如何在HtmlHelper中调用`EditorExtensions.EditorFor`?

时间:2011-06-30 10:22:03

标签: c# asp.net-mvc html-helper

我在CreateView中使用不同的模型,所有模型都继承自BaseModel。调用正确的EditorFor我已经创建了一个获取Model和实际属性的HtmlHelper。但我不知道如何调用它。

BaseModel:

public abstract class BaseModel
{
    protected IEnumerable<PropertyInfo> PropertyInfoCache { get; set; }
    protected IEnumerable<EnumeratedProperty> EnumeratedPropertyCache { get; set; }
    protected BaseModel()
    {
        PropertyInfoCache = this.GetType().GetProperties();
        EnumeratedPropertyCache = PropertyInfoCache.Select(p=> new EnumeratedProperty(p.Name,p.GetType()));
    }
    public IEnumerable<EnumeratedProperty> EnumerateProperties()
    {
        return EnumeratedPropertyCache;
    }
    public object GetPropertyValue(string PropertyName)
    {
        var property = PropertyInfoCache.SingleOrDefault(i=>i.Name==PropertyName);
        if(property!=null)
            return property.GetValue(this,null);
        return null;
    }
}

public class EnumeratedProperty
{
    public string Name { get; private set; }
    public Type Type { get; private set; }
    public EnumeratedProperty(string PropertyName, Type PropertyType)
    {
        this.Name = PropertyName;
        this.Type = PropertyType;
    }
}

在我的观点中:

@foreach (var property in Model.EnumerateProperties())
{
    @Html.EditorForProperty(Model,property);
}

的HtmlHelper:

public static class ExtensionMethods
{
    public static MvcHtmlString EditorForProperty(this HtmlHelper html, BaseModel Model, EnumeratedProperty property)
    {
        // creates an error: The type arguments for method 'EditorFor' cannot be inferred from the usage. Try specifying the type arguments explicitly.
        return System.Web.Mvc.Html.EditorExtensions.EditorFor(html, Model => Model.GetPropertyValue(property.Name) );
    }
}

1 个答案:

答案 0 :(得分:0)

EditorFor可识别对象的类型,因此您要做的是从EnumeratedProperty类中的值中提取类型,而不是直接传递类,并从中传递值。