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This article mainly introduces "what is the essence of LINQ fuzzy query". In daily operation, I believe many people have doubts about what the essence of LINQ fuzzy query is. The editor consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "what is the essence of LINQ fuzzy query?" Next, please follow the editor to study!

What is a LINQ fuzzy query? In fact, LINQ is actually a kind of fuzzy query, for any set of objects, as long as it can perform traversal operations, then it can be queried. Well, let's take a look at some specific things.

The syntax of the query is the same as the Sql syntax, which is really powerful. It is very convenient to use, and the form of expression is so lovely that everyone likes it. In fact, if you use LINQ on the .net 2.0 platform, you may feel depressed and uncomfortable. This is all the "disaster" caused by LINQ grammar.

The simplest syntax of LINQ fuzzy query in LINQ

Var _ result = form _ r in ResultSet where _ r.a = = "abc" select _ r

Thus, the result is a set that can be traversed. This is a very powerful function, and it is very convenient and practical to use. This kind of expression is called fuzzy query. When it comes to fuzzy query, many people will think of something studied by an old professor in colleges and universities. Alas, this is really sad. Our professors often study things that ordinary people can't use, so they come out in order to publish them in some magazines. Perhaps many academic experts will not like the simplification of the problem, thinking that these things are small tricks and are not worth studying or popularizing. However, to promote the development and maturity of software, sometimes these little things, the software has become more and more simple, there is no lack of "tricks".

LINQ Fuzzy query in .net 2.0

In fact, as long as the introduction of LINQ's dll can be used, but can not use the above powerful expression features, and to use methods and delegates, such as the use of delegates, then the ugly of LINQ will come out, the code is easily hundreds of lines, there is no simplification problem. In fact, if you use methods and delegates, I believe many people will think of their own methods to do such delegates, but if you want to simplify such methods and delegates, things are not simple. In other words, it is the excellent expression of LINQ in .net 3.0 that makes this technology shine.

So, why can't we do this simple thing? The fact is that we have not simplified the basics of the problem. To put it simply, it is impossible to provide expressions (including keywords for programming languages). We don't know the technical core of .net.

The connection of ORM of LINQ Fuzzy query

Looking at the Sql-like LINQ expression syntax above, you will think that if such an expression can be obtained and generated, which in turn allows us to translate into the sql of various databases, that is a very powerful function. If we don't use these expressions, maybe we can assemble something and make it into a different sql. Then, it's your own orm, and the problem can be very simple. But without such an expression, many things may be very difficult to do.

Hey, when, we can know the content of the process generated by LINQ.

At this point, the study of "what is the essence of LINQ fuzzy query" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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