Questions tagged [linq]
Language Integrated Query (LINQ) is a Microsoft .NET Framework component that adds native data querying capabilities to .NET languages. Please consider using more detailed tags when appropriate, for example [linq-to-sql], [linq-to-entities] / [entity-framework], or [plinq]
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Generic LINQ query predicate?
Not sure if this is possible or if I'm expressing correctly what I'm looking for, but I have the following piece of code in my library repeatedly and would like to practice some DRY.
I have set of ...
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answer
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Query to retrieve names of group nodes
If I had some XML such as this loaded into an XDocument object:
<Root>
<GroupA>
<Item attrib1="aaa" attrib2="000" />
</GroupA>
<GroupB>
<...
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How do I avoid a memory leak with LINQ-To-SQL?
I have been having some issues with LINQ-To-SQL around memory usage. I'm using it in a Windows Service to do some processing, and I'm looping through a large amount of data that I'm pulling back from ...
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What is the LINQ way to implode/join a string array? [duplicate]
I have the following string array:
var sa = new string[] {"yabba","dabba","doo"};
I can convert it to "yabba, dabba, doo" it using string.Join() but what is the super-cool LINQ way of doing it? The ...
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How do I write this in Ruby/Python? Or, can you translate my LINQ to Ruby/Python?
Yesterday, I asked this question and never really got an answer I was really happy with. I really would like to know how to generate a list of N unique random numbers using a functional language such ...
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How to debug a LINQ Statement
I have a Linq to objects statement
var confirm = from l in lines.Lines
where (l.LineNumber == startline.LineNumber) || (l.LineNumber == endline.LineNumber)
select l;
The confirm object is ...
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Can you do LINQ-like queries in a language like Python or Boo?
Take this simple C# LINQ query, and imagine that db.Numbers is an SQL table with one column Number:
var result =
from n in db.Numbers
where n.Number < 5
select n.Number;
This ...
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Getting started using Linq, what do I need?
Basically what the title says. (Forgive me because I am a .NET newb)
In my department, we have a server running .net 3.5 and ever since I got into this section I have been using LINQ. However, I am ...
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Linq to SQL Grouping Child Relationships
I'm trying to run a LINQ to SQL query that returns a result in a grid view in a search engine style listing.
In the simplified example below, is it possible to populate the collection with a comma-...
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How fast is LINQ?
I need to manipulate 100,000 - 200,000 records.
I am thinking of using LINQ (to SQL) to do this.
I know from experience that filtering dataviews is very slow.
So how quick is LINQ?
Can you please ...
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Design Patterns using IQueryable<T>
With the introduction of .NET 3.5 and the IQueryable<T> interface, new patterns will emerge. While I have seen a number of implementations of the Specification pattern, I have not seen many ...
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Dynamic LINQ and Dynamic Lambda expressions?
What is the best way of dynamically writing LINQ queries and Lambda expressions?
I am thinking of applications where the end user can design business logic rules, which then must be executed.
I am ...
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Can I return the 'id' field after a LINQ insert?
When I enter an object into the DB with Linq-to-SQL can I get the id that I just inserted without making another db call? I am assuming this is pretty easy, I just don't know how.
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LINQ to entities - Building where clauses to test collections within a many to many relationship
So, I am using the Linq entity framework. I have 2 entities: Content and Tag. They are in a many-to-many relationship with one another. Content can have many Tags and Tag can have many Contents. So I ...
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linq equivalent of 'select *' sql for generic function?
I've got a generic<> function that takes a linq query ('items') and enumerates through it adding additional properties. How can I select all the properties of the original 'item' rather than the ...
- 5,656