窥视，
我是Silverlight的重生处女，所以请耐心等待我。我有两个单独的DomainServices，指向两个不同的SQL数据库服务器。在这些域服务中，我在每个域服务中设置了一些IQueryable。
我需要从单独的DomainServices合并两个IQueryable。我相信这必须是可行的。
以下是两个域名服务。
我想将GetCustomCallLogs（来自HEATLiveDomainService）与GetTblCallsLogged（来自HeatDomainService）合并。 GetCustomCallLogs中的键是CallID，GetTblCallsLogged中的键是RecID。
如果我可以理解，我需要创建一个新类型来考虑两个连接表中的任何字段。
希望香港专业教育学院解释我的情景，我不会愚蠢。
提前致谢
public class HEATLIVEDomainService : LinqToEntitiesDomainService<HeatIT9_LiveEntities>
{
// TODO:
// Consider constraining the results of your query method. If you need additional input you can
// add parameters to this method or create additional query methods with different names.
// To support paging you will need to add ordering to the 'Assignees' query.
public IQueryable<Assignee> GetAssignees()
{
return this.ObjectContext.Assignees;
}
// TODO:
// Consider constraining the results of your query method. If you need additional input you can
// add parameters to this method or create additional query methods with different names.
// To support paging you will need to add ordering to the 'CallLogs' query.
public IQueryable<CallLog> GetCallLogs()
{
// return this.ObjectContext.CallLogs.Where(c => DateTime.Parse(c.ClosedDate).Year == 2012 && c.CallStatus == "Closed" && c.ClosedBy.Length > 0);
return this.ObjectContext.CallLogs.Where(c => c.CallStatus == "Closed" && c.ClosedDate.Substring(0, 4).Equals("2013"));
}
public IQueryable<CallLog> GetCallLogsLastThisYear()
{
return this.ObjectContext.CallLogs.Where(c => c.CallStatus == "Closed" && (c.ClosedDate.Substring(0, 4).Equals("2012") || c.ClosedDate.Substring(0, 4).Equals("2013")));
}
public IQueryable<CustomCallLog> GetCustomCallLogs(string year)
{
var result = from i in this.ObjectContext.CallLogs
join p in this.ObjectContext.Assignees on i.ClosedBy equals p.LoginID
where i.CallStatus == "Closed" && i.ClosedDate.Substring(0, 4) == year
select new CustomCallLog
{
Score =
CallLog = i.CallID,
Name = p.Assignee1,
Yr = year,
Mth = i.ClosedDate.Substring(5, 2),
GroupName = p.GroupName
};
return result;
}
public IQueryable<CustomClosedJobs> GetCustomClosedJobs()
{
var result = from i in this.ObjectContext.CallLogs
where i.CallStatus == "Closed" && i.ClosedDate.Substring(0, 4) =="2012"
group i by i.ClosedDate.Substring(5,2) into y
select new CustomClosedJobs
{
Type = "heat",
ClosedCalls = y.Count(),
Mth =y.Key
};
return result;
}
// TODO:
// Consider constraining the results of your query method. If you need additional input you can
// add parameters to this method or create additional query methods with different names.
// To support paging you will need to add ordering to the 'Subsets' query.
public IQueryable<Subset> GetSubsets()
{
return this.ObjectContext.Subsets;
}
}
public class HEATDomainService : LinqToEntitiesDomainService<FEEDBACKPRDEntities1>
{
// TODO:
// Consider constraining the results of your query method. If you need additional input you can
// add parameters to this method or create additional query methods with different names.
// To support paging you will need to add ordering to the 'qryStoringLogs' query.
public IQueryable<qryStoringLog> GetQryStoringLogs()
{
return this.ObjectContext.qryStoringLogs.OrderBy(e => e.monthno);
}
public IQueryable<tblStoringLog> GetTop100Logs()
{
return this.ObjectContext.tblStoringLogs.OrderByDescending(e => e.responsetime).Take(100);
}
public IQueryable<tblStoringLog> GetLogCount(DateTime s, DateTime e)
{
return this.ObjectContext.tblStoringLogs.Where(x => x.responsetime >= s && x.responsetime <= e);
}
public IQueryable<qryStoringLog> GetLogs(int year, int mth)
{
return this.ObjectContext.qryStoringLogs.Where(e => e.Month.Equals(mth) && e.yr.Equals(year));
}
public IQueryable<qryStoringLog> GetLogsForYear(int year)
{
return this.ObjectContext.qryStoringLogs.Where(e => e.yr.Equals(year)).OrderBy(e => e.monthno);
}
public DateTime GetFirstDate()
{
return (DateTime)this.ObjectContext.tblStoringLogs.OrderBy(e => e.responsetime).First().responsetime;
}
public DateTime GetLastDate()
{
return (DateTime)this.ObjectContext.tblStoringLogs.OrderByDescending(e => e.responsetime).First().responsetime;
}
public IQueryable<tblCallLogged> GetTblCallLoggeds()
{
return this.ObjectContext.tblCallLoggeds;
}
public IQueryable<tblStoringLog> GetTblStoringLogs()
{
return this.ObjectContext.tblStoringLogs;
}
[Query(IsComposable = false)]
public IQueryable<qryStoringLog> GetTblStoringLogsStatus(int statusid)
{
return this.ObjectContext.qryStoringLogs.Where(e => e.statusid == statusid);
}
public IQueryable<stResponsesLife_Result> LifeTimeResponses()
{
return this.ObjectContext.stResponsesLife().AsQueryable();
}
public IEnumerable<CustomLifetime> GetCustomLifeTime()
{
var result = from i in this.ObjectContext.stResponsesLife().ToList()
select new CustomLifetime
{
Dates = i.Dates,
Vals = (int)i.Vals
};
return result;
}
public int GetAllResponses()
{
return this.ObjectContext.qryStoringLogs.Count();
}
}
注意事项： 无法链接服务器，因此在源（SQL Server）上执行此操作是不可能的。 无法创建SP并使用OpenQuery（我可以，但我想学会正确地做），因为我确定这不是正确的方法。
答案 0 :(得分：0)
您可能需要第三种类型来包装从每个服务返回的两种不同类型，但这取决于您希望如何使用它。
ItemsControl不关心集合中的类型（Listbox，combobox等），但GridView类型控件可能很挑剔。
使用linq，两个列表都可以简单地合并。像下面这样的东西可以做到这一点：
collection1.Select(o => (object)o).Concat(collection2.Select(o => (object)o));
选择和转换是为了通过查询创建适当的通用集合。
可以调整此选项以将转换合并到您的包装类型中。 ie而不是强制转换为Object，只需返回包装类的新实例。
如果合适，您甚至可以使用联盟。
全部放在一起：
collection1.Select(o => new MyWrapperType(o))
.Union(collection2.Select(o => new MyWrapperType(o)));