How to use multiple order by in LINQ?

How to use multiple order by in LINQ?

Always make use of ThenBy() after OrderBy() because OrderBy() returns an IOrderedEnumerable which then exposes the methods ThenBy() and ThenByDescending() . This means that we can OrderBy on multiple fields by chaining OrderBy() and ThenBy() together.

How do I sort in Linq?

In LINQ, sorting operators are used to rearrange the given sequence in ascending or descending order based on one or more attributes….There are 5 different types of sorting operators are available in LINQ:

1. OrderBy.
2. OrderByDescending.
3. ThenBy.
4. ThenByDescending.
5. Reverse.

How to order by multiple columns using lambda and LINQ in c#?

It returns an object with two values. Similar, but different to sorting by a combined column, as follows. I’m pretty sure that . OrderBy( m => new { m.

How to do order by descending in LINQ?

OrderByDescending Operator If you want to rearrange or sort the elements of the given sequence or collection in descending order in query syntax, then use descending keyword as shown in below example. And in method syntax, use OrderByDescending () method to sort the elements of the given sequence or collection.

How do you use ThenBy in Linq?

Here is an example of ThenBy() usage: List strings = new List { “first”, “then”, “and then”, “finally” }; // Order by the last character, then by the first character // Will contain { “and then”, “then”, “first”, “finally” } IEnumerable result = strings. OrderBy(str => str. Last()).

How do I sort multiple columns in C#?

Sort a list of objects by multiple fields in C#

1. Using LINQ. To create a sorted copy of the list, we can use LINQ’s OrderBy() method. To compare objects against subsequent fields, call the ThenBy() method (or ThenByDescending ).
2. Using List. Sort method ( System. Collections.

What is descending order and ascending order?

In general terms, Ascending means smallest to largest, 0 to 9, and/or A to Z and Descending means largest to smallest, 9 to 0, and/or Z to A. Ascending order means the smallest or first or earliest in the order will appear at the top of the list: For numbers or amounts, the sort is smallest to largest.

What is OrderBy in Linq?

LINQ OrderBy operator comes first in LINQ Sorting Operators. OrderBy operator sort the sequence (collection) based on particular property in ascending order. We can use OrderBy operator both in Query Syntax and Method Syntax.

What is group join in Linq?

In simple words, we can say that Linq Group Join is used to group the result sets based on a common key. So, the Group Join is basically used to produces hierarchical data structures. Each item from the first data source is paired with a set of correlated items from the second data source.

How do you use select many?

Select- Many is used when there are multiple from clauses in a query expression: each element in the original sequence is used to generate a new sequence. Some SelectMany may not be necessary. Below 2 queries give the same result.

How do you do multiple orders in SQL?

After the ORDER BY keyword, add the name of the column by which you’d like to sort records first (in our example, salary). Then, after a comma, add the second column (in our example, last_name ). You can modify the sorting order (ascending or descending) separately for each column.

How to order data in a LINQ query?

By using .Orderby (x=>x.Columnname) in the LINQ query we can easily order data of the source collection. So most of new developer make use of the same function two time .Orderby (x=>x.Columnname).Orderby (x=>x.Columnname) and thinks that will do the ordering on the multiple columns.

How to orderby on multiple fields in Python?

This means that we can OrderBy on multiple fields by chaining OrderBy () and ThenBy () together. If you don’t want to go for Lambda expression, you can easily achieve multiple ordering: As you can see, in the above statement, after order by, you can add multiple columns and do the ordering on the multiple columns.

How do you sort a list by order by in SQL?

Infact, you can use any number of order by in a single statement. Below query sort the list in ascending order of FirstName followed by descending order of LastName followed by ascending order of age. var filteredCrics = crics.OrderBy (fn => fn.FirstName).ThenByDescending (ln => ln.

What does LINQ() return in SQL?

It does return something that can be used to sort. It returns an object with two values. Similar, but different to sorting by a combined column, as follows. use the following line on your DataContext to log the SQL activity on the DataContext to the console – then you can see exactly what your linq statements are requesting from the database: