M.BindableProperty.Generator 0.9.1

There is a newer version of this package available.
See the version list below for details. 
dotnet add package M.BindableProperty.Generator --version 0.9.1                

                    
                

            
NuGet\Install-Package M.BindableProperty.Generator -Version 0.9.1
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="M.BindableProperty.Generator" Version="0.9.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add M.BindableProperty.Generator --version 0.9.1                

                    
                

            
#r "nuget: M.BindableProperty.Generator, 0.9.1"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
// Install M.BindableProperty.Generator as a Cake Addin
#addin nuget:?package=M.BindableProperty.Generator&version=0.9.1

// Install M.BindableProperty.Generator as a Cake Tool
#tool nuget:?package=M.BindableProperty.Generator&version=0.9.1

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Maui.BindableProperty.Generator

Source generator that automatically transforms fields into BindableProperties that can be used in MAUI.
Are you looking for the Xamarin project? check this link

Installation

First, install NuGet. Then, install M.BindableProperty.Generator from the package manager console:

PM> Install-Package M.BindableProperty.Generator

Usage - Simple implementation

Just decorate the field with the Bindable attribute.

    using Maui.BindableProperty.Generator.Core;

    public partial class CustomEntry : ContentView
    {
        [AutoBindable]
        private readonly string _placeholder;
    }

the prevoius code will generate this:

    public partial class CustomEntry
    {
        public static readonly Microsoft.Maui.Controls.BindableProperty PlaceholderProperty =
                                    Microsoft.Maui.Controls.BindableProperty.Create(
                                                            nameof(Placeholder),
                                                            typeof(string),
                                                            typeof(CustomEntry),
                                                            default(string));

        public string Placeholder
        {
            get => (string)GetValue(PlaceholderProperty);
            set => SetValue(PlaceholderProperty, value);
        }
    }

Options

Option Description Type
PropertyName Specifies the prefix used to create the BindableProperty, if PropertyName is null, then will take the name of the field removing the underscores and using PascalCase. Example: _tex_t will be transformed to Text. string
OnChanged Specifies the name of the method to be executed when the property changed. string
DefaultValue Specifies the "text/value" that will be used as default. Example: default(string) string
DefaultBindingMode Specifies the "BindingMode" as string that will be used as default. Options: Default/TwoWay/OneWay/OneWayToSource/OneTime. Example: nameof(BindingMode.TwoWay) string
HidesUnderlyingProperty Specifies if the BindingProperty will hide the current implementation. bool
ValidateValue Specifies the name of the method to be executed to validate the values. string

Usage - PropertyName

Just decorate the field with the Bindable attribute.

    using Maui.BindableProperty.Generator.Core;

    public partial class CustomEntry : ContentView
    {
        [AutoBindable(PropertyName = "Text")]
        private readonly string _t;
    }

the prevoius code will generate this:

    public partial class CustomEntry
    {
        public static readonly Microsoft.Maui.Controls.BindableProperty TextProperty =
                                    Microsoft.Maui.Controls.BindableProperty.Create(
                                                            nameof(Text),
                                                            typeof(string),
                                                            typeof(CustomEntry),
                                                            default(string));

        public string Text
        {
            get => (string)GetValue(TextProperty);
            set => SetValue(TextProperty, value);
        }
    }

Usage - OnChanged

Example 1 - No Parameters

Just decorate the field with the Bindable attribute.

    using Maui.BindableProperty.Generator.Core;

    public partial class HeaderControl : ContentView
    {
        [AutoBindable(OnChanged = nameof(UpdateDisplayName))]
        private readonly string _firstName;

        private void UpdateDisplayName()
        { 
            // Do stuff here
        }
    }

the prevoius code will generate this:

    public partial class HeaderControl
    {
        public static readonly Microsoft.Maui.Controls.BindableProperty FirstNameProperty =
                                    Microsoft.Maui.Controls.BindableProperty.Create(
                                                            nameof(FirstName),
                                                            typeof(string),
                                                            typeof(HeaderControl),
                                                            defaultValue: default(string),
                                                            propertyChanged: __UpdateDisplayName);

        public string FirstName
        {
            get => (string)GetValue(FirstNameProperty);
            set => SetValue(FirstNameProperty, value);
        }

        private static void __UpdateDisplayName(Microsoft.Maui.Controls.BindableObject bindable, object oldValue, object newValue)
        {
            var ctrl = (HeaderControl)bindable;
            ctrl.UpdateDisplayName();
        }
    }

Example 2 - One Parameter

Just decorate the field with the Bindable attribute. The 'UpdateDisplayName' method must have only one parameter (must match the type of the field)

    using Maui.BindableProperty.Generator.Core;

    public partial class HeaderControl : ContentView
    {
        [AutoBindable(OnChanged = nameof(UpdateDisplayName))]
        private readonly string _firstName;

        private void UpdateDisplayName(string newValue)
        { 
            // Do stuff here
        }
    }

the prevoius code will generate this:

    public partial class HeaderControl
    {
        public static readonly Microsoft.Maui.Controls.BindableProperty FirstNameProperty =
                                    Microsoft.Maui.Controls.BindableProperty.Create(
                                                            nameof(FirstName),
                                                            typeof(string),
                                                            typeof(HeaderControl),
                                                            defaultValue: default(string),
                                                            propertyChanged: __UpdateDisplayName);

        public string FirstName
        {
            get => (string)GetValue(FirstNameProperty);
            set => SetValue(FirstNameProperty, value);
        }

        private static void __UpdateDisplayName(Microsoft.Maui.Controls.BindableObject bindable, object oldValue, object newValue)
        {
            var ctrl = (HeaderControl)bindable;
            ctrl.UpdateDisplayName((string)newValue);
        }
    }

Example 3 - Two Parameters

Just decorate the field with the Bindable attribute. The 'UpdateDisplayName' method must have two parameters (must match the type of the field)

    using Maui.BindableProperty.Generator.Core;

    public partial class HeaderControl : ContentView
    {
        [AutoBindable(OnChanged = nameof(UpdateDisplayName))]
        private readonly string _firstName;

        private void UpdateDisplayName(string oldValue, string newValue)
        { 
            // Do stuff here
        }
    }

the prevoius code will generate this:

    public partial class HeaderControl
    {
        public static readonly Microsoft.Maui.Controls.BindableProperty FirstNameProperty =
                                    Microsoft.Maui.Controls.BindableProperty.Create(
                                                            nameof(FirstName),
                                                            typeof(string),
                                                            typeof(HeaderControl),
                                                            defaultValue: default(string),
                                                            propertyChanged: __UpdateDisplayName);

        public string FirstName
        {
            get => (string)GetValue(FirstNameProperty);
            set => SetValue(FirstNameProperty, value);
        }

        private static void __UpdateDisplayName(Microsoft.Maui.Controls.BindableObject bindable, object oldValue, object newValue)
        {
            var ctrl = (HeaderControl)bindable;
            ctrl.UpdateDisplayName((string)oldValue, (string)newValue);
        }
    }

Usage - DefaultValue

Example 1 - DateTime

Just decorate the field with the Bindable attribute and add the "text/value" that you want to use as default value.

    using Maui.BindableProperty.Generator.Core;

    public partial class HeaderControl : ContentView
    {
        [AutoBindable(DefaultValue = "DateTime.Now")]
        private readonly DateTime _birthDate;
    }

the prevoius code will generate this:

    public partial class HeaderControl
    {
        public static readonly Microsoft.Maui.Controls.BindableProperty BirthDateProperty =
                                    Microsoft.Maui.Controls.BindableProperty.Create(
                                                            nameof(BirthDate),
                                                            typeof(System.DateTime),
                                                            typeof(HeaderControl),
                                                            defaultValue: DateTime.Now);

        public System.DateTime BirthDate
        {
            get => (System.DateTime)GetValue(BirthDateProperty);
            set => SetValue(BirthDateProperty, value);
        }
    }

Example 2 - String

Just decorate the field with the Bindable attribute and add the "text/value" that you want to use as default value.

    using Maui.BindableProperty.Generator.Core;

    public partial class HeaderControl : ContentView
    {
        [AutoBindable(DefaultValue = "USA")]
        private readonly string _country;
    }

the prevoius code will generate this:

    public partial class HeaderControl
    {
        public static readonly Microsoft.Maui.Controls.BindableProperty CountryProperty =
                                    Microsoft.Maui.Controls.BindableProperty.Create(
                                                            nameof(Country),
                                                            typeof(string),
                                                            typeof(HeaderControl),
                                                            defaultValue: "USA");

        public string Country
        {
            get => (string)GetValue(CountryProperty);
            set => SetValue(CountryProperty, value);
        }
    }

Usage - DefaultBindingMode

Just decorate the field with the Bindable attribute and add the "BindingMode" that you want to use as default value.

    using Maui.BindableProperty.Generator.Core;

    public partial class HeaderControl : ContentView
    {
        [AutoBindable(DefaultBindingMode = nameof(BindingMode.TwoWay))]
        private readonly string _firstName;
    }

the prevoius code will generate this:

    public partial class HeaderControl
    {
        public static readonly Microsoft.Maui.Controls.BindableProperty FirstNameProperty =
                                    Microsoft.Maui.Controls.BindableProperty.Create(
                                                            nameof(FirstName),
                                                            typeof(string),
                                                            typeof(HeaderControl),
                                                            defaultValue: default(string),
                                                            defaultBindingMode: Microsoft.Maui.Controls.BindingMode.TwoWay);

        public string FirstName
        {
            get => (string)GetValue(FirstNameProperty);
            set => SetValue(FirstNameProperty, value);
        }
    }

Usage - HidesUnderlyingProperty

Just decorate the field with the Bindable attribute and set "HidesUnderlyingProperty = true".

    using Maui.BindableProperty.Generator.Core;

    public partial class HeaderControl : ContentView
    {
        [AutoBindable(HidesUnderlyingProperty = true)]
        private readonly Color _backgroundColor;
    }

the prevoius code will generate this:

    public partial class HeaderControl
    {
        public static new readonly Microsoft.Maui.Controls.BindableProperty BackgroundColorProperty =
                                        Microsoft.Maui.Controls.BindableProperty.Create(
                                                                nameof(BackgroundColor),
                                                                typeof(Microsoft.Maui.Graphics.Color),
                                                                typeof(HeaderControl));

        public new Microsoft.Maui.Graphics.Color BackgroundColor
        {
            get => (Microsoft.Maui.Graphics.Color)GetValue(BackgroundColorProperty);
            set => SetValue(BackgroundColorProperty, value);
        }
    }

Usage - ValidateValue

Example 1 - Non-Static Method

Just decorate the field with the Bindable attribute. The 'ValidateNotNull' method must have two parameters (one of type BindableObject and the second one must be the same as the field)

    using Maui.BindableProperty.Generator.Core;

    public partial class HeaderControl : ContentView
    {
        [AutoBindable(ValidateValue = nameof(ValidateIsNullOrEmpty))]
        private readonly string? _country;

        private bool ValidateIsNullOrEmpty(BindableObject _, string? value)
        {
            // Do stuff here
            return !string.IsNullOrEmpty(value);
        }
    }

the prevoius code will generate this:

    public partial class HeaderControl
    {
        public static readonly Microsoft.Maui.Controls.BindableProperty CountryProperty =
                                        Microsoft.Maui.Controls.BindableProperty.Create(
                                                                nameof(Country),
                                                                typeof(string),
                                                                typeof(HeaderControl),
                                                                validateValue: __ValidateIsNullOrEmpty);

        public string? Country
        {
            get => (string?)GetValue(CountryProperty);
            set => SetValue(CountryProperty, value);
        }

        private static bool __ValidateIsNullOrEmpty(Microsoft.Maui.Controls.BindableObject bindable, object value)
        {
            var ctrl = (HeaderControl)bindable;
            return ctrl.ValidateIsNullOrEmpty(ctrl, (string?)value);
        }
    }

Example 2 - Static Method

Just decorate the field with the Bindable attribute. The 'ValidateNotNull' method must have two parameters (one of type BindableObject and the second one must be object type)

    using Maui.BindableProperty.Generator.Core;

    public partial class HeaderControl : ContentView
    {
        [AutoBindable(ValidateValue = nameof(ValidateNotNull))]
        private readonly string? _country;

        private static bool ValidateNotNull(BindableObject _, object value) => value != null;
    }

the prevoius code will generate this:

    public partial class HeaderControl
    {
        public static readonly Microsoft.Maui.Controls.BindableProperty CountryProperty =
                                        Microsoft.Maui.Controls.BindableProperty.Create(
                                                                nameof(Country),
                                                                typeof(string),
                                                                typeof(HeaderControl),
                                                                defaultValue: default(string?),
                                                                validateValue: ValidateNotNull);

        public string? Country
        {
            get => (string?)GetValue(CountryProperty);
            set => SetValue(CountryProperty, value);
        }
    }

Do you want to remove the compiler warning CS0169 ?

    using Maui.BindableProperty.Generator.Core;

    public partial class HeaderControl : ContentView
    {
        #pragma warning disable CS0169

        [AutoBindable]
        private readonly string? _country;

        #pragma warning restore CS0169
    }

Project status

  • ✅ PropertyName - Done
  • ✅ OnChanged - Done
  • ✅ DefaultValue - Done
  • ✅ DefaultBindingMode - Done
  • ✅ HidesUnderlyingProperty - Done
  • ✅ ValidateValue - Done

Extra info

This repo is using part of the code of CodeWriter to generate the CSharp files, thanks to the author.

There are no supported framework assets in this package.

Learn more about Target Frameworks and .NET Standard.

  • .NETStandard 2.0

    • No dependencies.

NuGet packages (6)

Showing the top 5 NuGet packages that depend on M.BindableProperty.Generator:

Package Downloads
The49.Maui.ContextMenu

.NET MAUI library for Android and iOS to open a native context menu on long press.
Sm.Maui.BottomSheet

ModalBottomSheet view for .NET MAUI
SimpleRatingControl.MAUI

Simple Rating Control for .NET MAUI
Yang.Maui.Helper.Controls

Package Description
tsjdevapps.MauiControlsLib

Controls Library for .NET MAUI

GitHub repositories (3)

Showing the top 3 popular GitHub repositories that depend on M.BindableProperty.Generator:

Repository Stars
VladislavAntonyuk/MauiSamples
.NET MAUI Samples
the49ltd/The49.Maui.BottomSheet
.NET MAUI library used to display pages as Bottom Sheets
nor0x/Dots
the 🙂 friendly .NET SDK manager
Version Downloads Last updated
0.11.1 60,271 6/28/2023
0.11.0 203 6/28/2023
0.10.0 5,926 3/28/2023
0.9.3 8,856 12/7/2022
0.9.2 5,825 11/15/2022
0.9.1 913 9/27/2022
0.9.0 1,245 8/30/2022
0.8.3 1,341 7/27/2022
0.8.2 4,019 7/4/2022
0.8.1 550 7/1/2022
0.8.0 546 6/29/2022
0.7.0 657 4/28/2022
0.6.0 530 4/28/2022
0.5.0 517 4/21/2022
0.4.1 531 4/14/2022
0.4.0 535 4/12/2022
0.3.3 508 4/1/2022
0.3.2 501 4/1/2022
0.3.0 597 4/1/2022

Bugfix in defaultValue when "string.Empty"