如何程序设置SharePoint Designer工作流的启动变量

SharePoint Designer工作流的初始界面，是一个系统默认生成的aspx页面，可以在该页面上设置启动变量，但是该界面太过于简陋，并且不支持某些控件，比如用户控件，如果想在启动的时候指定审核人员，那只有定制该页面，并将用户输入的值传递给流程。

另外，在某些情况下，也需要通过程序自动启动流程，并将初始变量传递给工作流，那该怎样做呢？

工作流启动的方法：

spSite.WorkflowManager.StartWorkflow(SPListItem spListItem, SPWorkflowAssociation associationTemplate, string initiationData, bool thebool);

其中变量initiationData即记录了启动流程需要的初始变量，其格式如下：

<wfiniprops>
   <myreviewer>
       anetdemo\user01
   </myreviewer> 
   <myapprover>
       anetdemo\administrator
   </myapprover>
</wfiniprops>;

 

wfiniprops名字可以任意，myreviewer和myapprover必须和初始化变量名称一致。

 

示例代码：

using (SPSite site = new SPSite("http://yoursite:port/weburl"))
            {
                using (SPWeb web = site.OpenWeb())
                {
                    SPList list = web.Lists["listName"];
                    SPListItem item = list.GetItemById(18);

                    string assciationData = "<wfiniprops>" +
                                                                "<myreviewer>" +
                                                                    "mydomain\\user01" +
                                                                "</myreviewer>" +
                                                                "<myapprover>" +
                                                                    "mydomain\\administrator" +
                                                                "</myapprover>" +
                                                            "</wfiniprops>";
                    SPWorkflowAssociationCollection objWorkflowAssociationCollection = list.WorkflowAssociations;
                    Guid wfGuid = getGuidOfWorkflow(list, "工作流 1");
                    SPWorkflowAssociation wrkFl = list.WorkflowAssociations[wfGuid];

                    wrkFl.AssociationData = assciationData;

                    site.WorkflowManager.StartWorkflow(item, wrkFl, wrkFl.AssociationData, true);

                }
            }

 

。。。

 

/// <summary>
        /// 通过工作流名称获得其Guid的方法
        /// </summary>
        /// <param name="splist"></param>
        /// <param name="workflowName"></param>
        /// <returns></returns>
        public static Guid getGuidOfWorkflow(SPList splist, string workflowName)
        {
            SPWorkflowAssociationCollection workflowsAssociations = splist.WorkflowAssociations;
            foreach (SPWorkflowAssociation spwa in workflowsAssociations)
            {
                if (spwa.Name.Equals(workflowName) && spwa.Enabled)
                {
                    return spwa.Id;
                }

            }
            return new Guid();
        }