Query in LINQ like in

1.linq inside-like query

list<string> Source = new list<string>{"AAA", "BBB"};

list<string> px = new List<string> {"AAA", "BBB", "CCC"};

var q = from S in source

From P in px

where s==p

Select S;

2. Get the set of P.dstate in (1, 100,200) inside the set

list<int> pp = new list<int> {1, 100,200};

if (queryString = = "AllState")

{

Datasouce = new observablecollection<docregister> (from P in _returnlist

From the IDs in pp

where p.dstate = = IDs

Select P). ToList ());

}

3. Filter the data set according to a condition querystring is the condition

Datasouce = new Observablecollection<docregister> (_returnlist.where (p = = P.dstate = = Convert.ToInt32 ( queryString)). ToList ());

Query in LINQ like in