LINQ Join Error

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john - 27 Feb 2008 01:20 GMT

I get the following error on this Join Statement, but I thought the idea of
a LINQ Join is bring together different Data Context, the Intellisene shows
me both tables as a Result; any help is welcome.

Error message: The query contains references to items defined on a different
data context

Dim yr AS Date = Me.DDLfilterDate.SelectedItem.Text

Dim dbTime As New DataTimeRecordDataContext
Dim dbSoProj As New DataSolProjectsDataContext

Dim time = From t In dbTime.tblTimeRecords _
Join p In dbSoProj.PJPROJs On _
t.ProjectID Equals Trim(p.project) _
Where t.PeriodID = Me.DDLfilterDate.SelectedValue _
And t.DayDate.Year = yr.Year _
And t.Approved = True _
And t.Processed = False _
Select t.EmployeeID, t.ProjectID, t.TimeValue, t.DayDate, _
t.PeriodID, t.Task, t.Memo, p.gl_subacct

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Steven Cheng - 27 Feb 2008 10:21 GMT

Hi John,

As for executing Join operation in LINQ TO SQL condition, it has some
restriction on the data context of the two table objects of the join. They
should belong to the same datacontext, and that's what the error message
indicate. So far for this error, here are some web threads I've found
according to the error you meet, you may have a look to see whether it
helps some:

http://www.manning-sandbox.com/thread.jspa?threadID=23025&tstart=-1

Is it possible that you put the two tables into the same DataContext (or
they're physically in two different database)?

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead

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--------------------

>From: "john" <none@none.com>
>Subject: LINQ Join Error
[quoted text clipped - 21 lines]
>Select t.EmployeeID, t.ProjectID, t.TimeValue, t.DayDate, _
>t.PeriodID, t.Task, t.Memo, p.gl_subacct

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LINQ Join Error

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