save data to DB

问题

I am using Visual Studio 2010 with SQL Server Express and LINQ to SQL

The application runs correctly when inserting data into the database during application execution. The data is inserted to the database. But, when I stop the application and click show table data in server explorer I do not see any data. Why is this so?

Here the values for the copy output direction properties for my database solution items:

database1.mdf: copy always
database1Dataset.xsd: do not copy
dataclasses1.dbml: do not copy

回答1:

database1.mdf=====> properties =======>copy output direction=copy always

This is why. You are editing a copy of the database each time you start a new debug session. Set it to do not copy and your updates will persist.

来源：https://stackoverflow.com/questions/6065914/save-data-to-db