

Protected Overridable Sub PublishValues (readWriteValues As IDictionary(Of XName, Object))

参数

readWriteValues

IDictionary<XName,Object>

从持久性存储中加载的读/写值。 此字典与由在最近的持久性段中保留的读/写值组成的字典相对应。

示例

下面的代码示例演示如何在一个从 PersistenceParticipant 派生的类中使用 PublishValues。 此示例摘自 持久性参与者 示例。

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;
        }
    }
}