How to set HasError in TextInputLayout from Entry?

[Andrea Ferrari]

Hi,

I've an entry for email with a behavior checking if the field is correct.

In XAML is:

<inputLayout:SfTextInputLayout ContainerType="Outlined" Hint="Indirizzo Email" ErrorText="L'indirizzo email non è valido">

    <Entry TextColor="White" Text="{Binding Email}" Keyboard="Email" IsVisible="{Binding IsNotPartner}" >
        <Entry.Behaviors>
            <local:EmailValitationBehavior />
        </Entry.Behaviors>
    </Entry>

</inputLayout:SfTextInputLayout>

The Behavior is:

public class EmailValitationBehavior : Behavior<Entry>
    {
        const string emailRegex = @"^(?("")("".+?(?<!\\)""@)|(([0-9a-z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-z])@))" +
            @"(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-z][-\w]*[0-9a-z]*\.)+[a-z0-9][\-a-z0-9]{0,22}[a-z0-9]))$";

        protected override void OnAttachedTo(Entry bindable)
        {
            bindable.Unfocused += HandleCompleted;
            base.OnAttachedTo(bindable);
        }

        void HandleCompleted(object sender, EventArgs e)
        {
            Entry s = (Entry)sender;
            bool IsValid = (Regex.IsMatch(s.Text, emailRegex, RegexOptions.IgnoreCase, TimeSpan.FromMilliseconds(250)));
            s.TextColor = IsValid ? Color.Blue : Color.Red;
            (s.Parent as SfTextInputLayout).HasError = IsValid ? false : true;
        }

        protected override void OnDetachingFrom(Entry bindable)
        {
            bindable.Unfocused -= HandleCompleted;
            base.OnDetachingFrom(bindable);
        }
    }

I've tryied to set the HasError of the Parent of Entry, but its doesn't work.

How to do that in a MVVM environment (PRISM)?

Thanks a lot and have a nice day,

Andrea

 

[Bharathiraja K]

Hi Andrea, 

 

Thank you for your interest in Syncfusion products. 

 

We have prepared the sample based on your requirement. Please refer the below code snippet for your understanding. 

 

Code Snippet [C#]: 

private void Entry_Unfocused(object sender, FocusEventArgs e) 

{ 

Entry inputView = (Entry)sender; 

bool IsValid = (Regex.IsMatch(inputView.Text, emailRegex, RegexOptions.IgnoreCase, TimeSpan.FromMilliseconds(250))); 

inputView.TextColor = IsValid ? Color.Blue : Color.Red; 

model.TextHasError = !IsValid; 

} 

 

Note: 

You can also achieve your requirement by using custom behavior with below change in your code snippet. 

 

Code Snippet [C#] 

(s.Parent.Parent.Parent as SfTextInputLayout).HasError = IsValid ? false : true; 

 

Please download the sample from the below link. 

 

Sample link: http://www.syncfusion.com/downloads/support/directtrac/general/ze/Binding312203961  

 

Regards, 

Bharathi.