joining two sets in LINQ

Posted by user343209 on Stack Overflow See other posts from Stack Overflow or by user343209
Published on 2010-05-19T16:41:09Z Indexed on 2010/05/19 16:50 UTC
Read the original article Hit count: 312

Filed under:

LINQ

|

join

|

sets

|

c#

    var setsA = new List<SetA> {
        new SetA { SsnA = "3450734507", name = "setA"},
        new SetA { SsnA = "6833467788", name = "setA"},
        new SetA { SsnA = "5452347787", name = "setA"},
        new SetA { SsnA = "9345345345", name = "setA"},
    };

    var setsB = new List<SetB> {
        new SetB { SsnB = "5452347787" ,name = "setB"},
        new SetB { SsnB = "9345345345", name = "setB"},
    };

when i use this linq:

var Set =
                from seta in setsA
                join setb in setsB
                 on seta.SsnA
                    equals setb.SsnB
                select new { 
                    SSN = seta.SsnA,
                    NAME = setb.name
                };

i get this value:

{ SSN = "5452347787", NAME = "setB" }
{ SSN = "9345345345", NAME = "setB" }

but i would want to have SET which combines these two and the result would be:

{ SSN = "3450734507", NAME = "setA" }
{ SSN = "6833467788", NAME = "setA" }
{ SSN = "5452347787", NAME = "setB" }
{ SSN = "9345345345", NAME = "setB" }

This would be a result set that would tell me with the name NAME property which set it was taken from, if SSN was found in SetA and SetB it would have property NAME = "setB"

could someone help me with this?

© Stack Overflow or respective owner

Related posts about LINQ

LINQ to SQL, LINQ to XML and Accessing DataTable using LINQ

as seen on C# Corner - Search for 'C# Corner'
This article demonstrates how to use LINQ on DataTable, XML Data using LINQ to XML and SQL server data base using LINQ to SQL Classes. >>> More
Exception with Linq2SQL Query

as seen on Stack Overflow - Search for 'Stack Overflow'
I am running a query using Linq2SQL that comes down to following query: DateTime? expiration = GetExpirationDate(); IQueryable<Persons> persons = GetPersons(); IQueryable<Items> subquery = from i in db.Items where i.ExpirationDate >= expiration … >>> More
What is Linq?

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
The way data can be retrieved in .NET. LINQ provides a uniform way to retrieve data from any object that implements the IEnumerable<T> interface. With LINQ, arrays, collections, relational data, and XML are all potential data sources. Why LINQ?With LINQ, you can use the same syntax to retrieve… >>> More
Mixing Silverlight-Specific System.Xml.Linq dll with Non-Silverlight System.Xml.Linq dll

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a Logic layer that references Silverlight's System.Xml.Linq dll and a GUI that is in WPF (hence using the non-Silverlight System.Xml.Linq dll). When I attempt to pass an XElement from GUI project to a method in the Logic project, I am getting (basically) "XElement is not of type XElement" errors… >>> More
Subsonic 3 LINQ vs LINQ to SQL

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am using SQL Server 2005 in a project. I have to decide about datalayer. I would like to use LINQ in my project. I saw SubSonic 3 supporting LINQ and I also have option for LINQ to SQL, because i can have typed lists from LINQ to SQL. I am wondering what is different between LINQ to SQL and… >>> More

Related posts about join

Improving Partitioned Table Join Performance

as seen on SQL Blog - Search for 'SQL Blog'
The query optimizer does not always choose an optimal strategy when joining partitioned tables. This post looks at an example, showing how a manual rewrite of the query can almost double performance, while reducing the memory grant to almost nothing. Test Data The two tables in this example use… >>> More
MS SQL 2008, join or no join?

as seen on Stack Overflow - Search for 'Stack Overflow'
Just a small question regarding joins. I have a table with around 30 fields and i was thinking about making a second table to store 10 of those fields. Then i would just join them in with the main data. The 10 fields that i was planning to store in a second table does not get queried directly, it's… >>> More
SQL Server 2008, join or no join?

as seen on Stack Overflow - Search for 'Stack Overflow'
Just a small question regarding joins. I have a table with around 30 fields and i was thinking about making a second table to store 10 of those fields. Then i would just join them in with the main data. The 10 fields that i was planning to store in a second table does not get queried directly, it's… >>> More
Simple join gives unnecessary rows,How to get join properly with only matches in both tables

as seen on Stack Overflow - Search for 'Stack Overflow'
Table 1 Field1 Field2 AA 20 AA 20 AB 12 AC 13 Table2 field3 field4 AA 20 AA 20 AC 13 AD 23 AW 21 output required: newfield field2 field4 AA 20 20 AA 20 20 AC 13 13 I used: select field1 as newfield, t1.field2,t2.field4 from table1 t1 join table2 t2 on t1.field1=t2.field3 This… >>> More
Mulitple full joins in Postgres is slow

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a program to use the IMDB database and am having very slow performance on my query. It appears that it doesn't use my where condition until after it materializes everything. I looked around for hints to use but nothing seems to work. Here is my query: SELECT * FROM name as n1 FULL JOIN… >>> More