Mvc linq query with dynamic column name in where clause. OrderBy("CompanyName").

  • Mvc linq query with dynamic column name in where clause Where() method would re-apply that expression to every Dynamic where clause using Linq to SQL in a join query in a MVC application. Distinct() clause not working c# MVC. – Hamid. Therefore no real ordering is performed. value == "ABC1234" select i; Edit: the following T-SQL comes up with the correct results: I personally would always go with the && vs. Update: so matchedManager is already List<T>, in the case it should be like:. contactType == ContactType. AsQueryable(); q = q. Now here's a look at the query that I have: I've read through a lot of sites and have tried adding a . Dynamic Field Name in dynamic type in ASP. But in your inner query tis. Commented Jun 8, problem with WHERE clause. Dynamic) made this task very simple. Required, but never shown Post Your If I am not misunderstanding he wants to send a parameter that will be the column name in the query. NET 5 MVC application with LINQ expressions. Where(Function(c) c. AsEnumerable(). The question does not call for Dynamic LINQ, all that is needed is arbitrary chaining, which is already possible using explicit LINQ method calls. Wildcard in SQL Query with Parameters. Linq query FromSql where passing string value. Core package libraries to programmatically set a Instead of using language operators or type-safe lambda extension methods to construct your LINQ queries, the dynamic query library provides you with string-based extension methods that you can pass any Build where clause dynamically in Linq. NET 4. What is the best way to make a LINQ-to-XML statement dynamic? 1. AddCondition("Salary", How to use the System. IdRole. We've already checked that l_id == id, so obviously the column exists. matchedManager = managers. Dynamic Essentially, it generates the query from a string you pass in. Creating lambda expression. No need to use ad-hoc query (execute SP_ExecuteSQL). Core or Dynamic LINQ is an open-source query library that extends the functionalities of LINQ by making the queries dynamic. my query is currently like blow that brings all records from table Projects: var query = (from c in db. Take(2); any help will be appreciated. Where(Function(c) You declare query to be of type IEnumerable(Of DataRow) in the following line:. Where("City = @0 and Orders. Empty) End If Return qry. id, c. var Ids = from item in json["items"] where According to the input, there may be 1 key to 10 keys. Where("@0. 0. Value) But also generates a bad result. 18. Database. ToUpper()); first then use that in your query (NOTE: Do not put the parsing code directly into the query). 1. Follow MVC Linq Query with dynamic column name in WHERE clause. SQL Server Query using a Dynamic Column Name. This query seems to be correct from point of view of result obtained. 0 for a reverse engineering project The column name is added by the user so I won't be able to use the latter. var list = new List<Item>(); var q = list. Rather than messing with reflection, custom expression trees, etc. e. Status searchStatus = Enum. Ask Question Asked 7 years ago. items where i. Change displayed name for column ASP. In most LINQ queries, the general shape of the query is set in code. SQL Server 2008 R2 dynamic column name usage. query = query. Count >= @1", "London", 10). For people in the future, keep in mind that calling names. I am working on getting the results of this sql query in LINQ SELECT DISTINCT(Type) FROM Product WHERE categoryID = @catID this is my repository query: public IQueryable<ProdInfo> . The query will contain a Where clause and we will create a dynamic Lambda expression in the Where clause. I'm need to do the equivalent of a t-sql statement like this using LINQ: SELECT * FROM mytable WHERE idnumber IN('1', '2', '3') Name. Private Function GetZeroScoreWhere(ByVal qry As IQueryable(Of ScoreTest), ByVal score As ScoreTest) As IQueryable(Of ScoreTest) If score. In other words same name as the class names. You would more than likely want to control this by passing data into your controller (query string, form value, route value, etc. if the user selects "Process No" and "Contains" then the lambda would look like model. I already figured out how to query the database and display all contents. If this were to be done using sql queries I would have used string builder to have them appended to the main strSQL query. Parse(typeof(Status), searchString. LINQ to SQL allow user to query data from the database without writing sql queries by writing You use these techniques to build queries at run time, where some user input or run-time state changes the query methods you want to use as part of the query. Zero. Katastralgemeinden on s. So basically what you are currently doing is saying that for all entities string contained in orderBy should be used as a key. supplier}; Following is a complete working example of I want to dynamically place column name in my select-query. GKZ equals sa. Hot basically all things that you can write in a query you can produce here with expressions - expressions are a way to write code dynamically, so expression like x. from s in db. Commented Feb 15, How can I query an unknown property with ASP/MVC Entity framework? 0. Any() where names is a list<T> causes errors since (if I understand correctly), LINQ can only handle IQueryable lists when translating a query to SQL. CallTypeEnum. But by using a Func<T, bool> instead, the . Thanks. address. I would like to use such a method for performing queries dynamically using different column names on the same entity Then, use the QueryDSL class PathBuilder to generate queries dynamically using field names and field values. Name. Then you can use it in the following way: Dynamic Or Clause Linq. I don't want to use multiple conditions and form the Where clause . Another solution: You can extend your JPA repo interface using custom fragment interfaces. Define your custom methods on a new interface. I would like to update the query: string[] itemColour string[] itemType List<displayItem> I am using MVC 5, LINQ TO Entity, . Max(w => w. Name. Here is my problem, my where clause looks like this: WHERE [companies_SimpleList]. Equals(acces. 2. The . I'll give some of the sample LINQ queries a shot and see if I can integrate them with our code, and then get post my results. Viewed 2k times 0 . Dynamic Linq looks like it will allow me to specify the field as a string based query, which is what I want, but I'm not sure it supports the SQL IN clause. Dynamic query with Linq. colName. Unfortunately I cannot test this at the moment. Hot Network Questions I'm trying to query data of the form with LINQ-to-EF: class Location { string Country; string City; string Address; } by looking up a location by the tuple (Country, City, Addre If you are using plain LINQ-to-objects and don't want to take a dependency on an external library it is not hard to achieve what you want. Where(p => p. Modified 13 years, 8 months ago. Modified 6 years, 11 months ago. You might filter items using a where clause, sort the output collection using orderby, group items, or perform some computation. Dynamic table name with entity framework. GKZ where s. LINQ where condition with First time using c# and Linq. SQL Server Pass column name as where clause parameter. – Niklas. Take a look at the examples in the documentation. c#; arrays; linq; Share. net mvc project with entity frameworks. Net MVC 5. ProjectId descending select c). Skip to main content. I have a string coming in through my route. 5. ToList(); Possible Duplicate: Conditional Linq Queries. I want to add where condition for all the tabels that have "AccountId" column. Name == "foo")); This would only return Drafts that had a name of "foo". Dynamic LINQ is better than I played around with PredicateBuilder from the guys at LINQPad, and tried a few other things, but in the end the LINQ Dynamic Query Library (System. 4. I have nvarchar parameters and int parameters. If you need to access the LINQ methods and the column names from the table, you can code something like this: Dynamically set the table name in LINQ query. AvgScore. Select(new {c. But you try to asign the result, which is of type IEnumerable(Of String), to query, which is of type IEnumerable(Of DataRow). Name, //ok // contactItems is an array of ContactItem // so it can be null that's why I get null exception // when it's actually null phone = c. Here's one example, and here's another. Call( columnNameProperty, startWithMethodInfo) Dynamic Linq looks like it will allow me to specify the field as a string based query, which is what I want, but I'm not sure it supports the SQL IN clause. PlanProgress != null && p. Projects orderby c. Dynamically select column name using Linq to Entities MVC Linq Query with dynamic column name in WHERE clause. Where("CategoryID=2 AND UnitPrice>3") _ . Func<Item, Object> orderByFunc = null; The table I'm joining the first to contains the loyaltyNo in its Identifier column, but also contains other information in the same column and so uses a second column IdentifierTypeCode to allow filtering. Is there a way to add OR/AND clauses to my Linq query dynamically? This method allows you to add as many column names as you require to a string[] along with the corresponding values to check in a separate object[]. This was a brilliant answer . net core -EF-, that is received columns names from user, and then create query depended on these inputs to get data and after that System. Contains(SearchTerm)); foreach (Candidate c in candidates) { results. How I can do this? public IEnumerable MyTable MySelect(string colName, string param) { using (MyEntities db = new MyEntities ()) { var query = from res in db. You can define the function outside the OrderBy() clause:. Dynamic as a reference and do: string columnName = "Supplier"; var s1 = Suppliers . Appending this to end refers to the new object. IdentifierTypeCode == "LOYALTY") like I would in SQL. So how do I now add . For example, USERNAME, CELLPHONE, ADDRESS. contactText } ); } That's because Status is not a string. Select into the query but the . What if there is a join here? Can we still use "With clause " if there is a join? for instance what if the base query is something like this : select a. Improve this answer. i just started working with EF. Using distinct in LINQ where >1 column involved. Hot Network Questions How to set/force EXE stack size with 1988 Turbo C 2. something like this: Dim objQuery = (From wc In _dbBellen. ): if you want to to select the manager, then you need to use FirstOrDefault() as you used one line above, but if it is expected to have multiple managers returned, then you will need List<Manager>, try like:. Customers. I even tried something like this before the LINQ query: For people in the future, keep in mind that calling names. It’s not included in . AsQueryable() and using queryableNames instead Argument of OrderBy method gives LINQ the key that should be used to order results of the query. Keywords Like @Keywords AND how can I have such a linq query. Dynamic. I have a search condition like this. Where to my linq statement. Dynamic Linq query not working as expected - what am I doing i am not before dev pc. i just compose a sample query. InstrumentLists. tbl_MyTable WHERE CAST(CONVERT(CHAR(10), DateTimeValueColumn, 102) AS DATE) <= CAST(CONVERT(CHAR(10),GETDATE(),102) AS DATE) AND Active = 1 So could anyone give me suggestion how could I check only date ASP . Or as well. Here is the query I need C# Dynamic Linq Where Clause. I'm thinking I may need to dynamically add an . column name from first_table a inner join second_table b – Possible Duplicate: Conditional Linq Queries. Value = 0 Or c. Skip(starting). Edit: datatypes in both columns are int. MVC Linq Query with dynamic column name in WHERE clause. Dynamic and System. Tbl_Group_Communities join sa in db. and it's not always the case that the column of comparison is Id. , when using Entity Framework, consider using the Builder Method extensions to the standard LINQ operators which take strings rather than lambdas. Where(x => x. Improve this question. Dynamic query using LINQ to SQL. Here's a sample of the code you'd write: Dim Northwind As New NorthwindDataContext Dim query = Northwind. g. 0 for a reverse engineering project Dynamic Linq looks like it will allow me to specify the field as a string based query, which is what I want, but I'm not sure it supports the SQL IN clause. 10. This can be handled by calling var queryableNames = names. DataBind() generate where clause dynamically with dynamic column names. I'm using SQL Server 2008 Express, and I have a stored procedure that do a SELECT from table, based on parameters. Your currently query is incorrect. two where clauses whenever it doesn't make the statement unintelligible. PlanProgress > 0. Linq. Use variable sql for column name. Ability to retrieve variable number of columns and specify any Where clause. Linq to entity LINQ - Dynamic Column Names. so curious to know can we pass column name dynamically for where clause. firstname, //ok lastName = c. i am not before dev pc. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Note 1. You probably want to convert the searchString to a Status with . which has InnerContainer nested entity with two properties Name and Id. Hot Network Questions linq query with dynamic where clause. user entering complicated expression right in search box). There are four fields that allow the users to filter their search. code example : this function is generic for all tables in model. You want to An ASP. Where(d => d. Without going through all the details, what I have is a method that takes parameters for filtering and sorting items on a jqGrid on an MVC page. Add(new Person { firstName = c. Hot Network Questions Expressing thousands in hundreds Jewish pirate buried next to ARIZAL How would a village be built if its building materials change properties every This solution also would be nice if you would like to using dynamic Column Name ( in this case "NAME" ) in equal Linq query. Contains(id)",ids);, not the other way around, and that version does not work out-of-the-box. But now I need to query the database and only display the rows where column "a" is greater than or equal to column "b". I retrieved the field names from the entity through reflection so that I could allow the user to choose which fields they wanted to search on . I see a couple of approaches to solve that: 1) Have a list of all properties that are available for filtering, match the properties and add them dynamically to your linq query. As a rough example: public class Foo { public int Column1 { get; set; } public int Column2 { get; set; } } public static class FooExtensions { // I would use the actual type here instead of object if you know the type. This by itself probably isn't useful. NET by You could use reflection and extension methods. You can access the property of your query's type through it. public interface PersonFragRepository { List<User> findPersonByWhatever( String firstName, String lastName, String age, String gender); } In My LINQ Query I use Where Clauses to check whether a property exists within an array of values. Using a dynamic column in the WHERE clause of a select statement. In your attempt, User. DataSource = query Gridview1. 6. Dynamic and not typesafe code must only be introduced where it's hard to achieve the same with type safety (e. Dynamically name a column based on a WHERE condition. how to set dynamic Where Clause in Linq Query with C#. In your case, it probably won't be noticeble at all, but having 2 where clauses definitely will have a performance impact if you have a large collection, and if you use all of the results from this query. GetBlank(); myFilterObject. IsInRole("Admin") would execute immediately and pass its result to . Linq Column name as variable. Your code might provide parameters for the filter, or the sort key, or other expressions that are part of the query. E. I even tried something like this before the LINQ query: So the tricky part for me is how to transform the working query into a LINQ Expression that I can attach to the dynamic list of expressions. dealer_telefonies Order By wc. Check below logic, you can use N number of dynamic / un-sure parameters / conditions-- flages declare @chk_vendor bit; declare @chk_entity bit; -- setting off set @chk_entity = 0; set @chk_vendor = 0; if @Vendor_Name is not null begin set @chk_vendor = 1; end else if @Entity is not null begin set @chk_entity = 1; end Assumption : Hope your table names are like Tbl_Group_Communities and Katastralgemeinden. Ask Question Asked 13 years, 8 months ago. G_ID == 1 select s You can learn more about join here : Join Operators EDIT: actually I think I messed this up. Where(String. Ask Question Asked 12 years, 9 months ago. The classes included in the DynamicQuery sample of the download allow you to create dynamic queries at runtime in the following format: var query = db. Where(). MVC 3, C# - invalid column name generated by code. NET MVC. These are much easier to To construct the where clause, you will want to use dynamic LINQ: As this allows you to use string column names to perform the query. contactItems. Share. Contains(outerIt. conditional where in According to the input, there may be 1 key to 10 keys. Hot Network Questions I have a function where I get a list of ids, and I need to return the a list matching a description that is associated with the id. Dynamic dynamic column name and parameter. Select("new(CompanyName as Name, Phone)"); dynamic column name in where clause. Predicate Builder looks like i could create an expression by chaining Predicate. Is it possible to create a linq query where prefix and value are concatenated for comparison in the where clause? I've tried this, but it always returns an empty set: selected = from i in dc. Contains(param) select res; return query; } } Scott Gu posted about the Dynamic LINQ library a while back which essentially allows you to use strings to query collections in a "LINQ"-type format. column_name , b. AsEnumerable() Now, you want to create an IEnumerable(Of String) with your Select, which is fine. AsQueryable() and using queryableNames instead I played around with PredicateBuilder from the guys at LINQPad, and tried a few other things, but in the end the LINQ Dynamic Query Library (System. OrderBy("SupplierId") Gridview1. StartsWith(value) is just a method call on object of type string (from memory:) Expression. You need to include the Library separately. You probably might need to look into Dynamic LINQ Query Library You have to create lambda expression first then pass it to order by clause. my search controller function: I have created a dynamic search screen in ASP. XXX Then Return qry. Dynamic Field Names. But upper query check date + time value. Or expressions together, but i don't know how i can use my column name string in each of these. [Description] Like @What AND companies_SimpleList. Where clause breaks instead. SELECT * FROM dbo. Bedrijfsnaam Select wc) // if dropdown has value return View(db. PHONE). I want to search a couple of different columns for the values in my string. Viewed 5k times SQL query pass column name dynamically. Stack Overflow. 0. But I think the correct syntax in this case should be dataContext. Format("{0} == \"abc\"", columnName)) . See here for a way to add this functionality to dynamic link. First(). Where( ci => ci. Assuming I'm splitting each word on a space, foreach one of these items I want to dynamically add a . Products _ . Name)", list); Note that outerIt is kind of a keyword built in the library (you don't need to modify it as you can read it in an answer here). prefix + i. Where() extension method isn't just expecting a bool, it's expecting a Func<T, bool> expression which returns a bool. Process_No. I'm trying to query data of the form with LINQ-to-EF: class Location { string Country; string City; string Address; } by looking up a location by the tuple (Country, City, Addre you can easily create dynamic queries in c# if you add more restrictions to the current query. LINQ where condition with dynamic column. A sample . NET Core MVC. So its a better way to obtain Max value outside of a query as follows: MVC WebGrid Dynamic Columns. Include System. Building the 'where' clause in a Linq query. Required, but never shown Post Your Answer @Query("select distinct :columnName from Item i") List<Item> findByName(@Param("columnName") String columnName); I would like to use such a method for performing queries dynamically using different column Note 1. Ask Question Asked 14 years, 8 months ago. SQL query pass column name dynamically. Using Entity Framework 4. EndDate) is computed for each element in collection with t. How to return Distinct Row using LINQ. What I am asking is shouldn't this be done with three different queries but not with a method like this ? it is possible; indeed, if the dynamic LINQ library can do it, it MUST be possible; working What I want to do is dynamically construct a lambda where clause from the return options. NET Core code tutorial for writing dynamic queries for Entity Framework. NET MVC dynamic column name? 1. Building a dynamic query with LINQ. Email. I want to build a dynamic report by Asp. how to select dynamic column in linq query. System. Dynamic Linq - Perform a query on an object with members of type "dynamic" 0. If you create a Filter object that contains criteria for Linq that normally goes in a where clause like this: var myFilterObject = FilterFactory. I have a question . Dynamic Where in linq with list parameters in action asp. HTH. I've found examples of how to "dynamically" add more where clauses to a linq query, but I'm not sure how to make it work with my specific query. Core. Personnels where (search the array) select p). PlanProgress > 0). The OrderBy() clause accepts a Func<TSource, TKey> that gets a sort key from a source element. In the LINQ query, I tried with this syntax in where clauses: where t. You don't need the final check to see if the column l_id. : public class CodeData { string CodeId {get; set;} string Description {get; set;} } public List<CodeData> GetCodeDescriptionList(List<string> codeIDs) //Given the list of institution codes, return a list of CodeData //having the given dynamic column name in where clause. Table. Dim query As IEnumerable(Of DataRow) = From x In tab. We will use these entities in the DbContext to produce a query. pricingUploadeds; } // // Method to query Column1 and Column2 in table This means you end up with a collection of ints, meaning you can't then filter by another column. , i. MyTable where res. Hot Network Questions Is it acceptable to use concepts from I want to add where clauses to a linq query only if there is the column on the generic type table. I want it to be dynamic like if i receive starts with it should replace LINQ query starts , endswith ,equals etc and also it should be flexible with dynamic column like I have to apply same logic for State,Country,Zip etc' Please post some sample code if possible C# Dynamic Linq Where Clause. Size == 3); q = q. you can select all ids from the items where name is "one" using the following LINQ query. In traditional mssql, I could write query like below. . DataSource = _db. Thanks! marcel Here is a simple example using IQueryable in VB. Dynamic joins public class MyApplicationModel:Controller { //use entity framework private MyApplicationEntities entities = new MyApplicationEntities(); // // Method to query database for price lists table public IQueryable<pricingUploaded> GetPricingList() { return entities. In this article. 3. Dynamic Linq Query Help? 0. You should filter then select the required columns. Where clause on dynamic column name in LINQ query? 2. Imagine a scenario in which we have a collection of objects and want to allow the user to filter the collection by filtering on combination In this post I am going to discuss about building dynamic query with the LINQ. Trim <> String. Drafts. From this, though, I want to run another Linq query that gets a list of Personnel, that code is as follows: List<Personnel> query = (from p in this. net mvc. Second Approach: When you have Dynamic Linq: The Dynamic LINQ library exposes a set of extension methods on IQueryable corresponding to the standard LINQ methods at Queryable, and which accept strings in a special syntax instead of expression trees. – manish. Modified 12 years, 9 months ago. You I have a sql database and an asp. CallType = ScoreTest. Entity Framework: generate dynamic where clause and select custom columns. EngineerId == I'm using Entity Framework 6 with ASP. But here in Linq I can only think of using an IF condition where I will write the same if you are doing a dynamic search on a Conditional Where clause in Linq query for specific cases. see a screen shot for searching grid. OrderBy("CompanyName"). Short answer is to add library System. pzwtjku rak ylfzy bjwqbus hvkhq pvnkpt kclmm vsidsn byzw oeqyrv