Vb.net 按多列分组

我不确定标题是否有误导性，但我不确定如何总结这一点

我在SQL DB中有一个表，其中有一条记录，如下所示：

Dim cdc As New InternalCalibrationDataContext
Dim allTargetvalues = (From i In cdc.int_calibration_records
                       Where i.calibration_no = Request.QueryString(0) And
                       i.calibration_date = Request.QueryString(1)
                       Select i.measure1_target, i.measure2_target, i.measure3_target).ToList()

我想在gridview中显示此项目的测量值，如下所示：

Dim cdc As New InternalCalibrationDataContext
Dim allTargetvalues = (From i In cdc.int_calibration_records
                       Where i.calibration_no = Request.QueryString(0) And
                       i.calibration_date = Request.QueryString(1)
                       Select i.measure1_target, i.measure2_target, i.measure3_target).ToList()

我考虑将目标值选择到列表中（实际值也是如此），如下所示：

Dim cdc As New InternalCalibrationDataContext
Dim allTargetvalues = (From i In cdc.int_calibration_records
                       Where i.calibration_no = Request.QueryString(0) And
                       i.calibration_date = Request.QueryString(1)
                       Select i.measure1_target, i.measure2_target, i.measure3_target).ToList()

---

然后以某种方式将列表连接在一起，尽管我不确定如何连接列表，或者即使这是正确的方法？

好吧，首先让我说，

measure1\u target

，

measure2\u target

等几乎总是表明数据库设计不好。这些可能位于另一个表中，作为与您发布的表的1对多关系的“多”端。因此，请回答您的一个问题：不，这不是正确的方法

在表的结构处于当前状态时，最好的选择可能是：

Dim cdc As New InternalCalibrationDataContext

Dim allTargetValues As New List(Of Whatever)
For Each targetValue In (From i In cdc.int_calibration_records
                         Where i.calibration_no = Request.QueryString(0) AndAlso
                               i.calibration_date = Request.QueryString(1)
                         Select i)

    allTargetValues.Add(New Whatever With {.MeasureNumber = 1,
                                           .Target = targetValue.measure1_target,
                                           .Actual = targetValue.measure1_actual })


    allTargetValues.Add(New Whatever With {.MeasureNumber = 2,
                                           .Target = targetValue.measure2_target,
                                           .Actual = targetValue.measure2_actual })

    allTargetValues.Add(New Whatever With {.MeasureNumber = 3,
                                           .Target = targetValue.measure3_target,
                                           .Actual = targetValue.measure3_actual })

Next

无论什么

类都是这样的：

Public Class Whatever
    Public Property MeasureNumber As Integer
    Public Property Target As Integer
    Public Property Actual As Integer
End Class

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谢谢道格拉斯，很好用。老实说，我自己设计了这个表，我几乎没有设计数据库的经验，我可以帮上忙。您可能希望查看外键，下次您可以将其分成两个表，因为您实际上有两个单独的实体（例如校准和测量）。