LINQ is a technology for extracting data using an idiom derived from the C# programming language. While it owes much in functional design to SQL, it is fundamentally its own data querying language.

2015年4月27日 · When this is a linq-to-object call, multiple where clauses will lead to a chain of IEnumerables that read from each other. Using the single-clause form will help performance here. …

2013年2月1日 · I am trying to convert an old raw Sql query in Linq with Entity Framework here. It was using the IN operator with a collection of items. The query was something like that: SELECT …

2009年6月6日 · How to make a where in clause similar to one in SQL Server? I made one by myself but can anyone please improve this? public List<State> Wherein(string listofcountrycodes) { ...

2015年6月23日 · Your LINQ query (first example) and your LINQ using method chaining (second example) produce the same result, with different syntax. It is possible to write a LINQ query as a …

2009年1月14日 · Is it possible to use If Else conditional in a LINQ query? Something like from p in db.products if p.price>0 select new { Owner=from q in db.Users select q.Name } else select new {

2017年4月25日 · Wide range of operators provided by default, and others can easily be added for LINQ to Objects Language features introduced primarily for LINQ are widely applicable elsewhere (yay for …

2008年8月14日 · We're working on a Log Viewer. The use will have the option to filter by user, severity, etc. In the Sql days I'd add to the query string, but I want to do it with Linq. How can I conditionally add...

I want to change some properties of a LINQ query result object without creating a new object and manually setting every property. Is this possible? Example: var list = from something in someList...

2008年12月30日 · Is there a way to do the following using LINQ? foreach (var c in collection) { c.PropertyToSet = value; } To clarify, I want to iterate through each object in a collection and then …