MVC :: Html.RenderPartial Appears To Be Stripping Model Of Custom Attributes
Aug 27, 2010
I have implemented a custom ModelMetadataProvider so that I can decorate my view models with some custom attributes and everything was working fine until I made use of a Partial View. The following code in my view works fine: -
<%: Html.DisplayFor(x => x.Results) %>
Results is a List which renders a custom display template and is also decorated with a custom attribute. Using breakpoints, after the above line and prior to the code within the custom display template, the overridden CreateMetadata method in my custom ModelMetadataProvider is invoked. If I look at the attributes collection parameter I can see that it does contain my custom attribute thus everything working as expected. However, if I replace the above with the following line of code in my view then it breaks: -
<% Html.RenderPartial("ApplicationSearchResults", Model.Results, new ViewDataDictionary()); %>
All the Partial View contains is: -
<%: Html.DisplayFor(x => x) %>
Again using breakpoints, after the above line and prior to the code within the custom display template, the overridden CreateMetadata method in my custom ModelMetadataProvider is invoked. But this time if I look at the attributes collection parameter my custom attribute is not there.
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Apr 5, 2010
i am working an asp.net mvc 2 web app using model metadata and some of the model metadata don't seem to work when using the default Html.EditorForModel().For example, when applying the DefaultValue(1) and the ReadOnly(true) attributes on a model field, the field displayed on edit view has zero for its default value and it is not read only.
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Jan 5, 2011
public class CustCtl : WebControl
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protected override System.Web.UI.HtmlTextWriterTag TagKey
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Mar 10, 2010
In my application, there's a module that displays a user's assignments. Sometimes these assignment descriptions are pretty long that's why I display up to 500 characters of the description. However, because I use an HTML editor in the app, if I blindly grab the first 500 characters, there's a good chance the description will look very funky due to missing HTML tags. So, I first need to strip off all the HTML tags, then grab the first 500 characters. Before I re-invent the wheel, I wanted to see if someone else has already tackled this issue and would be kind enough to share his/her code with me.
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Sep 27, 2010
Whats the difference between Html.Partial and Html.RenderPartial?
[Code]....
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Mar 29, 2010
There are lots of questions on how to strip html tags, but not many on functions/methods to close them.
Here's the situation. I have a 500 character Message summary ( which includes html tags ), but I only want the first 100 characters. Problem is if I truncate the message, it could be in the middle of an html tag... which messes up stuff.
Assuming the html is something like this:
<div class="bd">"Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. <br/>
<br/>Some Dates: April 30 - May 2, 2010 <br/>
<p>Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. <em>Duis aute irure dolor in reprehenderit</em> in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. <br/>
</p>
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How would I take the first ~100 characters or so? ( Although, ideally that would be the first approximately 100 characters of "CONTENT" ( in between the html tags )
I'm assuming the best way to do this would be a recursive algorithm that keeps track of the html tags and appends any tags that would be truncated, but that may not be the best approach.
My first thoughts are using recursion to count nested tags, and when we reach 100 characters, look for the next "<" and then use recursion to write the closing html tags needed from there.
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NOTE: ignore that the html isn't totally semantic. This is what I have to deal with from my WYSIWYG.
EDIT:
I added a potential solution ( that seems to work ) I figure others will run into this problem as well. I'm not sure it's the best... and it's probably not totally robust ( in fact, I know it isn't ),
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Jan 6, 2011
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Apr 29, 2010
I have an action that generates active vacancies. The code is below;
[Code]....
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I then added this line to the required page;
[Code]....
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Nov 23, 2010
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Sep 9, 2010
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Sep 17, 2010
What I'm trying to do is use one master page with two different layouts. Currently we have a "master" master page that has all the common elements and two master pages that use it for the two different layouts. This gives us 3 master pages and there's developer confustion and it is a bit of a hassle to keep them consistent. What I'd like to do instead is say "if there's anything in the MainContent ContentPlaceHolder, show the single column layout, otherwise show the two column layout".
From what I've read you're supposed to be able to do this by using something like the following:
[Code]....
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[Code]....
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[Code]....
Then this.MainContent.Controls.Count returns zero.
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Jul 9, 2010
Ive tried [OutputCache] for a view that is rendered from Html.RenderPartial, but it doesn't work! It works perfectly for 'normal' views.
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Jan 6, 2010
I have a question for use Html.RenderPartial.
How do I assign records entered from a user control by Html.RenderPartial the model of objects of my main view?
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Basically the operation of the screen is the following, make the creation of a parent record and then join the other records. I want to save the parent record and associated records.
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Jun 8, 2010
The following link describes the relationships between a Partial View and its parent in terms of ViewData: [URL] In relation to the text: "A partial view enables you to define a view that will be rendered inside a parent view. Partial views are implemented as ASP.NET user controls (.ascx).
When a partial view is instantiated, it gets its own copy of the ViewDataDictionary object that is available to the parent view. The partial view therefore has access to the data of the parent view. However, if the partial view updates the data, those updates affect only the partial view's ViewData object. The parent view's data is not changed"
how the parent view can make use of the new data added or existing data changed and updated, by the partial views? My question is around how to load partial views dynamically at runtime using Html.RenderPartial(...) whilst having one version of the data used and updated by the parent view and it's children.
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Jul 26, 2010
I am unable to get value in controller with below code.
<tr style="border-style: none">
<td>
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dictionary.Add("Films","test");%>
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Jun 7, 2010
I have created a custom control and I intended to assign some attributes which is not necessary to implament.
I also assign default value for them but I am getting System.NullReferenceException error.
Here is my CC's attibute code;
public class ApplicationModule2010 : CompositeControl
{
[DefaultValue(true)]
public bool AppFormOnLine { get { return (bool)ViewState["AppFormOnLine"]; } set { ViewState["AppFormOnLine"] = value; } }
...
also ı have written the below code for another attribute but its default value doesn't work as well;
[DefaultValue("Application is Offline ! Define an offline Text insted of this text !<br/><br/>TugberkUgurlu.Com")]
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What am I missing here ?
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Mar 20, 2010
I am using a model but as I want to have clean views I use the viewmodel approach which is like a downsized model which I map in my controller actions before sending to the view or getting it back in a HttpPost attributed action.
My question is: where to put the data annotation attributes. On the viewmodel classes or on the model? If I get it clearly the viewmodel annotations are used for the client side generation of validation right?
Do does that mean I have to put data annotations everywhere on both model and viewmodel?
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Sep 1, 2010
Is it possible, inside a Custom Model Binder, to fire "something" that "says" the value is invalid so it gets handled by validation part?
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Jul 22, 2010
Bit of newbie when it comes to .NET but getting there. Managed to create a custom verb that appears in all of my WebPartZone
[Code]....
What I would like to be able to do is just have this custom verb added to just the divNews, my current code though crude does work, I just need to figure out how to control what is appears on. Would prefer not to have to create seperate zones.
[Code]....
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Feb 24, 2011
I've placed Html.ValidationSummary(true) on my page so that an error can be displayed that are not associated with a field.
This renders the following html <div class="validation-summary-errors"><ul><li style="display: none;"></li> when there are some ModelState errors are present, all of which are associated with a field. ie there are no page level errors
I've put some background and border styles on the div which give the look that I want.
The problem is that the div is visible even though the collection is empty.
I understand why this is happening but was wonder if there where any techniches to prevent the html from being rendered or to hide the div using styles if the ModelState errors collection is empty?
If its possible I'd like to avoid using jquery to hide the validation summary as the site should work without javascript.
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Jul 23, 2010
I am not sure what I am doing wrong in how I set up validation on my models and viewmodels. For some reason on several of my views that contain a validation summary, it appears empty on initial load of the page. On some other pages it appears correctly when the form's data is posted and it does not appear on initial load, this is the way that I would expect it to work.
On the views where this is occuring, my viewmodels are somewhat more complex in that they contain another complex type that I am passing around that has it's own set of DataAnnotation Validation properties, but I have called the validation summary like this; Html.ValidationSummary(true) so that those properties are not validated.
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Mar 23, 2010
What I'm trying to do is rather basic, but I might have my facts mixed up. I have a details page that has a custom class as it's Model. The custom class uses 2 custom objects with yet another custom object a property of one of the 2. The details page outputs a fair amount of information, but allows the user to post a comment. When the user clicks the post button, the page gets posted to a Details action that looks something like this:
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Details(VideoDetailModel vidAndComment) { ....}
[Code]....
The only fields on the form that is posted are CommentText and VideoId. Here is what the VideoDetailModel looks like.
public class VideoDetailModel
{
public VideoDetailModel()
{
[Code]....
I suppose if I added more form fields for the properties I need, they would get posted, but I only need 1 form entry field for the CommentText. If I could get the same Model objects value that were sent to the page to post with the page, it looks like the solution is rather simple. I think using the RenderPartial in the middle of a form is problematic somehow to how the form gets written in html. I can't really put my finger on why things went bonkers, but if I do my RenderPartials before my form and then begin my form with the text entry field and the hidden VideoId, the default ModelBinder works just fine. I was beginning the form, writing the hidden VideoId, rendering several partial views, create my CommentText field, and then closed the form out. The CommentText field would get bound just fine. The hidden VideoId would not. Maybe I missed a rule somewhere about using RenderPartial.
For completeness, the partial view I was rendering took a Comment object and just wrote out it's CommentText data. Several of these objects would exist for a single Video object. All of this data was in a custom type and passed into the View (the main view) as it's Model. This partial view did not have a form and did not have any data entry fields.
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Dec 21, 2010
I have a create view that I cannot set HTML attributes on. I have tried various ways but still cant set an attribute. Currently I'm trying this
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