How to negate bool value inside blazor?

Question

I'm trying to do this

<MatCheckbox @bind-Value="@(!Checked)" Label="Checkbox"></MatCheckbox>

But it gives me the error

CS0131 The left-hand side of an assignment must be a variable, property or indexer

How can I pass a negated boolean value without creating another property?

I want to bind the value so it's !Checked

Flaring

Create a property called "Unchecked" that negates Checked and bind to that instead. – Causerie

How can I pass a negated boolean value without creating another property? – Flaring

Yes, but a bind expression is a property, I don't think you can. – Causerie

@Causerie now it's better explained, thanks – Flaring

@Causerie could you write that as an answer? – Flaring

Answer 1

As @DavidG said in the comments, you cannot bind a value, you need to bind a property, and !Checked returns a value, not a property.

So the only way to do this is by creating a negated property.

Flaring

Ideally you should have offered me to write up the answer rather than post yourself. Something to consider for next time. – Causerie

@Causerie please write it, and I erase my answer. – Flaring

It doesn't matter now, I'm just saying for future posts. – Causerie