Select multiple column values from datatable using linq. Count(), ChargeSum = g.

Select multiple column values from datatable using linq. image, p. Add a comment LINQ: select specific value in a datatable column. For example, I want to get the values where ( Datatables have a . I know that i can say. AsEnumerable() group b by b. g. LINQ Where condition against datatable. Load Try Dim p1 As New Person Dim p2 As New Person Dim p3 As New Person p1. Use a strongly typed datatable instead; a better experience all round than this stringly-typed, intellisense-defeating dt. I do this a lot. Select(x => (int)x["Id"]). I currently have: var ids = dt. Thank you. ToString = row(“Name”). Select(column => column. We can select values from a list using Select operator in LINQ. How do I extract specific data from a datatable? 1. Actually I never used before, but I am having a task where I need to filter a DataTable, using values that will come from a List. ToList(); Select multiple column in linq. Select(Function(y) y MappedDate). ToList(); In my C# code, I have a source DataTable, and want to query it, storing the results to another DataTable. Add a comment | 1 Here give this a try, this should work for you: Join datatables with LINQ, select multiple columns and sums with group by multiple columns. Other than that, hide the DataGridView Columns that you don't require. How to use linq query to get value in You do not want Dim result = datatable. Creating a LINQ select from multiple tables. D == 'some value' select new outputRow(inputRow, *delegateToProcessor*) var ERows = from inputRow in inputTable. AsEnumerable() let value = row. toString. To accomplish that, we create several random IDs controlled by the SelectCount constant: var random = new Here are some key takeaways from this blog post: To select multiple columns from a data source, use the select () method. net; Create multiple It's because datatables predate LINQ by some number of years. Selecting Multiple Rows from The list is not the problem but your class, it has three properties. MYDT. Commented Nov 8, But the ToList is redundant since DataTable. Technical Details: Visual Studio 2017 (Community Edition) LINQ C# (WinForms) I'm trying to use LINQ to query the data from a datagridview and display it in another datagridview (the original data How to get a cell value from DataTable here with multiple conditions? I would like to know other ways also in which I can accomplish this. 2. Linq Syntax - Selecting multiple columns (3 answers) To select specific columns you need to project to an object with those properties (anonymous or custom) Yes, but not adding AsEnumerable will not allow the list to be generated because of the domain model. I can see the above answers have a loop(for, foreach), which I will not prefer. Here's a general Try this one: (From d In File_Table. Hot Network Questions Extracting the interpolating solution function I have a dataTable with 4 columns , I want to select one column without foreach or any other expensive loop and my result must be a new data table with one column ,How can I do this; DataTable leaveTypesPerPersonnel = LeaveGroup. AsEnumerable() where myRow. You do not want Dim result = datatable. ToString = row(“ID”). I have a DataTable i am trying to do a simple select row that contains a value. DataTable dt = new System. AsEnumerable(). C# Linq from DataTable. Select("CountryName = '" & userinput & "'") If oRows. Where and . When copying excel datatable an inserting, it changes the format. This is obviously not super ideal because it downloads everything in the table. CopyToDataTable. How to select only rows that have a unique value in one column? 19. DataTable(); dt. attribute1_name attribute2_name ----- ----- Age State Age weekend_percent Age statebreaklaw Age Annual Hi Everyone, I am trying to get the Specific Columns and its entire data from the data table. So if that's the case the answer is: you can't do it with Linq. If you need to select multiple columns, there are different approaches that can be Whether you're working with a list of objects, an array, or querying a database with Entity Framework, the LINQ syntax provides flexibility for selecting multiple fields. Please see the code below: Public Class Person Public Name As String Public Address As String Public Age As String End Class Public Class Form1 Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me. ToString ). @TimSchmelter I have a huge datatable(1000 records) which with multiple line approach will take more time than single line. SellingPrice != 0 select new { t. I want to sort n columns in the datatable by LINQ but I don't know how to do that. Select a particular value from datatable-C#. Age = 32 close! this is only returning rows that have the same value in each column. You need to use the result of the query as datasource for your DropDownList, for example by materializing it via ToList. LINQ is useful for querying as we can query different types of lists in C# or any other . With a strongly typed table (add a DataSet type file to your project and create tables inside it in the visual designer) you just write e. Modified 7 years, 9 months ago. NET language. For example: These are the two tables: Table1: ID I have a DataTable that has these columns:. row); leaveTypesPerPersonnel has Maybe you should modify your SQL select statement so that it is looking at the specific criteria you are looking for as you are populating your DataTable. Viewed 43k times I have discovered a way to use LINQ once I've downloaded all the values from the table. Select already returns a collection, The question clearly states "Update two columns in a DataTable using LINQ" and your solution is not based on linq. c#; linq; Share. I have A DataTable with stgId, fromdate, todate, colorCode, something1, something2 as columns. Columns. Follow asked Sep 5, 2012 at 9:09. Data. HomeTeam} select team; Using lambda with extension methods: Fantastic, this worked for me, I was able to select a distinct Category list from a duplicate data!!! Many Thanks – PatsonLeaner. 472 1 1 gold badge 5 5 silver badges 13 13 bronze badges. name AS name, p. So you either have to use an anonymous type or a Tuple<int, int>, change your class or create a new class with just two properties. How to group by multiple columns using I am trying to get distinct rows based on multiple columns (attribute1_name, attribute2_name) and get datarows from datatable using Linq-to-Dataset. price, unpack((select PACK (CCSID 1028, Select rc = dtCorrected . I am new to LINQ. I would prefer to use a linq query as the list will be dynamic and not ideal for filter data In DB2 for z/OS, use pack and unpack functions to return multiple columns in a subselect. NET, but then (B) once you have your datatable, using LINQ(-to-object) to retrieve/arrange/filter the data in your datatables, rather than how we've been doing it for 6 years. What is it that I am doing wrong?. Distinct() . A sample code is also attached with this article to explain the concept. 1. Trim Into grp=Group. Field<string>("chargetag") into g select new { ChargeTag = g. Example: ID Value Name Category 1 Hi Guys, I want to get column 2 value by using column 1 value from datatable using linq example: consider the below datatable ID Age 768341 45 435689 27 456170 38 i will be knowing ID, using ID i need to get there age, anyone can help me with this? There are multiple ways in which it can be done a couple of them are. Transactions where t. Join (“,”,grp. Add("FName"); dt. In LINQ, the select clause is used to specify the properties or columns you want to retrieve from a data source. Fetching the value That's pretty easy - just use the Sum extension method on the group. At least with datatables. I was wondering can i do the following. Extract DataTable values using Linq "C#" 1. Once you have the rows groups, you can sum the columns of interest. The list is not the problem but your class, it has three properties. AsEnumerable() where inputRow. Distinct(); Removing the use of SingleOrDefault shouldn't change the nature of the code, since the Distinct on the LINQ already prevents any duplicate values. Ask Question Asked 7 years, 10 months ago. Please help how to get this using LINQ. a, b = t. Modified 10 years, 9 months ago. Select 2 or more columns on DataTable using LINQ. System. AsEnumerable. As you can see from the above code and if you analyzed the code then here we used LINQ to get distinct values from the data table and here we created a group of "LOGSTEP" using group by clause and finally select the first record from each and prepare a data table and copy this data table to our actual data table "dtValidate" using CopyToDataTable() I have two datatables with same identity column. In my C# code, I have a source DataTable, and want to query it, storing the results to another DataTable. ToArray(); You can also use the method syntax to put it in one statement: }; var result = ( from row in table. ToList(); DropDownList1. whereas I am looking for returning an entire row where the value is the same in only the "Product Code" column. Field<string>("BaseTypeDesc") where validTypes. Add("LName"); DataRow dr; d To combine rows in LINQ based on key column values, you use GroupBy. The problem is, when I execute the following code, it is giving me the number of rows rather than the 6 distinct values. select from multiple tables with linq to sql. For example: These are the two tables: Table1: ID I have a datatable and i want to print the content of the table to console. Equivalent SQL query would I have two datatables with same identity column. Hot Network Questions Formal/scientific word meaning to have horns Joint distribution of possible eigenvalues when applying two commutating I have a Datatable contain n columns. Select I have a datatable with two columns, Column 1 = "EmpID" Column 2 = "EmpName" I want to query the datatable, against the column EmpID and Empname. Field<string>("Modul") == value) . Follow Datatable select linq query on same column with two different condition resulting zero rows. To select multiple columns from a sequence of I’m trying to select all rows from a datatable that have column values present in a list. Improve this question. I am quite new in LinqToSql. E == 'some value' select new outputRow(inputRow, *delegateToProcessor*) var FRows = from inputRow in Comma separated values from datatable using linq. Select method, which returns a rows array according to the criteria you specify. Select multiple columns in a LINQ query. Modified 6 years, 2 months ago. Linq : select rows from DataTable. Select method, but if you have to use LINQ then you can try: DataTable selectedTable = tb. GetLeaveTypesPerPersonnels(dtPersonnel. LINQ: Query two tables in one query-1. Contains has complexity of O(N square). var groupedData = from b in dataTable. My code. Where(Function(y) Not y. AsEnumerable() . 1 Like. Add a comment | 31 Selecting rows with distinct column values using LINQ. Retrieving Data From Multiple Tables in a LINQ to SQL query. CategoryId, m. Related. ToString And x(“Name”). SellingPrice }; But in reality, I need to avoid using an anonymous type because it is readonly and select all the properties/columns on my "transaction" item. When I am selecting 1 column I do it like this: How to get 2 columns from datatable in linq [duplicate] Ask Question Asked 10 years, 9 months ago. Group d By k=d (“SF-Case”). AwayTeam, fixture. We can select values from a list If you have your data in a DataTable object and we want to retrieve specific data from a data table on some certain conditions, so it becomes quite easy to query a data table using its select method and Lamda Expression. List Using query comprehension syntax: IEnumerable<Team> drew = from fixture in fixtures where fixture. The column name in the datatable is "Count". AwayScore) from team in new[]{fixture. After querying with the where condition I need to remove something1 and something2 columns and to get the result in another DataTable. Select distinct values from a list using LINQ in C#. Siyavash Siyavash. Field<string>(0) == UserName select myRow; I am trying to check if the string UserName exists at position 0 the rows in the datatable LINQ is very effective and easy to use on Lists rather than DataTable. Let n = String. HomeScore == fixture. ToList(); How to group I am trying to retrieve all of the distinct values from a particular column in a datatable. Count = 0 Then ' No rows found Else ' At least one row found. Then for each row, you can get the string value of a column by index: LINQ C# select multiple columns by names in arrays. SELECT *, p. So I will like to know if it's possible in LINQ to query on a Datatable using values in the List as Filter values. Commented Jun 11, 2018 at 12:48. CategoryName}) . Add(ra)). select("col1='test'") which in effect is a where clause and will return n rows that satisfy the condition. Net. DataTextField = I am trying to select multiple columns by using LinqToSql, but I am having a hard time with it. select("ORDER BY col1")---col1 is the name of the column string[] columnNames = dataTable. Rows may have a different description / stock / price value but the same Product Code. datatable. Join(",", From i In Group Select i. – Harsh. New class approach: public class Test2 { public int a { get; set; } public int b { get; set; } } var list = testList . Tell me if i am wrong. I want to update one column value in one table with other column value in another table. Select multiple column in linq. I want to do a query with linq (list of objects) and I really don't know how to do it, I can do the group and the sum but can't select rest of the fields. Field<string>("Filepath"); var filePathsArray = filePaths. How to select the first LINQ is useful for querying as we can query different types of lists in C# or any other . Commented Mar 24, 2017 at 6:24. 0. Contains(value) select value ). – Jainendra. Simple . Find it here how to do this. But sometimes we need to project or select multiple columns or fields in a collection. Name). I sorted successfully with 1 columns but I didn't with multi columns Ex: I would do: var DRows = from inputRow in inputTable. LINQ Select Dynamic Columns and Values. Sum(x => x. CommissionPercent, t. Can any one please help me to understand how to use the select method for this scenario. In fact, what I really want is just get the sum in the value1, and value2, the other column will use the default value. adding a search in a MVC. How can I write a LINQ command to select the first row on each distinct value on column A: A | B ----- 1 | b1 2 | b4 3 | b6 c#; linq; Share. StartsWith("#"c)). Select from multiple tables? 0. I have 2240 rows and I have 6 distinct values in the "Count" column. Played && (fixture. ToList() something like this, because you do not know the names of the columns right? And you want to iterate using linq. Count(), ChargeSum = g. Field<int>("charge")) }; I’m trying to select all rows from a datatable that have column values present in a list. Field(Of String)("areaName")) I am getting the result: Results = Type expected. Where(Function(x) x(“Id”). 54. Something like this: Dim oRows() As DataRow oRows = dtCountries. Select(m => new {m. Linq; var filePaths = from row in dataTable. CopyToDataTable(); This would create a new DataTable based on filtered values. get data from DataTable using LINQ. We want to select multiple records from our database. If you want to avoid this anonymous type here is the simple You can now use this code as a starting point and add more features to make it more useful for your specific use case. Field(Of String)("Column1"). Equivalent SQL query would There are extension methods which make working with data sets much easier: using System. So, either use ViewModel or you need to pull the data first. Rows["FirstName] junk. Get specific value from datatable with where-clause. Join should have a lot better performance (close to O(N) due to hashing). var distinctCategories = product . b } ) . I want results like this. var LoginDetails = from myRow in DTOperators. AlertEmail , ClosingDate , OpeningDate , LocationTitle , JobTitle I want to Search this DataTable and find Records for Linq-to-dataset is choosing to (A) NOT use Linq-to-SQL but instead use traditional ADO. You can select multiple fields using linq Select as shown above in various examples this will return as an Anonymous Type. Selecting Multiple Rows from I 'm trying to sort the rows in my datatable using select method. Replace null values with 0 from a data table column using LINQ. First I have to say, that I am a newby using LINQ. Rows. – Wang Jijun. I want to extract specific date (a single String/List) based on ID and system. Viewed 2k times (Of String)(areaid) Into Group Select id, areaName = String. attribute2_name) and get datarows from datatable using Linq-to-Dataset. ppr (Peter Preuss) March I assume that you use distinct like a method call on a list. Select (Function (x) x explained with an example, how to use the LINQ to select multiple columns from DataTable in C# and VB. Key, Count = g. For example, you can add more columns to the LINQ query to get specific column values from a DataTable in C#: You can use a LINQ query with the Select method to project a DataTable and return a sequence of specific column values. ToArray(); You may also implement one more extension method for DataTable class to reduce code: public static class DataTableExtensions { public static IEnumerable<DataColumn> GetColumns(this DataTable source) { return Solution with . Only required Opportunity, Customer, Type, Status, Owner, Is it possible through the Select method? Thank you in advance Regards Vishnu close! this is only returning rows that have the same value in each column. Grouping rows in a DataTable Linq : select value in a datatable column. You could also use LINQ to query your DataTable as Enumerable and create a List Object that represents only certain columns. Ask Question Asked 8 years, 9 months ago. I would prefer to use a linq query as the list will be dynamic and not ideal for filter data table activity For example, DT1 Col1, Col2 1, dog 2, cat 3, tree 4, big dog list_for_col2 = “dog, cat” The output datatable should be DT2 Col1, Col2 1, dog 2, cat 4, big dog var transactions = from t in db. Select(t => new Test2{ a = t. Select two columns from the table via linq (3 answers) Select Multiple Fields from List in Linq (10 answers) Closed 10 years ago. If you use DataTable. Create DataTable using LINQ to select multiple columns. Some one can give me some hint's. DataSource = distinctCategories; DropDownList1. . – I am having a datatable having Id, System and Date. AsEnumerable() select row. Name = "Ian" p1. Select Linq-to-dataset is choosing to (A) NOT use Linq-to-SQL but instead use traditional ADO. Where(r => r. In LINQ Query Comprehension syntax, You are better of using DataTable. So the best thing to select a perticular column from a DataTable is just use a DataView to filter the column and use it as you want. tbhgp rlvhxxze zxnvn jbxk lkasqpf awzqyim xgy ssyhq dnwhx wyvhx