Patrik Svensson @patriksvensson@mstdn.social
Public

Do I know any Blazor experts here?

If I click the "MyComponent" button below, I get an error: "The render handle is not yet assigned." However, if I first click the "Click me" button, and THEN the "MyComponent" button, it will work as expected.

HOWEVER, if I change the method group invocation in the @onClick handler to a lambda, i.e, "() => _myComponentRef.ShowComponent()" everything will always work.

Does anyone know why this happens?

Blazor code: @page "/counter" @rendermode InteractiveServer <PageTitle>Counter</PageTitle> <h1>Counter</h1> <p role="status">Current count: @_currentCount</p> <button class="btn btn-primary" @onclick="IncrementCount">Click me</button> <button class="btn btn-primary" @onclick="_myComponentRef.ShowComponent">MyComponent</button> <MyComponent @ref="_myComponentRef"></MyComponent> @code { private int _currentCount = 0; private MyComponent _myComponentRef = null!; private void IncrementCount() { _currentCount++; } protected override void OnInitialized() { _myComponentRef = new MyComponent(); base.OnInitialized(); } }Blazor code: @if (Show) { <h3>MyComponent</h3> } @code { public bool Show { get; set; } public void ShowComponent() { Show = true; } }
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