How to update data using linq to entities

The following example gets the results grouped by each Standard. We captured this query using the SQL Profiler tool. In simple terms, we can say that Ordering is nothing but a process to manage the data in a particular order. It is not changing the data or output rather this operation arranges the data in a particular order i. In this case, the count is going to be the same but the order of the element is going to change. In the following example, we sorted the students based on the FirstName.

When you execute the above program, the following SQL Script is created and executed in the database for both Method and Query syntax. Instead of projecting the data to a particular type like Student, we can also project the data to an anonymous type using LINQ-to-Entities queries.

Here, you may choose some of the properties or all of the properties of an entity as a result. The following example returns a list of anonymous objects which contain only the FirstName and LastName properties. So, the compiler will mark it as anonymous. When you execute the above program, the following SQL Script is executed in the database for both Method and Query syntax. The LINQ Inner join is used to return only the matching records from both the data sources while the non-matching elements are removed from the result set.

So, if you have two data sources let us say Student and StudentAddress, and when you perform the LINQ inner join, then only the matching elements i. For better understanding, please have a look at the following example. For a better understanding of LINQ Joins and how to perform the left join, how to join more than two tables, please read the following article. Please give your valuable feedback and suggestions about this article.

Github: ranacseruet. This is indeed a very useful piece of information. I know this code is gonna help me famous in lab session tomorrow! Thnx a lot buddy! Nice Post Buddy…………. Keep It Up………………………. Thank you so much. Just a comment on style, instead of using:. Id ; nUser. RoleId; nUser. Username; nUser. Password; UDB. Chevex: But note that it get a lot more involved when using another context instance.

What does it mean to "use another context instance"? I've tried it, but for some reason, in my case it duplicates instead of update. The old record is maintained and a new record is created with the information of the record I suppose to update. What is happening? Mamun Zohaib Iqbal Zohaib Iqbal 1 1 gold badge 4 4 silver badges 6 6 bronze badges.

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