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namespace System.Web.ModelBinding {
public static class ModelBinders {
private static readonly ModelBinderDictionary _binders = CreateDefaultBinderDictionary();
public static ModelBinderDictionary Binders {
get {
return _binders;
}
}
#if UNDEF
internal static IModelBinder GetBinderFromAttributes(Type type, Func<string> errorMessageAccessor) {
AttributeCollection allAttrs = TypeDescriptorHelper.Get(type).GetAttributes();
CustomModelBinderAttribute[] filteredAttrs = allAttrs.OfType<CustomModelBinderAttribute>().ToArray();
return GetBinderFromAttributesImpl(filteredAttrs, errorMessageAccessor);
}
internal static IModelBinder GetBinderFromAttributes(ICustomAttributeProvider element, Func<string> errorMessageAccessor) {
CustomModelBinderAttribute[] attrs = (CustomModelBinderAttribute[])element.GetCustomAttributes(typeof(CustomModelBinderAttribute), true /* inherit */);
return GetBinderFromAttributesImpl(attrs, errorMessageAccessor);
}
private static IModelBinder GetBinderFromAttributesImpl(CustomModelBinderAttribute[] attrs, Func<string> errorMessageAccessor) {
// this method is used to get a custom binder based on the attributes of the element passed to it.
// it will return null if a binder cannot be detected based on the attributes alone.
if (attrs == null) {
return null;
}
switch (attrs.Length) {
case 0:
return null;
case 1:
IModelBinder binder = attrs[0].GetBinder();
return binder;
default:
string errorMessage = errorMessageAccessor();
throw new InvalidOperationException(errorMessage);
}
}
#endif
private static ModelBinderDictionary CreateDefaultBinderDictionary() {
// We can't add a binder to the HttpPostedFileBase type as an attribute, so we'll just
// prepopulate the dictionary as a convenience to users.
ModelBinderDictionary binders = new ModelBinderDictionary() {
#if UNDEF
{ typeof(HttpPostedFileBase), new HttpPostedFileBaseModelBinder() },
{ typeof(byte[]), new ByteArrayModelBinder() },
{ typeof(Binary), new LinqBinaryModelBinder() }
#endif
};
return binders;
}
}
}
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