56 lines
2.0 KiB
C#
56 lines
2.0 KiB
C#
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namespace System.Web.Mvc {
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using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Linq;
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public class ValueProviderCollection : Collection<IValueProvider>, IValueProvider, IUnvalidatedValueProvider {
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public ValueProviderCollection() {
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}
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public ValueProviderCollection(IList<IValueProvider> list)
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: base(list) {
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}
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public virtual bool ContainsPrefix(string prefix) {
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return this.Any(vp => vp.ContainsPrefix(prefix));
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}
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public virtual ValueProviderResult GetValue(string key) {
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return GetValue(key, skipValidation: false);
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}
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public virtual ValueProviderResult GetValue(string key, bool skipValidation) {
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return (from provider in this
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let result = GetValueFromProvider(provider, key, skipValidation)
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where result != null
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select result).FirstOrDefault();
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}
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internal static ValueProviderResult GetValueFromProvider(IValueProvider provider, string key, bool skipValidation) {
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// Since IUnvalidatedValueProvider is a superset of IValueProvider, it's always OK to use the
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// IUnvalidatedValueProvider-supplied members if they're present. Otherwise just call the
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// normal IValueProvider members.
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IUnvalidatedValueProvider unvalidatedProvider = provider as IUnvalidatedValueProvider;
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return (unvalidatedProvider != null) ? unvalidatedProvider.GetValue(key, skipValidation) : provider.GetValue(key);
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}
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protected override void InsertItem(int index, IValueProvider item) {
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if (item == null) {
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throw new ArgumentNullException("item");
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}
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base.InsertItem(index, item);
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}
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protected override void SetItem(int index, IValueProvider item) {
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if (item == null) {
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throw new ArgumentNullException("item");
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}
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base.SetItem(index, item);
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}
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}
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}
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