Linq updating

Please use the database structure given below, if you want to try the following examples directly.I am assuming, you already know how to create dbml/linq to sql classes: Being Lin Q as a ORM, it’s quite easy and sql syntax free way to insert data using Lin Q.

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Today, in this tutorial, I will try to give some more examples on other types of database operations, that writes/updates the database.

These will cover writing and executing ‘Update’/’Insert’/’Delete’ query in the proper way.

So, here it’s automatically reflecting when we made change in the ‘n USer’ Object.

However, the following code won’t work: This won’t work because it causes the n User object to point another memory location reference and that memory location isn’t tracked by Data Context object.

Get Command(q); //Show the command text/sql query text on console Console. Command Text); Hope this article will be helpful for you for writing simple linq to sql query thus help doing basic database operations.

I will be writing on some more advance level linq to sql usage soon. Then just use the ‘Submit Changes’ method to commit the changes to database.Here is a simple code example below which will change a single row:(There is no difference between this and changing multiple row only need to retrieve multiple objects and change them) You will notice an interesting thing here, we didn’t have to use any extra method to tell Data Context object to notify the changes like ‘Insert On Submit’ or ‘Delete On Submit’ methods before .For example the Update, Insert and/or Get might be in some sort of repository class.The Create Customer Log and Update Customer Log might be at the higher level, maybe your UI level as it interacts directly with the UI elements. thanks a lot , you mean to say that I should insert and update records in different function and only pass the type of object which would let it know if it is insert or update , I could no understand your use of Inser Or Update() , could you explain.First, we will have to retrieve the ‘user’ object we want to delete, and then add this deletion operation in the queue by ‘Delete On Submit’ method.

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