Comment 6. Microsoft has recently announced the release of a new. NET web framework — Blazor. In this article, we are going to create a web application using Blazor with the help of Entity Framework Core. Before proceeding further, I suggest you read my previous article on getting started with Blazor.
Before proceeding, I would recommend you to get the source code from GitHub. Set the name of the project as BlazorCrud and press OK.
After clicking on OK, a new dialog will open asking you to select the project template. You will see two drop-down menus at the top left of the template window. NET Core 2. Now, our Blazor solution will be created. You can observe the folder structure in Solution Explorer as shown in the below image.
Execute the program.
It will open the browser and you will see a page similar to the one shown below. Here you can see a navigation menu on the left side, which contains the navigation to the pages in our application.
Right-click on the BlazorCrud. We will be adding our model class in this folder only. Name your class Employee. This class will contain our Employee model properties.
Now our BlazorCrud. Shared project has the following structure. We will be adding our classes to handle database related operations inside this folder only.
Name your class EmployeeContext. This is our Entity Framework DB context class to interact with the database.
How to Perform CRUD Operations Using Blazor Preview 9 and Entity Framework Core 3.0
Open EmployeeContext. Open EmployeeDataAccessLayer. And hence our data access layer is complete. Right click on BlazorCrud.
Select ASP. Press OK. This will add a FetchEmployee. Similarly, add 3 more pages AddEmployee. This page will display all the employee records present in the database.The source code has been updated to. NET Core 3. Get the source code from Github. Right click on BlazorCrud.
CRUD Using Blazor, Entity Framework Core And Dapper
Name the folder as Models. We will add our model class in this folder only. Name your class Employee. This class will contain our Employee model properties. Now our BlazorCrud. Shared project has the following structure. Name the folder as DataAccess.
We will add our classes to handle database related operations inside this folder. This is our Entity Framework DBcontext class to interact with database. Open EmployeeContext. And hence our data access layer is complete. Now, we will proceed to create our web API Controller.
Select ASP. Press OK. We will call the methods of EmployeeDataAccessLayer class to fetch data and pass on the data to the client side. This will add a FetchEmployee.
Similarly add 3 more pages AddEmployee. This page will be displaying all the employee records present in the database. Additionally, we will also provide action methods Edit and Delete on each record. On the top, we have included BlazorEFApp. Models namespace so that we can use our Employee model class in this page. We are defining the route of this page using page directive. Then we have defined the HTML part to display all the employees record in a tabular manner.
We have also added two action links for Edit and Delete which will navigate to EditEmployee. At the bottom of the page, we have a functions section which contains our business logic.
This will bind to our HTML table on the page load. In the functions section we have defined two methods. We will use the [Parameter] attribute to mark the variable as a parameter. This will not allow empID to bind to the employee id value passed in the parameter. This will bind to the fields in the form on page load itself. The HTML part will display the employee data and ask the user for a confirmation to delete the employee record.
This will display the employee records as the page loads. The last step is to define navigation menu for our application.Microsoft has recently announced the release of a new. NET web framework???
In this article we are going to create a web application using Blazor with the help of Entity Framework Core. Right click on BlazorCrud. We will be adding our model class in this folder only. We will be adding our classes to handle database related operations inside this folder only.
And hence our data access layer is complete. Now, we will proceed to create our web API Controller. On the top, we have included BlazorEFApp. Models namespace so that we can use our Employee model class in this page. We are defining the route of this page using page directive. Then we have defined the HTML part to display all the employees record in a tabular manner. We have also added two action links for Edit and Delete which will navigate to EditEmployee.
At the bottom of the page, we have a functions section which contains our business logic. This will bind to our HTML table on the page load. In the functions section we have defined two methods. The Cancel method will be invoked on clicking cancel button and redirect the user back to FetchEmployee page. The route for this page is also parametrized since we are fetching the record of the employee on page load. The HTML part will display the employee data and ask the user for a confirmation to delete the employee record.
Inside the functions section we are fetching the employee records in OnInitAsync method based on the employeeID passed in the parameter. This will display the employee records as the page loads. On successful deletion the user will be navigated back to FetchEmployee page.In my last post Get Started with Blazorwe discussed the Blazor Framework, Hosting models and how to set up authentication and authorization in a Blazor server-side application with an example.
I will use the sample application we have created in the previous post and extend it with the new functionalities we are going to talk about in this post. You will be familiar with the following topics after you read this post.
For the purpose of this post, I create a model called ToDo. Now we have added the entity and made required changes in dbcontext. Add the migration and create the table in the database through the package manager console. We have created the table in the database.Blazor : Basic CRUD Operation - Web API Calling - soundcheckassames.online Core
Create a service to access the table and perform CRUD operations. This service implements from an interface and the interface is configured in the startup for dependency injection. Okay, the data access part is now completed. Make sure, you have added the following code at the end of ConfigureServices method in startup.
This is to inject ToDoListService. I have copied the default FetchData. This code is very similar to FetchData. Now we have to call the service to fetch the data. The right place to make a service call is inside OnInitializedAsync.
It is one of the Blazor Lifecycle methods. It is executed when the component is completely loaded. You can use this method to load data by calling services because the control rendering will happen after this method. I have also added the code to display buttons for CRUD operations but not wired with any code as of now. When you run the application, you will see a page similar to this. Before we proceed with the CRUD implementations, we need to know about child components.
Blazor apps are based on components. Components are reusable building blocks, it can be an individual control or a block with multiple controls. These component classes are written in razor markup.It is an open-source, lightweight, extensible, and cross-platform version of Entity Framework. It runs on Windows, Mac, and Linux. It is an enhancement of ADO. NET that gives developers an automated mechanism for accessing and storing data in a database.
In my example, I used the name BlazorCrud. The sample Blazor application will be created. The Scaffold command will create a class for the tables that have a primary key. In our case, the Employee class and context class will be created. Enter the name EmployeeController. Select Web from the left panel, and then select Razor View from templates listed. Empty Employee Page Click the Create link to create a new employee entry.
Enter the employee details and click Save. Employee Page with a New Employee Entry Now, the created employee details are displayed as shown in the following screenshot. Application with Employees Added Click Edit to update the employee details.
A confirmation alert will appear before it is deleted from the database. Syncfusion provides more than 65 high-performance, lightweight, modular, and responsive Blazor UI controls such as DataGridChartsand Scheduler to ease the work of developers. If you have any questions, please let us know in the comments section below. You can also contact us through our support forumDirect-Tracor feedback portal.
We are always happy to assist you! Top NET Core 3. Blog Home. Select Category. Share on twitter. Share on facebook.Blazor is an experimental. It simplifies the process of creating single page application SPA and at the same time also brings the power of. NET on the table. It runs in the browser on a real. NET assemblies. NET Core.
NET Core project type from the templates. When you click Ok, you will get the following prompt. NET Core 2. As you can see, there are 2 blazor templates. NET Core hosted blazor app. Now, our first Blazor app will be created. In the solution explorer, you will find 3 projects created.
You should run the app to make sure that there are no errors. Press Ctrl-F5 to run the app without the debugger. Running with the debugger F5 is not supported at this time.
Next thing is to extend this app to create a CRUD app. It has a table and a couple of buttons. The bind is used for two-way data-binding.
Read more about data binding here. The onclick is used to call the method on the click of the button. From learn-blazor.
Steve Sanderson mentioned in the blazor intro post. This is called from C code on click of Edit, Update and Cancel button.Faisal Pathan Nov 7, Blazor 10 comments 2. In the previous post, I wrote about Getting Started with BlazorIf you are new, I recommend please you read that post first. We will use the dapper to perform CRUD operations. Now, we have successfully created a Blazor project. Below is the code of the interface. Below is the code of the class. You can download code from here.
If you want to learn File Upload in Blazor please visit here. Pls can you extend the article to add sorting, paging and filtering and the possibility of Exporting the results to Excel?
Please verify your code with this artcile, I think somewhere, you are passing single object insted of List. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Prerequisites Install the. NET Core 2. Install the latest preview of Visual Studio Install ASP. Faisal Pathan. Faisal Pathan is a founder of TheCodeHubs. He has extensive experience with designing and developing enterprise-scale applications.
He has good skill of ASP. Read More. Maurice on November 30, at pm. Thanx Faisal. Very Brillant Article. Faisal Pathan on December 2, at pm. Thanks for the feedback! Faisal Pathan on December 3, at pm.
Maurice on December 7, at pm. Faisal Pathan on December 9, at am.