81 lines
3.0 KiB
C#
81 lines
3.0 KiB
C#
|
// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
|
|||
|
|
|
|||
|
|
using System.Dynamic;
|
|||
|
|
using System.Web.WebPages.Resources;
|
|||
|
|
|
|||
|
|
namespace System.Web.WebPages
|
|||
|
|
{
|
|||
|
|
internal class DynamicHttpApplicationState : DynamicObject
|
|||
|
|
{
|
|||
|
|
private HttpApplicationStateBase _state;
|
|||
|
|
|
|||
|
|
public DynamicHttpApplicationState(HttpApplicationStateBase state)
|
|||
|
|
{
|
|||
|
|
_state = state;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public override bool TryGetMember(GetMemberBinder binder, out object result)
|
|||
|
|
{
|
|||
|
|
result = _state[binder.Name];
|
|||
|
|
// We return true here because HttpApplicationState returns null if the key is not
|
|||
|
|
// in the dictionary, so we simply pass on the returned value.
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public override bool TrySetMember(SetMemberBinder binder, object value)
|
|||
|
|
{
|
|||
|
|
_state[binder.Name] = value;
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
|
|||
|
|
{
|
|||
|
|
if (indexes == null || indexes.Length != 1)
|
|||
|
|
{
|
|||
|
|
throw new ArgumentException(WebPageResources.DynamicDictionary_InvalidNumberOfIndexes);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
result = null;
|
|||
|
|
string key = indexes[0] as string;
|
|||
|
|
if (key != null)
|
|||
|
|
{
|
|||
|
|
result = _state[key];
|
|||
|
|
}
|
|||
|
|
else if (indexes[0] is int)
|
|||
|
|
{
|
|||
|
|
result = _state[(int)indexes[0]];
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
// HttpApplicationState only supports keys of type string and int when getting values, so any attempt
|
|||
|
|
// to use other types will result in an error. We throw an exception here to explain to the user what is wrong.
|
|||
|
|
// Returning false will instead cause a runtime binder exception which might be confusing to the user.
|
|||
|
|
throw new ArgumentException(WebPageResources.DynamicHttpApplicationState_UseOnlyStringOrIntToGet);
|
|||
|
|
}
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public override bool TrySetIndex(SetIndexBinder binder, object[] indexes, object value)
|
|||
|
|
{
|
|||
|
|
if (indexes == null || indexes.Length != 1)
|
|||
|
|
{
|
|||
|
|
throw new ArgumentException(WebPageResources.DynamicDictionary_InvalidNumberOfIndexes);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
string key = indexes[0] as string;
|
|||
|
|
if (key != null)
|
|||
|
|
{
|
|||
|
|
_state[key] = value;
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
// HttpApplicationState only supports keys of type string when setting values, so any attempt
|
|||
|
|
// to use other types will result in an error. We throw an exception here to explain to the user what is wrong.
|
|||
|
|
// Returning false will instead cause a runtime binder error which might be confusing to the user.
|
|||
|
|
throw new ArgumentException(WebPageResources.DynamicHttpApplicationState_UseOnlyStringToSet);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|