Select all rows from datatable using linq c#

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WebApr 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

c# - How to use LINQ query in C# to filter data by empty or single ...

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 ... 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). lawn mower repair maple ridge

Oracle: How To Efficiently Select Rows Using A Key List

WebNov 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 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. … WebApr 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. kancare clearinghouse kansas fax number

c# - How to use LINQ query in C# to filter data by empty or single ...

DataTable.Select Method (System.Data) Microsoft Learn

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. 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 … kancare clearinghouse hoursWebI'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 … lawn mower repair marathon fl

"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 (); " - Select all rows from datatable using linq c#

Select all rows from datatable using linq c#

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

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 () … 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#

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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 … WebAug 8, 2015 · In the following query we are selecting the rows from the data table where Id is greater than 1 and then populating a new data table with the returned values. var dataRow …

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: … 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 ();

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 … 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

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 …

WebSep 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 … lawn mower repair maple shadeWebSince 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 (); lawn mower repair maple groveWebIn this example, we create a DataTable with two columns, "Id" and "Name", and add three rows to it. We then use the AsEnumerable extension method to convert the DataTable to an IEnumerable, and use the Select method to extract the "Name" column from each row using the Field method. We then convert the result to a List called names. lawn mower repair marionWebJan 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 … lawn mower repair manuals downloadWebJun 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! kancare clearing house phone numberWebApr 11, 2024 · how to linq pivot use reflection genric. Apr 11 2024 4:33 AM. from my sql view retunrs. so in asp.net core i need to return list of rows from dal as. as. pivot data on … lawn mower repair marbachWebOct 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: kancare clearing house number