How can I use LINQ orderby descending in an query ?

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It could be a simple question but with my code here i can't use orderby desc and that's my problem

i will be glad for an explanation which is always helping me

look at what I have tried :

What I have tried:

public static void GetDruckerNameAndAnzahl (List<Queue> input)
       {
           var model =
           from print in input
           where print.LastStatus == "Printed"
           group print by print.PrinterName into PrintGroupPrinted
           select new
           {
               PrinterName = PrintGroupPrinted.Key,
               TotalCount = PrintGroupPrinted.Count(),

           };

           foreach (var item in model)
           {
               Console.WriteLine($"{item.PrinterName}:{item.TotalCount}");
           }


       }

Posted 6-Sep-19 0:07am

Abdalla Ben Omran

Updated 6-Sep-19 0:35am

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JayantaChatterjee 6-Sep-19 6:29am

On which property do you want to Order by desc in your Object list?

2 solutions

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Maciej Los · Accepted Answer · 2019-09-06T00:31:00

Check this (lambda version):

C#

public static void GetDruckerNameAndAnzahl (List<Queue> input)
       {
           var model = input
           .Where(print=> print.LastStatus == "Printed")
           .GroupBy(print=> print.PrinterName)
           .OrderByDescending(grp=> grp.Count())
           .Select(grp=> new
           {
               PrinterName = grp.Key,
               TotalCount = grp.Count(),

           })
           .ToList();

           foreach (var item in model)
           {
               Console.WriteLine($"{item.PrinterName}:{item.TotalCount}");
           }


       }

For further details, please see: Enumerable.OrderByDescending Method (System.Linq) | Microsoft Docs[^]

Non-lambda version:

C#

var model =
from print in input
where print.LastStatus == "Printed"
group print by print.PrinterName into PrintGroupPrinted
orderby PrintGroupPrinted.Count() descending
select new {...}

JayantaChatterjee · Accepted Answer · 2019-09-06T00:35:00

In LINQ:-

C#

public static void GetDruckerNameAndAnzahl (List<Queue> input)
       {
           var model =
           from print in input
           where print.LastStatus == "Printed"
           group print by print.PrinterName into PrintGroupPrinted
orderby PrintGroupPrinted.Count() descending
           select new
           {
               PrinterName = PrintGroupPrinted.Key,
               TotalCount = PrintGroupPrinted.Count(),

           };

           foreach (var item in model)
           {
               Console.WriteLine($"{item.PrinterName}:{item.TotalCount}");
           }


       }

How can I use LINQ orderby descending in an query ?

2 solutions

Solution 1

Solution 2

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