Select all rows from datatable using linq c#

Author: yljc

August undefined, 2024

WebSep 9, 2014 · You will most likely use a Linq projection like in the code below and build a collection of custom objects. Then you can walk the collection with foreach loop and build table records from the objects. You use a distinct function. have to go into some kind of foreach loop to detemine what the column type is and get records that way. WebSince you're already using LINQ, here's another option: var validTypes = new HashSet { "Order", "Motion", "Service", "....." }; var result = ( from row in table.AsEnumerable () let value = row.Field ("BaseTypeDesc") where validTypes.Contains (value) select value ).Distinct ();

How to get list of one column values from DataTable in C#?

WebSep 15, 2024 · In a LINQ query, the first step is to specify the data source. In C# as in most programming languages a variable must be declared before it can be used. In a LINQ … WebDec 26, 2024 · How to Query DataTable using LINQ in C# Employee Table Most of LinQ query result is in an array or list data, but using this method we can easily convert the result to a Datatable. In this example we have an Employee table where we want to get a specific record. CopyToDataTable (); the surgery ratcliffe road

[Solved] How to return datatable by linq & lambda - CodeProject

WebSep 25, 2024 · 1. You can index a DataColumnCollection by a DataColumn, like this: // Find the DataColumn by column name string columnName = "Part Number"; DataColumn … WebApr 25, 2024 · I am having a datatable having Id, System and Date. I want to extract specific date (a single String/List) based on ID and system. Please help how to get this using LINQ. MYDT.AsEnumerable ().Where (Function (x) x (“Id”).ToString = row (“ID”).ToString And x (“Name”).ToString = row (“Name”).ToString ).Select (Function (y) y ... WebMar 19, 2024 · give a try on (From s in searchtermlistvar From r in yourdatatablevar.AsEnumerable where r (YourColumnNameOrIndex).toString.Contains (s) Select r).CopyToDataTable keep in mind .CopyToDataTable thtows an exception if no rows are returned. Additional Handling of this is possible as well Updated Flow And LINQ: … the surgery potton

How to query a DataTable with Linq in C# - iDiTect

Query DataTable using LINQ in C# FreeCode Spot

WebAug 13, 2024 · Solution 1. If it's not a typed dataset, then you probably want to do something like this, using the Linq-to-DataSet extension methods: var distinctValues = dsValues.AsEnumerable () .Select ( row => new { attribute1_name = row .Field< string > ( "attribute1_name" ), attribute2_name = row .Field< string > ( "attribute2_name" ) }) .Distinct ... WebMay 9, 2024 · A DataTable object has a built-in select method that has the following signature: DataRow [] DataTable.Select (string filterExpression, string sort) Where the input parameters are: filterExpression: criteria to use to filter the rows. sort: string specifying the column and sort direction. Return Value the surgery preston lancashireWebJun 9, 2024 · @Allix In you controller under declaration section, do declare this line "public yourDataBaseName _anyVariableName = new yourDataBaseName (); " and then use LINQ Query given above to select data. Will work for sure! the surgery rainham

"WebAug 9, 2016 · i dont want use foreach 1 solution Solution 1 try this C# DataTable DT = new DataTable (); DT.Clear (); DT.Columns.Add ( "نام" ); DT.Columns.Add ( "نام خانوادگی" ); DataTable dtNew = db.TblUsers.Where (x => x.Id != 0 ).Select (k => { var row = DT.NewRow (); row.ItemArray = new object [] { k.Name, k.Family }; return row; }).CopyToDataTable (); " - Select all rows from datatable using linq c#

Select all rows from datatable using linq c#

Oracle: How To Efficiently Select Rows Using A Key List

WebOct 29, 2024 · As @DA924 said, you can't directly use linq to select detailed column names for datatables of dynamic columns. I suggest that you don't have to use linq. You can use custom methods and loops to perform the operations you need on these two datatables. Here is another method to join these two tables without linq: WebSep 15, 2024 · In a LINQ query, the first step is to specify the data source. In C# as in most programming languages a variable must be declared before it can be used. In a LINQ query, the from clause comes first in order to introduce the data source ( customers) and the range variable ( cust ). C#

Did you know?

WebJan 11, 2024 · 1) Declare the data table with sample duplicate records. 2) Get distinct records from Datatable using LINQ. Implementation So, let us start the actual implementation, and as per our requirement let's design a simple form with a grid view and a simple button, and on click event of a button we will load data from the data table to the … WebI have a string parameter 'type' to my method, which can be null, single value or multiple values separated by comma as follows: I need to return all rows if type is empty else return only the rows matching the string array. I am using following LINQ in my server side cs file: When i pass null,

WebDec 26, 2024 · Below snippet will select row from the Employee Table above and place the result under a new table. DataTable NewTable = (from emp in Employee.AsEnumerable () … WebApr 14, 2024 · The logic to transform the data into an List of Expando objects is implemented in the two private methods of my data access layer (see below). The public interface just contains parameterized methods to fetch the data (which is the way I usually write this sort of thing anyway).

WebHow to count field in DataTable using LINQ query in C#: You can use a LINQ query with the Count method to count the number of rows in a DataTable that match a certain condition. …

WebSelect All distinct values in a column using LINQ; Select distinct using linq; LEFT JOIN in LINQ to entities? Cannot convert lambda expression to type 'string' because it is not a delegate type; How to get first record in each group using Linq; Unable to create a constant value of type Only primitive types or enumeration types are supported in ...

WebHow to query a DataTable with Linq in C# In C#, you can query a DataTable using LINQ by converting the DataTable to an IEnumerable using the AsEnumerable () extension method. This allows you to perform LINQ … the surgery prestonWebNov 5, 2012 · Here you will see how to get all the datacolumn values from Employees datatable using LINQ. Code snippet: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data; namespace LINQinDatatable { class Program { static void Main (string[] args) { //Create a datatable the surgery portland road kilmarnockWebApr 30, 2012 · select * from [name of your table] where sid=101 or sid=102 or sid=109; If you have a DataTable object you can access the data with the following statement: C# string theData = [name of your object].Rows [Y].ItemArray [X].ToString (); Y is the row index (first row is 0) and x the column index. Posted 30-Apr-12 1:43am dj dourak Comments the surgery rawmarshWebI'm using System.Linq.Dynamic to provide dynamic querying of a number of database sources (SQL server) and it all works really well, but now I've hit a snag. I need to be able to take two numeric columns and format them into a single string. Essentially what this boils down to is that I'm doing something like this (note, this isn't exactly what I'm doing … the surgery recreation drive billingeWebApr 8, 2024 · Solution 2: Your approach is probably the most efficient way to do it, unless keyList came from Oracle in the first place (for example, if it was the result of another query then you'd want to combine those queries). I definitely would not execute once for each key on the list, as round trips like this can be very costly. the surgery recreation driveWebSep 22, 2024 · Select multiple rows from DataTable using LINQ in C# and VB.Net A function named GetData is used to fetch the records from the Customers table and return them in … the surgery proWebSep 9, 2014 · You will most likely use a Linq projection like in the code below and build a collection of custom objects. Then you can walk the collection with foreach loop and build … the surgery reading road hook