This series of examples shows you Language Integrated Query (LINQ) techniques to use with collections and arrays.
"Object is currently in use elsewhere" error for picturebox "Parameter is not valid" - new Bitmap() "Recursive write lock acquisitions not allowed in this mode.? "Settings" in DLL project properties and app.config file "The function evaluation requires all threads to run" while accessing mus...
Learn techniques to extend the standard LINQ methods. Query based on runtime state, modify query objects, and extend LINQ capabilities.
i written method to retrieve route stored in an database. route has sub entity called route country.country holds two rows one for arrival and another row for departure country.i want to get routes on given arrival and departure country Id's .code i written as follows, public IList<EuropeB...
Sometimes people wonder if it is possible to use LINQ to SQL without having to use the designer and the automaticallygenerated .dbml files and classes. The short answer is yes, and it is not even very hard to do.In the end it may be worth using the designer, for example,...
There are multiple ways to concatenate strings in C#. Learn the options and the reasons behind different choices.
Learn to query dynamically depending on run-time state, by varying either LINQ method calls or the expression trees passed into those methods.
I would like to be able to search two records of name at the same time. I am using the following code and I cannot get the query string work(api/data?id=786&id=899). I am currently using the split function in the linq query, which is not producing correct output, as it only pro...
But what if you want to use the Distinct method for a collection of objects of your own type? For example, like this: class Number { public int Digital { get; set; } public String Textual { get; set; } } class Program { static void Main(string[] args) ...
What is the proper thing to put in LINQ's WHERE criteria to represent NULL? EDIT: OK, I ended up using WHERE a.FiendName.Equals(Nothing) It seems to work, but is that the "best" way to do it (the only way)? All replies (2) ...