So, this is what we want to do: We want to have a generic web part with a custom frame around it and then dynamically load other web parts (frameless) inside it. Would this at all be possible you think? A bit like Jan Tielens SmartPart, only not for ASP.Net User Controls, but for other Web parts... ;)
Edit: We've been able to do this now. The solution was actually pretty simple. Check out the code:
public class WebPartWrapper : System.Web.UI.WebControls.WebParts.WebPart {
protected override void CreateChildControls() {
Panel pnl = new Panel();
this.Controls.Add(pnl);
WebPart dynamicPart = WebPartFactory.CreateWebPart("RSSViewer");
pnl.Controls.Add(dynamicPart);
}
}
Easy as that... We also use reflection to store the webparts as Xml etc., but that's beside the point.
I don't think so. I tried this a while back and it complained about only being able to add WebPartZone items in Page Init. I think by the time it get's to initialising your "container" WebPart it's too late to add more zones as the holding page has already been initialised.
public class WebPartWrapper : System.Web.UI.WebControls.WebParts.WebPart {
protected override void CreateChildControls() {
Panel pnl = new Panel();
this.Controls.Add(pnl);
var factory = new WebPartFactory()
WebPart dynamicPart = factory.CreateWebPart("RSSViewer", this.Guid);
pnl.Controls.Add(dynamicPart);
}
}
public class WebPartFactory {
public WebPart CreateWebpart(string webpartName, Guid parentWebPartGuid)
{
var config = ConfigurationFactory.LoadConfiguration(webpartName);
Assembly webPartAssembly = Assembly.Load(config.Assembly);
Type webPartType = webPartAssembly.GetType(config.Class);
object actualWebPart = Activator.CreateInstance(webPartType);
foreach (var item in config.Properties)
{
PropertyInfo webPartProperty = webPartType.GetProperty(item.Name);
object webPartPropertyValue = Convert.ChangeType(itemValue, Type.GetType(item.Type));
if (!String.IsNullOrEmpty(item.Value))
webPartProperty.SetValue(actualWebPart, webPartPropertyValue, null);
}
RunMethod("set_StorageKeyInternal", actualWebPart, new object[] { parentWebPartGuid });
return actualWebPart as WebPart;
}
private void RunMethod(string methodName, object objectInstance, object[] methodParameters)
{
BindingFlags flags = BindingFlags.Instance | BindingFlags.Public |
BindingFlags.NonPublic;
Type t = objectInstance.GetType();
MethodInfo m = GetMethod(t, methodName, flags);
if (m != null)
{
m.Invoke(objectInstance, methodParameters);
}
}
private MethodInfo GetMethod(Type instanceType, string methodName, BindingFlags flags)
{
MethodInfo m = instanceType.GetMethod(methodName, flags);
if (m != null)
{
return m;
}
if (instanceType.GetType() == typeof(object) || instanceType.BaseType == null)
{
return null;
}
return GetMethod(instanceType.BaseType, methodName, flags);
}
}
This code needs some explaining... Please excuse me if it does not compile, I had to remove a fair bit of the original code, it was very implementation specific stuff. I've not shown the "config" class either, it's just a container for configuration of webparts, just a bunch of properties. There are 2 issues I'd like to discuss in more detail:
parentWebPartGuid - This is the Guid (UniqueId?) of the hosting webpart. For some reason we have to set "StorageKeyInternal" to this value, using reflection (it's a private property). You can possibly get away with not setting it, but at least for the majority of webparts we had to set it.
config.Properties - This is the config values (we set them in a custom .xml file, but feel free to get this from anywhere). It can look a little like this..
In our framework we also support stuff like dynamic property values etc., but that's for another day... Hope this all makes sense and can help somebody.
There are (at least) two ways to do this: using iframe HTML element, or just a div whose content is changed by JavaScript (probably with Ajax).
[NOTE] My answer is generic (ie. on Web design side), I have no idea how it in your technical context, so maybe I should delete this answer...
No chance on getting the source for the WebPartFactory class is there? Or maybe a bit more information about it? Pseudo code maybe? If a custom web part is in the gallery it could be referenced in the same way as RSSViewer is correct? I'm just not really sure how to go about doing what you have done here, and I would very much like to better understand how to do this.
Thanks!
When a want to instantiate a custom webpart inside another custom webpart i use the following code in the .ascx
<%# Register tagPrefix="uc1" Namespace="Megawork.Votorantim.Intranet.Webparts_Intranet.LikeButton" Assembly="Megawork.Votorantim.Intranet, Version=1.0.0.0, Culture=neutral, PublicKeyToken=769156d154035602" %>
The Namespace value and the Assembly value can be copied from the SafeControls line from the webconfig or from the package file (in manifest tab) :)
When i want to instantiate it dinammicaly (in fact) is use the following code in the .cs
//This is the namespace of the control that will be instantiated dinamically
string type = "My.Custom.Namespace.WebpartToBeAdded.WebpartToBeAdded";
// Instantiate the control dinamically based on his type
System.Web.UI.WebControls.WebParts.WebPart genericWP = (System.Web.UI.WebControls.WebParts.WebPart)Activator.CreateInstance(Type.GetType(type));
// sets the page to the genericWP (i dont know if this is required)
genericWP.Page = this.Page;
// Note: if you want to call custom methods of the dinamically instantiated controls (like a custom load method) you will need to create an interface and make your dinamically instantiated webpart implement it. You will need to do it in that file that have the following code: private const string _ascxPath #"~/_CONTROLTEMPLATES/...". Then you can do the following
//IMyInterface ig = (IMyInterface)genericWP;
//ig.MyCustomLoadMethod(someParam);
// Adds the controls to a container, an asp panel by example.
panelDinamicControls.Controls.Add(genericWP);
Related
I want to disable Orchard Content Part buttons (Save and Publish Now) in the EDITOR template (when Content Item is created) based on some conditions. Can I do that ? How do I access the buttons in the EDITOR view.
Here are come examples,
To build a content fully from a Controller example, taken from the Blog Module
public ActionResult Create() {
if (!Services.Authorizer.Authorize(Permissions.ManageBlogs, T("Not allowed to create blogs")))
return new HttpUnauthorizedResult();
BlogPart blog = Services.ContentManager.New<BlogPart>("Blog");
if (blog == null)
return HttpNotFound();
dynamic model = Services.ContentManager.BuildEditor(blog);
// Casting to avoid invalid (under medium trust) reflection over the protected View method and force a static invocation.
return View((object)model);
}
[HttpPost, ActionName("Create")]
public ActionResult CreatePOST() {
if (!Services.Authorizer.Authorize(Permissions.ManageBlogs, T("Couldn't create blog")))
return new HttpUnauthorizedResult();
var blog = Services.ContentManager.New<BlogPart>("Blog");
_contentManager.Create(blog, VersionOptions.Draft);
dynamic model = _contentManager.UpdateEditor(blog, this);
if (!ModelState.IsValid) {
_transactionManager.Cancel();
// Casting to avoid invalid (under medium trust) reflection over the protected View method and force a static invocation.
return View((object)model);
}
_contentManager.Publish(blog.ContentItem);
return Redirect(Url.BlogForAdmin(blog));
}
BuidEditor does the work for you.
And you should use a alternative version of this template, but remove the edit link and publish link.
Note, you need a route for you custom create action, and a menu link on the dashboard may come in handy.
I need a custom binding and I know when and where but I don't know how I can do it. This is the relation of the view in my custom binding. Think about the *Views like controls.
I have the connections from ViewModel->ContainerView->FirstView but I can't connect it with the TableView. To connect the ContainerView to FirstView I did a custom binding (in one direction for now). And in the setvalue method I call the firstview's method SetBinding (where I want to do the binding)
I tried a few option but nothing happens, the last one looks like this:
public GolferList CurrentGolferList { get; set; }
public void SetBinding(GolferList golferList){
this.CurrentGolferList = golferList;
TableSource = new TableSourcePlayers(TableViewPlayers);
var bindingDescription = new[]{
new MvxBindingDescription {TargetName = "ItemsSource",SourcePropertyPath = "CurrentGolferList"} ,
};
Binder.Bind(this,TableSource, bindingDescription);
TableViewPlayers.Source = TableSource;
TableViewPlayers.ReloadData();
}
I would be grateful if you could tell me another way to handle it.
Update:
I followed Stuart's link and now it works fine, thanks a lot Stuart!
Actually, in my scheme the TableView is a MvxSimpleBindableTableViewSource and I want to bind the data there. So in order to make it work, I used the code below (SetBinding needs some external refactor):
private List<IMvxUpdateableBinding> bindings;
private string BindingText = "{'ItemsSource':{'Path':'CurrentGolfers'}}";
public object DataContext {
get { return dataContext; }
set { dataContext = value;
if (bindings == null)
bindings = this.GetService<IMvxBinder>().Bind(dataContext, TableSource, BindingText).ToList();
else
bindings.ForEach(b => b.DataContext = dataContext);
}
}
public void SetBinding(GolferList golferList){
this.DataContext = PlayViewModel;
tableView.Source = TableSource;
tableView.ReloadData();
}
Note that BindingText points to the table, not to the view itself.
Update 2
Now in V3 it's a bit different. First, the view must implement IMvxBindable and this members:
public object DataContext
{
get { return BindingContext.DataContext; }
set { BindingContext.DataContext = value; }
}
public IMvxBindingContext BindingContext { get; set; }
(Don't forget dispose calling BindingContext.ClearAllBindings() and also call to CreateBindingContext() in the viewload )
And then you'll be able to bind in your class. In my case:
var set = this.CreateBindingSet<FirstPlayViewController, PlayViewModel>();
set.Bind(source).To(vm => vm.CurrentGolfers).Apply(); //I love the new fluent api :)
I think what you want to do is actual a data-bound View, rather than a custom binding.
This is covered in this question - Custom bindable control in a MvvmCross Touch project
Basically what you need to do is to add a collection of 'Bindings' and the 'DataContext' property to your FirstView.
If you do that then you should be able to databind (to DataContext) within FirstView just like you do within any normal MvvmCross view.
Note - this will be much easier to do in v3 as we've added a 'BindingContext' object to assist with exactly this type of operation
I am trying to following this web blog on uploading large files using the Web Api class via Asp.Net Web Forms. If you look through the post you will notice that in order to avoid an out of memory because of buffering of larges files, they recommend overriding the IHostBufferPolicySelector interface. Where do I implement the interface? Do I do it in the Web Api class, in the Global.asax or am I completely off track and need to do the implementation somewhere else?
You don't need to implement this interface, I only listed it as a reference - that code is already part of Web API source (under System.Web.Http/Hosting/IHostBufferPolicySelector.cs)
What you need to do is override the base class System.Web.Http.WebHost.WebHostBufferPolicySelector
This is enough:
public class NoBufferPolicySelector : WebHostBufferPolicySelector
{
public override bool UseBufferedInputStream(object hostContext)
{
var context = hostContext as HttpContextBase;
if (context != null)
{
if (string.Equals(context.Request.RequestContext.RouteData.Values["controller"].ToString(), "uploading", StringComparison.InvariantCultureIgnoreCase))
return false;
}
return true;
}
public override bool UseBufferedOutputStream(HttpResponseMessage response)
{
return base.UseBufferedOutputStream(response);
}
}
and then registering your new class in either Global.asax or WebApiConfig.cs (whichever you prefer):
GlobalConfiguration.Configuration.Services.Replace(typeof(IHostBufferPolicySelector), new NoBufferPolicySelector());
I want to compress the viewstate. Therefore I need to override SavePageStateToPersistenceMedium wich belongs to Web.UI.Page. In "normal" ASP.Net thats quite easy but in my sharepoint-project I cannot find any place where I have a class that is inherited from Web.UI.Page
My PageLayouts have no code behind, neither has the masterPage.
The best solution would be for me to be able to handle that in a pageLayout, because I do not want every Page to cache the ViewState.
To make it a bit clearer. This is the code I want to put "somewhere":
public abstract class BasePage : System.Web.UI.Page
{
private ObjectStateFormatter _formatter =
new ObjectStateFormatter();
protected override void
SavePageStateToPersistenceMedium(object viewState)
{
MemoryStream ms = new MemoryStream();
_formatter.Serialize(ms, viewState);
byte[] viewStateArray = ms.ToArray();
ClientScript.RegisterHiddenField("__COMPRESSEDVIEWSTATE",
Convert.ToBase64String(
CompressViewState.Compress(viewStateArray)));
}
protected override object
LoadPageStateFromPersistenceMedium()
{
string vsString = Request.Form["__COMPRESSEDVIEWSTATE"];
byte[] bytes = Convert.FromBase64String(vsString);
bytes = CompressViewState.Decompress(bytes);
return _formatter.Deserialize(
Convert.ToBase64String(bytes));
}
}
I would inherit from PublishingLayoutPage (which in turns way back inherits from Page) instead and let all of my page-layouts use this base page as codebehind.
This means you need to alter you page-layouts' page directive like so:
<%# Page Language="C#" Inherits="YourNameSpace.BasePage, $SharePoint.Project.AssemblyFullName$" %>
I have a client who want's a single page design for his site where the content for each "page" is shown/hidden using javascript as the user navigates the site.
I'm not sure on the best way to approach this using Orchard. One option would be to have the content all on a single page content item but then you lose the ability to use the navigation features of Orchard and can't let the client think about administration in terms of pages.
Does anyone have ideas or experiences on how best to set this up in Orchard CMS?
Here's the solution I used based on Bertrand's advice:
public ActionResult Display(int id)
{
var contentItem = _contentManager.Get(id, VersionOptions.Published);
dynamic model = _contentManager.BuildDisplay(contentItem);
var ctx = _workContextAccessor.GetContext();
ctx.Layout.Metadata.Alternates.Add("Layout_Null");
return new ShapeResult(this, model);
}
I created a new module with a controller containing the action method above. The action method takes a parameter for the content part id. The _contentManager and _workContextAccessor objects are being injected into the controller. The Layout.Null.cshtml view was created exactly like Bertrand suggested.
Here's what I would do to achieve that sort of very polished experience without sacrificing SEO, client performance and maintainability: still create the site "classically" as a set of pages, blog posts, etc., with their own URLs. It's the home page layout that should then be different and bring the contents of those other pages using Ajax calls.
One method that I've been using to display the same contents as a regular content item, but from an Ajax call (so without the chrome around the content, without bringing the stylesheet in, as it's already there, etc.) is to have a separate controller action that returns the contents in a "null layout":
var ctx = _workContextAccessor.GetContext();
ctx.Layout.Metadata.Alternates.Add("Layout_Null");
return new ShapeResult(this, shape);
Then, I have a Layout.Null.cshtml file in my views that looks like this:
#{
Model.Metadata.Wrappers.Clear();
}
#Display(Model.Content)
Clearing the wrappers removes the rendering from document.cshtml, and the template itself is only rendering one zone, Content. So what gets rendered is just the contents and nothing else. Ideal to inject from an ajax call.
Does this help?
Following along the lines of Bertrand's solution, would it make more sense to implement this as a FilterProvider/IResultFilter? This way we don't have to handle the content retrieval logic. The example that Bertrand provided doesn't seem to work for List content items.
I've got something like this in my module that seems to work:
public class LayoutFilter : FilterProvider, IResultFilter {
private readonly IWorkContextAccessor _wca;
public LayoutFilter(IWorkContextAccessor wca) {
_wca = wca;
}
public void OnResultExecuting(ResultExecutingContext filterContext) {
var workContext = _wca.GetContext();
var routeValues = filterContext.RouteData.Values;
if (filterContext.RequestContext.HttpContext.Request.IsAjaxRequest()) {
workContext.Layout.Metadata.Alternates.Add("Layout_Null");
}
}
public void OnResultExecuted(ResultExecutedContext filterContext) {
}
}
Reusing Rahul's answer with added code to answer #tuanvt's question. I'm honestly not sure what your question is but if seems like you want to access the data sent with the ajax request. If it's JSON you're sending set contentType: "application/json" on the request, JSON.stringify() it , then access it in Rahul's proposed ActionFilter by extracting it from the request stream. Hope it helps in any way.
public class LayoutFilter : FilterProvider, IResultFilter {
private readonly IWorkContextAccessor _wca;
public LayoutFilter(IWorkContextAccessor wca) {
_wca = wca;
}
public void OnResultExecuting(ResultExecutingContext filterContext) {
var workContext = _wca.GetContext();
var routeValues = filterContext.RouteData.Values;
if (filterContext.RequestContext.HttpContext.Request.IsAjaxRequest()) {
workContext.Layout.Metadata.Alternates.Add("Layout_Null");
if (filterContext.HttpContext.Request.ContentType.ToLower().Contains("application/json"))
{
var bytes = new byte[filterContext.HttpContext.Request.InputStream.Length];
filterContext.HttpContext.Request.InputStream.Read(bytes, 0, bytes.Length);
filterContext.HttpContext.Request.InputStream.Position = 0;
var json = Encoding.UTF8.GetString(bytes);
var jsonObject = JObject.Parse(json);
// access jsonObject data from ajax request
}
}
}
public void OnResultExecuted(ResultExecutedContext filterContext) {
}
}