SharePoint 2013 app 实战之 RemoteEventReceiver

RemoteEventReceiver 是在SharePoint 2013 app中引入的一个新特性，它可以在SharePoint 内容触发某个事件（删除item，添加item,修改 item等）时调用一个远程的WCF 服务，在这个远程的WCF服务 的 publicSPRemoteEventResult ProcessEvent(SPRemoteEventProperties properties) 方法中你可以对这个事件做进一步处理，最终返回一个 SPRemoteEventResult来标示是否继续改事件(比如可以返回 result.Status =SPRemoteEventServiceStatus.CancelWithError; 来终止事件)。

 

本文新建app的过程略过，不会的博友请参考：http://blog.csdn.net/farawayplace613/article/details/8677596。

下面说明下步骤：

1. 新建 RemoteEventReceiver

    a. 选中SharePoint app project, 右击 => New Item, 选择 RemoteEventReceiver,点击 Add

     

    b. 类型选择"List Item Events", 事件源选择 "Custom List",处理事件选择"An Item is being added","An Item is being deleted","An Item is being updated", 点击Finish

   

    c. 完成后在SharePoint App web project中会多出一个 RemoteEventReceiver1.svc

    

 

2. 在SharePoint app project中添加一个List instance 用于测试

 

3. 更新RemoteEventReceiver1.svc.cs中的代码(若遇到delete item则，报错并终止删除事件)

using System;using System.Collections.Generic;using System.Linq;using System.Text;using Microsoft.SharePoint.Client;using Microsoft.SharePoint.Client.EventReceivers;namespace SharePointApp9Web{    public class RemoteEventReceiver1 : IRemoteEventService    {        public SPRemoteEventResult ProcessEvent(SPRemoteEventProperties properties)        {            SPRemoteEventResult result = new SPRemoteEventResult();            using (ClientContext clientContext = TokenHelper.CreateRemoteEventReceiverClientContext(properties))            {                if (clientContext != null)                {                    clientContext.Load(clientContext.Web);                    clientContext.ExecuteQuery();                }            }            if (properties.EventType == SPRemoteEventType.ItemDeleting)            {                                    result.ErrorMessage = "You can't delete!";                    result.Status = SPRemoteEventServiceStatus.CancelWithError;                            }                    return result;        }        public void ProcessOneWayEvent(SPRemoteEventProperties properties)        {        }    }}

4. 调试 RemoteEventReceiver

   a.点击VS2012的start

   b. 选择trust 该app

   c. 打开 http://YourSharePointServer/YourAppName/Lists/List1 (注意替换YourSharePointServer，YourAppName)

   d. 添加一个 item

   e. 在ProcessEvent 方法中设置若干断点

   f. 尝试删除一个Item

   

    
   5. 当尝试删除一个Item时效果为：

    

 

   6. 为App web之外的list 注册 RemoteEventReceiver

     注意，用以上方法添加的RemoteEventReceiver只能作用于App web 中的list(内容)，如果要给App web之外的list(如Host web 中的list) 注册 RemoteEventReceiver就需要使用如下Client Ojbet代码：

// need add name space using System.Reflection;EventReceiverDefinitionCreationInformation eventReceiver = new EventReceiverDefinitionCreationInformation();                eventReceiver.EventType = EventReceiverType.ItemAdding;                eventReceiver.ReceiverAssembly = Assembly.GetExecutingAssembly().FullName;                eventReceiver.ReceiverClass = "HTools_EventReceiver";                eventReceiver.ReceiverName = "HTools_EventReceiver";                eventReceiver.ReceiverUrl = "http://hh-wks-robb:2145/HTools_EventReceiver.svc";                eventReceiver.SequenceNumber = 1000;                Web web = SPutil.getSP("http://sub.domain.com/sites/apps");                List targetList = web.Lists.GetByTitle("Host Web List");                targetList.EventReceivers.Add(eventReceiver);                                web.Context.ExecuteQuery();

 

   常见问题:

         a. 如果不能触发RemoteEventReceiver,请尝试为Host web 开启SSL ：     http://blogs.msdn.com/b/fabdulwahab/archive/2013/01/21/configure-ssl-for-sharepoint-2013.aspx

         

        b. 如果遇到"Could not establish trust relationship with remote server",请于请求代码前加上：

           TokenHelper.TrustAllCertificates();