Windows 10 data validation (Universal Windows App)

Question

I tried to figure out how to perform data validation in UWP, but according to what I found, in principle, I can not implement anything.

In this regard, I tried to implement my own validation logic. The problem that I have now is that I display error information on one TextBlock, and not directly below the specific TextBoxone that contains the data error.

This is what I am doing at the moment:

public class Customer : ViewModel
{
    private string _Name = default(string);
    public string Name { get { return _Name; } set { SetProperty(ref _Name, value); OnPropertyChanged("IsValid"); } }


    private string _Surname = default(string);
    public string Surname { get { return _Surname; } set { SetProperty(ref _Surname, value); OnPropertyChanged("IsValid"); } }

    private DateTime _DateOfBirth = default(DateTime);
    public DateTime DateOfBirth { get { return _DateOfBirth; } set { SetProperty(ref _DateOfBirth, value); OnPropertyChanged("IsValid"); } }

    public int ID { get; set; }

    public bool IsValid
    {
        get
        {
            //restart error info
            _ErrorInfo = default(string);
            if (string.IsNullOrWhiteSpace(Name))
                _ErrorInfo += "Name cannot be empty!" + Environment.NewLine;

            if (string.IsNullOrWhiteSpace(Surname))
                _ErrorInfo += "Surname cannot be empty!" + Environment.NewLine;

            //raise property changed
            OnPropertyChanged("ErrorInfo");

            return !string.IsNullOrWhiteSpace(Name) &&
                !string.IsNullOrWhiteSpace(Surname);
        }
    }


    private string _ErrorInfo = default(string);
    public string ErrorInfo { get { return _ErrorInfo; } set { SetProperty(ref _ErrorInfo, value); } }

}

Question:

How to configure my code so that instead of having one label with all the error information, I can assign a shortcut under each text box and display a validation error there? Should I use a dictionary for this? If so, how can I tie it to my view?

Answer 1

Prism, UWP.

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Answer 2

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Answer 3

Prism , . Bind uwp ... ! , , .

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