我创建了一个EF 4 & C#来获取一些数据。我正在使用 Linq。它如下:
public List<object> GenerateCallTrackingReport(int startRowIndex, int maximumRows, int createdByID)
{
var query = from c in this.ObjectContext.CallLogs
select new
{
CallLogID = c.CallLogID,
DomainName = c.CallDomain.FullName,
CreatedByID = c.CreatedByID,
CreatedBy = c.CreatedByUser.FirstName + " " + c.CreatedByUser.LastAccessIPN,
CalledOn = c.CallDate,
IssueResolutionTime = c.IssueResolutionTime,
CallType = c.CallType.FullName,
CallDescription = c.CallDescription,
CustomerName = (c.CustomerID > 0 ? c.Customer.FirstName + " " + c.Customer.LastAccessIPN : c.TempCaller.FirstName + " " + c.TempCaller.LastName),
CustomerEmail = (c.CustomerID > 0 ? c.Customer.Email : string.Empty),
CustomerResponse = c.Response.FullName,
IsPending = c.IsPending,
NeedFurtherContact = c.NeedFurtherContact
};
if (createdByID > 0)
query = query.Where(c => c.CreatedByID == createdByID);
if (maximumRows > 0)
query = query.Skip(startRowIndex).Take(maximumRows);
return query.ToList<object>();
}
这导致以下错误:
Unable to cast the type 'System.Int64' to type 'System.Object'. LINQ to Entities only supports casting Entity Data Model primitive types.
任何想法我得到这个错误?
谢谢