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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.Web.Mvc.Async;
using System.Web.Mvc.Properties;
using System.Web.Routing;
using System.Web.WebPages.Scope;
namespace System.Web.Mvc
{
public abstract class ControllerBase : IController
{
private readonly SingleEntryGate _executeWasCalledGate = new SingleEntryGate();
private DynamicViewDataDictionary _dynamicViewDataDictionary;
private TempDataDictionary _tempDataDictionary;
private bool _validateRequest = true;
private IValueProvider _valueProvider;
private ViewDataDictionary _viewDataDictionary;
public ControllerContext ControllerContext { get; set; }
[SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly", Justification = "This property is settable so that unit tests can provide mock implementations.")]
public TempDataDictionary TempData
{
get
{
if (ControllerContext != null && ControllerContext.IsChildAction)
{
return ControllerContext.ParentActionViewContext.TempData;
}
if (_tempDataDictionary == null)
{
_tempDataDictionary = new TempDataDictionary();
}
return _tempDataDictionary;
}
set { _tempDataDictionary = value; }
}
public bool ValidateRequest
{
get { return _validateRequest; }
set { _validateRequest = value; }
}
public IValueProvider ValueProvider
{
get
{
if (_valueProvider == null)
{
_valueProvider = ValueProviderFactories.Factories.GetValueProvider(ControllerContext);
}
return _valueProvider;
}
set { _valueProvider = value; }
}
public dynamic ViewBag
{
get
{
if (_dynamicViewDataDictionary == null)
{
_dynamicViewDataDictionary = new DynamicViewDataDictionary(() => ViewData);
}
return _dynamicViewDataDictionary;
}
}
[SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly", Justification = "This property is settable so that unit tests can provide mock implementations.")]
public ViewDataDictionary ViewData
{
get
{
if (_viewDataDictionary == null)
{
_viewDataDictionary = new ViewDataDictionary();
}
return _viewDataDictionary;
}
set { _viewDataDictionary = value; }
}
protected virtual void Execute(RequestContext requestContext)
{
if (requestContext == null)
{
throw new ArgumentNullException("requestContext");
}
if (requestContext.HttpContext == null)
{
throw new ArgumentException(MvcResources.ControllerBase_CannotExecuteWithNullHttpContext, "requestContext");
}
VerifyExecuteCalledOnce();
Initialize(requestContext);
using (ScopeStorage.CreateTransientScope())
{
ExecuteCore();
}
}
protected abstract void ExecuteCore();
protected virtual void Initialize(RequestContext requestContext)
{
ControllerContext = new ControllerContext(requestContext, this);
}
internal void VerifyExecuteCalledOnce()
{
if (!_executeWasCalledGate.TryEnter())
{
string message = String.Format(CultureInfo.CurrentCulture, MvcResources.ControllerBase_CannotHandleMultipleRequests, GetType());
throw new InvalidOperationException(message);
}
}
#region IController Members
void IController.Execute(RequestContext requestContext)
{
Execute(requestContext);
}
#endregion
}
}
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