Концерн Libbey був заснований 1818 року в американському штаті Массачусетс і майже 200 років виробляє барне та ресторанне скло. Продукція Libbey визнана найбільш професійною та якісною з усіх наявних аналогів. Денна норма виробництва — 4 мільйони виробів, прямо із заводу експортуються в 100 країн світу. Клієнти Libbey — корпорація Coca-Cola, готелі Hilton, Sheraton, Hyatt, Marriott.
Переваги продукції компанії Libbey:
• Спеціальна технологія виробництва та оброблення виробів роблять продукцію Libbey стійкою до утворення відколів, що автоматично збільшує термін її експлуатації.
• Під час падіння виробу розколюються на кілька великих безпечних шматків, які можна швидко та просто прибрати, і водночас не поранитися.
• Наявність виробів з унікальним дизайном і неповторною формою привертає увагу досвідчених клієнтів, які бажають зробити своє заведення оригінальним і впізнаваним.
• Постійна присутність цієї торгової марки на міжнародних заходах HoReCa, а також барних шоу та конкурсах.
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In this video, we are going to discuss Union Linq c# example || union in LINQ query c# || Linq tutorial for beginners
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Lambda expressions can reduce your code, make it more readable and turn you into a more efficient programmer. I'll give you the rundown on what lambda is, how it's built and show you a bunch of useful lambda functions. Lastly I'll show you how to create your own lambda functions.
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Union Linq c# example || union in LINQ query c# || Linq tutorial for beginners
Having a List for an object is a fairly common occurrence in C#. In fact, most data access systems end with having the data in a List. This video will help you see how to sort, filter, and operate on lists easily and powerfully.
You will see examples both in a Console application and in a Windows Forms application. This practical example dives right into the most important parts of Linq to get you up and running in minutes.
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0:00 - Intro
0:43 - demo app walkthrough
3:56 - for each item in the list, do this - foreach loop.
5:24 - sorting the list of items by item property: OrderBy
8:42 - sort the list descending: OrderByDescending
9:29 - sort the list by more than one parameter: ...ThenBy
11:18 - filter the list: Where(bool true)
15:14 - Sum of the countable property of objects in the list
16:20 - combining list methods: Where and Sum
18:29 - using Linq in applications - WinForm app walk-through: (data binding, events)
22:55 - Implementing Linq Це відео автоматично взято із YouTube за назвою товару, можливий неправильний пошук.
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In this video, we are going to discuss how to add order by in Linq query c# || order by in LINQ c# || LINQ
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This is the recording of my C#/.NET course at the computer science school HTL Leonding.
In this week's lecture, we are going to take a close look at LINQ. The first video contains a deep dive into Enumerables, the foundation of LINQ. Це відео автоматично взято із YouTube за назвою товару, можливий неправильний пошук.
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Sometimes you need to perform a LINQ GroupBy using more than a single property. This video will demo how to do this in C#.
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In this video, we are going to learn select operator Linq c# || Linq query for select in c# || Linq tutorials for beginners
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C# LINQ - Part 1: Enumerables - The Foundation of LINQ
Text version of the video
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Let us understand the difference between Select and SelectMany with an example.
In this example, the Select() method returns List of List[string]. To print all the subjects we will have to use 2 nested foreach loops.
IEnumerable[List[string]] result = ().Select(s =] );
foreach (List[string] stringList in result)
{
foreach (string str in stringList)
{
(str);
}
}
SelectMany() on the other hand, flattens queries that return lists of lists into a single list. So in this case to print all the subjects we have to use just one foreach loop.
IEnumerable[string] result = ().SelectMany(s =] );
foreach (string str in result)
{
(str);
} Це відео автоматично взято із YouTube за назвою товару, можливий неправильний пошук.
select operator Linq c# || Linq query for select in c# || Linq tutorials for beginners
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In this video, we will discuss Grouping by multiple keys. In LINQ, an anonymous type is usually used when we want to group by multiple keys.
Example 1: Group employees by Department and then by Gender. The employee groups should be sorted first by Department and then by Gender in ascending order. Also, employees within each group must be sorted in ascending order by Name.
var employeeGroups = ()
.GroupBy(x =] new { , })
.OrderBy(g =] ).ThenBy(g =] )
.Select(g =] new
{
Dept = ,
Gender = ,
Employees = (x =] )
});
Example 2: Rewrite Example 1 using SQL like syntax
var employeeGroups = from employee in ()
group employee by new { , } into eGroup
orderby ascending, ascending
select new
{
Dept = ,
Gender = ,
Employees = (x =] )
}; Це відео автоматично взято із YouTube за назвою товару, можливий неправильний пошук.
Learn about LINQ in this advanced C# course. LINQ provides a set of operators that enable developers to query, project, and filter data in arrays, collections, and other data sources. It can be used to query and manipulate data from databases, XML documents, and .NET objects.
✏️ Course from @GavinLon
💻 Code Part 1:
💻 Code Part 2:
💻 Code Part 3:
💻 Code Part 4:
🔗 Full Advanced Course Playlist Link:
⭐️ Contents ⭐️
⌨️ (0:00:00) Part 1 - Introduction
⌨️ (0:07:37) Create a .NET Core Console Application - Understand how LINQ Works
⌨️ (0:14:40) Understanding Extension Methods
⌨️ (0:22:43) Undering Lambda Expressions
⌨️ (0:31:44) Compare LINQ Query Syntax with TSQL Syntax
⌨️ (0:38:33) Part 2 - LINQ Queries
⌨️ (0:42:07) Create .NET Console Application
⌨️ (0:51:10) Method Syntax vs Query Syntax
⌨️ (0:54:25) Understanding Deferred Execution vs Immediate Execution
⌨️ (1:01:33) Using the Join Operator to Perform Inner Join Queries
⌨️ (1:08:59) Perform Left Outer Join Query using LINQ - GroupJoin Operator
⌨️ (1:18:12) Part 3 - LINQ Operators
⌨️ (1:34:39) GroupBy and ToLookup LINQ Operators
⌨️ (1:39:02) The All, Any and Contains Qualifier Operators
⌨️ (1:55:30) The Element Operators (FirstOrDefault, Single, SingleOrDefault etc..)
⌨️ (2:05:01) Part 4 - More LINQ Operators
⌨️ (2:21:51) The Aggregate Operators (Aggregate, Average, Count, Sum, Max)
⌨️ (2:28:36) The Generation Operators (DefaultIfEmpty, Empty, Range, Repeat)
⌨️ (2:34:43) The Set Operators (Distinct, Except, Intersect, Union)
⌨️ (2:42:59) The Partitioning Operators (Skip, SkipWhile, Take, TakeWhile)
⌨️ (2:47:02) The Conversion Operators (ToList, ToDictionary, ToArray)
⌨️ (2:52:31) The Let and Into Keywords
⌨️ (3:00:25) The Projection Operators (Select, SelectMany)
⌨️ (3:03:46) Course Summary
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Part 9 Difference between Select and SelectMany in LINQ
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Constructing complex LINQ expressions can be a daunting task at times, and error-prone, too. That is the problem that requires systematic approach and meticulous decomposition of requirements. In this video, you will learn a step-by-step procedure of constructing a LINQ expression which resolves a complex customer's request.
By the end of this demonstration, you will learn how to approach the problem of constructing a complex LINQ query, but also how to notice issues that will cause.
We are ending this video by identifying shortcomings of a complex LINQ expression, and preparing ground to decomposing it into multiple classes and methods, each focused on one part of the original customer's request.
Follow-up video ► Decomposing a Complex LINQ Expression ►
Learn more from video courses:
Beginning Object-oriented Programming with C# ►
Collections and Generics in C# ►
Making Your C# Code More Object-oriented ►
Other courses at Pluralsight ►
Other courses at Udemy ►
Other videos on this channel you may be interested in watching:
Using GitHub Copilot to Write Complex Code | Step-by-step Tutorial ►
Coding with GitHub Copilot - Beginner to Master | VS Code Demo ►
What is Covariance and Contravariance in C# ►
How to Initialize a Clean Core Project with Entity Framework Core and Identity ►
The Null Conundrum: A Guide to Optional Objects in C# ► Це відео автоматично взято із YouTube за назвою товару, можливий неправильний пошук.
This video explains Where Clause/Operator with example using 'Query Syntax' and 'Method Syntax'
To know more about Lambda Expression watch following video :
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In this video, we will discuss
1. What is LINQ
2. Why should we use LINQ and what are the benefits of using LINQ
3. LINQ Architecture
4. LINQ Providers
5. LINQ to SQL Example
What is LINQ
LINQ stands for Language Integrated Query. LINQ enables us to query any type of data store (SQL Server, XML documents, Objects in memory etc).
Why should we use LINQ and what are the benefits of using LINQ
If the .NET application that is being developed
a) Requires data from SQL Server - Then the developer has to understand code and SQL specific to SQL Server Database
b) Requires data from an XML document - Then the developer has to understand XSLT & XPATH queries
c) Need to query objects in memory (List[Customer], List[Order] etc) - Then the developer has to understand how to work with objects in memory
LINQ enables us to work with these different data sources using a similar coding style without having the need to know the syntax specific to the data source. In our upcoming videos we will discuss querying different data sources using LINQ.
Another benefit of using LINQ is that it provides intellisense and compile time error checking.
LINQ Architecture & LINQ Providers
1. LINQ query can be written using any .NET supported programming language
2. LINQ provider is a component between the LINQ query and the actual data source, which converts the LINQ query into a format that the underlying data source can understand. For example LINQ to SQL provider converts a LINQ query to T-SQL that SQL Server database can understand.
If we misspell table or column names in the SQL Query, we will not know about it at compile time. At run time the page crashes and that's when we will know about this error. Also notice that there is no intellisense when typing table and column names. Misspelled column names when reading from the reader will also cause the same problem. With LINQ we will have intellisense and compile time error checking.
With LINQ we get intellisense. If we misspell the table or column names we will get to know about them at compile time. Це відео автоматично взято із YouTube за назвою товару, можливий неправильний пошук.
This is the FIRST video of our LINQ in C#.Net series.
In this video you will learn the below topics with the help of simple code examples:
00:00 – Intro
00:59 – Introduction to LINQ
02:33 – Method based Syntax & Query based Syntax
05:07 – Select Operator
16:22 – Where Operator
To be continued...
If you found this video helpful don’t forget to hit the Like button!
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#LINQ #DotNet
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In our career, we have noticed that many new programmers get confused while coding, even though they are aware of that concept. We help them understand the concept in our office. 🤗
So, we thought why not share these concepts in the same easy to understand way to the whole world.
Let every one who is starting their coding journey get to learn and become a better programmer! 😊
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LINQ Where Operator | LINQ Where Clause | Filtering in LINQ | Restriction in LINQ
This is the SECOND video of our LINQ in C#.Net series.
In this video you will learn the below topics with the help of simple code examples:
(Continued from : )
00:00 – Intro
00:27 – OrderBy Operator
02:27 – ThenBy Operator
08:21 – GroupBy Operator
22:29 – Other Useful Operators
To be continued...
If you found this video helpful don’t forget to hit the Like button!
If you wish to join us for future learning, do Subscribe this channel and hit the Bell icon to get the future video notifications!
#LINQ #DotNet
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We believe in - "Knowledge increases by sharing!!"
Who are we?
We are a bunch of IT professionals who love to teach apart from our regular coding work! 👬👫
Why this Channel?
In our career, we have noticed that many new programmers get confused while coding, even though they are aware of that concept. We help them understand the concept in our office. 🤗
So, we thought why not share these concepts in the same easy to understand way to the whole world.
Let every one who is starting their coding journey get to learn and become a better programmer! 😊
We have taught many people offline, and now trying to make an online presence to help wider audience. 💖
Let's Code!
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In this video, we'll be covering LINQ Query Syntax and Execution: Tips and Tricks. We'll be discussing how to use LINQ Query Syntax to create readable and efficient LINQ Queries, and we'll also cover how to optimize and execute LINQ Queries using various techniques.
If you're a .NET developer and you're looking to learn more about LINQ Query Syntax and Execution, then this video is for you! We'll be covering all the key concepts in a clear and concise manner so that you can start using LINQ in your development projects right away!
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LINQ in C#.Net made easy! - PART 2 | OrderBy | ThenBy | GroupBy | Codelligent
This is the THIRD video of our LINQ in C#.Net series.
In this video you will learn JOINS in LINQ with the help of simple code examples.
00:00 – Intro
00:22 – Joins in LINQ
02:26 – Inner Join
15:23 – Group Join
25:51 – Left Outer Join
If you found this video helpful don’t forget to hit the Like button!
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#LINQ #DotNet
-----------------------------------------------------------------------------------------
We believe in - "Knowledge increases by sharing!!"
Who are we?
We are a bunch of IT professionals who love to teach apart from our regular coding work! 👬👫
Why this Channel?
In our career, we have noticed that many new programmers get confused while coding, even though they are aware of that concept. We help them understand the concept in our office. 🤗
So, we thought why not share these concepts in the same easy to understand way to the whole world.
Let every one who is starting their coding journey get to learn and become a better programmer! 😊
We have taught many people offline, and now trying to make an online presence to help wider audience. 💖
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-----------------------------------------------------------------------------------------
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Text version of the video
Healthy diet is very important both for the body and mind. If you like Aarvi Kitchen recipes, please support by sharing, subscribing and liking our YouTube channel. Hope you can help.
Slides
LINQ Tutorial - All Text Articles & Slides
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The following operators belong to Set operators category
Distinct
Union
Intersect
Except
We discussed Distinct operator in Part 26. In this video we will discuss Union, Intersect and Except operators.
Union combines two collections into one collection while removing the duplicate elements.
Example 1: numbers1 and numbers2 collections are combined into a single collection. Notice that, the duplicate elements are removed.
int[] numbers1 = { 1, 2, 3, 4, 5 };
int[] numbers2 = { 1, 3, 6, 7, 8 };
var result = (numbers2);
foreach (var v in result)
{
(v);
}
When comparing elements, just like Distinct() method, Union(), Intersect() and Except() methods work in a slightly different manner with complex types like Employee, Customer etc.
Example 2 : Notice that in the output the duplicate employee objects are not removed. This is because, the default comparer is being used which will just check for object references being equal and not the individual property values.
List[Employee] list1 = new List[Employee]()
{
new Employee { ID = 101, Name = "Mike"},
new Employee { ID = 102, Name = "Susy"},
new Employee { ID = 103, Name = "Mary"}
};
List[Employee] list2 = new List[Employee]()
{
new Employee { ID = 101, Name = "Mike"},
new Employee { ID = 104, Name = "John"}
};
var result = (list2);
foreach (var v in result)
{
( + "\t" + );
}
Example 3 : To solve the problem in Example 2, there are 3 ways
1. Use the other overloaded version of Union() method to which we can pass a custom class that implements IEqualityComparer
2. Override Equals() and GetHashCode() methods in Employee class
3. Project the properties into a new anonymous type, which overrides Equals() and GetHashCode() methods
Project the properties into a new anonymous type, which overrides Equals() and GetHashCode() methods
List[Employee] list1 = new List[Employee]()
{
new Employee { ID = 101, Name = "Mike"},
new Employee { ID = 102, Name = "Susy"},
new Employee { ID = 103, Name = "Mary"}
};
List[Employee] list2 = new List[Employee]()
{
new Employee { ID = 101, Name = "Mike"},
new Employee { ID = 104, Name = "John"}
};
var result = (x =] new { , }).Union((x =] new { , }));
foreach (var v in result)
{
( + "\t" + );
}
Intersect() returns the common elements between the 2 collections.
Example 4 : Return common elements in numbers1 and numbers2 collections.
int[] numbers1 = { 1, 2, 3, 4, 5 };
int[] numbers2 = { 1, 3, 6, 7, 8 };
var result = (numbers2);
foreach (var v in result)
{
(v);
}
Except() returns the elements that are present in the first collection but not in the second collection.
Example 5: Return the elements that are present in the first collection but not in the second collection.
int[] numbers1 = { 1, 2, 3, 4, 5 };
int[] numbers2 = { 1, 3, 6, 7, 8 };
var result = (numbers2);
foreach (var v in result)
{
(v);
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LINQ in C#.Net made easy! - PART 3 : Joins in LINQ | Inner Join | Group Join | Left Outer Join
In this video tutorial we are going to learn how to use LINQ Select, Where and Order By for Beginners in MVC | C# | Entity Framework Це відео автоматично взято із YouTube за назвою товару, можливий неправильний пошук.
In this video, you are going to learn the basics concepts of LINQ to objects and functions that are used commonly in just one video.
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Part 27 Union, Intersect and Except operators in LINQ
Are you looking to master Inner, Group, and Cross joins with LINQ? Look no further, because in this tutorial, we'll show you how to do it in simple and easy-to-follow steps.
In this LINQ tutorial, we'll be using the SimpleInner Join, the GroupJoin, and the CrossJoin operators to combine the data from two or more tables. By the end, you'll have the skills you need to do joins in your own projects! So don't hesitate, and check out this tutorial today to learn about Inner, Group, and Cross joins with LINQ! Це відео автоматично взято із YouTube за назвою товару, можливий неправильний пошук.
How to Use LINQ Select Where and Order by in Asp.Net MVC | C# | Entity Framework
#rpa #uipath #linq
👉 𝐄𝐧𝐠𝐥𝐢𝐬𝐡
● This video is about explaining the LINQ queries in detail.
● Learn how to Group rows of a Data Table
● Learn how to Order Data Table using one or more columns (ASC, DEC)
● Learn how to get Data from XML File using LINQ Query
● Learn how to join two Data Tables using one or more columns (Inner Join)
● The following points will be discussed:
➊ What is LINQ?
➋ Parts of a LINQ Query
➌ LINQ example for Arrays
➍ LINQ example for DataTables
➎ LINQ example for XML
➏ LINQ Function: Group
➐ LINQ Function: Order
➑ LINQ Function: Join
👉 𝐆𝐞𝐫𝐦𝐚𝐧
● In diesem Video geht es darum, die LINQ Abfragen ausführlich zu erklären.
● Lerne wie man Zeilen einer Datentabelle gruppieren kann
● Lerne wie man eine Tabelle sortieren kann (Aufsteigend, Absteigend)
● Lerne wie man Daten aus einer XML Datei anhand LINQ Abfrage auslesen kann
● Lerne wie man zwei Tabellen mergen/zusammenfügen kann, anhand einer oder mehrerer Spalten (Inner Join)
● Es werden folgende Punkte durchgegangen:
➊ Was ist LINQ?
➋ Teile einer LINQ Abfrage
➌ LINQ Beispiel für Arrays
➍ LINQ Beispiel für DataTables
➎ LINQ Beispiel für XML
➏ LINQ Funktion: Group
➐ LINQ Funktion: Order
➑ LINQ Funktion: Join
🕜 𝗖𝗵𝗮𝗽𝘁𝗲𝗿𝘀
► 00:00 Introduction
► 00:47 Agenda
► 01:02 What is LINQ?
► 01:20 Parts of LINQ Query
► 04:53 LINQ Array
► 12:50 LINQ DataTables
► 17:10 LINQ XML
► 24:48 LINQ Group
► 30:38 LINQ Order
► 36:43 LINQ Join
📝 𝗟𝗜𝗡𝗤 𝗩𝗶𝗱𝗲𝗼𝘀
𝗔. 𝗣𝗔𝗥𝗧𝗜𝗧𝗜𝗢𝗡 𝗢𝗣𝗘𝗥𝗔𝗧𝗢𝗥𝗦
➊ 𝗧𝗔𝗞𝗘:
➋ 𝗦𝗞𝗜𝗣:
➌ 𝗧𝗔𝗞𝗘𝗪𝗛𝗜𝗟𝗘:
➍ 𝗦𝗞𝗜𝗣𝗪𝗛𝗜𝗟𝗘:
𝗕. 𝗣𝗥𝗢𝗝𝗘𝗖𝗧𝗜𝗢𝗡 𝗢𝗣𝗘𝗥𝗔𝗧𝗢𝗥𝗦
➊ 𝗦𝗘𝗟𝗘𝗖𝗧:
➋ 𝗦𝗘𝗟𝗘𝗖𝗧𝗠𝗔𝗡𝗬:
𝗖. 𝗙𝗜𝗟𝗧𝗘𝗥𝗜𝗡𝗚 𝗢𝗣𝗘𝗥𝗔𝗧𝗢𝗥𝗦
➊ 𝗪𝗛𝗘𝗥𝗘:
𝗗. 𝗤𝗨𝗔𝗡𝗧𝗜𝗙𝗜𝗘𝗥 𝗢𝗣𝗘𝗥𝗔𝗧𝗢𝗥𝗦
➊ 𝗔𝗟𝗟:
➋ 𝗔𝗡𝗬:
𝗘. 𝗘𝗟𝗘𝗠𝗘𝗡𝗧 𝗢𝗣𝗘𝗥𝗔𝗧𝗢𝗥𝗦
➊ 𝗘𝗹𝗲𝗺𝗲𝗻𝘁𝗔𝘁:
➋ 𝗘𝗹𝗲𝗺𝗲𝗻𝘁𝗔𝘁𝗢𝗿𝗗𝗲𝗳𝗮𝘂𝗹𝘁:
➌ 𝗙𝗶𝗿𝘀𝘁:
➍ 𝗙𝗶𝗿𝘀𝘁𝗢𝗿𝗗𝗲𝗳𝗮𝘂𝗹𝘁:
➎ 𝗟𝗮𝘀𝘁:
➏ 𝗟𝗮𝘀𝘁𝗢𝗿𝗗𝗲𝗳𝗮𝘂𝗹𝘁:
➐ 𝗦𝗶𝗻𝗴𝗹𝗲:
➑ 𝗦𝗶𝗻𝗴𝗹𝗲𝗢𝗿𝗗𝗲𝗳𝗮𝘂𝗹𝘁:
➒ 𝗗𝗲𝗳𝗮𝘂𝗹𝘁𝗜𝗳𝗘𝗺𝗽𝘁𝘆:
✍ 𝗞𝗲𝘆 𝗪𝗼𝗿𝗱𝘀
→ UiPath
→ UiPath Automation
→ UiPath Activity
→ LINQ
→ LINQ Query
→ LINQ Query UiPath
→ LINQ Abfragen
→ LINQ Abfrage Aufbau
→ LINQ Group
→ LINQ Order
→ LINQ Join
→ LINQ Inner Join
→ LINQ Outer Join
→ LINQ Left Join
→ LINQ for Arrays
→ LINQ for Data Tables
→ LINQ for XML String
→ LINQ XML
→ LINQ Array
→ LINQ DataTable
→ LINQ From
→ LINQ Where
→ LINQ Select
→ LINQ CopyToDataTable
→ LINQ ToArray
→ LINQ UiPath Training
→ LINQ Query from A to Z
→ LINQ Order Ascending
→ LINQ Order ASC
→ LINQ Order Descending
→ LINQ Order DEC
𝗙𝗼𝗹𝗹𝗼𝘄 𝘂𝘀
📰 𝗙𝗮𝗰𝗲𝗯𝗼𝗼𝗸 𝗣𝗮𝗴𝗲:
📌 𝗙𝗮𝗰𝗲𝗯𝗼𝗼𝗸 𝗚𝗿𝗼𝘂𝗽:
💼 𝗟𝗶𝗻𝗸𝗲𝗱𝗜𝗻:
📸 𝗜𝗻𝘀𝘁𝗮𝗴𝗿𝗮𝗺:
🔥 𝗣𝗮𝘁𝗿𝗲𝗼𝗻:
🤖 𝗬𝗼𝘂𝗧𝘂𝗯𝗲: @ActAutomate
📢 𝗬𝗼𝘂𝗧𝘂𝗯𝗲 𝗦𝗵𝗼𝗿𝘁𝘀: @ActAutomateShorts
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UiPath | LINQ Training | Learn LINQ for UiPath from A to Z | LINQ Query Structure | LINQ Query Parts
#linq #datatables #uipath #rpa #automation
In this series of videos, we will be learning about the different functions of LINQ Query. We will start with basic functions from scratch to first understand the basics of LINQ.
What will you learn:
1) What is LINQ Query?
2) When & Why to use it?
3) Practical Implementation of the function
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LINQ in C# - Top 10 concepts everyone should know 🔥
The topics covered are
LINQ
Lambda expression
Filter
Sorting
First() and FirstOrDefault()
Last and LastOrDefault()
Aggregate function
Zip function
Any()
All()
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03 | LINQ To SQL | LINQ To SQL In C# | LINQ C# Tutorials | Learn LINQ | C# LINQ | Part-1 (Hindi/Urdu
LINQ Group By :
().GroupBy(Function(row) row("Item Description").ToString) Це відео автоматично взято із YouTube за назвою товару, можливий неправильний пошук.
Hello Everyone,
In this video, I will be sharing about how to use the WHERE Clause
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LINQ in C# - Top 10 concepts everyone should know 🔥
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LINQ | GroupBy using a column value | Linq query in UiPath - Part 5
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This is continuation to Part 10. Please watch Part 10 before proceeding.
The following 5 standard LINQ query operators belong to Ordering Operators category
OrderBy
OrderByDescending
ThenBy
ThenByDescending
Reverse
In Part 10, we discussed OrderBy & OrderByDescending operators. In this video we will discuss
ThenBy
ThenByDescending
Reverse
OrderBy, OrderByDescending, ThenBy, and ThenByDescending can be used to sort data. Reverse method simply reverses the items in a given collection.
We will use the following Student class in this demo.
public class Student
{
public int StudentID { get; set; }
public string Name { get; set; }
public int TotalMarks { get; set; }
public static List[Student] GetAllStudetns()
{
List[Student] listStudents = new List[Student]
{
new Student
{
StudentID= 101,
Name = "Tom",
TotalMarks = 800
},
new Student
{
StudentID= 102,
Name = "Mary",
TotalMarks = 900
},
new Student
{
StudentID= 103,
Name = "Pam",
TotalMarks = 800
},
new Student
{
StudentID= 104,
Name = "John",
TotalMarks = 800
},
new Student
{
StudentID= 105,
Name = "John",
TotalMarks = 800
},
};
return listStudents;
}
}
OrderBy or OrderByDescending work fine when we want to sort a collection just by one value or expression. If want to sort by more than one value or expression, that's when we use ThenBy or ThenByDescending along with OrderBy or OrderByDescending.
OrderBy or OrderByDescending performs the primary sort. ThenBy or ThenByDescending is used for adding secondary sort. Secondary Sort operators (ThenBy or ThenByDescending ) can be used more than once in the same LINQ query.
Example 1:
a) Sorts Students first by TotalMarks in ascending order(Primary Sort)
b) The 4 Students with TotalMarks of 800, will then be sorted by Name in ascending order (First Secondary Sort)
c) The 2 Students with Name of John, will then be sorted by StudentID in ascending order (Second Secondary Sort)
IEnumerable[Student] result = ()
.OrderBy(s =] ).ThenBy(s =] ).ThenBy(s =] );
foreach (Student student in result)
{
( + "\t" + + "\t" + );
}
Example 2: Rewrite Example 1 using SQL like syntax. With SQL like syntax we donot use ThenBy or ThenByDescending, instead we specify the sort expressions using a comma separated list. The first sort expression will be used for primary sort and the subsequent sort expressions for secondary sort.
IEnumerable[Student] result = from student in ()
orderby , ,
select student;
foreach (Student student in result)
{
( + "\t" + + "\t" + );
}
Example 3: Reverses the items in the collection.
IEnumerable[Student] students = ();
("Before calling Reverse");
foreach (Student s in students)
{
( + "\t" + + "\t" + );
}
();
IEnumerable[Student] result = ();
("After calling Reverse");
foreach (Student s in result)
{
( + "\t" + + "\t" + );
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So, what is C#?
C# (pronounced "See Sharp") is a modern, object-oriented, and type-safe programming language. C# enables developers to build many types of secure and robust applications that run in .NET. C# has its roots in the C family of languages and will be immediately familiar to C, C++, Java, and JavaScript programmers. This tour provides an overview of the major components of the language in C# 8 and earlier. If you want to explore the language through interactive examples, try the introduction to C# tutorials.
And what is IEnumerable?
Exposes an enumerator, which supports a simple iteration over a non-generic collection.
IEnumerable is the base interface for all non-generic collections that can be enumerated. For the generic version of this interface see . IEnumerable contains a single method, GetEnumerator, which returns an IEnumerator. IEnumerator provides the ability to iterate through the collection by exposing a Current property and MoveNext and Reset methods.
And what is IQueryable?
Provides functionality to evaluate queries against a specific data source wherein the type of the data is not specified.
The IQueryable interface is intended for implementation by query providers. It is only supposed to be implemented by providers that also implement IQueryable. If the provider does not also implement IQueryable, the standard query operators cannot be used on the provider's data source.
To learn more, make sure to watch the video, and we promise you that you'll become a C# developer by the end of the course! Have fun!
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