如何以编程方式将事件接收器附加到SPList？

Question

我正在开发一个SharePoint 2010项目,我有几个站点.每个站点下都包含一个包含新闻的列表,我想将事件接收器附加到这些列表中.

下面的站点和列表是以编程方式创建的,但我无法附加我在VS2010解决方案中的事件接收器.

我试过这个:

SPList list = new SPSite(siteURL).OpenWeb().Lists[listName]; 
SPEventReceiverDefinitionCollection eventReceivers = list.EventReceivers;

SPEventReceiverDefinition eventReceiver = eventReceivers.Add();
eventReceiver.Name = receiverName;
eventReceiver.Synchronization = SPEventReceiverSynchronization.Synchronous; 
eventReceiver.Type = SPEventReceiverType.ItemAdded;
eventReceiver.SequenceNumber = sequenceNumber; 
eventReceiver.Assembly = assemblyFullName;
eventReceiver.Class = assemblyClassName;
eventReceiver.Data = receiverData;

eventReceiver.Update();

但它不起作用.

错误消息是"无法加载文件或程序集'Projekt_Test1 \,\,Version\= 1.0.1777.23493 \,Culture\= neutral \,PublicKeyToken\= 49c7547d535382ab'或其依赖项之一.给定的程序集名称或代码库无效.(HRESULT异常:0x80131047)"

感谢帮助.

Answer 1

我最终为此创建了一个List Extension方法:

public static void EnsureEventReceiver(this SPList list,IEnumerable<SPEventReceiverType> receiverTypes, Type eventHander, SPEventReceiverSynchronization synchronization, int sequenceNumber)
{
   foreach (SPEventReceiverType spEventReceiverType in receiverTypes)
   {
      string name = list.Title + spEventReceiverType.ToString();

      if (list.EventReceivers.Cast<SPEventReceiverDefinition>().All(i => i.Name != name))
      {
          SPEventReceiverDefinition eventReceiver = list.EventReceivers.Add();
          eventReceiver.Name = name;
          eventReceiver.Type = spEventReceiverType;
          eventReceiver.Assembly = eventHander.Assembly.FullName;
          eventReceiver.Class = eventHander.FullName;
          eventReceiver.SequenceNumber = sequenceNumber;
          eventReceiver.Synchronization = synchronization;
          eventReceiver.Update();
      }
   }    
}

警告,此方法的局限性:

• 每个列表只有一个事件,因为这对我来说已经足够了,如果你需要更多,那么你需要将名称作为参数传递
• 事件处理程序方法属于同一个类

你可以像这样使用它:

list.EnsureEventReceiver(
     new[] { SPEventReceiverType.ItemAdded, SPEventReceiverType.ItemUpdated },
     typeof(NewsItemsHandler),
     SPEventReceiverSynchronization.Synchronous, 
     10000);