C#•3y ago

❔ How to set relative properties ?

SelectedCallingCode.CallingCode: +31 PhoneNumber: 123456 FullPhoneNumber: +31 123456 Are these syntaxsyntaxes correct on the FullPhoneNumber ?

16 Replies

Pobiega•3y ago

not really, no. You are declaring it a normal getter and setter, but its actually a "calculated" property that only uses other props to get its value the setter doesnt use value, as you can see You'll need to raise PropertyChanged events for FullPhoneNumber in the other setters but have it declared simply as public string FullPhoneNumber => $"{SelectedCallingCode?.CallingCode} {PhoneNumber}";

TotechsStrypperOP•3y ago

Can you make this with a + in it ? "+"

Pobiega•3y ago

ofc just add the +

TotechsStrypperOP•3y ago

okay oh shoot I forgot these are really from my boss These props suppose to have inotifyprop change

Pobiega•3y ago

Im assuming thats what SetProperty does its a very common way to implement it

TotechsStrypperOP•3y ago

Do you think SetProp related to that yeah I think too

Pobiega•3y ago

but you need to raise two events here because when PhoneNumber changes, FullPhoneNumber also changes same for calling code I know the MVVM toolkit source generators support this, but in this case you might need to manually implement it

TotechsStrypperOP•3y ago

the dude ban me from using it because he want these crap to able to work with blazor

Pobiega•3y ago

¯\_(ツ)_/¯

MODiX•3y ago

Pobiega#2671

REPL Result: Success

var phoneNumber = "123";
var callingCode = "31";

Console.WriteLine($"+{callingCode} {phoneNumber}");

var phoneNumber = "123";
var callingCode = "31";

Console.WriteLine($"+{callingCode} {phoneNumber}");

Console Output

+31 123

+31 123

Compile: 515.197ms | Execution: 70.452ms | React with ❌ to remove this embed.

TotechsStrypperOP•3y ago

I tried this method but the prop require raise change for UI to work

Pobiega•3y ago

Which is why I told you to raise events for that prop in the other props setters since changing either of them will also change that value

TotechsStrypperOP•3y ago

Ah I get it

Pobiega•3y ago

public string CallingCode
{
    get => _callingCode;
    set
    {
        SetField(ref _callingCode, value);
        OnPropertyChanged(nameof(FullPhoneNumber));
    }
}

public string PhoneNumber
{
    get => _phoneNumber;
    set
    {
        SetField(ref _phoneNumber, value);
        OnPropertyChanged(nameof(FullPhoneNumber));
    }
}

public string FullPhoneNumber => $"+{CallingCode} {PhoneNumber}";

public string CallingCode
{
    get => _callingCode;
    set
    {
        SetField(ref _callingCode, value);
        OnPropertyChanged(nameof(FullPhoneNumber));
    }
}

public string PhoneNumber
{
    get => _phoneNumber;
    set
    {
        SetField(ref _phoneNumber, value);
        OnPropertyChanged(nameof(FullPhoneNumber));
    }
}

public string FullPhoneNumber => $"+{CallingCode} {PhoneNumber}";

TotechsStrypperOP•3y ago

Thanks mate

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ How to set relative properties ?