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[Blazor] Calling .NET from JS - explanation of scenarios for DotNetObjectReference and instance methods (#33910)

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Robert Haken 2024-10-24 01:20:50 +02:00 committed by GitHub
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aspnetcore/blazor/javascript-interoperability/call-dotnet-from-javascript.md
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@ -1169,14 +1169,14 @@ In the preceding example:
## Component instance .NET method helper class
A helper class can invoke a .NET instance method as an <xref:System.Action>. Helper classes are useful in the following scenarios:
A helper class can invoke a .NET instance method as an <xref:System.Action>. Helper classes are useful in scenarios where using static .NET methods aren't applicable:
* When several components of the same type are rendered on the same page.
* In server-side apps with multiple users concurrently using the same component.
In the following example:
* The component contains several `ListItem1` components, which is a shared component in the app's `Shared` folder.
* The component contains several `ListItem1` components.
* Each `ListItem1` component is composed of a message and a button.
* When a `ListItem1` component button is selected, that `ListItem1`'s `UpdateMessage` method changes the list item text and hides the button.
@ -1345,7 +1345,7 @@ The assignment of a <xref:Microsoft.JSInterop.DotNetObjectReference> to a proper
* In the component's [`OnAfterRender{Async}` method](xref:blazor/components/lifecycle#after-component-render-onafterrenderasync), a JavaScript (JS) function is invoked with the element reference and the component instance as a <xref:Microsoft.JSInterop.DotNetObjectReference>. The JS function attaches the <xref:Microsoft.JSInterop.DotNetObjectReference> to the element in a property.
* When an element event is invoked in JS (for example, `onclick`), the element's attached <xref:Microsoft.JSInterop.DotNetObjectReference> is used to call a .NET method.
Similar to the approach described in the [Component instance .NET method helper class](#component-instance-net-method-helper-class) section, this approach is useful in the following scenarios:
Similar to the approach described in the [Component instance .NET method helper class](#component-instance-net-method-helper-class) section, this approach is useful in scenarios where using static .NET methods aren't applicable:
* When several components of the same type are rendered on the same page.
* In server-side apps with multiple users concurrently using the same component.