How can I iterate over a collection and change values with LINQ extension methods?

How can I iterate over a collection and change values with LINQ - Actually, this is possible using only the built-in LINQ extension methods without ToList . I believe that this will perform very similarly to a regular

Update all objects in a collection using LINQ - While you can use a ForEach extension method, if you want to use just the framework you collection.Select(c => {c.PropertyToSet = value; return c;}). ToList();.

c# update all values in a integer list using linq - MSDN - How to update a list of integer values using linq. IList<T> to List<T> you could use the ForEach extension method to iterate through it: is not legal to modify the collection while you are iterating over it (querying it) with LINQ.

c# - for vs. foreach vs. LINQ - Iterating through a collection and doing something with the and it's not obvious to find the ElementAt LINQ extension method. .. This allows for the platform to evolve underneath you without you having to change your code.

LINQ: Select an object, but change some properties without creating - You can do it via the LINQ extension methods pretty easily, You can set any number of properties on that object without creating a new

LINQ | Jon Skeet's coding blog - source[2] = 100; // This change *won't* be seen iterator.MoveNext(); First, let's use a collection which performs the reversing for us automatically: a stack. .. to use iterator blocks to return some values to anyone iterating over the result .. They're all extension methods, but ThenBy/ThenByDescending are

Safe foreach loops with C# - How to modify collections in foreach loop? When calling ToList() LINQ-method on collection we get copy of items collection and it is not

Using custom grouping operators in LINQ - In LINQ, we can group data using the \ GroupBy , which is an extension method for the IEnumerable<T> type. . We're using the IEnumerator<T> to iterate over the source elements, because this allows us to call the MoveNext once before we start . [1] Can I use LINQ to retrieve only “on change” values?

Replace Foreach with LINQ - We then iterate over our list of fields and create (Project) new from these values and then pass this list directly into the Controls collection using AddRange. You have to use the extension methods and Lambda Functions

C#/.NET Little Wonders: The ToLookup() LINQ Extension Method - LINQ has added so many wonderful extension methods to our . 6: new Product { Id = 4, Category = "Pets", Value = 2.1 }, means basically any enumeration of data (whether collection or iterator) will do. We'd want to store this in a collection for further use, but what if the underlying data changes before

c# linq select from list of objects

Linq select object from list depending on objects attribute - First, Single throws an exception if there is more than one element satisfying the criteria. Second, your criteria should only check if the Correct

Query a collection of objects (LINQ in C#) - Learn how query collections using LINQ in C#. This example shows how to perform a simple query over a list of Student objects.

LINQ & C# - I have a list of this object and I'm trying to get just the matching object out The below query // will return an IEnumerable<AppIcon> var result

c# - LINQ query that filters elements from a list of object - You can simply combine the conditions inside the FirstOrDefault() like PersonResultList = PersonResultList .Where(pr => PersonList .

How to select certain Elements in a list using LINQ-methods? - Basically I want to add certain objects to a list, where the selected script has a Most of the Linq stuff will work on the generic version only.

[Solved] Using LINQ to select from a List within a List - If you want to "flatten" enumerable of enumerables, the SelectMany extension method will do the trick. Hide Copy Code. var orders = new

Query a list of objects by its property : Object Query « LINQ « C# / C - Query a list of objects by its property : Object Query « LINQ « C# / C Sharp.

LINQ select items from a list within a list | C# Online Compiler - LINQ select items from a list within a list | Test your C# code online with .NET Fiddle code editor.

LINQ with C# Objects, Collections and Arrays - Linq to Objects: This provides the ability to query IEnumerable<T>-based information sources which include arrays, collections, list of objects. Linq to XML: This

Sample LINQ Queries - IList<Student> studentList = new List<Student>() { new Student() { StudentID = 1, StudentName = "John", Age = 18, StandardID = 1 } Example: LINQ Query returns Collection of Anonymous Objects Example: LINQ GroupBy Query - C#.

how to use for loop in linq query

Loop through var from LINQ query? - So you can Iterate through it using a foreach . Only when you start iterating over it (using foreach or ToList() , then the database call is done.

c# - Write nested loops as linq query - You just need a bit more LINQ to get a collection of (train, wagon) pairs, so that ToLookup() can work: var wagonTrains = (from train in trains

Linq Query for for loop - MSDN - Please suggest me linq query for below for loop. I need to marked The following code snippet should do the same as your code using linq.

LINQ query operators: lose that foreach already! · Los Techies - Note the temporary list creation, just to return an array. With LINQ query operators , I can use the Select method to do the same transformation in

foreach loop for LINQ query - Hi, I am trying to loop round an array and query the database based on when you start using linq you often use the wrong order trying to do

Replacing foreach loop with LINQ - For replacing foreach loop, for a non-query operation, just for performing an operation on each element in the collection, we can use the ForEach method, like

[Solved] How to convert for loop into Linq Query. - I'm sure you're pretty close Hide Copy Code. var res = from pro in m_Product. Products where pro.ID == nodeDependentProduct join frm in

Loop can be converted into LINQ-expression - For example, if we had c += numbers[i] in the loop above, ReSharper would This will instruct the runtime to use PLINQ (Parallel LINQ), which can speed up

[C# Feature] Convenient combination of foreach and LINQ · Issue - Currently: foreach (var item in from xItem in new[] {"One", "Two", I never use LINQ language queries and instead my coding guidelines is

LINQ Query Syntax - There are two basic ways to write a LINQ query to IEnumerable collection or IQueryable data It is similar to a foreach loop: foreach(Student s in studentList) .

loop through collection c#

Iterate through collections in C# - An iterator can be used to step through collections such as lists and arrays. An iterator method or get accessor performs a custom iteration over

How to loop through a collection that supports IEnumerable - A regular for each will do: foreach (var item in collection) { // do your stuff }.

c# - Iterating through a collection of objects - You can do the same with just a foreach loop instead of reading the enumerator. You can use the String.Compare method to do a case

C# Collection: Iterating Through a Collection - When studying arrays, we saw that you could use a for loop to visit each member In both cases, you can list the members of an array or a collection through a

C# Iterators - A for loop iterates through a C# collection by accessing elements through indices. The loop basically increases an integer value which is then used to request an object from the collection. This means that a collection must support access by indices to support a for-loop iteration.

Looping through a LIST with for and foreach in C# - Looping through a LIST with for and foreach in C# Collections.Generic Add(3 );; foreach (int item in list) // Loop through List with foreach; {; Console.

C# Collections - Iterators - An iterator is a method, operator or get accessor that performs a custom iteration over a collection class or array. Using an iterator block is a way of creating an

C# For Loops and Iterators Uncovered - Iterating through a collection with a for loop implicitly implies that the collection has all of its elements sequentially laid out in memory. While it is

Performance of the Loops … in C# – Ziad SALLOUM – Medium - As strange as one might think, the topic of the performance of loops in C# is C# provides several ways to loop over an array or a collection:.

Safe foreach loops with C# - How to modify collections in foreach loop? also shows how to write safe loops and how to modify collections that foreach is stepping through.