public ErrorInfoHandler(FrameworkElement element, INotifyDataErrorInfo errorInfo, DependencyProperty dp)
{
_element = element;
_bindingExpr = element.GetBindingExpression(dp);
// ReSharper disable once PossibleNullReferenceException
_propertyName = _bindingExpr.ResolvedSourcePropertyName;
_errorInfo = errorInfo;
_errorsContainer = errorInfo as IPropertyErrorsContainer;
}
public static IDisposable SetupValidation <T, TProperty>(this object viewModel, IPropertyErrorsContainer errorsContainer, Expression <Func <T, TProperty> > expr, Func <T, TProperty, string> validateFunc)
{
var vm = viewModel ?? throw new ArgumentNullException(nameof(viewModel));
var name = expr.GetMember();
var type = typeof(IPropertyErrorsContainer <>).MakeGenericType(vm.GetType());
// ReSharper disable once PossibleNullReferenceException
var setupValidationMethod = type.GetMethod("SetupValidation").MakeGenericMethod(typeof(TProperty));
var result = (IDisposable)setupValidationMethod.Invoke(errorsContainer, new object[] { name, validateFunc });
return(result);
}
public static IDisposable SetupValidation <T, TProperty>(this IPropertyErrorsContainer <T> vm, Expression <Func <T, TProperty> > expr, Func <T, TProperty, string> validateFunc)
{
var name = expr.GetMember();
return(vm.SetupValidation(name, validateFunc));
}
