I've create a custom attribute for my web pages... In the base page class I've created I'm trying to pull if that attribute has been set. Unfortunately it does not come back as part of the GetCustomAttributes function. Only if I explicitly use the typeof(myclass) to create the class. I have a feeling it's due to how asp.net classes are generated. Anyone have any suggestions on how to get this to work?
namespace SecuritySample.SecurityCode
{
[AttributeUsage(AttributeTargets.All, Inherited = false, AllowMultiple = true)]
public sealed class MHCSecurityAttribute : Attribute
{
private string _permissionSet;
private bool _viewable;
public MHCSecurityAttribute(string permission, bool viewable)
{
_permissionSet = permission;
_viewable = viewable;
}
public string PermissionSetRequired
{
get { return _permissionSet; }
}
public bool Viewable
{
get { return _viewable; }
}
}
}
AdminOnly class
using System;
using SecuritySample.SecurityCode;
namespace SecuritySample
{
[MHCSecurityAttribute("testpermission", false)]
public partial class AdminOnlyPage : BasePage, IMHCSecurityControl
{
protected void Page_Load(object sender, EventArgs e)
{
}
public void DisableControl()
{
Server.Transfer("Error.aspx");
}
public void EnableControl()
{
}
}
}
BasePage class
using System.Web.UI.WebControls;
namespace SecuritySample.SecurityCode
{
public class BasePage : Page
{
private string _user;
protected override void OnLoadComplete(EventArgs e)
{
base.OnLoadComplete(e);
_user = string.Empty;
if (Session.Contents["loggedInUser"] != null)
_user = Session["loggedInUser"].ToString();
// perform security check
// check page level
if (this is IMHCSecurityControl)
{
System.Reflection.MemberInfo info = this.GetType();
object[] attributes = info.GetCustomAttributes(false);
bool authorized = false;
if ((attributes != null) && (attributes.Length > 0))
{
foreach(MHCSecurityAttribute a in attributes)
{
if ((MHCSecurityCheck.IsAuthorized(_user, a.PermissionSetRequired)))
{
((IMHCSecurityControl) this).EnableControl();
authorized = true;
break;
}
}
if (!authorized)
((IMHCSecurityControl)this).DisableControl();
}
}
}
}
}
You have set the AttributeUsage.Inherited member to false. When set to false the attribute is not inherited by classes that inherit from your class (which is how Pages/Controls work in ASP.NET). This is why when you explicitly use typeof(your class name) the attribute is found.
Related
I'm using a webview in my Xamarin Forms project with Hybrid Renderer and webview, because I have to inject javascript code inside the page.
In my main project I have a CustomWebview.cs:
namespace ClotureSiadForms.Renderer
{
public class CustomWebView : WebView
{
public string js = "";
public CustomWebView()
{
Navigating+= WebViewNavigating;
Navigated+=WebViewNavigated;
}
private void WebViewNavigated(object sender, WebNavigatedEventArgs args)
{
EvaluateJavaScriptAsync(js);
}
public void WebViewNavigating(object sender, WebNavigatingEventArgs args)
{
if (args.Url.StartsWith("tel:"))
{
var tel = args.Url.Split(':')[1];
args.Cancel = true;
Xamarin.Essentials.PhoneDialer.Open(tel);
}
else if (!args.Url.StartsWith("http") || args.Url.EndsWith(".apk") || args.Url.EndsWith(".pdf") || args.Url.EndsWith(".zip"))
{
args.Cancel = true;
Xamarin.Essentials.Launcher.OpenAsync(args.Url);
}
}
}
}
In my Android project I have a HybridWebViewRenderer.cs:
[assembly: ExportRenderer(typeof(CustomWebView), typeof(HybridWebViewRenderer))]
namespace ClotureSiadForms.Droid.Renderer
{
internal class HybridWebViewRenderer : WebViewRenderer
{
public HybridWebViewRenderer(Context context) : base(context)
{
}
protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.WebView> e)
{
base.OnElementChanged(e);
if (Control != null)
{
CustomWebView webview = e.NewElement as CustomWebView;
Control.Settings.JavaScriptEnabled = true;
Control.Settings.DomStorageEnabled = true;
Control.Settings.SavePassword = true;
}
}
}
}
As is, it worked and was able to download files
But as I needed basic authentication, I added a custom webviewclient inside HybridWebViewRenderer.cs:
protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.WebView> e)
{
base.OnElementChanged(e);
if (Control != null)
{
CustomWebView webview = e.NewElement as CustomWebView;
Control.Settings.JavaScriptEnabled = true;
Control.Settings.DomStorageEnabled = true;
Control.Settings.SavePassword = true;
var login = Preferences.Get("login", "");
var password = Preferences.Get("password", "");
Control.SetWebViewClient(new AuthWebViewClient(login, password));
}
}
public class AuthWebViewClient : WebViewClient
{
private string Username;
private string Password;
public AuthWebViewClient(string username, string password)
{
Username = username;
Password = password;
}
public override void OnReceivedHttpAuthRequest(Android.Webkit.WebView view, HttpAuthHandler handler, string host, string realm)
{
handler.Proceed( Username,Password);
}
}
And authentication works, but WebViewNavigating is now called once, then the custom client is set and then WebViewNavigating is never more called.
Then my question is, can't I use basic auth without a custom client or is there a way to keep using my customwebview with the client ?
And authentication works, but WebViewNavigating is now called once, then the custom client is set and then WebViewNavigating is never more called.
I tested the code you provided and added Breakpoint to WebViewNavigating method. Even if you do not add webviewclient, it will only call WebViewNavigating once.
You can put the code in WebViewNavigating to ShouldInterceptRequest:
public class AuthWebViewClient : WebViewClient
{
...
public override WebResourceResponse ShouldInterceptRequest(Android.Webkit.WebView view, IWebResourceRequest request)
{
var url = request.Url;
...
}
}
Whenever the WebView begins loading a new page, it will call ShouldInterceptRequest.
This seems like a simple thing - I want to use a WebView to load / run some JavaScript from a 3rd party.
When I load the page I get a message saying "You must allow popups for this to work". I think I need to create a custom WebView (for iOS and Android!?) and I assume I need one in the shared project too?
I added this to my Android project:
using Android.Content;
using MyApp.Custom;
using MyApp.Droid.Custom;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;
[assembly: ExportRenderer(typeof(CustomWebView), typeof(CustomWebViewRenderer))]
namespace MyApp.Droid.Custom
{
public class CustomWebViewRenderer : WebViewRenderer
{
public CustomWebViewRenderer(Context context) : base(context)
{
}
protected override void OnElementChanged(ElementChangedEventArgs<WebView> e)
{
base.OnElementChanged(e);
Control.Settings.JavaScriptCanOpenWindowsAutomatically = true;
Control.Settings.JavaScriptEnabled = true;
}
}
}
and this to my shared project
using Xamarin.Forms;
namespace MyKRing.Custom
{
public class CustomWebView : WebView
{
}
}
and then used "CustomWebView" in my XAML.
<custom:CustomWebView x:Name="WebView"
HeightRequest="1000"
Source="{Binding WebViewContent}"
WidthRequest="1000" />
My TestPageViewModel has
public WebViewSource WebViewContent
{
get => _webViewContent;
set => SetProperty(ref _webViewContent, value);
}
public TestPageViewModel()
{
AmountEntryFrameVisible = true;
NuapayFrameVisible = false;
ConfirmLoadCommand = new Command(ExecuteConfirmLoadCommand);
var localHtml = new HtmlWebViewSource();
localHtml.Html = #"<html>
<body>
<p>This is a test</p>
<script src='https://testurl.com/test.js\'></script>
<script>
TestJS.showUI('1234567890', 'https://testurl.com/ui/');
</script>
</body>
</html>";
WebViewContent = localHtml;
}
With the aim of making the JS run when the page is loaded by WebView.
Am I anywhere close? What is wrong with the above, as it just doesn't do anything (that ( can see).
1. Create the CustomWebView and create the ShowDialog method.
public class CustomWebView : WebView
{
Action<string> action;
public static readonly BindableProperty UriProperty = BindableProperty.Create(
propertyName: "Uri",
returnType: typeof(string),
declaringType: typeof(CustomWebView ),
defaultValue: default(string));
public string Uri
{
get { return (string)GetValue(UriProperty); }
set { SetValue(UriProperty, value); }
}
public void RegisterAction(Action<string> callback)
{
action = callback;
}
public void Cleanup()
{
action = null;
}
public void ShowDialog(string data)
{
if (action == null || data == null)
{
return;
}
action.Invoke(data);
}
}
2. Consume the CustomWebView
<local:CustomWebView x:Name="customWebView " Uri="index.html" />
3. Register the ShowDiaplg action to be invoked from JavaScript
customWebView.RegisterAction(data => DisplayAlert("Alert", DateTime.Now + "/n" + data, "OK"));
4. Create the custom renderer on Android platform.
CustomWebViewRenderer .cs:
[assembly: ExportRenderer(typeof(CustomWebView ), typeof(CustomWebViewRenderer))]
namespace CustomRenderer.Droid
{
public class CustomWebViewRenderer: WebViewRenderer
{
const string JavascriptFunction = "function invokeCSharpAction(data){jsBridge2.showDialog(data);}";
Context _context;
public CustomWebViewRenderer (Context context) : base(context)
{
_context = context;
}
protected override void OnElementChanged(ElementChangedEventArgs<WebView> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
Control.RemoveJavascriptInterface("jsBridge");
((CustomWebView )Element).Cleanup();
}
if (e.NewElement != null)
{
Control.SetWebViewClient(new JavascriptWebViewClient2(this, $"javascript: {JavascriptFunction}"));
Control.AddJavascriptInterface(new JSBridge2(this), "jsBridge2");
Control.LoadUrl($"file:///android_asset/Content/{((CustomWebView )Element).Uri}");
}
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
((CustomWebView )Element).Cleanup();
}
base.Dispose(disposing);
}
}
}
JavascriptWebViewClient2.cs:
public class JavascriptWebViewClient2 : FormsWebViewClient
{
string _javascript;
public JavascriptWebViewClient2(CustomWebViewRenderer renderer, string javascript) : base(renderer)
{
_javascript = javascript;
}
public override void OnPageFinished(WebView view, string url)
{
base.OnPageFinished(view, url);
view.EvaluateJavascript(_javascript, null);
}
}
JSBridge2.cs:
public class JSBridge2 : Java.Lang.Object
{
readonly WeakReference<CustomWebViewRenderer > hybridWebViewRenderer;
public JSBridge2(CustomWebViewRenderer hybridRenderer)
{
hybridWebViewRenderer = new WeakReference<CustomWebViewRenderer >(hybridRenderer);
}
[JavascriptInterface]
[Export("showDialog")]
public void ShowDialog(string data)
{
CustomWebViewRenderer hybridRenderer;
if (hybridWebViewRenderer != null && hybridWebViewRenderer.TryGetTarget(out hybridRenderer))
{
((CustomWebView)hybridRenderer.Element).ShowDialog(data);
}
//string ret = "Alert :" + DateTime.Now;
//return ret;
}
}
I followed the code sample in the link below. https://learn.microsoft.com/en-us/samples/xamarin/xamarin-forms-samples/customrenderers-hybridwebview/
I would like to understand why the variable IgnoreRequest is always false after setting it to true in my web api 2.2.
The filter:
public class RestrictToCandidatePlus : ActionFilterAttribute
{
public virtual bool IgnoreRequest { get; set; }
public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext actionContext)
{
bool validAccType = 2 == 1; //original code hidden
if (!IgnoreRequest && !validAccType)
{
HandleUnauthorizedRequest(actionContext);
return;
}
base.OnActionExecuting(actionContext);
}
private void HandleUnauthorizedRequest(System.Web.Http.Controllers.HttpActionContext actionContext)
{
actionContext.Response = actionContext.Request.CreateResponse<String>(HttpStatusCode.Unauthorized, "Invalid account type");
}
}
And the controller:
[Filter1]
[Filter2]
[RestrictToCandidatePlus]
public class PlusCandidateController : ApiController
{
[RestrictToCandidatePlus(IgnoreRequest = true)]
[HttpPost]
public HttpResponseMessage SetInterest([FromBody] SetInterestModel model)
{
//some logic
return Request.CreateResponse(HttpStatusCode.OK);
}
}
I have exactly the same logic with the filters on my MVC5 application and it works like charm. I understand that filters in MVC are not the same used in the Web Api, but I think that I should be able to set the IgnoreRequest variable to true.
As you can see, I cannot use OverrideActionFiltersAttribute, otherwise it will disable Filter1 and Filter2, which is not what I want.
IgnoreRequest is always false because the controller level attribute is being evaluated first and you are error handling out before can evaluate the action attribute..
Instead of using a bool to override or block your attribute evaluation you can override the ActionFilterAttribute by using OverrideActionFiltersAttribute.
This will override any attribute inheriting from ActionFilterAttribute defined at the controller level.
Here is an updated attribute:
public class RestrictToCandidatePlus : ActionFilterAttribute
{
// dont need this
//public virtual bool IgnoreRequest { get; set; }
public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext actionContext)
{
bool validAccType = 2 == 1; //original code hidden
//if (!IgnoreRequest && !validAccType)
if(!validAccType)
{
HandleUnauthorizedRequest(actionContext);
return;
}
base.OnActionExecuting(actionContext);
}
private void HandleUnauthorizedRequest(System.Web.Http.Controllers.HttpActionContext actionContext)
{
actionContext.Response = actionContext.Request.CreateResponse<String>(HttpStatusCode.Unauthorized, "Invalid account type");
}
}
Updated controller:
[RestrictToCandidatePlus]
public class PlusCandidateController : ApiController
{
[OverrideActionFiltersAttribute]// <== new attribute here
[HttpPost]
public HttpResponseMessage SetInterest([FromBody] SetInterestModel model)
{
//some logic
return Request.CreateResponse(HttpStatusCode.OK);
}
}
You can create your own attribute class inheriting from OverrideActionFiltersAttribute if you want to give it your own name like [OverrideCandidatePlus].
There is a great blog post here that explains how this works.
Note:
I have tested this with WebApi 2.2
I finally found the issue. The problem was that the same filter was running twice, starting from the Action (HttpResponseMessage) then the Controller. So if I set the IgnoreRequest = true in the controller level I could see the value set to true.
But the main problem was that the filter was running twice, so to fix this I had to override the following property:
public class RestrictToCandidatePlus : ActionFilterAttribute
{
public virtual bool IgnoreRequest { get; set; }
public override bool AllowMultiple { get { return false; } } // <= HERE!
public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext actionContext)
{
bool validAccType = 2 == 1; //original code hidden
if (!IgnoreRequest && !validAccType)
{
HandleUnauthorizedRequest(actionContext);
return;
}
base.OnActionExecuting(actionContext);
}
private void HandleUnauthorizedRequest(System.Web.Http.Controllers.HttpActionContext actionContext)
{
actionContext.Response = actionContext.Request.CreateResponse<String>(HttpStatusCode.Unauthorized, "Invalid account type");
}
}
I was following this example
example code:
public class Global : HttpApplication
{
private Poster _posterDetails;
private Posting _postingDetails;
private Property _propertyDetails;
protected void Application_PostRequestHandlerExecute(object sender, EventArgs e)
{
if (HttpContext.Current.Session == null) return;
_posterDetails = HttpContext.Current.Session["Poster"] as Poster;
_postingDetails = HttpContext.Current.Session["Posting"] as Posting;
_propertyDetails = HttpContext.Current.Session["Property"] as Property;
}
}
these session variables are littered throughout the app and I need to abstract the retrieval of them. Say, later I get them from a db instead of the current session.
Session is baked into the Page or Context. How do I inject that dependency into the concrete implementation of a possible current property getter.
Create an abstraction around HttpContext:
public interface IHttpContextFactory
{
HttpContextBase Create();
}
public class HttpContextFactory
: IHttpContextFactory
{
public HttpContextBase Create()
{
return new HttpContextWrapper(HttpContext.Current);
}
}
Then inject it into a specialized service for these settings.
public interface ISettings
{
T GetValue<T>(string key);
void SetValue<T>(string key, T value);
}
public class ContextSettings
: ISettings
{
private readonly IHttpContextFactory httpContextFactory;
private HttpContextBase context;
public RequestCache(
IHttpContextFactory httpContextFactory
)
{
if (httpContextFactory == null)
throw new ArgumentNullException("httpContextFactory");
this.httpContextFactory = httpContextFactory;
}
protected HttpContextBase Context
{
get
{
if (this.context == null)
{
this.context = this.httpContextFactory.Create();
}
return context;
}
}
public virtual T GetValue<T>(string key)
{
if (this.Context.Session.Contains(key))
{
return (T)this.Context.Session[key];
}
return default(T);
}
public virtual void SetValue<T>(string key, T value)
{
this.Context.Session[key] = value;
}
}
It will later be possible to replace the service with another storage mechanism by implementing ISettings and providing different constructor dependencies. Note that changing the constructor signature does not require a different interface.
That said, you should provide another service (or perhaps more than one) that takes ISettings as a dependency so you can make explicit properties. You should aim to provide focused sets of related properties for specific purposes. Your application also shouldn't have to know the type of property in order to retrieve its value - it should just call a property that hides those details.
public class SomeSettingsService: ISomeSettingsService
{
private readonly ISettings settings;
public SomeSettingsService(ISettings settings)
{
if (settings == null)
throw new ArgumentNullException("settings");
this.settings = settings;
}
public Poster Poster
{
get { return this.settings.GetValue<Poster>("Poster"); }
set { this.settings.SetValue<Poster>("Poster", value); }
}
public Posting Posting
{
get { return this.settings.GetValue<Posting>("Posting"); }
set { this.settings.SetValue<Posting>("Posting", value); }
}
public Property Property
{
get { return this.settings.GetValue<Property>("Property"); }
set { this.settings.SetValue<Property>("Property", value); }
}
}
Not sure if this is what you are asking... What I often do is create a service:
public interface ISessionService
{
object Get(string key);
void Save(string key, object value);
}
And then I implement this, which calls HttpContext.Current.Session[key] and returns the value. It shouldn't be hard to create a Get<T>(string key) to return an object either. Break all of your dependencies to use this (which is the hard part).
There is no seamless way to break the dependency... it has to be through a manual change.
I want to create a custom server control which looks like this:
<cc:MyControl prop1="a" prop2="b">
<cc:MyItem name="xxx">
<cc:MyItem name="yyy">
<cc:MyItem name="zzz">
</cc:MyControl>
MyControl is of course implemented as a server control, however I do not want MyItem to be child controls. Rather they should exist as simple .Net objects. I have a class called MyItem, and the control has a property called Items, and when MyItem elements are declared in the markup, the objects should be instantiated and added to the collection.
The tutorials on MSDN don't actually explain how this happens. See: http://msdn.microsoft.com/en-us/library/9txe1d4x.aspx
I'd like to know:
How is <cc:MyItem> mapped to the MyItem class? Does the element in the markup have to have the same name as the object's class?
Which constructor of MyItem is called when MyItems are added declaratively, and when?
What collection types am I permitted to use to hold MyItem objects? The link above uses ArrayList, but can I use the strongly typed List instead?
Is it possible for a control to contain multiple collections?
It is so common to use class name for markup, but you can assign another name if you want, I do not explain more, if you want please comment
when asp.net compiles markup, it uses default parameter less constructor
you can use any collection type but if you want to use benefits of viewstate your collection type must implement IStateManager interface (below I wrote source of collection that I created for my self with state managing support)
Yes, your control can have multiple collections, just add required attributes as below:
(I used one of my codes, please replace names with your desired name)
if you want to have collection first of all you must define its property in your control.
imagine we have a control named CustomControl that extends Control as below:
[System.Web.UI.ParseChildrenAttribute(true)]
[System.Web.UI.PersistChildrenAttribute(false)]
public class CustomControl : Control{
private GraphCollection m_graphs;
[Bindable(false)]
[Category("Appearance")]
[DefaultValue("")]
[Localizable(true)]
[PersistenceMode(PersistenceMode.InnerProperty)]
public GraphCollection Graphs
{
get
{
if (this.m_graphs == null) {
this.m_graphs = new GraphCollection();
if (base.IsTrackingViewState) {
this.m_graphs.TrackViewState();
}
}
return this.m_graphs;
}
}
}
as you can see in above code, CustomControl has a field with name "m_graphs" with type of "GraphCollection", also a property that exposes this field
also please please pay attention to its attribute PersistenceMode that says to asp.net property "Graphs" must persisted as InnerProperty
also please pay attention to two attributes applied to CustomControl class
attribute ParseChildrenAttribute says to asp.net that nested markup, must be treated as properties and attribute PersistChildrenAttribute says to asp.net that nested markups are not control's children
at the final, I bring two source codes for state managing components
first of all GraphCollection that extends from StateManagedCollection (both classes was written by me)
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Web.UI;
namespace Farayan.Web.Core
{
public class StateManagedCollection<T> : IList, ICollection, IEnumerable, IEnumerable<T>, IStateManager
where T : class, IStateManager, new()
{
// Fields
private List<T> listItems = new List<T>();
private bool marked = false;
private bool saveAll = false;
// Methods
public void Add(T item)
{
this.listItems.Add(item);
if (this.marked) {
//item.Dirty = true;
}
}
public void AddRange(T[] items)
{
if (items == null) {
throw new ArgumentNullException("items");
}
foreach (T item in items) {
this.Add(item);
}
}
public void Clear()
{
this.listItems.Clear();
if (this.marked) {
this.saveAll = true;
}
}
public bool Contains(T item)
{
return this.listItems.Contains(item);
}
public void CopyTo(Array array, int index)
{
this.listItems.CopyTo(array.Cast<T>().ToArray(), index);
}
public IEnumerator GetEnumerator()
{
return this.listItems.GetEnumerator();
}
public int IndexOf(T item)
{
return this.listItems.IndexOf(item);
}
public void Insert(int index, T item)
{
this.listItems.Insert(index, item);
if (this.marked) {
this.saveAll = true;
}
}
public void LoadViewState(object state)
{
object[] states = state as object[];
if (state == null || states.Length == 0)
return;
for (int i = 0; i < states.Length; i++) {
object itemState = states[i];
if (i < Count) {
T day = (T)listItems[i];
((IStateManager)day).LoadViewState(itemState);
} else {
T day = new T();
((IStateManager)day).LoadViewState(itemState);
listItems.Add(day);
}
}
}
public void Remove(T item)
{
int index = this.IndexOf(item);
if (index >= 0)
this.RemoveAt(index);
}
public void RemoveAt(int index)
{
this.listItems.RemoveAt(index);
if (this.marked) {
this.saveAll = true;
}
}
public object SaveViewState()
{
List<object> state = new List<object>(Count);
foreach (T day in listItems)
state.Add(((IStateManager)day).SaveViewState());
return state.ToArray();
}
int IList.Add(object item)
{
T item2 = (T)item;
this.listItems.Add(item2);
return listItems.Count - 1;
}
bool IList.Contains(object item)
{
return this.Contains((T)item);
}
int IList.IndexOf(object item)
{
return this.IndexOf((T)item);
}
void IList.Insert(int index, object item)
{
this.Insert(index, (T)item);
}
void IList.Remove(object item)
{
this.Remove((T)item);
}
void IStateManager.LoadViewState(object state)
{
this.LoadViewState(state);
}
object IStateManager.SaveViewState()
{
return this.SaveViewState();
}
void IStateManager.TrackViewState()
{
this.TrackViewState();
}
public void TrackViewState()
{
this.marked = true;
for (int i = 0; i < this.Count; i++) {
((IStateManager)this[i]).TrackViewState();
}
}
// Properties
public int Capacity
{
get
{
return this.listItems.Capacity;
}
set
{
this.listItems.Capacity = value;
}
}
public int Count
{
get
{
return this.listItems.Count;
}
}
public bool IsReadOnly
{
get
{
return false;
}
}
public bool IsSynchronized
{
get
{
return false;
}
}
public T this[int index]
{
get
{
return (T)this.listItems[index];
}
}
public object SyncRoot
{
get
{
return this;
}
}
bool IList.IsFixedSize
{
get
{
return false;
}
}
object IList.this[int index]
{
get
{
return this.listItems[index];
}
set
{
this.listItems[index] = (T)value;
}
}
bool IStateManager.IsTrackingViewState
{
get
{
return this.marked;
}
}
#region IEnumerable<T> Members
IEnumerator<T> IEnumerable<T>.GetEnumerator()
{
return this.listItems.GetEnumerator();
}
#endregion
#region IEnumerable Members
IEnumerator IEnumerable.GetEnumerator()
{
return this.GetEnumerator();
}
#endregion
}
}
and GraphCollection
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Farayan.Web.Core;
namespace Farayan.Web.AmCharts
{
public class GraphCollection : StateManagedCollection<Graph>
{
}
}
and finally Graph in our example:
using System;
using System.Linq;
using System.Collections.ObjectModel;
using System.Drawing;
using System.Web.UI;
using System.ComponentModel;
using Farayan.Web.AmCharts;
using System.Collections.Generic;
using Farayan.Web.Controls;
using System.Runtime;
using Farayan.Web.Core;
namespace Farayan.Web.AmCharts
{
public class Graph : StateManager
{
#region Colorize Property
[Browsable(true)]
[Localizable(false)]
[PersistenceMode(PersistenceMode.Attribute)]
[DefaultValue(false)]
public virtual bool Colorize
{
get { return ViewState["Colorize"] == null ? false : (bool)ViewState["Colorize"]; }
set { ViewState["Colorize"] = value; }
}
#endregion
//==============================
public override void LoadViewState(object state)
{
base.LoadViewState(state);
}
public override object SaveViewState()
{
return base.SaveViewState();
}
}
}
you may noticed that Graph extends StateManager class
using System;
using System.Collections;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Web.UI;
using Farayan.Web.AmCharts;
namespace Farayan.Web.AmCharts
{
public class StateManager : IStateManager
{
protected StateBag ViewState = new StateBag();
#region IStateManager Members
public virtual bool IsTrackingViewState
{
get { return true; }
}
public virtual void LoadViewState(object state)
{
if (state != null) {
ArrayList arrayList = (ArrayList)state;
for (int i = 0; i < arrayList.Count; i += 2) {
string value = ((IndexedString)arrayList[i]).Value;
object value2 = arrayList[i + 1];
ViewState.Add(value, value2);
}
}
}
public virtual object SaveViewState()
{
ArrayList arrayList = new ArrayList();
if (this.ViewState.Count != 0) {
IDictionaryEnumerator enumerator = this.ViewState.GetEnumerator();
while (enumerator.MoveNext()) {
StateItem stateItem = (StateItem)enumerator.Value;
//if (stateItem.IsDirty) {
if (arrayList == null) {
arrayList = new ArrayList();
}
arrayList.Add(new IndexedString((string)enumerator.Key));
arrayList.Add(stateItem.Value);
//}
}
}
return arrayList;
}
public virtual void TrackViewState()
{
}
#endregion
#region IStateManager Members
bool IStateManager.IsTrackingViewState
{
get { return this.IsTrackingViewState; }
}
void IStateManager.LoadViewState(object state)
{
this.LoadViewState(state);
}
object IStateManager.SaveViewState()
{
return this.SaveViewState();
}
void IStateManager.TrackViewState()
{
this.TrackViewState();
}
#endregion
}
}