LINQ排序问题

发布于 2024-10-28 09:37:03 字数 1587 浏览 2 评论 0原文

我有一个 LINQ 查询:

bikersList = (From c In ngBikersDataContext.Reg_Bikers _
              Order By c.L_Name _
              Select New Bikers() With { _
                  .BikerID = c.BikerID, _
                  .F_Name = c.F_Name, _
                  .M_Name = c.M_Name, _
                  .L_Name = c.L_Name, _
                  .MyID = c.MyID, _
                  .Site = c.Site.GetValueOrDefault, _
                  .bk_Building = c.bk_Building, _
                  .bk_City = c.bk_City, _
                  .bk_Zip = c.bk_Zip.GetValueOrDefault, _
                  .bk_Phone = c.bk_phone, _
                  .email = c.email, _
                  .DeptZone = c.DeptZone, _
                  .QuartID = c.QuartID.GetValueOrDefault, _
                  .BikerDays = c.BikerDays.GetValueOrDefault, _
                  .BikerMiles = c.BikerMiles.GetValueOrDefault, _
                  .BikerTime = c.BikerTime.GetValueOrDefault, _
                  .BKLockID = c.BKLockID.GetValueOrDefault, _
                  .bk_Start_DT = c.bk_Start_DT, _
                  .bk_End_DT = c.bk_End_DT, _
                  .bk_Quarter = c.bk_Quarter.GetValueOrDefault, _
                  .bk_Year = c.bk_Year.GetValueOrDefault, _
                  .bk_Comments = c.bk_Comments, _
                  .IsActive = c.IsActive.GetValueOrDefault _
              }).ToList()

这非常有效,并且可以对 L_Name 进行排序。但我试图允许用户自己对 gridview 进行排序,因此我将 SortExpression 作为字符串传递。但我不知道如何将 SortExpression 合并到 LINQ 查询中。

我尝试了 Order By c。 & SortExpression 但这不起作用。

I have a LINQ Query:

bikersList = (From c In ngBikersDataContext.Reg_Bikers _
              Order By c.L_Name _
              Select New Bikers() With { _
                  .BikerID = c.BikerID, _
                  .F_Name = c.F_Name, _
                  .M_Name = c.M_Name, _
                  .L_Name = c.L_Name, _
                  .MyID = c.MyID, _
                  .Site = c.Site.GetValueOrDefault, _
                  .bk_Building = c.bk_Building, _
                  .bk_City = c.bk_City, _
                  .bk_Zip = c.bk_Zip.GetValueOrDefault, _
                  .bk_Phone = c.bk_phone, _
                  .email = c.email, _
                  .DeptZone = c.DeptZone, _
                  .QuartID = c.QuartID.GetValueOrDefault, _
                  .BikerDays = c.BikerDays.GetValueOrDefault, _
                  .BikerMiles = c.BikerMiles.GetValueOrDefault, _
                  .BikerTime = c.BikerTime.GetValueOrDefault, _
                  .BKLockID = c.BKLockID.GetValueOrDefault, _
                  .bk_Start_DT = c.bk_Start_DT, _
                  .bk_End_DT = c.bk_End_DT, _
                  .bk_Quarter = c.bk_Quarter.GetValueOrDefault, _
                  .bk_Year = c.bk_Year.GetValueOrDefault, _
                  .bk_Comments = c.bk_Comments, _
                  .IsActive = c.IsActive.GetValueOrDefault _
              }).ToList()

This works great and sorts on L_Name. But I am trying to allow the user to sort the gridview themselves so I am passing in the SortExpression as a string. But I don't know how to incorperate the SortExpression into the LINQ Query.

I tried Order By c. & SortExpression but that did not work.

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山田美奈子 2024-11-04 09:37:03

您可以通过使用 System.Linq.Expressions.Expression

这里是一个解释相同内容的示例

you can do this by dynamically constructing the linq expression using System.Linq.Expressions.Expression.

Here is an example which explains the same

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