public Action<int> OnMultipleOfTwoAction { get;set; } [Parameter] public EventCallback<int> OnMultipleOfThree { get;set; } private async TaskIncrementCount { currentCount++; if(currentCount % 2 == 0) OnMultipleOfTwoAction?.Invoke(currentCount); if(currentCount % 3 == 0) await OnMulti...
在父组件中,定义一个方法,该方法接受一个MethodDelegate类型的参数,并将方法名传递给该委托。例如: 代码语言:txt 复制 public void InvokeMethod(MethodDelegate methodDelegate, string methodName) { methodDelegate.Invoke(methodName); } 在父组件的渲染逻辑中,使用DynamicComponent来动态生成子组件...
(Avoids Rerender)@code {privateDateTime dt = DateTime.Now;privatevoidHandleSelect(){ dt = DateTime.Now; Logger.LogInformation("This event handler doesn't trigger a rerender."); }Task IHandleEvent.HandleEventAsync(EventCallbackWorkItem callback,object? arg)=> callback.InvokeAsync(arg);} 除了...
(Avoids Rerender)@code {privateDateTime dt = DateTime.Now;privatevoidHandleSelect(){ dt = DateTime.Now; Logger.LogInformation("This event handler doesn't trigger a rerender."); }Task IHandleEvent.HandleEventAsync(EventCallbackWorkItem callback,object? arg)=> callback.InvokeAsync(arg);} 除了...
MyComponent.SomeEvent -= MyMethodToCall; 1. 2. 3. 4. 5. 6. 7. 类与结构 .NET 事件(委托)是类,而 Blazor EventCallback<T> 是只读结构。与 .NET 委托不同,EventCallback<T> 不能为 null,因此在发出事件时无需进行任何 null 检查。
.NET 热重载技术支持将代码更改（包括对样式表的更改）实时应用到正在运行的程序中，不需要重启应用，也...
//Define event[Parameter]publicEventCallback<int> CurrentCountChanged {get;set; }//Call eventawaitCurrentCountChanged.InvokeAsync(CurrentCount);//bind event<component @bind-CurrentCount:event="事件名称"></component> if you require multiple listeners, you can useAction<T>. Otherwise, it would be...
在视图层,定义一件按钮事件来触发“调用JS”的C#方法: 在逻辑层定义“调用JS”的C#方法,在方法调用JS:int a = await JS.InvokeAsync<int>("MyApp.simpleSum",2,3) //MyApp.jsvarMyApp = MyApp ||{}; MyApp.simpleSum=function (a, b) {returna...
void TrySelect(TypeAheadItem item) { _isOpen = false; SelectedText = item.DisplayText; SelectedValue = item.Value; OnSelectionMade?.Invoke(item); } The method receives the TypeAheadItem object associated with the clicked element. Next, it cl...
TheRendermethod callsRenderHandle.Renderon theRenderHandlethe component received when it was attached to the render tree. (RenderHandle的)Render方法将RenderComponent方法作为一个委托(一个RenderFramgment委托)进行传递,调用Render会将传入的RenderFragment委托放到Renderer的渲染队列上。我们查看RenderHandle会发现...