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We create a form that posts to our OnPost handler, along with an input for Name. Navigate to the new BlazorApp directory created by the previous command: Take a quick look at the contents of the BlazorApp directory. If you receive a dotnet: command not found error, make sure you opened a new terminal window. Next, we are going to get the lottie.min.js from cdnjs site. I am not going to explain the steps in detail here, because the IBM Cloud is a commercial site, owned by IBM, and they can change the way it is working according their needs, meaning any detailed description can be made obsolete. We select Debug -> Start Debugging or press F5 or click on the debug button in Visual Studio toolbar. At this point, many other tutorials assume that the remote API is existing or they suggest usage of an existing demo API. Take note of the BlazorApp directory path as you will use it later in the tutorial. Instead of images, we want to show animations. In HTML, those animations are finally made into SVG animations, when the final markup is made in client browser. Blazor is new framework for building Web applications. The content of this file are as follows (I have put an interesting command in file itself, as a reminder mainly to myself about few troubles I experienced when playing with this): Now we have to update Index.html and include references to both scripts, lottie.min.js and workLottie.js. A common feature in a web application is making calls to remote APIs via the http protocol. We first start by creating a storage mechanism to hold our Name value. It is from this site that I have downloaded the Lottie animations, used in the article, you can find plenty of Lottie animations there. There was filter for Lite plan selected, when the screenshot was made. From here, we can edit the HTML in our Razor Page. When you log in into IBM Cloud and go to Catalog and then select Databases, you will see something like this, depending on your plan. First part of this URL is your username, then comes the database name, and then comes either a document id, or kind of query or something else. We are going to create a basic calculator app, which is able to do addition, subtraction, multiplication, and division. This solution was created in spring of 2020 (amidst the Corona Covid-19 times), so current versions, at this time, of all products and corresponding frameworks, NuGet or NPM packages were used. We will get then only the docs part from all json data, provided by Cloudant, other part being bookmark and warning if any, see Part 2 of the article for more details, and convert those documents to an array of Person objects. Animated gif in the beginning was made while there were between 15-20 000 records in database. Especially with OnAfterRender, which is called twice when a page is rendered. We will need some logic to determine which animation is to be shown in which case and the other is markup. The article consists of three parts. Then, we change the server.js by adding few lines about CORS. 2022 C# Corner. The markup for LiveDemo.razor is pretty simple, especially as we put most of the necessary stuff in Person and Lottie components. In LiveDemo class, we create the HttpClient as private variable, we do not inject it as we did in Working.razor. Razor Pages is included within .NET Core from version 2.0 onwards, which is available as a free download as either an SDK (Software Development Kit) or a Runtime. In this example, dotnet watch showed it was listening on http://localhost:5000. If something on this page wasn't clear or you have a suggestion for how to improve it, let us know. Blazor contains all the features of a modern web framework such as: Get monthly updates by subscribing to our newsletter! In your terminal, run the following command to create your app: This command creates your new Blazor app project and places it in a new directory called BlazorApp inside your current location. Microsoft Learn: Build a Blazor todo list app. The other (bl/r)azor page, LiveDemo.razor, will serve this purpose, for the sake of demonstration. You might notice that you are redirected to a new URL, having your (IBM Cloudant) username in it. Grace to Lottie, our web application will display exciting svg animations. I choose the name exploringblazor, as only lowercase characters are allowed, I have specified the options and I have confirmed with Create. I am going to generate some dummy data using simple class. The certificate will only be used for local development, and without it most browsers will complain about the security of the website. Let Jeff walk you through building a full Blazor app from start to finish: Browse through our documentation on Blazor to learn how to build awesome web apps. Take a look at the contents of your project using Solution Explorer. Define a parameter on the Counter component for specifying how much it increments with every button click: The following code shows how to achieve that. An Add New Item dialog box will open. Then we are going to change the main markup file, index.html, and to tune up the navigation, so it works after changes we have made so far. You will need an account for IBM Cloud in order to follow, as stated in prerequisites. When working with Cloudant and you POST data, usually in bulk, you must not provide a duplicate _id. The following view is located under /Pages/Index.cshtml.cs. At this point, again, we run the application. All contents are copyright of their authors. Someone from the .NET team will help you out. Good job! Nothing happens, not even a message with response status string, different than OK, is shown. So in this application, if we append /calculator to base URL then we will be redirected to this page. It will be working with Airbnb Lottie animation library. Visual Studio Code, available as a free download from MSDN, node.js, available as a free download from node.js website, We open the Developer Command Prompt for Visual Studio 2019. Usage of faker/bogus data generators is a good thing, but in our case, they will be slow and for our simple application, there is no need for them now. Here is how it looks. Those points are important, so play some time here, make sure everything is working, before moving forward. You can find the implementation of the Counter component at Counter.razor file located inside the Pages directory. If you're on a Mac with an Apple M1 chip, you need to install the Arm64 version of the SDK. Then, we click on the button. Lets understand this code. So, we type in our command prompt and get the server running. At the bottom of the page, we have a @functions section which contains all our business logic. You can stop the app at any time by selecting Ctrl+C. For example, if you have a slow fake data generator, you should see it immediately when generating the data, not when you save it. We have declared three variables, two to read the value from the user and another one to display the result. Several files were created to give you a simple Blazor app that is ready to run. This part assumes successful completion of Part 1 or a working application similar to it. If you are looking at a document via the Dashboard editor and click on it, it will display the document, a json file, in a browser. First, we are going to make a special component, so that we display multiple Lottie animations on a page with (relative) ease. Blazor makes web development easier and more productive by providing a full stack webdevelopment with .NET. This is the query for this, executed in Dashboard: We can limit the number of records returned, we can sort them, we can optimize the query execution, and we can do so many other things. Your guide to using ASP.NET Core Razor Pages. WebAssembly isdeveloped as a web standardand is supported by all the major browserswithout plugins. The Index.razor file already exists, and it was created when you ran the dotnet new command. We create a new file called demodata.json. The term WebAssembly refers to a binary instruction format for stack-based virtual machine. However, Razor Pages removes a lot of the unnecessary ceremony that comes with the ASP.NET implementation of MVC and is a simpler, and therefore more maintainable development experience. Let's go back to our browser and click the button again. Of course, if there are questions, I will try to answer them to my best knowledge. In our case, both processes should be quite fast. Razor Pages makes use of the popular C# programming language for server-side programming, and the easy-to-learn Razor templating syntax for embedding C# in HTML mark-up to generate content for browsers dynamically. WebAssembly is a binary format for the code in the browser, and it runs much faster than traditional JavaScript. Let's open the developer console tab of our browser and see the error there. Select the Blazor Server App template and select Next. It gives the browser several advantages, such as: The main advantage of WebAssembly is that it handles memory-rich jobs and multi-threading very well as compared to javascript. and if everything goes well, we should see the created data in our Cloudant database. :) And now, let's move forward. Here is the final version of Index.razor, the one seen in action in the animated gif as well: and this is the Home page in the browser: We have come to the final part of the article. In LiveData.cs, we will have an array of Persons, which are going to be shown. Each Razor Pages file found under the Pages directory equates to an endpoint. =(Convert.ToDouble(num1)+Convert.ToDouble(num2)).ToString(); =(Convert.ToDouble(num1)-Convert.ToDouble(num2)).ToString(); =(Convert.ToDouble(num1)*Convert.ToDouble(num2)).ToString(); =(Convert.ToDouble(num1)/Convert.ToDouble(num2)).ToString(); ASP.NET Core - CRUD Using Blazor And Entity Framework Core, CRUD Operations With ASP.NET Core Using Angular 5 And ADO.NET, ASP.NET Core - CRUD Using Angular 5 And Entity Framework Core, CRUD Operation With ASP.NET Core MVC Web App Using ADO.NET, CRUD Operation With ASP.NET Core MVC Using Visual Studio Code And ADO.NET, Why SharePoint Framework (SPFx) Is Best for SharePoint Development, Getting Started With Angular Electron Application Development, Basic Authentication For Azure Functions (Open API) .Net 6, Onion Architecture In ASP.NET Core 6 Web API, JWT Token Authentication In Angular 14 And .NET Core 6 Web API, Introducing Carbon - Google's New Programming Language. I am going to use few animations made by this artist - you can find his details on the following link, 'https://lottiefiles.com/Dahish'. We will refer to this part of site simply as Dashboard. In short, it makes C/C++, Rust, C#* run in a web browser. On later point, I will remove it, probably once I am ready with the making of this article. We might do this several times. You can consult the official documentation for getting more information on how to make queries against and the details involved there, as well as numerous articles around the web. We can create the REST, only the GET part actually, without express, but I guess it is a little bit easier the way I present it here. It is quite simple and matches the defined structure by the cloud database. So, first, we create a component for the animation only: We call the method for displaying the element in OnInitialized method. If you want a dynamic web site, that is one where the content is regularly being added to, you have a number of options available to you. Then, we continue with the main stuff for this part: You know, it is either -i or --install, you cannot just type something install something. By the way in (bl/r)azor file, you can see how to call a method with an argument and how to call it without, amongst other things. In Part 2, we will call external webAPIs. The SDK includes the runtime and command line tools for creating .NET Core applications. We are calling our business logic methods on button click. Razor Pages is the recommended framework for cross-platform server-side HTML generation. During our small manipulation, our Blazor web application was still running, we did not switch it off. Hence, we need to convert a string to double to perform our arithmetic operations. Now we will create a component, markup only, for displaying a single person. A default document appears, having an autogenerated identification key (_id). I hope someone finds this article interesting. Later, we type the domain we need, in my case localhost:44312. We can use this component directly in our LiveDemo page. I have used the SDK release. In very short, Blazor is C# for web browsers. For a production application, you will need a paid account with a plan tuned to your needs. For example, for all of the records I have generated and saved, I would like to have only those, having last name starting with "Tho", like Thomas or Thompson. We continue by updating Index.razor, so that we load one of our animations and just check that everything is working fine so far. Wait for the app to display that it's listening on http://localhost: and then open a browser and navigate to that address. We have also created a simple calculator application using Blazor and performed arithmetic operations on it. The article consists of three parts. If you choose to build your own, you can choose from a wide range of programming languages and frameworks. If you prefer, you can also get started with Blazor using the latest stable release of Visual Studio 2022 or you can use the command-line interface version of the tutorial. It compiles from a range of languages, i.e., .NET, C, C++, Java, Rust, etc. This is how the document looks just before we save it. Components within the underlying MVC framework still have their uses such as using controllers for building RESTful APIs. We can run the demo Blazor WebAssembly web application and go to Live Demo, type something and see properly formatted results with animations displayed for those records, which meet certain conditions. Lets explore what will happen when we call other service, hosted on another domain. Good job! Blazor is a framework from Microsoft for making web applications with .NET. Or you can build your own if you have an interest in, and an aptitude for programming. After Visual Studio 2022 Preview is installed and running, launch the Blazor tutorial from the welcome screen. We open a Node.js command prompt and we navigate to our working folder. Click on the Start Debugging button (green arrow) in the Debug Toolbar in Visual Studio to run your app. I will create more records, to increase their number and work with slightly more data. Follow the tutorial steps in Visual Studio to build your first Blazor app. Please refer to theattached source code for better understanding. You can use the certutil tool, installed with Windows, to verify the sha512 hash. This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL), General News Suggestion Question Bug Answer Joke Praise Rant Admin. In Part 3, we will work with JavaScript interoperability. Here is the screenshot made just before I click the Save to DB button for the first time. The performance of free account is same as the paid one. We are going to demonstrate the idea, because in following slightly more complicated examples, we need this working properly. After storage, we want to redirect the page to the OnGet handler of our page. In Part 3, our demo web application will use C# and JavaScript together, technically known as JavaScript interoperability. So, if you have an class in your C# solution, you have to play with this _id property - it should not be serialized when json is made, but it should be deserialized, because you will need to identify a document if you want to track it, change it, etc. Usually databases contain millions, and even more, records or documents. The default Blazor WebAssembly template comes with a server project and a demo controller, as well as demo class in Shared project. I have saved the file in D:\devdemos\BlazorFirstSteps\BlazorFirstSteps\Client\wwwroot\scripts under the name lottie.min.js. Razor Pages is a newer, simplified web application programming model. Once you've installed, open a new terminal and run the following command: If the installation succeeded, you should see an output similar to the following: If everything looks good, select the Continue button below to go to the next step. Architecturally, Razor Pages is an implementation of the MVC pattern and encourages separation of concerns. Redirecting is an essential part of web development, as it avoids the additional POST requests when we refresh a URL in our browser session. It's located in the Pages folder inside the BlazorApp directory that was created earlier. If there is a place, where you give up reading it and move to another reading, then this one is the best. One final thing before we start populating fake data. Start Visual Studio and select Create a new project. If you are a beginner, you will probably want to start with a framework and language that is easy to learn, well supported and robust. Depending on the status, good or bad, we should display different animations, one for good and another for bad (and none for neutral, maybe just some strings to emphasis the difference). If an update for Visual Studio 2022 is available, an, Find your Visual Studio 2022 installation and select the. Each time the Click me button is selected: Each of the .razor files defines a UI component that can be reused. In order to display more animations at once, we are going to use Blazor components. After you create those service credentials, you will be able to call your database using some of them. So, you can follow the instructions and create a Cloudant database from here. We learned about the new .NET framework Blazor. Running our application, we can see our functionality in action. Any Chromium based browser will display the same error. I am not familiar with this button syntax so might well have done something wrong. you should avoid posting screenshots of the code, they are sometimes not scaled correctly and it is annoying to read them in different sizes. It may be visibly collapsed under Index.cshtml. For our application, we will query the last name when at least 3 characters are typed. It is based on a page-centric development model, offering a familiarity to web developers with experience of other page-centric frameworks such as PHP, Classic ASP, Java Server Pages, ASP.NET Web Pages and ASP.NET Web Forms. Part of the ASP.NET Core web development framework from Microsoft, Razor Pages supports cross platform development and can be deployed to Windows, Unix and Mac operating systems. Having tile, card or component like that will allows us easily to display multiple of it on one row in Live demo page. (Reason: CORS header Access-Control-Allow-Origin missing). For easier work, we will create class for parsing the raw json response, received from Cloudant. More, I will create two enums, one for Status and one for Location, and the Person class. It might be a good thing to see the recent documentation, provided by Microsoft for exact string for typing the command for installing the Blazor WebAssembly template. When we put the data in Cloudant, we have used anonymous class, this is another approach too. Create, use, and modify a simple counter component. Or you can hire someone to build a suitable site for you. We have to add more documents to our database, even for a simple demo. Microsoft Visual Studio Community 2019, available as a free download from MSDN. The markup will be quite simple, kind of card or a tile, some strings displayed in one column, some other strings displayed below, same thing in next column and then the animation. It removes much of the ceremony of ASP.NET MVC by adopting a file-based routing approach. In both cases, learning C# as a language and ASP.NET Core as a framework will tick those boxes. Congrats! We click on Fetch data and on Counter and test them, just to see everything is working. Here is the index.html after our changes: It remains to show the Home page, screenshot is made after I have clicked twenty times on the button. Then, we open Visual Studio Code, then we open the folder we just created. Click on it to navigate to our. On the top, we are defining the route of this page using @page directive. Here is how, Finally, we simplify the layout of entire web application, changing the, We do similar steps and create another one, called, And here is the final look of our Blazor WebAssembly web application for the first part. So in short, our browser asked the server about CORS and did not like what the server told it. We have also defined four methods to handle addition, subtraction, multiplication, and division. This article is about Blazor, I place all those details about Cloudant in order that every reader, acknowledged with Cloudant or not, is able to follow the steps. You will need to create a service credentials. Install this extension and it will be added to your VS 2017. If you dont have .NET Core 3.1. 10-15 minutes + download/installation time. Pay attention that even that we use Debug, it is not actually (yet) possible to debug the C# in blazor @code part. We are going to run it via our node.js command prompt. IBM Cloud allows users to develop for free, to build for free on IBM Cloud. Right click on Pages folder and select Add >> New Item. It look like a human readable sentence line that, it is so easy to use :). .NET provides features such as speed, performance, security, scalability, and reliability in web development that makes full stack development easier. You can still choose to use ASP.NET Core MVC to build your ASP.NET Core web applications. JavaScript interoperability in Blazor is explained well in its documentation, blogs etc., so you can omit this part.