Blazor how to pass arguments to onclick function?

Question

I'd want to make button onclick function that takes some input.

<button onclick="@test(123, 456)">Check</button>  @functions {     public void test(int a, int b)     {         Console.WriteLine(a + b);     } } 

But for some reason it throws an error:

Argument "1": Cannot convert from void to string

Later I'd want to create those buttons in for loop like

@for (int i = 0; i < 10; i++) {     <button onclick="@test(i, 5 * i)">Check</button> } 

How can I achieve that?

Answer 1

Try it with a lambda. You're binding the onclick to the result of the function rather than the function itself.

@for (int i = 0; i < 10; i++) {     var buttonNumber = i;     <button @onclick="@(e => test(buttonNumber, 5 * buttonNumber))">Check</button> } 

Answer 2

I try this and worked

@onclick="(() => FunctionName(argument))" 

like

@onclick="(() => GetDetail(item.UserId))" 

Got idea from https://github.com/aspnet/AspNetCore/issues/15956 .