我正在使用CRM online 2015的自定义插件,每次我尝试从“Email.To ”访问活动对象时,我都会
"base {System.SystemException} = {"Unable to cast object of type 'Microsoft.Xrm.Sdk.Entity' to type ...ActivityParty'."}"
以下是我的代码的样子:
public class PreCreate : Plugin
{
public PreCreate()
: base(typeof(PreCreate))
{
base.RegisteredEvents.Add(new Tuple<int, string, string, Action<LocalPluginContext>>(20, "Create", "email", new Action<LocalPluginContext>(ExecutePreEntityCreate)));
}
public void ExecutePreEntityCreate(LocalPluginContext localContext)
{
var target = (Entity)localContext.PluginExecutionContext.InputParameters["Target"];
using (var context = new XrmServiceContext(localContext.OrganizationService))
{
var email = target.ToEntity<Email>(); //The entity has the right values
var activityPartyList=email.To // here I see the exception
//If I use the following code:
var activityParty = email.GetAttributeValue<EntityCollection>("to");
//I get an empty ActivityParty(empty Id)
}
}
}
我是否必须为activityparty类型进行一些初始化?
答案 0 :(得分:2)
代码没有问题,字段Email.To将返回EntityCollection并获取您需要使用的内容:
var entityCollection = email.GetAttributeValue<EntityCollection>("to");
这将为您提供需要转换为ActivityParty(entityCollection.Entities)的实体集合。 要转换您需要的实体:
foreach (var entityItem in entityCollection.Entities)
{
var ap = entityItem.ToEntity<ActivityParty>();
//Here you will get the LogicalName in this case Lead
// the Id and the name
var leadId = ap.PartyId.Id;
//To get the Lead
var lead=context.LeadSet.FirstOrDefault(l => l.Id == leadId);
}