Code for updating database in asp net


31-May-2017 14:38

code for updating database in asp net-46

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You now have 4 SQL script files but no actual tables.

You are ready to deploy your database project to localdb.

This topic addresses the situation where you have a database and want to generate code for a web application based on the fields of that database.

This approach is called Database First development.

This part of the series focuses on creating a database and populating it with data.

This series was written with contributions from Tom Dykstra and Rick Anderson.

If the tools are not available for your database, you may need to perform some of the database-specific steps within the management suite for your database.If you have a problem with the database tools in your version of Visual Studio, make sure you have installed the latest version of the database tools.For information about updating or installing the database tools, see Microsoft SQL Server Data Tools. You will deploy this database to Azure later in this tutorial, so you'll need to set Azure SQL Database as the target platform for the project.You can create the tables needed for this tutorial by adding SQL scripts that define the tables. CREATE TABLE [dbo].[Student] ( [Student ID] INT IDENTITY (1, 1) NOT NULL, [Last Name] NVARCHAR (50) NULL, [First Name] NVARCHAR (50) NULL, [Enrollment Date] DATETIME NULL, PRIMARY KEY CLUSTERED ([Student ID] ASC) ) Notice that the design window automatically synchronizes with the code. CREATE TABLE [dbo].[Enrollment] ( [Enrollment ID] INT IDENTITY (1, 1) NOT NULL, [Grade] DECIMAL(3, 2) NULL, [Course ID] INT NOT NULL, [Student ID] INT NOT NULL, PRIMARY KEY CLUSTERED ([Enrollment ID] ASC), CONSTRAINT [FK_dbo. Course_Course ID] FOREIGN KEY ([Course ID]) REFERENCES [dbo].[Course] ([Course ID]) ON DELETE CASCADE, CONSTRAINT [FK_dbo. Student_Student ID] FOREIGN KEY ([Student ID]) REFERENCES [dbo].[Student] ([Student ID]) ON DELETE CASCADE ) You can populate your database with data through a script that is run after the database is deployed. This script simply adds data to the database when no matching record is found.

It does not overwrite or delete any data you may have entered into the database.

Launch Visual Studio and create a SQL Server Database Project. Setting the target platform does not actually deploy the database; it only means that the database project will verify that the database design is compatible with the target platform.