Help with linq lambda groupJoin

[ppr (Peter Preuss)]

switch to the Query Syntax

[HowTo] - First Start with LINQ (VB.Net)

LINQ is part of the .NET framework and offers capabilities for interacting with data, objects or other sources within a particular syntax. This HowTo introduces on starting with LINQ (Language-Integrated Query). Current Version of this topic is DRAFT and will be finalized / enhanced soon Introduction Typical tasks for implementing parts of an automation project are interacting with e.g. with data in a datatable or items from collections. LINQ can help to implement it into a compact and standa…

@Jose_G

but the real dts are way more larger, like 30 and 45 columns

share with us

• the column structure from left and right table
  and let us know:
• the needed join column
• the needed column from table (left) and table (right)

UPD1 - Preview on options
there are several techniques to construct the row Array without the need to mention each column individually

used on the Datarow.ItemArray:

[HowTo] LINQ - First Start # Skip | Take | SkipWhile | TakeWhile Operator

This HowTo gives an introductory overview of the partition Operators: Skip, Take, SkipWhile, TakeWhile Introduction The partition operators are used to fetch a particular subset from a set of items. The returned subset is formed by the contiguous items that are matching the provided condition. Skip / Take Operator The Skip Operator will omit the subsequent items from the given start for a given length and will return the remaining items The Take Operator will return the subsequent items fr…

[HowTo] LINQ - First Start # Concat | Append | Prepend Operator

This HowTo gives an introductory overview of the conjunction operators: Concat, Append, Prepend Introduction The conjunction operators are used to add the item(s) to a particular set of items. Concat, Append, Prepend Operator The Concat Operator combines a set of items with another set of items The Append Operator adds an item to a set of items on the end The Prepend Operator adds an item to a set of items on the begin Overview I – Input P – Processing O – Output {"A","B"} / {"C",…