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namespace System.Web.Mvc {
using System;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.Web.Mvc.Async;
using System.Web.Mvc.Resources;
using System.Web.Routing;
using System.Web.WebPages;
using System.Web.WebPages.Scope;
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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