题
我有一个LINQ查询,其中我需要专门做左连接。然而,当我尝试提交的查询其误差的拉姆达跳过功能,并说,跳过不能在LINQ查询与加入。
执行这里的查询(跳过变量是一个参数到函数和clientDB是DataContext的):
Dim questionsQuery = From helpQuestion As HelpQuestion In clientDB.HelpQuestions _
Group Join helpCat As HelpCategory In clientDB.HelpCategories _
On helpCat.ROW_ID Equals helpQuestion.CATEGORY_ID Into helpGroup = Group _
From helpCategory In helpGroup.DefaultIfEmpty() _
Where helpQuestion.DISPLAY_DESK _
Order By helpQuestion.ROW_ID Descending _
Select helpQuestion.ROW_ID, helpQuestion.EMAIL, helpQuestion.FIRST_NAME, helpQuestion.LAST_NAME, helpQuestion.QUESTION, helpQuestion.CREATED, helpQuestion.RESPONSE, helpCategory.CATEGORY_NAME
If skip > 0 Then
questionsQuery = questionsQuery.Skip(skip)
End If
解决方案
我结束了只使用questionsQuery.ToList转换这对列表()。不是最好的解决方案,因为ToList函数返回整个结果设置为在内存中的列表,但它的工作。
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