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75 lines
2.9 KiB
75 lines
2.9 KiB
# Blazor UI: Toolbars
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The Toolbar system is used to define **toolbars** on the user interface. Modules (or your application) can add **items** to a toolbar, then the [theme](Theming.md) renders the toolbar on the **layout**.
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There is only one **standard toolbar** named "Main" (defined as a constant: `StandardToolbars.Main`). The [Basic Theme](Basic-Theme) renders the main toolbar as shown below:
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In the screenshot above, there are two items added to the main toolbar: Language switch component & user menu. You can add your own items here.
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## Example: Add a Notification Icon
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In this example, we will add a **notification (bell) icon** to the left of the language switch item. A item in the toolbar should be a **Razor Component**. So, first, create a new razor component in your project (the location of the component doesn't matter):
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The content of the `Notification.razor` is shown below:
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````html
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@inherits Volo.Abp.AspNetCore.Components.AbpComponentBase
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<div style="color: white; margin: 8px;">
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<i class="far fa-bell" @onclick="ShowNotifications"></i>
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</div>
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@code {
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private async Task ShowNotifications()
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{
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await Message.Info("TODO: Show notifications");
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}
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}
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````
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This sample simply shows a message. In real life, you probably want to call an HTTP API to get notifications and show on the UI.
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Now, we can create a class implementing the `IToolbarContributor` interface:
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````csharp
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using System.Threading.Tasks;
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using MyCompanyName.MyProjectName.Blazor.Components;
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using Volo.Abp.AspNetCore.Components.WebAssembly.Theming.Toolbars;
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namespace MyCompanyName.MyProjectName.Blazor
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{
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public class MyToolbarContributor : IToolbarContributor
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{
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public Task ConfigureToolbarAsync(IToolbarConfigurationContext context)
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{
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if (context.Toolbar.Name == StandardToolbars.Main)
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{
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context.Toolbar.Items.Insert(0, new ToolbarItem(typeof(Notification)));
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}
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return Task.CompletedTask;
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}
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}
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}
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````
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This class adds the `NotificationViewComponent` as the first item in the `Main` toolbar.
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Finally, you need to add this contributor to the `AbpToolbarOptions`, in the `ConfigureServices` of your [module](../../Module-Development-Basics.md):
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````csharp
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Configure<AbpToolbarOptions>(options =>
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{
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options.Contributors.Add(new MyToolbarContributor());
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});
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````
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That's all, you will see the notification icon on the toolbar when you run the application:
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## IToolbarManager
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`IToolbarManager` is used to render the toolbar. It returns the toolbar items by a toolbar name. This is generally used by the [themes](Theming.md) to render the toolbar on the layout. |