SqlTrackingQueryOptions.StatusMaxDateTime 属性

定义

命名空间:

System.Workflow.Runtime.Tracking

程序集:

System.Workflow.Runtime.dll

获取或设置一个指定时段上限的 DateTime，可以将其与 WorkflowStatus 结合使用来约束 SqlTrackingWorkflowInstance 调用所返回 GetWorkflows(SqlTrackingQueryOptions) 对象的集合。

public:
 property DateTime StatusMaxDateTime { DateTime get(); void set(DateTime value); };

public DateTime StatusMaxDateTime { get; set; }

member this.StatusMaxDateTime : DateTime with get, set

Public Property StatusMaxDateTime As DateTime

属性值

DateTime

一个 DateTime，它指定用于匹配工作流实例（带有由 WorkflowStatus 指定的状态）的时段的上限。 默认值为 DateTime.MinValue。

示例

下面的示例演示如何设置 StatusMaxDateTime 属性。 此示例摘自工作流监视器 SDK 示例。 有关详细信息，请参阅 工作流监视器示例。

try
{
    List<SqlTrackingWorkflowInstance> queriedWorkflows = new List<SqlTrackingWorkflowInstance>();
    SqlTrackingQuery sqlTrackingQuery = new SqlTrackingQuery(connectionString);
    SqlTrackingQueryOptions sqlTrackingQueryOptions = new SqlTrackingQueryOptions();
    sqlTrackingQueryOptions.StatusMinDateTime = from.ToUniversalTime();
    sqlTrackingQueryOptions.StatusMaxDateTime = until.ToUniversalTime();
    // If QualifiedName, FieldName, or DataValue is not supplied, we will not query since they are all required to match
    if (!((string.Empty == trackingDataItemValue.QualifiedName) || (string.Empty == trackingDataItemValue.FieldName) || ((string.Empty == trackingDataItemValue.DataValue))))
        sqlTrackingQueryOptions.TrackingDataItems.Add(trackingDataItemValue);

    queriedWorkflows.Clear();

    if ("created" == workflowEvent.ToLower(CultureInfo.InvariantCulture))
    {
        sqlTrackingQueryOptions.WorkflowStatus = WorkflowStatus.Created;
        queriedWorkflows.AddRange(sqlTrackingQuery.GetWorkflows(sqlTrackingQueryOptions));
    }
    else if ("completed" == workflowEvent.ToLower(CultureInfo.InvariantCulture))
    {
        sqlTrackingQueryOptions.WorkflowStatus = WorkflowStatus.Completed;
        queriedWorkflows.AddRange(sqlTrackingQuery.GetWorkflows(sqlTrackingQueryOptions));
    }
    else if ("running" == workflowEvent.ToLower(CultureInfo.InvariantCulture))
    {
        sqlTrackingQueryOptions.WorkflowStatus = WorkflowStatus.Running;
        queriedWorkflows.AddRange(sqlTrackingQuery.GetWorkflows(sqlTrackingQueryOptions));
    }
    else if ("suspended" == workflowEvent.ToLower(CultureInfo.InvariantCulture))
    {
        sqlTrackingQueryOptions.WorkflowStatus = WorkflowStatus.Suspended;
        queriedWorkflows.AddRange(sqlTrackingQuery.GetWorkflows(sqlTrackingQueryOptions));
    }
    else if ("terminated" == workflowEvent.ToLower(CultureInfo.InvariantCulture))
    {
        sqlTrackingQueryOptions.WorkflowStatus = WorkflowStatus.Terminated;
        queriedWorkflows.AddRange(sqlTrackingQuery.GetWorkflows(sqlTrackingQueryOptions));
    }
    else if (("all" == workflowEvent.ToLower(CultureInfo.InvariantCulture)) || string.IsNullOrEmpty(workflowEvent))
    {
        sqlTrackingQueryOptions.WorkflowStatus = WorkflowStatus.Created;
        queriedWorkflows.AddRange(sqlTrackingQuery.GetWorkflows(sqlTrackingQueryOptions));

        sqlTrackingQueryOptions.WorkflowStatus = WorkflowStatus.Completed;
        queriedWorkflows.AddRange(sqlTrackingQuery.GetWorkflows(sqlTrackingQueryOptions));

        sqlTrackingQueryOptions.WorkflowStatus = WorkflowStatus.Running;
        queriedWorkflows.AddRange(sqlTrackingQuery.GetWorkflows(sqlTrackingQueryOptions));

        sqlTrackingQueryOptions.WorkflowStatus = WorkflowStatus.Suspended;
        queriedWorkflows.AddRange(sqlTrackingQuery.GetWorkflows(sqlTrackingQueryOptions));

        sqlTrackingQueryOptions.WorkflowStatus = WorkflowStatus.Terminated;
        queriedWorkflows.AddRange(sqlTrackingQuery.GetWorkflows(sqlTrackingQueryOptions));
    }
    return queriedWorkflows;
}
catch (Exception exception)
{
    throw new Exception("Exception in GetWorkflows", exception);
}

注解

SqlTrackingQueryOptions 约束由 SqlTrackingWorkflowInstance 调用返回到这些工作流实例的 SqlTrackingQuery.GetWorkflows 对象的集合，这些工作流实例具有由 Type 指定的 WorkflowType，具有由 WorkflowStatus 在 StatusMinDateTime 和 StatusMaxDateTime 所指定期间指定的状态，并具有至少与一个 TrackingDataItemValue 所指定 TrackingDataItems 对象匹配的已提取数据。

由 DateTime 指定的 StatusMaxDateTime 值包含在内。 有关如何匹配工作流实例的状态的更多信息，请参见 WorkflowStatus 属性。

注意

如果 WorkflowStatus 设置为 Null，则会忽略 StatusMaxDateTime 和 StatusMinDateTime。 调用 GetWorkflows 时将返回所有工作流实例。