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Commit 2d25588

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Update readme file.
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‎README.md

Lines changed: 44 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -362,18 +362,32 @@ public class MyViewModel : IBindingContext
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#### Wrapping a non-observable model
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A common scenario, for instance, when working with collection items, is to create a wrapping "bindable" item model that relays properties of the collection item model, and raises the property value changed notifications when needed.
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A common scenario, for instance, when working with database items, is to create a wrapping "bindable" model that relays properties of the database model, and raises the property changed notifications when needed.
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```csharp
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public class ItemViewModel : IBindingContext
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public class UserViewModel : IBindingContext
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{
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private readonly User _user;
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[Observable(nameof(Name))]
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private readonly IProperty<string> _name = new Property<string>();
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public UserViewModel(User user)
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{
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_user = user;
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_name.Value = user.Name;
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}
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public string Name
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{
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get => _name.Value;
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set => _name.Value = value;
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set
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{
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if (_name.TrySetValue(value))
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{
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_user.Name = value;
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}
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}
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}
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}
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```
@@ -389,24 +403,38 @@ The `ItemViewModel` can be serialized and deserialized without any issues.
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To achieve the same result, but with minimal boilerplate code, you can automatically create an observable backing field using the `[WithObservableBackingField]` attribute from [UnityMvvmToolkit.Generator](https://github.com/LibraStack/UnityMvvmToolkit.Generator).
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```csharp
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public partial class ItemViewModel : IBindingContext
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public partial class UserViewModel : IBindingContext
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{
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private readonly User _user;
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public UserViewModel(User user)
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{
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_user = user;
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_name.Value = user.Name;
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}
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[WithObservableBackingField]
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public string Name
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{
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get => _name.Value;
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set => _name.Value = value;
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set
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{
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if (_name.TrySetValue(value))
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{
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_user.Name = value;
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}
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}
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}
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}
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```
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<details><summary><b>Generated code</b></summary>
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<br />
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`ItemViewModel.BackingFields.g.cs`
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`UserViewModel.BackingFields.g.cs`
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```csharp
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partial class ItemViewModel
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partial class UserViewModel
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{
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[global::System.CodeDom.Compiler.GeneratedCode("UnityMvvmToolkit.Generator", "1.0.0.0")]
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[global::UnityMvvmToolkit.Core.Attributes.Observable(nameof(Name))]
@@ -419,8 +447,16 @@ partial class ItemViewModel
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Waiting for the [partial properties](https://github.com/dotnet/csharplang/issues/6420) support to make it even shorter.
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```csharp
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public partial class ItemViewModel : IBindingContext
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public partial class UserViewModel : IBindingContext
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{
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private readonly User _user;
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public UserViewModel(User user)
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{
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_user = user;
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_name.Value = user.Name;
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}
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[WithObservableBackingField]
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public partial string Name { get; set; }
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}

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