ameerthehacker

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ameerthehacker

namespace XamarinFormValidation.Validators.Contracts
{
    public interface IValidator
    {
        string Message { get; set; }
        bool Check(string value);
    }
}

ameerthehacker

using XamarinFormValidation.Validators.Contracts;

namespace XamarinFormValidation.Validators.Implementations
{
    public class RequiredValidator: IValidator
    {
        public string Message { get; set; } = "This field is required";

        public bool Check(string value)
        {

ameerthehacker

using System.Text.RegularExpressions;
using XamarinFormValidation.Validators.Contracts;

namespace XamarinFormValidation.Validators.Implementations
{
    public class FormatValidator: IValidator
    {
        public string Message { get; set; } = "Invalid format";
        public string Format { get; set; }

ameerthehacker

using Xamarin.Forms;

namespace XamarinFormValidation.Validators.Contracts
{
    public interface IErrorStyle
    {
        void ShowError(View view, string message);
        void RemoveError(View view);
    }
}

ameerthehacker

using Xamarin.Forms;
using XamarinFormValidation.Validators.Contracts;

namespace XamarinFormValidation.Validators.Implementations
{
    public class BasicErrorStyle: IErrorStyle
    {
        public void ShowError(View view, string message)
        {
            StackLayout layout = view.Parent as StackLayout;

ameerthehacker

using Xamarin.Forms;
using System.Collections.ObjectModel;
using XamarinFormValidation.Validators.Contracts;
using XamarinFormValidation.Validators.Implementations;
using System.ComponentModel;

namespace XamarinFormValidation.Behaviors
{
    public class ValidationBehavior : Behavior<View>
    {

ameerthehacker

...
namespace XamarinFormValidation.Behaviors
{
    public class ValidationBehavior : Behavior<View>
    {
        ...
        public bool Validate()
        {
            bool isValid = true;
            string errorMessage = "";

ameerthehacker

...
<Entry>
    <Entry.Behaviors>
        <Behaviors:ValidationBehavior Group="{x:Reference form}" PropertyName="Text">
            <Behaviors:ValidationBehavior.Validators>
                <v:FormatValidator Format="^[0-9]{6}$" Message="Village Code must be 6 digit" />
                <v:RequiredValidator />
            </Behaviors:ValidationBehavior.Validators>
        </Behaviors:ValidationBehavior>
    </Entry.Behaviors>

ameerthehacker

...
namespace XamarinFormValidation.Behaviors
{
    public class ValidationBehavior : Behavior<View>
    {
        ...
        public bool Validate()
        {
            ...
        }