linq query with if else condition c#

With Linq, can I use a conditional statement inside of a Where extension method? public List<ReportHierarchyModel> GetReportBaseQuery (DateTimeOffset? Is it suspicious or odd to stand by the gate of a GA airport watching the planes? For example, you must use a method call to express a query that retrieves the number of elements that match a specified condition. "No deals" : (Deals.Count() == 1 ? This is what the compiler does behind the scenes when you write queries by using query syntax. When to use .First and when to use .FirstOrDefault with LINQ? c# How do you get out of a corner when plotting yourself into a corner. Is there a reason for C#'s reuse of the variable in a foreach? Are there tables of wastage rates for different fruit and veg? Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Styling contours by colour and by line thickness in QGIS, Time arrow with "current position" evolving with overlay number, Partner is not responding when their writing is needed in European project application, ERROR: CREATE MATERIALIZED VIEW WITH DATA cannot be executed from a function, Recovering from a blunder I made while emailing a professor. . as someone commented but in this case it is not really necessary as you have the || && operators there anyway. Operator (C# Reference) [ ^] So, what have you tried to achieve? These LINQ query operators are used to filter out elements based on the indexes or by a condition in a sequence. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Connect and share knowledge within a single location that is structured and easy to search. Edit: You can make combinations like this: Status = (deals.Count () == 0 ? Don't tell someone to read the manual. Minimising the environmental effects of my dyson brain, Time arrow with "current position" evolving with overlay number. Making statements based on opinion; back them up with references or personal experience. What video game is Charlie playing in Poker Face S01E07? Booking What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? This Using .Select and .Where in a single LINQ statement The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Youll be auto redirected in 1 second. LINQ is a great feature for querying large datasets in faster way than normal approach. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. In general though, to apply very different queries, you could either use: IEnumerable<XElement> roles = xlServerRoles.Descendants ("ServerRole"); if (isDup) { roles = roles.Where (dp => . Select To learn more, see our tips on writing great answers. Thanks for contributing an answer to Stack Overflow! I have a scenario where table2 has a column called ConditionVariable and id. Some LINQ providers, such as LINQ to SQL and LINQ to XML, implement their own standard query operators and additional extension methods for other types besides IEnumerable. How is Jesus " " (Luke 1:32 NAS28) different from a prophet (, Luke 1:76 NAS28)? The ValueHolder factor is the same variable created from the from operator. Linq-to-sql uses SqlParameter to generate SQL queries, so no you do not need to do anything extra. These are all the standard query operators. What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? Check out this New 2024 Evo Red LYNX RAVE RE 850 E-TEC Ice Ripper XT 1.25 M.S. foreach - Declare variable of different type foreach Type - Declare a variable using a Type variable Console.ReadLine else-if - Console.ReadLine unexpected behaviour in else-if statement If, Else-If - If, Else-If Logic Check if . Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. @OmerK Where does in-fact product IQueryable, if the object you are running the extension method on is also an IQueryable, if you run it on an IEnumerable, you will get an IEnumerable. Is it possible to create a concave light? You can perform the where separately from the main query: var result = from dm in datacontext.Trk select dm; if (intval == 0) { result = result.Where (dm => dm.ID == 0); } else { result = result.Where (dm => dm.ID != 0); } if (result.Any ()) { // do something } Share Follow answered Jan 20, 2012 at 22:52 Chris Dunaway 10.8k 4 35 47 Why should transaction_version change with removals? July 7, 2021 In c++, linq, linq-to-sql 6 Comments Is it possible to use If Else conditional in a LINQ query? If we compare the inline if statement with the if . To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Does Counterspell prevent from any further spells being cast on a given turn? Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, LINQ equivalent of foreach for IEnumerable. FirstOrDefault () method will return the first element in the sequence that satisfies the specified condition or a default value if no such element is found. All you need is: If clientId = 0 we want ALL employees,. Therefore, even when getting started writing LINQ queries, it is useful to be familiar with how to use method syntax in queries and in query expressions themselves. The following example shows a simple query expression and the semantically equivalent query written as a method-based query. 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 Means it is mostly used in querying purpose like fetch largest value from an array. I know this will probably be a newbie question. Thanks for contributing an answer to Stack Overflow! C# if Statement The if statement contains a boolean condition followed by a single or multi-line code block to be executed. With your particular code, the answer is really simple: In general though, to apply very different queries, you could either use: Or you could maybe use the conditional operator to construct the right predicate: Move the isDup test into the Where expression itself. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. What's the difference between a power rail and a signal line? There are there Contains Methods available in C# and they are implemented in two different namespaces. - Projection condition evaluating incorrectly - If condition not evaluating as expected ifelse - evaluating else if after an if condition is true MSBuild 3.5 - MSBuild 3.5 Property Functions in Condition msbuild The conditional operator (? if (value == 21) For more information about standard query operators, see Standard Query Operators Overview (C#). from dbo. Regards, Nived N Happy Automation How to follow the signal when reading the schematic? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Find centralized, trusted content and collaborate around the technologies you use most. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. LinqExpression()_linq expression_maiker-. Making statements based on opinion; back them up with references or personal experience. If a question is poorly phrased then either ask for clarification, ignore it, or. LINQ query in C# by method syntax, using the lambda operator > Next is another use of LINQ in C#, except this time the more standard syntax is used to call the LINQ API. Also you need paranthesis around the condition in the second if statement. rev2023.3.3.43278. Why are trials on "Law & Order" in the New York Supreme Court? Is it a bug? rev2023.3.3.43278. To learn more, see our tips on writing great answers. Syntax. A Computer Science portal for geeks. If p.ConditionVariable != 0, I need to get the record from table2 with id == ConditionVariable. What sort of strategies would a medieval military use against a fantasy giant? @HafizH can you give a feedback of solutions below? My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? The standard query operators extend IEnumerable and that is why you can write numbers.Where(). In code, the commented part is what I need to solve Is there a way to write such query in LINQ? It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. Execute the query. switch-case can only compare values that can be used in a switch statement, such as integers and characters, while if/else can use any Boolean expression. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. //queryAllCustomers is an IEnumerable<Customer> var queryAllCustomers = from cust in customers select cust; The range variable is like the iteration variable in a foreach loop except that no actual iteration . The WHERE clause reduces to True or False, and the first expression looks supect. Should isn't does. Is it correct to use "the" before "materials used in making buildings are"? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 1 solution Solution 1 You don't need LINQ or a ternary operator. Asking for help, clarification, or responding to other answers. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, LINQ equivalent of foreach for IEnumerable, Concat all strings inside a List using LINQ, Using LINQ to remove elements from a List. Modified today. Don't tell someone to read the manual. This is a where, so you should use a strongly typed list. email is in use. How do I align things in the following tabular environment? You can see that the type of the query variable is the same in both forms: IEnumerable. I'll explain in detail. The first time result is an int, the second time I declare a string, and the third time result is undeclared.

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