Run Scaffold Dbcontext On Visual Studio For Mac

In this blog, I am going to provide a walk-through on developing a web application using ASP.NET Core 3.0, connecting it to a database (database-first) using the Entity Framework Core 3.0 command, and performing CRUD operations using scaffolding (code generator). I am going to develop a sample application for inventory management with basic operations.ASP.NET Core is a web framework from Microsoft. It is an open-source, cross-platform, cloud-optimized web framework that runs on Windows using.NET Framework and.NET Core, and on other platforms using.NET Core. It is a complete rewrite that unites ASP.NET MVC and Web API into a single programming model and removes system-related dependencies. This helps in deploying applications to non-Windows servers and improves performance.This blog post will discuss the following:.Note: In this demo application, I have used ASP.NET Core 3.0 Preview 8, Entity Framework Core 3.0 Preview 8, with Visual Studio 2019 16.3.0 Preview 2.0. PrerequisitesA.NET Core application can be developed using these IDEs:.

Scaffolding a database produces an Entity Framework model from an existing database. The resulting entities are created and mapped to the tables in the specified database. This feature was introduced in MySQL Connector/NET 6.10.2-beta and 8.0.8-dmr; however, scaffolding is not supported with all versions of Connector/NET (see Table 8.2.

Visual Studio. Visual Studio Code.

Command PromptHere, I am using Visual Studio to build the application. Be sure that the necessary software is installed:. Visual Studio 2019 16.3.0 Preview 2.0. NET Core 3.0 Preview 8.

SQL Server 2017Create databaseLet’s create a database on your local SQL Server. I hope you have installed SQL Server 2017 in your machine (you can use SQL Server 2008, 2012, or 2016, as well).Step 1: Open Visual Studio 2019.Step 2: Open SQL Server Object Explorer and click Add SQL Server.Adding SQL ServerStep 3: Here we have an option to choose from the local machine’s SQL Server, connected via network, and the Azure SQL database.

I have chosen the local SQL Server instance. I provide the SQL Server details and click Connect. The SQL Server will be listed in Explorer.Establishing connection to the database serverSQL Server listed in Solution ExplorerStep 4: Right-click on a database node and create a new database ( Inventory).Step 5: Now we have the database in place. Click on our database and choose New Query.Step 6: For this application, I am going to create a table called Products with basic attributes.

Paste the following SQL query into the Query window to create a Products table. Create Table Products(ProductId BigInt Identity(1,1) Primary Key,Name Varchar(100) Not Null,Category Varchar(100),Color Varchar(20),UnitPrice Decimal Not Null,AvailableQuantity BigInt Not Null,CratedDate DateTime Default(GetDate) Not null)Step 7: Click the Run icon to create the table.

Now we have the table needed for our application. Create an ASP.NET Core applicationFollow these steps to create an ASP.NET Core application.Step 1: In Visual Studio 2019, click on File - New - Project.Step 2: Choose the Create a new project option.Step 3: Select the ASP.NET Core Web Application template.Step 4: Enter project name and click Create.Step 5: Select.NET Core and ASP.NET Core 3.0 and choose the Web Application (Model-View-Controller) template.Uncheck the Configure for HTTPS under the Advanced options (in a development environment, we have no need of SSL).Click Create. Then the sample ASP.NET Core application will be created with this project structure. Install NuGet packagesThe following NuGet packages should be added to work with the SQL Server database and scaffolding. Hi, thanks for your article. I learnt a lot.I tried to follow the steps and when I try to create the controller.

I got the following errorNo database provider has been configured for this DbContext. A provider can be configured by overriding the DbContext.OnConfiguring method or by using AddDbContext on the application service provider. If AddDbContext is used, then also ensure that your DbContext type accepts a DbContextOptions object in its constructor and passes it to the base constructor for DbContext.I would like to ask how I could solve it.Thank you. Hi ABBEY,Thanks for your feedback. Thank you for this helpful post!I am working on an app that is similar but following a slightly different way. I created a table using MSSQL which has carID as primary key and other attributes like brand, model etc.

I followed the steps to generate carRentalDBContext.cs and this is a part of the code from this class:protected override void OnModelCreating(ModelBuilder modelBuilder)modelBuilder.Entity(entity =entity.Property(e = e.CarId).HasColumnName(“carID”).ValueGeneratedNever;entity.Property(e = e.Brand).IsRequired.HasColumnName(“brand”).HasMaxLength(50).IsUnicode(false); the code continuesAnd this code from Create.cshtml:

Install-Package Microsoft.VisualStudio.Web.CodeGeneration.Design -Version 3.1.0. Install-Package Microsoft.EntityFrameworkCore.Tools -Version 3.1.0. Install-Package Microsoft.EntityFrameworkCore.SqlServer -Version 3.1.0Follow the below steps,Step 1: Upgrade the packages to the above version by running the above command in Package Manager ConsoleStep 2: Try to create the controllerStep 3: Now controller get created with CURD operationThanks,Kannan Eswar. Aztech hw550 3g drivers for mac.

Blu ray cover template awesome dvd label template for mac. Hi GHADA,Follow the below steps,Step 1: Follow the answer mentioned in the below post to resolve the issueStep 2: I hope you created project using.NET Core 3.1. At the time of writing blog latest version was.NET Core 3.0 Preview 8, hence I have referred preview version of packages. But for the.NET Core 3.1, we need latest version of packages as below,Install-Package Microsoft.VisualStudio.Web.CodeGeneration.Design -Version 3.1.0Install-Package Microsoft.EntityFrameworkCore.Tools -Version 3.1.0Install-Package Microsoft.EntityFrameworkCore.SqlServer -Version 3.1.0Install the above packages by running the command in Package Manager Console. And follow the blog to perform CRUD operation.Thanks,Kannan Eswar.

Hi JASON,Thanks for your feedback.In my perspective repository pattern is not needed with Entity Framework Core, since Entity Framework Core itself comes with the below necessary benefits of repository pattern,–Abstraction between business and data access layer–Single save on context (Unit of work)–Unit testing (Mock services)Please refer the below links which explains about how we can use Entity Framework Core to achieve the above mentioned benefits,If you still need to implement repository pattern, please refer the below links,Thanks,Kannan Eswar. Hi JITHIN V P,I hope you created project using.NET Core 3.1, and I suspect that problem with.Net Core version and packages what we have added.

At the time of writing blog latest version was.NET Core 3.0 Preview 8, hence I have referred preview version of packages. But for the.NET Core 3.1, we need latest version of packages as below,. Install-Package Microsoft.VisualStudio.Web.CodeGeneration.Design -Version 3.1.1. Install-Package Microsoft.EntityFrameworkCore.Tools -Version 3.1.2.

Install-Package Microsoft.EntityFrameworkCore.SqlServer -Version 3.1.2Follow the below steps,Step 1: Upgrade the packages to the latest version by running the above command in Package Manager ConsoleStep 2: Try to create the controllerStep 3: Now controller get created with CURD operationThanks,Kannan Eswar.