System.Linq.Dynamic不支持OrderByDescending("someColumn")? [英] System.Linq.Dynamic does not support OrderByDescending("someColumn")?

问题描述

好吧，所以在我们的项目中，我使用的是System.Linq.Dynamic库，但是我只是注意到我无法执行以下操作:

Ok so in our project I'm using System.Linq.Dynamic library but I just noticed that I cannot do the folowing:

myDataSource.OrderByDescending("someColumnName")

myDataSource.OrderByDescending("someColumnName")

因为出现以下错误:

重载解析失败，因为无法使用这些参数调用可访问的OrderByDescending ...

Overload resolution failed because no accessable OrderByDescending can be called with these arguments...

似乎库仅支持OrderBy("someColumnName").有这个原因吗?如果我想按降序对记录重新排序，该如何避免这个问题?我是否必须使用Reverse()例如OrderBy("someColumnName").Reverse()?好像是黑客...

It seems that the Library only support OrderBy("someColumnName"). Is there a reason for this and how would I bypass this issue if I want to reorder the records in descending order? Do I have to user Reverse() for example OrderBy("someColumnName").Reverse()? Seems like a hack...

任何建议将不胜感激...

Any advice would be greatly appreciated...

推荐答案

假定您使用的是Microsoft示例库中的DynamicQuery Helper文件(位于名称空间System.Linq.Dynamic中)，然后在阅读源代码后使用它看起来您需要按如下方式指定所需的顺序:

Assuming that you are using the DynamicQuery Helper files from the Microsoft sample library (Which are in the namespace System.Linq.Dynamic) then after reading the source code it looks like you need to specify the ordering you want as follows:

myDataSource.OrderBy("someColumnName descending")

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