85 lines
2.8 KiB
C#
85 lines
2.8 KiB
C#
// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
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using System.Dynamic;
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using System.Globalization;
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using System.Reflection;
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namespace System.Web.WebPages
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{
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// Allows dynamic access over a CLR object via private reflection
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internal sealed class ReflectionDynamicObject : DynamicObject
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{
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private object RealObject { get; set; }
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public static object WrapObjectIfInternal(object o)
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{
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// If it's null, don't try to wrap it
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if (o == null)
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{
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return null;
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}
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// If it's public, leave it alone since the standard dynamic binder will work. Well, it won't work for
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// internal properties, but we're mostly concerned about supporting anonymous objects, which are never public
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if (o.GetType().IsPublic)
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{
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return o;
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}
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return new ReflectionDynamicObject() { RealObject = o };
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}
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// Called when a property is accessed
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public override bool TryGetMember(GetMemberBinder binder, out object result)
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{
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// Get the property info
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PropertyInfo propInfo = RealObject.GetType().GetProperty(
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binder.Name,
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BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.Public);
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if (propInfo == null)
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{
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// If there is no such property, return null instead of failing. This allows optional parameters
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result = null;
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}
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else
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{
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// Get the property value
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result = propInfo.GetValue(RealObject, null);
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// Wrap the sub object if necessary. This allows nested anonymous objects to work.
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result = WrapObjectIfInternal(result);
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}
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return true;
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}
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// Called when a method is called
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public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
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{
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result = RealObject.GetType().InvokeMember(
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binder.Name,
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BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
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null,
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RealObject,
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args,
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CultureInfo.InvariantCulture);
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return true;
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}
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// Called when the dynamic object needs to be converted to a non dynamic object
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public override bool TryConvert(ConvertBinder binder, out object result)
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{
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result = RealObject;
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return true;
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}
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public override string ToString()
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{
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// Just return the original object's display string
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return RealObject.ToString();
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}
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}
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}
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