从Blazor中的生成的按钮调用函数

I'm currently trying to call a method from some autogenerated buttons, that are set up from some configuration. So the number of buttons is configurable. I have the blazor page as shown below. My problem is that if I have 3 buttons and I press one then ButtonClicked is called correctly, but the index is always 3 - the end value of int i for the for-statement. I of course want the index of the button to be passed to the function. One obvious solution would be to wrap a button in my own component that would then take an index-parameter and this could be passed along to a buttonclicked event, but how can I make the code below work without making my own button component?@inject Navigator navigator<div class="chooseDiv"> @for (int i = 0; i < Buttons.Count; i++) { <button type="button" class="btn btn-primary btn-lg" style="margin:10px" onclick="@((ui) => ButtonClicked(i))">@Buttons[i]</button> }</div>@functions { [Parameter] List<string> Buttons { get; set; } = new List<string>() { "You forgot to declare your buttons" }; private void ButtonClicked(int index) { Console.WriteLine("Button clicked with index:" + index); navigator.CurrentResult = index; navigator.Next(); }}推荐答案我想您应该按如下所示将局部变量添加到循环中:I guess you should add a local variable to your loop as follows:@for (int i = 0; i < Buttons.Count; i++) { var local = i; <button type="button" class="btn btn-primary btn-lg" style="margin:10px" onclick="@((ui) => ButtonClicked(local))">@Buttons[i]</button> }这是标准的C#行为，与Blazor无关，在该行为中，lambda表达式@((ui) => ButtonClicked(i))可以访问变量而不是其值.您必须定义一个局部于循环的变量，否则您的lambda表达式将始终调用ButtonClicked(i)，并且在循环结束时我等于3.This is a standard C# behavior, not related to Blazor, where the lambda expression @((ui) => ButtonClicked(i)) has access to a variable and not to its value. You've got to define a variable which is local to your loop, otherwise your lambda expression always calls ButtonClicked(i) and i equals 3 when the loop ends.希望这对您有帮助... Hope this helps... 这篇关于从Blazor中的生成的按钮调用函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！