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POExtension MVC C# LabelFor get all properties
 

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  1. POExtension MVC C# LabelFor get all properties
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    <p>I'm trying to put together a personalized LabelFor, which take all the properties of the class that are assembled in Data Annotations, and as the property change my Label.</p> <p>example:</p> <pre><code>[Obrigatorio] [Display(Name = "Sexo")] [SexoComTipoPessoa] [NotMapped] public int SexoID { get; set; } </code></pre> <p>This code is ok:</p> <pre><code>[AttributeUsageAttribute(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter, AllowMultiple = false)] public class SexoComTipoPessoa : ValidationAttribute { protected override ValidationResult IsValid(object value, ValidationContext validationContext) { var property = validationContext.ObjectInstance.GetType().GetProperty("TipoPessoaID"); if (property == null) return new ValidationResult("Propriedade desconhecida: 'TipoPessoaID'"); var propertyValue = property.GetValue(validationContext.ObjectInstance, null); /* Tipo de pessoa 2 - é pessoa juridicia */ if (Convert.ToInt32(propertyValue) == 2) { if (Convert.ToInt32(value) != 3) return new ValidationResult("Para o tipo de pessoa 'Juridíca', deve ser selecionado o sexo 'Não aplicavél'!"); } else if (Convert.ToInt32(propertyValue) == 1) { if (Convert.ToInt32(value) == 3) return new ValidationResult("Para o tipo de pessoa 'Física', deve ser selecionado o sexo 'Masculino' ou 'Feminino'!"); } return ValidationResult.Success; } } </code></pre> <p>This code not ok, when you want the property [Obrigatorio], the label has the property Display (Name = "") and add " * Obrigatório" or [SexoComTipoPessoa] the label has the property Display (Name = "") and add " * Sexo deve ser compativel com tipo de pessoa"</p> <p>public static class LabelExtensions</p> <pre><code>{ public static MvcHtmlString LabelWithTooltip&lt;TModel, TValue&gt;(this HtmlHelper&lt;TModel&gt; helper, Expression&lt;Func&lt;TModel, TValue&gt;&gt; expression) { var metaData = ModelMetadata.FromLambdaExpression(expression, helper.ViewData); string htmlFieldName = ExpressionHelper.GetExpressionText(expression); string labelText = metaData.DisplayName ?? metaData.PropertyName ?? htmlFieldName.Split('.').Last(); if (String.IsNullOrEmpty(labelText)) return MvcHtmlString.Empty; var label = new TagBuilder("label"); label.Attributes.Add("for", helper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(htmlFieldName)); if (!string.IsNullOrEmpty(metaData.Description)) label.Attributes.Add("title", metaData.Description); label.SetInnerText(labelText); return MvcHtmlString.Create(label.ToString()); } } </code></pre>
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    1. USTiedt Tech
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    1. COWhat is the expected output? What is the actual output? It's difficult to make sense of your question.
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      1. POExtension MVC C# LabelFor get all properties
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    2. COI would like to have when DataAnnotation [Obrigatorio] or [SexoComTipoPessoa] he put a pre-defined text in Label. But I do not know how to read if the property has [Obrigatorio] or [SexoComTipoPessoa] in public static MvcHtmlString LabelWithTooltip<TModel, TValue>(this HtmlHelper<TModel> helper, Expression<Func<TModel, TValue>> expression) @AntP
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