},System.Linq.Expressions.Expression{System.Func{--0,--2}},ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter{System.String})} },System.Action{ReactiveUI.Validation.States.IValidationState,--2},ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter{--2})}
ValidationBinding.ForValidationHelperProperty(TView, Expression>, Expression>, IValidationTextFormatter?) method¶
Defined in
Type: ValidationBinding
Namespace: ReactiveUI.Validation.ValidationBindings
Assembly: ReactiveUI.Validation.dll
Applies to
net10.0, net10.0-tvos26.0, net10.0-maccatalyst26.0, net10.0-browserwasm1.0, net10.0-desktop1.0, net10.0-macos26.0, net10.0-windows10.0.19041, net10.0-ios26.0, net10.0-android36.0, net9.0, net9.0-windows10.0.19041, net9.0-browserwasm1.0, net9.0-desktop1.0, net8.0, net8.0-macos14.2, net8.0-maccatalyst17.5, net8.0-ios17.5, net8.0-tvos17.2, net8.0-windows10.0.19041, net8.0-macos14.5, netstandard2.1, net481, net462, net471
Overloads¶
- 1.
public static IValidationBinding ForValidationHelperProperty<TView, TViewModel, TViewProperty>(TView view, Expression<Func<TViewModel?, ValidationHelper?>> viewModelHelperProperty, Expression<Func<TView, TViewProperty>> viewProperty, IValidationTextFormatter<string>? formatter = null) where TView : IViewFor<TViewModel> where TViewModel : class, IReactiveObject, IValidatableViewModel - 2.
public static IValidationBinding ForValidationHelperProperty<TView, TViewModel, TOut>(TView view, Expression<Func<TViewModel?, ValidationHelper?>> viewModelHelperProperty, Action<IValidationState, TOut> action, IValidationTextFormatter<TOut> formatter) where TView : IViewFor<TViewModel> where TViewModel : class, IReactiveObject, IValidatableViewModel
1. Overload¶
Attributes: [RequiresDynamicCode("WhenAnyValue uses expression trees which require dynamic code generation in AOT scenarios.")] [RequiresUnreferencedCode("WhenAnyValue may reference members that could be trimmed in AOT scenarios.")]
public static IValidationBinding ForValidationHelperProperty<TView, TViewModel, TViewProperty>(TView view, Expression<Func<TViewModel?, ValidationHelper?>> viewModelHelperProperty, Expression<Func<TView, TViewProperty>> viewProperty, IValidationTextFormatter<string>? formatter = null) where TView : IViewFor<TViewModel> where TViewModel : class, IReactiveObject, IValidatableViewModel
Summary: Creates a binding between a ValidationHelper and a specified View property.
Type parameters
| Name | Description |
|---|---|
TView | ViewFor of ViewModel type. |
TViewModel | ViewModel type. |
TViewProperty | View property type. |
Parameters
| Name | Type | Description |
|---|---|---|
view | TView | View instance. |
viewModelHelperProperty | Expression | ViewModel's ValidationHelper property. |
viewProperty | Expression | View property to bind the validation message. |
formatter = null | [IValidationTextFormatter | Validation formatter. Defaults to [SingleLineFormatter](# In order to override the global default value, implement [IValidationTextFormatter](# and register an instance of IValidationTextFormatter |
Returns: IValidationBinding -- Returns a validation component.
Exceptions
| Type | Condition |
|---|---|
| System.ArgumentNullException | Thrown when view, viewModelHelperProperty, or viewProperty is null. |
2. Overload¶
Attributes: [RequiresDynamicCode("WhenAnyValue uses expression trees which require dynamic code generation in AOT scenarios.")] [RequiresUnreferencedCode("WhenAnyValue may reference members that could be trimmed in AOT scenarios.")]
public static IValidationBinding ForValidationHelperProperty<TView, TViewModel, TOut>(TView view, Expression<Func<TViewModel?, ValidationHelper?>> viewModelHelperProperty, Action<IValidationState, TOut> action, IValidationTextFormatter<TOut> formatter) where TView : IViewFor<TViewModel> where TViewModel : class, IReactiveObject, IValidatableViewModel
Summary: Creates a binding from a ValidationHelper to a specified action. Such action binding allows to easily create new and more specialized platform-specific BindValidation extension methods like those we have in ViewForExtensions targeting the Android platform.
Type parameters
| Name | Description |
|---|---|
TView | ViewFor of ViewModel type. |
TViewModel | ViewModel type. |
TOut | Action return type. |
Parameters
| Name | Type | Description |
|---|---|---|
view | TView | View instance. |
viewModelHelperProperty | Expression | ViewModel's ValidationHelper property. |
action | Action | Action to be executed. |
formatter | [IValidationTextFormatter | Validation formatter. |
Returns: IValidationBinding -- Returns a validation component.
Exceptions
| Type | Condition |
|---|---|
| System.ArgumentNullException | Thrown when view, viewModelHelperProperty, action, or formatter is null. |