相关疑难解决方法(0)

我正在使用Exchange Web服务托管API来处理任务(Exchange 2007 SP1).我可以创造它们.但是,当我尝试进行更新时,它适用于除.Body字段之外的所有字段.每当我尝试访问(读取/更新)该字段时,它都会出现以下错误:

"You must load or assign this property before you can read its value."

我使用的代码如下所示:

   //impersonate the person whose tasks you want to read
   Me.Impersonate(userName); //home-made function to handle impersonation

   //build the search filter
   Exchange.SearchFilter.SearchFilterCollection filter = New Exchange.SearchFilter.SearchFilterCollection();
   filter.Add(New Exchange.SearchFilter.IsEqualTo(Exchange.TaskSchema.Categories, "Sales"));

   //do the search
   EWS.Task exTask = esb.FindItems(Exchange.WellKnownFolderName.Tasks, filter, New Exchange.ItemView(Integer.MaxValue));

   exTask.Subject = txtSubject.Text;  //this works fine
   exTask.Body = txtBody.Text; //This one gives the error implying that the object isn't loaded

奇怪的是,检查属性包显示该对象包含33个属性,但{Body}不是其中之一.该属性似乎是从基类.Item或其他东西继承而来的.

那么,我是否需要将对象重新加载为类型Item？或者通过.Bind或其他东西重装？请记住,我需要使用数千个项目来完成此操作,因此效率对我来说很重要.