select distinct rows from datatable using linq in vb.net
I need to select distinct records from a data table using linq and C and I cant seem to get the syntax correct. I have the following code, which returns all the rows in a data table, how do I just return DISTINCT rows? DataTable dt ds.Tables var q from dr in dt.AsEnumerable() select dr Select(Function(row) row.Field(Of Int32)("Count")). Distinct(). In query syntax(i didnt know that even Distinct is supported directly in VB.NET): DistinctCounts From row In loadedData. LINQ DataTable Select Distinct Rows.Using select distinct on DataTable. public static DataTable GetDataTableFromCsv(string path, bool isFirstRowHeader) string header isFirstRowHeader ? Can someone show me how I can show another column with a count of distinct rows in it, using only LINQ to get there (from the existing data in the datatable)? I guess I am looking for the T-SQL equivilant to: Select distinct COLUMN1, COLUMN2, COLUMN3, count Join datatables with LINQ, select multiple columns and sums with group by multiple columns. Datatable 1.9.4, append new tr to table and draw.In query syntax(i didnt know that even Distinct is supported directly in VB.NET): distinctCounts From row In loadedData. I want another datatable with distinct row based on given columns from SourceTable. Try This one then Dim query From q In (From p In dt.AsEnumerable() Select NewMy LINQ to SQL insert code fails Using regex function to manipulate string in c bootstrap typeahead in asp. net webforms How to View with Check.Box to select rows and a Button for inserting bulk data from Grid.View to SQL Server Database table.Grid.Template lt asp Template.
Update Rows In Datatable Using Linq Distinct ValueField lt asp Bound.Field.
Dim distinctValues dt.AsEnumerable().[Select](Function(row) New With . | RecommendLINQ / VB.NET select distinct from dataset. his dataset to distinct rows.Retrieve distinct values from datatable using linq vb.net. c - DataTable - Linq - select distinct rows based on grouping. If youre trying to retrieve distinct rows from your ADO.NET data table using code like. From oRow As DataRow In dtTable.Rows Select oRow Distinct.Thats because by default LINQ compares table rows by reference. linq to sql, select by dates that match to month and year from dates array. How to apply case when function in Linq. pass decimal column value to populate results from a table using linq query.get distinct rows from datatable using Linq (distinct with mulitiple columns). Or try this. Dim a From row In table.AsEnumerable.Distinct.ToList Select row.Field(Of String)("name") TAGS: LINQ select Distinct List. Select distinct int from 2 possible fields in list using linq. by Erik Ordway in VB VBnet. I have 7 rows of data. The rows 1 and 2 contains columns till UnitSqcNo same. I want only row 3 among the two. In general I want select all the rows with distinct model, unittype, unit and rest with greater CompId. ie the table should look like.vb.net. linq. Now number of Columns is dynamic. I am trying to use LINQ to achieve this. I am using. var distinctRows (from DataRow dRow in dt.Rows select new col1 dRow["T0"], col2 dRow["T1"], col3 dRow["T2"], col4 dRow["T3"] ). Distinct() Dim query From row In dsData.Tables(0).AsEnumerable() . Select row.Field(Of String)("User") Distinct.As for copying to data table, check out the answer to Exception using CopyToDataTable with "new " LINQ query. Below is a simple LINQ that you can use to filter the DataTable. AsEnumerable() method to return the input type DataTable as IEnumerable.Where n.Field(Of Int32)("id") 1 Select n).CopyToDataTable(). var distinctRows (from DataRow dRow in dTable.Rows select new col1dRow[dataColumn1],col2dRow[dataColumn2]). Distinct()dont forget to add System.Linq Class. var distinctValues dsValues.AsEnumerable(). .Select(row > new Distinct() Make sure you have a using System.Data statement at the beginning of your code in order to enable the Linq-to-Dataset extension methods. Im using linq query to select 2 distinct columns id and name from a datatable. Ive the code below but its throwing error specific cast is invalid. sdatatable ds. Tables.AsEnumerable().Where(x > x.Field (". Is it possible to select distinct values from a DataTable?Assuming .NET 3.5 or later, LINQ is the answer, e.g. vb.net Code: Dim names From row In myDataTable.AsEnumerable().I also found this thread (see post 10), but I cant figure out how to use it. Select multiple rows from DataTable 27/07/2008 Experts Exchange > Questions > Using LINQ in VB.Net to retreive distinct rows from datatable returnValue (From r In dt.Rows Select DirectCast(r, DataRow).Item(0)).ToList. But that gives me a list(of Object).Is there any way to distinct all columns in a datatable by using LINQ without naming all ones?