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ASP.NET MVC Editor-Templates/UIHint with parameters

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广开言路
广开言路 2020-12-23 00:11

I\'ve been using Editor-Templates in the past like this, by applying the following data annotation:

[UIHint("SomeTemplate")]

2条回答
  • 囚心锁ツ
    囚心锁ツ (楼主)
    2020-12-23 00:28

    You could use the UHint without AdditionalMetadata attribute, but some additional code is requred

    [UIHint("DateTime", null, "key1", "value1", "key2", "value2")]
public DateTime Date { get; set; }

    override CreateMetadata:

    public class CustomMetadataProvider : DataAnnotationsModelMetadataProvider
    {
        public const string UiHintControlParameters = "UiHintControlParameters";

        protected override ModelMetadata CreateMetadata(
            IEnumerable attributes,
            Type containerType,
            Func modelAccessor,
            Type modelType,
            string propertyName)
        {

            ModelMetadata metadata = base.CreateMetadata(
                attributes,
                containerType,
                modelAccessor,
                modelType,
                propertyName);

            IEnumerable uiHintAttributes = attributes.OfType();
            UIHintAttribute uiHintAttribute = uiHintAttributes.FirstOrDefault(a => string.Equals(a.PresentationLayer, "MVC", StringComparison.OrdinalIgnoreCase))
                                              ?? uiHintAttributes.FirstOrDefault(a => String.IsNullOrEmpty(a.PresentationLayer));
            if (uiHintAttribute != null)
            {
                metadata.AdditionalValues.Add(UiHintControlParameters, uiHintAttribute.ControlParameters);
            }

            return metadata;
        }



    Register CustomMetadataProvider:
    


        public static void Application_Start()
    {
        ModelMetadataProviders.Current = new CustomMetadataProvider();
    }

    


    and in your template:
    


        @{
        IDictionary values = (IDictionary)
ViewData.ModelMetadata.AdditionalValues[CustomMetadataProvider.UiHintControlParameters];
    }

    
    
    
             
    
                                                        
    
            
            
    
              
                
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