crm2011针对商机实体的插件问题

Question

我创建了crm2011插件，针对商机更新消息（Pre_operation）。在插件中，我使用电子邮件模板并使用电子邮件模板发送电子邮件。当我运行时，虽然模板ID是正确的，但插件无法发送带有电子邮件模板的电子邮件。我收到此错误消息“对象引用未设置为对象的实例”。请帮我...这里是我的插件代码..

namespace Ppp.CRM.Plugin.OpptBidOwnerChange 
{ 
public class BidOwnerChange : IPlugin 
{ 
    #region Class Level Variables 
    IServiceProvider _serviceProvider; 
    IOrganizationServiceFactory _serviceFactory = null; 
    IOrganizationService _service = null; 
    IPluginExecutionContext _context = null; 

    Entity _target = null; 
    Entity _preImage = null; 
    Entity _postImage = null; 
    Guid _currentUser; 
    Guid pre_bidownerid = Guid.Empty; 
    Guid tag_bidownerid = Guid.Empty; 
    Guid ownerid = Guid.Empty; 
    Guid opportunityid = Guid.Empty; 
    #endregion 

    #region IPlugin Members 
    public void Execute(IServiceProvider serviceProvider) 
    { 
     try 
     { 
      string message = null; 
      _serviceProvider = serviceProvider; 
      _context = (IPluginExecutionContext) 
             serviceProvider.GetService(typeof(IPluginExecutionContext)); 

      _serviceFactory = (IOrganizationServiceFactory)serviceProvider.GetService(typeof(IOrganizationServiceFactory)); 
      _currentUser = _context.UserId; 
      message = _context.MessageName.ToLower(); 

      if (message == "update")//message == "create" || 
      { 
       if (_context.InputParameters.Contains("Target") && _context.InputParameters["Target"] != null) 
        _target = (Entity)_context.InputParameters["Target"]; 

       if (_context.PreEntityImages.Contains("PreImage") && _context.PreEntityImages["PreImage"] != null) 
        _preImage = (Entity)_context.PreEntityImages["PreImage"]; 

       if (_context.PostEntityImages.Contains("PostImage") && _context.PostEntityImages["PostImage"] != null) 
        _postImage = (Entity)_context.PostEntityImages["PostImage"]; 


       if (_preImage.Attributes.Contains("hm_bidowner")) 
       { 
        EntityReference owner = (EntityReference)_preImage.Attributes["hm_bidowner"]; 
        pre_bidownerid = owner.Id; 
        _target.Attributes["hm_previousbidowner"] = new EntityReference("systemuser", owner.Id); 
       } 
       if (_target.Attributes.Contains("hm_bidowner")) 
       { 
        EntityReference owner = (EntityReference)_target.Attributes["hm_bidowner"]; 
        tag_bidownerid = owner.Id; 
       } 
       if (_preImage.Attributes.Contains("ownerid")) 
       { 
        EntityReference owner = (EntityReference)_preImage.Attributes["ownerid"]; 
        ownerid = owner.Id; 
       } 

       opportunityid = _target.Id; 

       ActivityParty emailFrom = new ActivityParty { PartyId = new EntityReference("systemuser", _context.UserId) }; 
       List<ActivityParty> emailTo = new List<ActivityParty>(); 

       // alert user 
       if (_preImage.Attributes.Contains("ownerid")) 
       { 
        emailTo.Add(new ActivityParty { PartyId = new EntityReference("systemuser", ownerid) }); 
       } 
       if (_preImage.Attributes.Contains("hm_bidowner")) 
       { 
        emailTo.Add(new ActivityParty { PartyId = new EntityReference("systemuser", pre_bidownerid) }); 
       } 
       if (_target.Attributes.Contains("hm_bidowner")) 
       { 
        //emailTo.Add(new ActivityParty { PartyId = ((EntityReference)_target["hm_bidowner"]) }); 
        emailTo.Add(new ActivityParty { PartyId = new EntityReference("systemuser", tag_bidownerid) }); 
       } 

       Email email = new Email(); 
       email.From = new ActivityParty[] { emailFrom }; ; 
       if (emailTo.Count() > 0) 
        email.To = emailTo; 

       Guid templateId = Guid.Empty; 
       templateId = new Guid("EC361CDE-6C9E-E111-BF90-D8D3855BE525");//ACE17A0C-279B-E111-9E28-080027332B48 

       SendEmailFromTemplateRequest emailUsingTemplateReq = new SendEmailFromTemplateRequest 
       { 
        Target = email, 
        TemplateId = templateId, 
        RegardingId = opportunityid, 
        RegardingType = Opportunity.EntityLogicalName 
       }; 


       SendEmailFromTemplateResponse emailUsingTemplateResp = (SendEmailFromTemplateResponse)_service.Execute(emailUsingTemplateReq); 

      } 
     } 
     catch (Exception ex) 
     { 
      throw new InvalidPluginExecutionException(ex.Message, ex); 
     } 
    } 
    #endregion 

    #region CRM Service 
    private void CreateCRMService() 
    { 
     try 
     { 
      _service = _serviceFactory.CreateOrganizationService(_currentUser); 
     } 
     catch (Exception ex) 
     { 
      throw ex; 
     } 
    } 
    #endregion 

} 

}从代码

Answer 1

SendEmailFromTemplateResponse emailUsingTemplateResp = (SendEmailFromTemplateResponse)_service.Execute(emailUsingTemplateReq); 

_service vlaue仍然空。
这意味着您没有重新初始化该值。

请参阅这些链接

1. Using CRM 2011 Service to Create Record from Code
2. CRM 2011 SecurityNegotiationException trying to access web services
3. Issue with mocking IOrganizationService.Execute in CRM 2011 plugin

Answer 2

弗兰克刚才提到_Service仍然是空。按照这个模板您的Execute方法里面：

public void Execute(IServiceProvider serviceProvider){ 

// Obtain the execution context from the service provider. 
Microsoft.Xrm.Sdk.IPluginExecutionContext context = (Microsoft.Xrm.Sdk.IPluginExecutionContext) 
      serviceProvider.GetService(typeof(Microsoft.Xrm.Sdk.IPluginExecutionContext)); 

// Obtain the organization service reference. 
IOrganizationServiceFactory serviceFactory = (IOrganizationServiceFactory serviceProvider.GetService(typeof(IOrganizationServiceFactory)); 

IOrganizationService service = serviceFactory.CreateOrganizationService(context.UserId); 

}