//执行动作
        private void MyAction(string argAction)
        {
//创建连接对象
            SourceCode.Workflow.Client.Connection wfcon = new SourceCode.Workflow.Client.Connection();
//打开K2连接
            string k2Server = System.Configuration.ConfigurationManager.AppSettings["K2Server"];
string workflowServicePort = System.Configuration.ConfigurationManager.AppSettings["WorkflowServicePort"];
            wfcon.Open(k2Server + ":" + workflowServicePort);

//当前用户打开
            wfcon.ImpersonateUser(HttpContext.Current.User.Identity.Name);

//获取流程列表
            SourceCode.Workflow.Client.WorklistItem worklistitem = wfcon.OpenWorklistItem(SN);

/*
            //获取流程实例编号
            string[] _SN = SN.Split('_');
            int _ID = int.Parse(_SN[0]);
            //获取流程实例
            SourceCode.Workflow.Client.ProcessInstance proInst = wfcon.OpenProcessInstance(_ID);
            //DataFields赋值
            proInst.DataFields["TaskUsers"].Value = ddlTaskUsers.SelectedValue;
            //更新DataFields
            procinst.Update();
*/

//查找action(执行动作)
            foreach (SourceCode.Workflow.Client.Action action in worklistitem.Actions)
            {
if (action.Name.Equals(argAction))
                {
//执行动作
                    action.Execute();
                }
            }
            wfcon.Dispose();
        }

//转签
        protected void ProcRedirect(string argEmpName)
        {
//创建连接对象
            SourceCode.Workflow.Client.Connection wfcon = new SourceCode.Workflow.Client.Connection();

//打开K2连接
            string k2Server = System.Configuration.ConfigurationManager.AppSettings["K2Server"];
string workflowServicePort = System.Configuration.ConfigurationManager.AppSettings["WorkflowServicePort"];
            wfcon.Open(k2Server + ":" + workflowServicePort);

            wfcon.ImpersonateUser(HttpContext.Current.User.Identity.Name);

//获取流程列表
            SourceCode.Workflow.Client.WorklistItem worklistitem = wfcon.OpenWorklistItem(SN);
//转签
            worklistitem.Redirect(argEmpName);
//释放资源
            wfcon.Dispose();
        }