Question

我正在将自定义解决方案升级到Sharepoint 2010.我想使用 WorkflowCompleted 事件处理程序，但我似乎无法获得相关的 SPListItem < / strong>来自事件属性。

我尝试使用 SPWorkflowEventProperties.ActivationProperties ，但这总是返回null（即使在 WorkflowStarted 事件处理程序中）。

如何从工作流事件处理程序（ SPListItem ， SPWeb ， SPSite 等）获取上下文？

Answer 1

我发现了同样的事情。 SPWorkflowEventProperties几乎没用，因为几乎所有东西都是null。它不会告诉状态（已批准，已拒绝等）。而且，最重要的是，它没有（直接）说明完成了哪个项目。希望这将在未来版本中得到解决。与此同时，我使用了以下内容：

public override void WorkflowCompleted(SPWorkflowEventProperties properties)
{
   using (SPSite site = new SPSite(properties.WebUrl))
   {
       using (SPWeb web = site.OpenWeb())
       {
           SPListItem task = GetApprovedTask(properties, web);
           SPListItem item = GetApprovedItem(web, task);
           if (null != item)
           {
               // TODO : process approved item
           }
       }
   }
}

private SPListItem GetApprovedItem(SPWeb web, SPListItem task)
{
   SPListItem item = null;
   if (null != task)
   {
       SPList list = web.Lists[new Guid(task[SPBuiltInFieldId.WorkflowListId].ToString())];
       item = list.GetItemById((int)task[SPBuiltInFieldId.WorkflowItemId]);
   }
   return item;
}

private SPListItem GetApprovedTask(SPWorkflowEventProperties properties, SPWeb web)
{
   SPListItem item = null;
   string caml = @"<Where><And><And><And><Eq><FieldRef Name='WorkflowOutcome' /><Value Type='Text'>Approved</Value></Eq><Eq><FieldRef Name='WorkflowInstanceID' /><Value Type='Guid'>{0}</Value></Eq></And><IsNotNull><FieldRef Name='WorkflowListId' /></IsNotNull></And><IsNotNull><FieldRef Name='WorkflowItemId' /></IsNotNull></And></Where>";
   SPQuery query = new SPQuery();
   query.Query = string.Format(caml, properties.InstanceId);
   query.RowLimit = 1;
   SPList list = web.Lists["Tasks"];
   SPListItemCollection items = list.GetItems(query);
   if (items.Count > 0)
   {
       item = items[0];
   }
   return item;
}

Answer 2

您可以使用InstanceId属性从工作流任务列表中检索SPListItem，如本文所示

http://blog.symprogress.com/2011/09/sp-2010-get-workflow-status-workflowcompleted-event/

Answer 3

如果你对细节更加慷慨，我可以更具体地回答。

但这通常是你需要做的事情：

设置特定于上下文的属性

public static DependencyProperty _ ContextProperty = System.Workflow.ComponentModel.DependencyProperty.Register（“ _Context”， typeof（WorkflowContext），typeof（MyCustomActivity））;

[说明（“网站背景”）] [类别（ “用户”）] [可浏览（真）] [DesignerSerializationVisibility（DesignerSerializationVisibility.Visible）]

public WorkflowContext __Context
{
    get
    {
        return ((WorkflowContext)(base.GetValue(MyCustomActivity.__ContextProperty)));
    }

    set
    {
        base.SetValue(MyCustomActivity.__ContextProperty, value);
    }
}

public static DependencyProperty __ListIdProperty
    = System.Workflow.ComponentModel.DependencyProperty.Register("__ListId",
    typeof(string), typeof(MyCustomActivity));

[ValidationOption（ValidationOption.Required）]

public string __ListId
{
    get
    {
        return ((string)(base.GetValue(MyCustomActivity.__ListIdProperty)));
    }

    set
    {
        base.SetValue(MyCustomActivity.__ListIdProperty, value);
    }
}

public static DependencyProperty __ListItemProperty
    = System.Workflow.ComponentModel.DependencyProperty.Register("__ListItem",
    typeof(int), typeof(MyCustomActivity));

[ValidationOption（ValidationOption.Required）]

public int __ListItem
{
    get
    {
        return ((int)(base.GetValue(MyCustomActivity.__ListItemProperty)));
    }

    set
    {
        base.SetValue(MyCustomActivity.__ListItemProperty, value);
    }
}

public static DependencyProperty __ActivationPropertiesProperty
    = DependencyProperty.Register("__ActivationProperties",
    typeof(Microsoft.SharePoint.Workflow.SPWorkflowActivationProperties), typeof(MyCustomActivity));

[ValidationOption（ValidationOption.Required）]

public Microsoft.SharePoint.Workflow.SPWorkflowActivationProperties __ActivationProperties
{
    get
    {
        return (Microsoft.SharePoint.Workflow.SPWorkflowActivationProperties)base.GetValue(MyCustomActivity.__ActivationPropertiesProperty);
    }

    set
    {
        base.SetValue(MyCustomActivity.__ActivationPropertiesProperty, value);
    }
}

您将获得__Context中的上下文以及来自__Context的所有内容，如下所示：

受保护的覆盖ActivityExecutionStatus 执行（ActivityExecutionContext executionContext）{ //提升调用事件以在工作流中执行自定义代码。 this.RaiseEvent（MyCustomActivity.InvokeEvent，这，EventArgs.Empty）;

SPWeb _cxtWeb = null;
String _strLinfo = "Dll;";
String _strTo = String.Empty;

// Set Context
try
{
    SPSecurity.RunWithElevatedPrivileges(delegate()
    {
        using (_cxtWeb = __Context.Web)
        {
            //_cxtWeb = __Context.Web;
            Guid _cListId = new Guid(__ListId);
            SPList _cSPList = _cxtWeb.Lists[_cListId]; // TimeLog
            SPListItem _cListItem = _cSPList.GetItemById(__ListItem);
            SMTPSERVER = _cxtWeb.Site.WebApplication
                                        .OutboundMailServiceInstance.Server.Address;
        }
    });
}
catch { /**/ }

}

如何从Sharepoint 2010中的工作流事件处理程序获取上下文

3 个答案: