How to use dbml file in c#

I suppose the dbml file is the configuration file of the database. If I double click the dbml file VS will open it in a design diagram. The DBML file is not related to the database server at all. It's a completely client side thing. It's essentially a set of information about your tables in the database and how you're going to map them to.

NET objects. Of course, you can drag a table from a database and have Visual Studio infer some information for you automatically, but changing the file will not affect the database. You can create a DBML file from scratch without any database too. The DBML file is mapping that defines your classes based on your database schema.

Yes, it defines your default connection string, but it doesn't "configure" your database at all. Linq to Sql uses a database-first approach where you have the database and model your classes after the DB schema.

You can change property names etc from there and the mapping between the property and its correct database column name will remain intact. In the designer what you see when you double click the DBML file you can drag tables from the server explorer onto it.

You can then reference these tables in your code. There are more than a few getting started tutorials out there:. Consider SqlMetal. Here is the step by step process to generate dbml file. Click on Yes when the below confirmation displayed. Related C code will be automatically generated and we can see by opening the file MyDB. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. C where does the dbml file come from? Ask Question. Asked 11 years, 10 months ago. Active 2 years, 1 month ago. Viewed 64k times. What's next? Generate tables in database? Generate SQL script?

Generate cs files? Jim Aho 7, 8 8 gold badges 49 49 silver badges 78 78 bronze badges. NET framework version 3. Drag the "new" version of your table into the. What is a DBML file? Step 1 — Open Visual Studio Create web application. NET Framework "Orcas" release, and which allows you to model a relational database using. NET classes. Today, EF is widely used by each and every.

Launch Visual Studio Installer. Modify VS Click Modify. Launch devenv again and you should be able to open. NET to retrieve data from different sources and formats. It is integrated in C or VB, thereby eliminating the mismatch between programming languages and databases, as well as providing a single querying interface for different types of data sources. What is the use of Dbml file in asp net? Category: technology and computing databases.