Blazor page load events. However, this is no longer happening for me using .
- Blazor page load events. For an Example component in an Example.
- Blazor page load events. Jan 20, 2024 · 0. The following component handles a location changed event by subscribing to NavigationManager. bUnit is an example of a library that enables Razor component unit testing. Aug 17, 2021 · It pushes a RenderFragment onto the Renderer 's queue. razor) <Component ParentPage=this/>. OnParametersSet. Don't declare an event handler like this async void UiEvent(). When authenticating users with Microsoft. Provide details and share your research! But avoid …. Handling events from multiple elements is a key aspect of creating responsive and interactive Blazor applications. razor file, with one or more specified routes. The following image shows different parts of the razor page: Image 1: Sample Blazor component. cshtml, which calls the lifecycle methods for the first time: @(await Html. int x = 10; } write this and put a break-point on int x = 10; watch sender and e. Dec 8, 2020 · 8. OnParametersSetAsync will be called for each parameter change, it is called at least once. NET and JavaScript (JS) code. This can be injected into a Blazor component using @inject in a razor file, or the [Inject] attribute in a CS file. JSInterop NuGet package) provides abstractions and features for interop between . It works as expected. I ended up doing it as follows. Blazor is a single-page app framework for building interactive web apps with . There's a lot that goes into memory when blazor components load into the memory. My understanding is that this is so most of your page will load even if it's waiting for async data to get filled in (complex database search etc. User2 is on the same page as User1 and selects some elements and he/she is pressing save before User1. NET Core (latest, blazor), when/how to call an action every time a user is authenticated? Even if they come back to the app and have an active session. NET and C# instead of JavaScript. In the current version of Blazor, you can access most of the DOM events with the HTML element. Authentication, in a Blazor Webassembly application on the client side app that is hosted on ASP. About. There are a few ways to do it: The ugliest: If you have two templates you can simply select the template you want to use with the following on the top of the page/component: @layout NoFooterLayoutName. I have this class which implements Quartz's . razor and App. during this initial load - some interactive elements on the page seem to be inactive. OnInitializedAsync. Pages/Index. You can also find related questions and answers about Blazor select dropdown binding, filtering, and updating in the same page. css file. Blazor Server is served side, and I can handle DOM events with my C# code at server side still it makes sense to add a pure client side javascript event handler and surprisingly it seems it is not possible, because _framework/blazor. Conclusion. edited Oct 31, 2023 at 18:01. Blazor components render their template whenever state has changed and sometimes you need to invoke some code after rendering has completed. I therefore tried to place a code block in MainLayout. InvokeAsync<WindowDimension>("getWindowDimensions"); WindowWidth = dimension. please feel Sep 18, 2021 · If you change value of text-box, it calls onchange event. The value of the attribute is treated as an event handler. In Startup. Page events. Count) (Which is the last index of the table, the last value of index). server. I want to use this div like following. parameters specifies component parameters to pass to the Jul 12, 2020 · Note: Since a Blazor Server app is usually prerendering, JavaScript is not yet available, so you have to wait until your app is rendered, and only then call JavaScript functions. Feb 9, 2024 · Triggering of event handlers and life cycle methods. This results in the user who instanciated the event to crash as expected. /Forecast /Counter etc) Fixing the base project. I posted an answer on getting the window width with event listeners, which is very similar to what I think you need here. Feb 9, 2024 · Enable CSS isolation. Blazor University - Browser DOM events. If it's async, then it's async Task UiEvent(). cs within the ConfigureServices() method, add the following line: services. For the example in this section: Obtain three images from any source or right-click each of the following images to save them locally. Dec 3, 2021 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. The enhancement avoids the need to fully load the page and provides a much smoother user experience, similar to a single-page app (SPA), although the component is Feb 9, 2024 · In this article. js: document. Access to browser navigation from Blazor is provided via the NavigationManager service. Jan 20, 2021 · By introducing the field _size with the Property Size, you can bind against and the setter of Size will call CalculateStandardDimensions(). NET 8, focusing on page refreshes, data loading, and interactive rendering. *. razor: Sep 24, 2019 · From the result we can see that, the component is loaded twice. // My Parent Page (ParentPage. To do so, add the following code in your MainLayout. LocationChanged is an event that is triggered whenever the URL in the browser is altered. cshtml 出现一个错误 Index. answered Apr 30, 2013 at 7:35. Introduction. If forceLoad is true: Client-side routing is bypassed. Aug 6, 2021 · return {. Dec 28, 2019 · foreach (FieldInfo info in infos) ret. Blazor uses Blazor circuits for maintaining information about user and scoped services. addEventListener('onkeypress', function (e) { DotNet. Place the images in a new folder named images in the app's web Apr 13, 2021 · Blazor renders in multiple passes, and what you're experiencing is absolutely normal. The . Setting up event handlers. For which i need to change the Filter function as follows. Consider: Initialise => async load the data=> render with some info about loading => Finish loading the data => render with real data. Name the images image1. razor is loaded into the page next to the menu. 03125m. Can be nested and reused. Asking for help, clarification, or responding to other answers. Afterwards, we will create a button. AspNetCore. For custom events, you will need to manually utilize JavaScript/. Ahead-of-time (AOT) compilation. AsQueryable(); May 3, 2023 · When the user clicks the link to view the ‘Alice Krige’ contact the browser will attempt to navigate to /contacts/1. Wrap the instance in a DotNetObjectReference instance and call Create on the DotNetObjectReference instance. The query string lets OrderBrowser. We start with adding a button click event, and for this, we are going to use a textarea to bind a value to a property. net 7 I can do this in a Page. However, Blazor will intercept this navigation and, rather then reload the entire site, simply re-render this same component with the new parameter values. Oct 29, 2023 · d15e - WeatherList => OnAfterRenderAsync Completed. NET MAUI Blazor project template. You can override the OnAfterRenderAsync or OnAfterRender method to run code when rendering of the component has completed. 0 with Blazor on a server side implementation. NET assemblies that: Define flexible UI rendering logic. Nov 1, 2023 · The EventCallback type provides a simple API for communication between child and parent components in Blazor applications. razor page. NET C# classes built into . Oct 12, 2022 · There are eight methods that come under this component life cycle. Nov 24, 2023 · FlutesPerFoot = 90, Thickness = 0. For instance, you may often need to show a loading indicator while loading data from a database or a remote service, or while processing a form. echiang written 3 years ago. A component in Blazor is an element of UI, such as a page, dialog, or data entry form. After the server connection has been established. public string message { get; set; } private async Task SendMessage() message = "Hello"; When you click the button it outputs "Hello" on the page. Count; index++) . For more information, see the Enhanced navigation and form handling section. Jan 28, 2024 · In this article, we will discuss how to build a Blazor Web App using . I basically want to execute getAvailablePrinters when the page is loaded. To match the look and feel of the spinner with your application pages, you can change the css properties accordingly in the spinner class. Minimize app download size. Edit. png, image2. When the user clicks a tag (RadzenPanelMenuItem), the component OrderBrowser. RenderComponentAsync<App>(RenderMode Sep 18, 2020 · This allows us to change and inject different parameters at runtime. The trick is to use HttpUtility. What I want to do is this: User1 is on Page a and selects some elements. Blazor Page Lifecycle. NET Master and Content Pages) Copying incase link goes dead: The following is the sequence in which events occur when a master page is merged with a content page: Content page PreInit event. Though, you may not want to run code every time the component has Otherwise, Blazor performs a full-page reload for the requested URL. Feb 23, 2021 · I need to add an @onclick event to each cell, the problem is that de arguments of that function are changing with the for loop. js ), where the * placeholder is: server for a Blazor Server app. Sep 28, 2021 · 1. in fact all blazor components just a razor component with an extension of . Events represent things that have taken place - for example an application page is loaded, the user clicks a button or selects a dropdown item. DOM events in a Blazor application can be handled in Dec 23, 2021 · I have a Blazor component named NavBar. Add(info. At this stage you could programmatically optimize loading of images and CSS Feb 22, 2024 · Add an HTML button element with an @onclick event handler to open the content page. 0625m. Empty; Mar 1, 2024 · Receiving a call from something external to the Blazor rendering and event handling system. Optimize rendering speed. There are 8 methods which decide the lifecycle of a component. Feedback. NET MAUI app, and pointed to the root of the Blazor app. 2. May 18, 2021 · 11. Jun 9, 2023 · OnInitializedAsync is only called once (per component/page). In this article. The LoadData method is called by the OnInitialized() event and populates a List<T> (in this case, a list of ProjectModels). We are using CSS animations to get the effect of a loading spinner. the method I am trying to do is in my @code{} block of the razor page. Initialize Blazor when the document is ready. Assertions that component behavior is correct. Parameters that were passed into the Component life cycle. Jul 31, 2021 · Loaded means after rendered. If I place the exact same method in Index. net 8 in a "Blazor Web App" (Auto, Server mixed with Web Assembly) in a Page. But unless something has been added, dotTrace is useless to tell me how long each DB query is taking. EventCallback btn_clicked => EventCallback. Examples of user state held in a circuit include: The hierarchy of component instances and their most recent render output in the rendered UI. Place the images in a new folder named images in the app's web Dec 12, 2019 · a blazor page is actually a blazor component starts with @page directive. For example to change the spinner color to Red, set border-top property to 16px solid Jan 20, 2024 · Keep event-handling logic organized in separate methods for clarity and maintainability. Jan 12, 2023 · If the OnInitialized{Async} lifecycle method for initializing the component is present, the method is executed twice: When the component is prerendered statically. There are two render events. Jul 27, 2021 at 14:12. GetValue(instance). 2. Page events are visible in the Radzen Mar 1, 2024 · Server-side Blazor is a stateful app framework. NET interoperability. Chain to the Promise that results from a manual start. So you'd need to go through jsinterop. WebAssembly. In blazor, you can use a predefined div with spinner class to do this. razor know what tag was selected. You can override OnAfterRenderAsync Blazor method on your MainLayout. blazor on the server side, this button Perform custom data-binding. Every cell will do onclick (amounts. NET IJobListener interface: public class GlobalJobListener : IJobLis Dec 2, 2019 · Such ineffective no longer should need to load the event in the child page _Host. The Blazor page load event is a powerful event that can be used to perform a variety of tasks, such as: Initializing data. Event callbacks complete the communication circle between Blazor Detecting navigation events. Jul 9, 2021 · Adding a button onclick event. The following diagram outlines the flow of these lifecycle methods. Dec 31, 2021 · I wanted to avoid the overridden NavigateTo with forceLoad set to true due to reloading the session and flickering the page. Let’s start from the beginning by getting to know the architecture of the Blazor page, then learn various synchronous and asynchronous methods. The following example is based on the Index component in the . }, new Flute. razor 出现Object reference not set to an instance of an object. Page_Load () method is called after a preLoad event. Jul 1, 2020 · Depending on the network this can be fast or take a few seconds. Dec 2, 2023 · 1. UI Event Handlers are not fire-and-forget. protected override async Task OnInitializedAsync() Dec 29, 2023 · as part of initial page load - a WebSocket connection is established which takes a bit of time. Apr 13, 2022 · In Blazor, each page in the app is a component, typically defined in a . The current version of Blazor provides pretty rich event handling. razor that displays a Radzen navigation menu with a list of tags. Jun 27, 2020 · A component's lifecycle methods and any event callbacks that are raised by Blazor are executed on the synchronization context. However, this is no longer happening for me using . Invoke of my event. For example your JsInterop. You may want to show a loading screen while initializing the application. razor file for the component in the same folder. Still, it provides a lot of room for custom code and is very flexible and extensible. razor. So that means that if I do it like this (see below). Blazor is optimized for high performance in most realistic application UI scenarios. public void StateHasChanged() {. This method is executed whenever the parent renders. razor file, create a file alongside the component named Example. Just adding the @rendermode Auto directive improves the startup time heavily. The data volume is large, therefore I only fetch the top 100 rows from SQL (meant as a preview). For example, DynamicComponent can render a component based on a user selection from a dropdown list. The post was this. I'm new to Blazor (Server), and thanks to the accepted answer, I was able to resolve a similar problem I had, where I wanted a component to trigger a re-render of the parent page. Blazor components that renders Overlays for the whole page on load or for specific element on custom event. Show 6 more. If RefreshDataAsync is invoked from a Blazor event handler or component lifecycle method, triggering a render isn't required because a render is automatically triggered at the end of the event handler or lifecycle method. For the location of the script, see ASP. Mar 27, 2024 · Blazor enhances page navigation and form handling by intercepting the request in order to apply the response to the existing DOM, preserving as much of the rendered form as possible. Nov 30, 2020 · Blazor Page Lifecycle. Leverage component parameters to pass data and context information to event handlers efficiently. All components work with WebAssembly and Server hosted models . For example, we have used the @onclick Directive in many samples elsewhere: <button @onclick=ButtonClicked>Click me</button> Blazor components have a number of virtual methods we can override to affect the behavior of our application. The first time it was loaded as a simple Mvc component directly when the page is requested and handled by /_Host which must be specified with the following code in _Host. Circuits have lifetime events and it is possible to register event handlers for them. Also HTML button with customizable content for showing async operation in progress/loading state. To avoid this double-rendering behavior in a Blazor Server app, pass in an identifier to cache the state during prerendering and to Mar 27, 2020 · So I am trying to execute a method when the page has loaded. Width; So every time the page reload we know the width of the window. @for (int index = 1; index < amounts. var query = dbContext. png, and image3. Set the Data and Count properties. Following is Razor syntax to define the event in the Blazor component, @ on This guide demonstrates how to handle page and component events in Radzen Blazor applications. 0. Place the following CSS in wwwroot/css/site. The generic EventCallback<T> type allows us to provide context information when firing the event. So how can I measure that? Jun 17, 2020 · Event Listeners - Keep in mind that loading of the page has more, than one event: "DOMContentLoaded" This event is fired when the initial HTML document has been completely loaded and parsed, without waiting for style sheets, images, and subframes to finish loading. LocationChanged. The "Page" property is to create the url for the page (ex. With Page_Load () you can set default values or check for postBacks etc. js swallows them Jul 22, 2016 · The content page load event will fire before the master page load event. Can be shared and distributed as Razor class libraries or NuGet packages. These methods are executed at different times during a component's lifetime. css file is a scoped CSS file. The solution was simply an empty page that took a url as a parameter while immediately redirecting. UrlEncode when setting the Nov 21, 2022 · This query runs for 18 seconds. Sep 22, 2021 · I want to run a lifecycle event during Blazor WebAssembly app initial load. css. Blazor Server's synchronization context attempts to emulate a single-threaded environment so that it closely matches the WebAssembly model in the browser, which is single threaded. as requested my code below: Apr 2, 2024 · This article explains how to load JavaScript (JS) in a Blazor Web App with static server-side rendering (static SSR) and enhanced navigation. Therefore, prerendering doesn't occur for internal page requests. webassembly for a Blazor WebAssembly app. Use Component Parameters. The solution to everything in Blazor is to create a component! In this case, the component will load the data asynchronously and display a loading message meanwhile. Here’s the Blazor components lifecycle: All Page Load Events Blazor Loading and Overlay Components. Mar 1, 2024 · The Blazor startup process is automatic and asynchronous via the Blazor script ( blazor. Blazor provides a simple yet powerful implementation of both out of the box. If you place mouse cursor out, it calls onblue event. This Loading component is very basic and simple to create, but so Jun 2, 2023 · It only supports onclick and onchange events. CircuitHandler will handle the following events: OnCircuitOpenedAsync; OnConnectionUpAsync Dec 9, 2022 · The AsyncEventHandler allows me to await . NET instance by reference to JavaScript: Make a static call to DotNetObjectReference. 6 contributors. protected void Page_Load(object sender, EventArgs e) {. blazor reports these steps: it seems it would be a good idea to display some sort Feb 2, 2023 · We are wanting to monitor our Blazor web pages to get an idea of page load times. }); the page loads the data from local cosmos. Components are . IsLoading = true; await FetchFromDb(); IsLoading = false; But I figured, that the whole process of changing Oct 30, 2020 · I am having trouble to understand how can I subscribe to an event in a Blazor page. ) Internal navigation for interactive routing in Blazor Web Apps doesn't involve requesting new page content from the server. E2E testing: A test runner runs a Blazor app containing the CUT and automates a browser instance. ComponentBase only knows about its own lifecycle methods and Blazor-triggered events. This is a normal common scenario. ) There are two ways I've used to avoid throwing a null reference on async init: 1. Because the Id parameter is set to 1 the details for user 1 will be Jul 23, 2020 · According to Blazor docs you can subscribe to LocationChanged event. However, in . Employees. See Henk's diagram below. It should also not take the user to a separate page to edit it (if possible, I'd love to have it inline in the table). NET process and render web UI to an embedded web view control. png. Mar 1, 2024 · RefreshDataAsync updates a Virtualize<TItem> component's data without causing a rerender. You can do it anywhere where you can get a reference of NavigationManager. <RadzenDataGrid Count="@count" Data="@employees". Handle those using pure Javascript, and call a Blazor method after some sensible completion-- the mouse button has been released, or a certain delay time has passed, etc. Let's take a deep dive to understand how they communicate to make components alive. Mar 24, 2022 · However, I strongly recommend you NOT handle events that could fire very frequently, like mouse position changes or window size changes, with constant calls back to Blazor. See here for full order (MSDN: Events in ASP. }; Then on your page where you want to read the screen width you need to read this function: var dimension = await JSRuntime. It helps us write concise, readable, and maintainable code. The browser first makes a request to the root address of the app. The browser is forced to load the new page from the server, whether or not the URI is normally handled by the client-side interactive router. If you not change value of text-box, just place mouse cursor into text-box, then go out, only event onblur called. In the following example: componentType specifies the type. OnInitialized. So i want to show loading spinner. Aug 6, 2019 · The HTML page previously would render before/while the "@code" portion of the Blazor page is running (the "Loading" message that is in the default project) on the client side implementation of Blazor in . How does the Blazor Page Load Event work? The Blazor page load event is triggered by the `OnAfterRender` lifecycle hook. Oct 7, 2020 · Blazor allows writing components to encapsulate common behaviors. Nov 22, 2023 · In Blazor Server in . We are using client based Blazor. Routing mostly happens client-side without involving a specific server request. Redirecting the user to a different page. DOM events are generated as a result of actions taken by a user in the course of interacting with a browser-based application. Pages have one event - the Load event. Perhaps add a event listener to the document using JsInterop and assign a anonymus function to the event which calls your C# method with the even parameters. invokeMethodAsync('Snake', 'OnKeyPress', serializeEvent(e)) }); Jun 18, 2020 · with your solution i am getting "The name onclick does not exist in the current context", and for the function name its complaining "Missing attribute name" Note: I am calling function in the code behind file C# , not in the razor page itself Sep 24, 2019 · In my Blazor. razor it works fine when I load the page / . LetterGrade = 'F', FlutesPerFoot = 125, Thickness = 0. Apr 11, 2024 · The @microsoft/dotnet-js-interop package ( npmjs. For an Example component in an Example. This means it also works when reloading the current page. then as soon as it loads and renders, the very next millisecond, it clears the view and goes back to as if I just navigated to it. The BlazorWebView control can be added to any page of a . AddScoped<INotificationService, NotificationService>(); I then inject the service into the component I want to subscribe to the OnChange() event; @inject INotificationService NotificationService. Actions that generate DOM events include clicking on a button, changing the value of a form input or pressing a key on a keyboard. blazor: @message. The above documented sequence demonstrates that there is no way you can set a flag in FetchData that shows a Loading message that you can guarantee will not complete before sub-components start and run their OnInitialized sequences. Check for null. The event handler method is named OpenPage. innerWidth, height: window. You have full control of the binding, and inconsistency is avoided. Handle the LoadData event and update the Data and Count backing fields ( employees and count in this case). this is not a problem on its own but a bit confusing from the user UI stand-point. width: window. This is the 'normal' event to load data. Factory. 1. NET Core Blazor project structure. Blazor apps are based on components. To do that, extend the CircuitHandler class and register it using DI. You can also use a loading component to indicate any long operation. To manually start Blazor: Blazor Web App: Add an autostart="false Component events. Blazor can run on the server or in the browser using WebAssembly. NET Core 3. void LoadData(LoadDataArgs args) {. When rendering any mark-up, it is possible to assign standard JavaScript events on the rendered HTML elements so that our own Blazor C# methods are executed. Net Core 2. You don't have to do anything special. Mar 1, 2024 · 03/01/2024. Sep 24, 2020 · Install the NuGet package BlazorApplicationInsights to your Blazor server-side project. I figured it out: . Optimize JavaScript interop speed. This essentially means, that on the initial page load @rendermode InteractiveServer and on every susbequent load @rendermode InteractiveClient is used. Components. We don’t have to select one of the multiple options for routing; it’s all included in Blazor. Once a public property of type EventCallback<T> has been declared and decorated with the [Parameter] attribute, consuming components can specify Sep 26, 2019 · First, create an event call back for your Test. Most of the time, the app maintains a connection to the server. Master page controls Init event. ToString()); return ret; This component should allow me to pass a class in as a parameter, and then edit it's fields. Feb 15, 2023 · Razor Component DOM Event Handling. If you need the window specifically, I don't think there's an option for that in blazor natively. – Joon w K. ComponentBase doesn't know about other events that may occur in code. Apr 5, 2024 · A DynamicComponent is useful for rendering components without iterating through possible types or using conditional logic. The LocationChanged event. Based on the event of the binding onInput or onChange you can control the time of the write back. I was hoping for something like starting a stopwatch on a begin event and stopping it on a loaded event, but this Feb 19, 2020 · For those of us using a 3rd party control, the provider should have an equivalent element reference to make Alexandre's answer work (DotNet5 and up) Jan 8, 2024 · These apps, known as Blazor Hybrid apps, enable a Blazor web app to be integrated with platform features and UI controls. com) ( Microsoft. Once the data is loaded, it replaces the How to use the onchange event with a select dropdown in Blazor? This question on Stack Overflow provides a detailed example and a possible solution using the @bind-value attribute. Jun 21, 2021 · I have a Blazor component that displays data from SQL in an unordered list. Life Cycle events. Browser DOM events. The OnAfterRender() override method is too early in my case. In the event handler, call PushAsync to push the ContentPage, NavigationExample, onto the navigation stack. For example, any C# events raised by a custom data store are unknown to Blazor. Create(this, Test); Or, to make sure you only create this object once, you can use the following: EventCallback _btn_clicked = EventCallback. css file matching the name of the . Client I resolved INotificationService in ConfigureServices as follows; services. innerHeight. However, the best performance depends on developers adopting the correct patterns and features. Using the Instance Method Call method: Pass the . md file. This article explains Blazor app startup configuration. The testing tool inspects and interacts with the CUT through the browser. When using Blazor's enhanced navigation feature, which allows the user to avoid reloading the entire page, page Blazor Loading and Overlay Components. A root Router component in the Blazor app then handles intercepting navigation Apr 30, 2013 · Refer to page life cycle. How to use the onchange event with a select dropdown in Blazor? This question on Stack Overflow provides a detailed example and a possible solution using the @bind-value attribute. Aug 17, 2020 · Conclusion. Check the FetchData page in the starter templates. Once the component was setup and the other project containing the componentservice I had to modify the base Blazor project to take advantage of these changes. Create. For more information, see the GitHub repository's README. The EventCallback<T> class is a special Blazor class that can be exposed as a Parameter so that components can easily notify consumers when something of interest has occurred. AddBlazorApplicationInsights(); You may want to augment the setup to reflect a custom role and instance value. Net 8 solved the problem by introducing a new rendermode called Auto. Reference source is available in the dotnet/aspnetcore GitHub repository ( /src/JSInterop folder). Some apps depend on JS to perform initialization tasks that are specific to each page. To define component-specific styles, create a . If there was no database queries I would just fire up the dotTrace profiler, start it, and keep clicking the link on my page to keep going to that page 20 or so times. It's not perfect, but it's close. razor but the method is never called. so, when you use url to redirect page by url you should override the OnParameterSet() or OnParameterSetAsync() that is my understanding as a conclusion of my blazor experience. The user's state is held in the server's memory in a circuit. We will use button binding to a call method that adds the note to a list, and removes the textarea value. Startup process and configuration. Jul 6, 2020 · 8. I know that this can be done with Google Analytics and Raygun but am looking for something more in C# or Javascript. UI Event handlers need to yield to give the Renderer thread time to run its render queue. Loading components. JavaScript initializers. Handle user events. If the app adopts interactive routing, perform a full page reload for component examples that demonstrate prerendering behavior. (See the OnInitializedAsync method below. Use cascading value in the template ( What I would recommend for your scenerio): <CascadingValue Value="Footer">. I experiment in my computer with Visual Studio 2021 preview, it always go to inside also 2 break Oct 19, 2023 · Routing and navigation are fundamentals when working with single-page applications. The following example demonstrates how to dynamically set an image's source with a C# field. Note also that the code above check if this is the first time the app is renderedthis is the place where you should initialize your JavaScript object. The Razor components run natively in the . km lv wa mg kd sc th dw bz lh