小编Chr*_*ner的帖子

我很清楚微软的支持基础文章说它不支持自动化办公产品UI.似乎Windows Server 2008 x64和Excel 2007强制执行给定的语句.

我在NT服务(本地系统帐户)OnStart方法中运行以下代码.当它在控制台应用程序中运行相同的代码时,它所做的只是Excel自动化.

提供的代码有两部分.第一部分启动Excel,创建一个新的工作簿并将其保存到给定的文件名.第二部分启动Excel的新实例并打开给定文件.打开操作以此异常结束:

服务无法启动.System.Runtime.InteropServices.COMException(0x800A03EC):Microsoft Office Excel无法访问文件'c:\ temp\test.xls'.有几个可能的原因:

•文件名或路径不存在.•该文件正由另一个程序使用.？您尝试保存的工作簿与当前打开的工作簿具有相同的名称.

为什么自动excel能够启动并将文件写入磁盘但是当它被要求"只是"打开现有文件时失败？

System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US");
// launch excel and create/save a new work book
Microsoft.Office.Interop.Excel.ApplicationClass excel = new       Microsoft.Office.Interop.Excel.ApplicationClass();
excel.UserLibraryPath, excel.Interactive));
//            
string filename = "c:\\temp\\test.xls";
if(System.IO.File.Exists(filename)) System.IO.File.Delete(filename);
//
excel.Workbooks.Add(System.Reflection.Missing.Value);
excel.Save(filename);
excel.Quit();
excel = null;
// lauch new instance of excel and open saved file
excel = new Microsoft.Office.Interop.Excel.ApplicationClass();
try
{
    Microsoft.Office.Interop.Excel.Workbook book = excel.Workbooks.Open(filename,
                System.Reflection.Missing.Value,
                System.Reflection.Missing.Value,
                System.Reflection.Missing.Value,
                System.Reflection.Missing.Value,
                System.Reflection.Missing.Value,
                true,
                System.Reflection.Missing.Value,
                System.Reflection.Missing.Value,
                false,
                false,
                System.Reflection.Missing.Value, …

我正在使用crmsvcutil生成早期绑定类型.在crm 4.0天中,只需点击entity.ChildEntities属性即可加载相关的entites.

  //Winvs.Next.Entities.CrmDataContext dc = new Entities.CrmDataContext(new Microsoft.Xrm.Sdk.Client.OrganizationServiceContext(
  var cred = new System.ServiceModel.Description.ClientCredentials();
  cred.Windows.ClientCredential = System.Net.CredentialCache.DefaultNetworkCredentials;
  //      
  using (var organizationServiceProxy = new Microsoft.Xrm.Sdk.Client.OrganizationServiceProxy(new Uri(System.Configuration.ConfigurationManager.ConnectionStrings["CrmConnection"].ConnectionString), null, cred, null))
  using (Winvs.Next.Entities.CrmDataContext dc = new Entities.CrmDataContext(organizationServiceProxy))
  {
    // This statement is required to enable early-bound type support.
    organizationServiceProxy.ServiceConfiguration.CurrentServiceEndpoint.Behaviors.Add(new Microsoft.Xrm.Sdk.Client.ProxyTypesBehavior());
    //
    foreach (var a in dc.AccountSet)
    {
      foreach (var c in a.contact_customer_accounts)
      {
        c.FullName.ToString();
      }
    }       
  }

当我使用最新的CRM 2011 SDK版本执行此操作而不是加载已实现的实体时,我得到一个NullReferenceException,它没有提供有关该问题的进一步信息.

foreach (var c in a.contact_customer_accounts)

我想念什么？如何使用CRM2011 Linq加载相关实体？