Blazor how to pass arguments to onclick function?

问题

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?

回答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++)
{
    <button @onclick="@(e => test(i, 5 * i))">Check</button>
}

回答2:

Ampersand on onclick specifies it's a C# function:

@onclick = "@(() => test(i, 5*i))"

来源：https://stackoverflow.com/questions/54297711/blazor-how-to-pass-arguments-to-onclick-function