Question

如何针对CRM 2011编译LINQ查询？

我使用Microsoft.Xrm.Client.dll连接到CRM 2011，并使用从app.config文件中的连接字符串生成的Microsoft.Xrm.Client.CrmOrganizationServiceContext _SvcContext。我有以下LINQ查询，它很有用：

var vdiConfigDataSet = 
   (from SvrToPubProfSet in _SvcContext.vdi_publicationprofile_vdi_serverSet
    join PubProfSet in _SvcContext.vdi_publicationprofileSet
    on SvrToPubProfSet.vdi_publicationprofileid equals PubProfSet.Id
    join SvrSet in _SvcContext.vdi_serverSet
    on SvrToPubProfSet.vdi_serverid equals SvrSet.Id
    where SvrSet.vdi_address == System.Environment.MachineName // This will ignore case

    select new
      {
        // Data from Server record
        RootPath = SvrSet.vdi_rootpath, // This is the same for all Publication Profiles
        SvrAddr = SvrSet.vdi_address,

        // Data from N:N relationship record(s) vdi_publicationprofile_vdi_serverSet
        SvrId = SvrToPubProfSet.vdi_serverid,
        PubProfId = SvrToPubProfSet.vdi_publicationprofileid,

        // Data from Publication Profile record(s)
        PubProfName = PubProfSet.vdi_name,
        RelativePath = PubProfSet.vdi_relativepath,
        ReportRelativePath = PubProfSet.vdi_reportrelativepath,
        ReportFilenameSeed = PubProfSet.vdi_reportfilenameseed,
        SubSystemType = PubProfSet.vdi_subsystemtype,
        ModifiedOn = PubProfSet.ModifiedOn
      }).ToList();

这是一个非常大的查询，可以反复执行。我想把它编译下来。我尝试过以下方法：

public static readonly Func<DataContext, Object> s_compiledQuery =
  CompiledQuery.Compile<DataContext, Object>
  (ctx  =>
  (from SvrToPubProfSet in ctx.GetTable<vdi_publicationprofile_vdi_server>()
   join PubProfSet in ctx.GetTable<vdi_publicationprofile>()
   on SvrToPubProfSet.vdi_publicationprofileid equals PubProfSet.Id
   join SvrSet in ctx.GetTable<vdi_server>()
   on SvrToPubProfSet.vdi_serverid equals SvrSet.Id
   where SvrSet.vdi_address == System.Environment.MachineName // This will ignore case

   select new
   {
     // Data from Server record
     RootPath = SvrSet.vdi_rootpath, // This is the same for all Publication Profiles
     SvrAddr = SvrSet.vdi_address,

     // Data from N:N relationship record(s) vdi_publicationprofile_vdi_serverSet
     SvrId = SvrToPubProfSet.vdi_serverid,
     PubProfId = SvrToPubProfSet.vdi_publicationprofileid,

     // Data from Publication Profile record(s)
     PubProfName = PubProfSet.vdi_name,
     RelativePath = PubProfSet.vdi_relativepath,
     ReportRelativePath = PubProfSet.vdi_reportrelativepath,
     ReportFilenameSeed = PubProfSet.vdi_reportfilenameseed,
     SubSystemType = PubProfSet.vdi_subsystemtype,
     ModifiedOn = PubProfSet.ModifiedOn
   }).ToList());
...

var vdiConfigDataSet2 = s_compiledQuery(_SvcContext); //ERROR _SvcContext is not DataContext type

但是我需要一个DataContext类型的对象，我不知道如何从Microsoft.Xrm.Client.CrmOrganizationServiceContext类型对象中获取它。

任何人都有任何想法如何在为CRM 2011编译LINQ查询时获得DataContext或更优雅的解决方案？

Answer 1

CRM服务上下文代理不是基于实体框架的数据上下文，而是“在幕后”是ODATA / SOAP。您无法编译CRM查询，因为CompileQuery类泛型arg必须从ObjectContext继承。

您可能想要研究的一件事是使用此参数： /codeCustomization:"Microsoft.Xrm.Client.CodeGeneration.CodeCustomization,Microsoft.Xrm.Client.CodeGeneration“ 使用SDK的代码生成工具（crmsvcutil.exe），这样可以在CRM linq查询中遍历“导航属性”，从而减轻您的连接。

如何针对CRM 2011编译LINQ查询？

1 个答案: