MVC :: Override HtmlHelper.LabelFor?
Jul 1, 2010
I am using VS2010 & MVC2 to develop a web app. I noticed that HtmlHelper.LabelFor doesnt contain an override that accepts either a css class or html attributes. I was thinking about writing my own override for this, but am struggling with it.
The current LabelFor method accepts a lambda expression and automatically extrapolates the property name, display name (if specified via [DisplayName] attribute and value and generates the label. How do I write my overridden to do the same, but also insert any htmlAttributes specified such as class, style etc.
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Similar Messages:
Jan 9, 2010
I would like to extend the HtmlHelper by using metadata (similar to DataAnnotaions metadata). Specifically I want to be able to add a 'Title' attribute to html controls that will then appear as a tooltip on the control. I would like to keep the tooltip text with my model, for example by adding 'Tiltle' metadata to the model as follows:
[DisplayName("User Id")]
[Title("Enter your 10 digit user id")]
property UserId { get; set; }
So the questions are:
1. How do I add metadata (such as 'Title') to my model?
2. How do I access this metadata in my HtmlHelper extension method?
[code]....
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Oct 11, 2010
Does LabelFor look for a template? Is it possible to provide a template for LabelFor?The issue i have is the "for" attribute of label matches a field "id" attribute. In the case of radio or checkbox lists my id's generally take the form of "propertyname_0", "propertyname_1" etc. Simply referencing "propertyname" in the for attribute is not effective.
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Oct 7, 2010
What is the best way to retrieve the display name attribute for an item in your model? I see a lot of people using the LabelFor helper for everything, but a label isn't appropriate if I just want to list the data out. Is there an easy way just get the Name Attribute if I just want to print it out in, say a paragraph?
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Feb 9, 2011
I need to build a custom html helper that generates Label and a tooltip Icon(based on the Display(Name = 'MyProperty', Description = 'ToMyToolTip') attribute). This is how my helper looks like so far:
[Code]....
The problem is that the label have a attribute called "for", I need to set this also but do not find the value in the metadata object? Do I have to manually create the value to the "for" attribute? And if so, how is the best way to do that?
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Feb 26, 2010
I would like to use DataAnnotations in my ASP.NET MVC application. I have strongly typed resources class and would like to define in my view models:
[DisplayName(CTRes.UserName)]
string Username;
CTRes is my resource, automatically generated class. Above definition is not allowed. Are there any other solutions?
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May 20, 2010
Can I integrate Html.CheckBoxFor and Html.LabelFor to create the following:
[Code]....
What type of variable should I pass in the model to hold the choises?
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May 25, 2010
As explained in the bug report the MVC's LabelFor generates incorrect FOR attributes for labels.Just wondering what would be the best way to fix this and if anybody knows about the status of the issues?It seems it has not been looked after and marked as Low priority.
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Feb 19, 2011
I am new to MVC and I am trying to create my own extension method so that I can add onto the html helpers that are available in my razor views. Html.DropDownListFor() lets you create a drop down list for any propery on your model. I would like to create a helper called Html.StateDropDownListFor() that does the exact same thing, except loads the drop down with all 50 US states. This way I don't have to create a SelectList for every single state drop down that I create. What is the easiest way to do this? Right now I have this:
[code]....
Am I even close? I don't want to rebuild a whole text box helper, I just want to create a helper that utilizes the existing text box helper but does the SelectList for me. That way in my views I could just do Html.StateDropDownList(x => x.State)
[code]....
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Sep 20, 2010
How can I call HtmlHelper methods outside of a view? I want to call Html.ActionLink from a C# method. Then use Response.Write to write the output from ActionLink to the output stream of a view. Is there a server side equivalent of HtmlHelper.ActionLink?
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Mar 25, 2010
i have a very big problem: i've created a new test html helper:
[Code]....
i can call it but the first param that i need to pass is htmlHelper and not text as i should do. Why?
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Jan 3, 2010
I am trying to debug a problem where HtmlHelper is null in extension methods. Oddly the debugger claims it's fully populated, however I consistently get null exceptions. I'm trying to figure out where HtmlHelper should being instantiated in an attempt to see where my problem may be.
Where should HtmlHelper be Instantiated?
Update: In particular I am trying to implement the extension found here, [URL] within a masterpage. The error occurs on the MVC template's HomeController.Index(). There are some 'plugins'/virtualpathing that may be causing the problem (trying to avoid this can of worms), but, code the code is essentially the same as found here: [URL]. However, I don't want to trouble anyone with the details of all of that.
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Jul 23, 2010
I am on the way to manpulate existing generice GRID creation, i am stuck as it was using [Code]....
to create action links. I am missing this reference in MVC 2 framework.
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Aug 24, 2010
I am developing a Web app that is based on ASP.NET 3.5, and i added some page from ASP.NET MVC, everything is ok, until i use the "HTML" helper class, then the page is not being able be render, because this is not recognized.
For Example : Html.BeginForm() => this is not recognize as a method
But if i used "System.Web.Mvc.Html.FormExtensions.BeginForm", which is a extension method itself, it work fine.
Environment : ASP.NET MVC 2 and ASP.NET 3.5
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Nov 24, 2010
My View inherits Models.MyModel
<%@ Page Language="C#" MasterPageFile="Something.Master" Inherits="Models.MyModel>" %>
I need a property Model.Something to be available in a HtmlHelper method when I call it from this view.
<%= Html.CustomHelper(...) %>
Is there any way to access this? Maybe via ViewContext or ViewDataDictionary?
I do not want to explicitly pass Model.SessionKey for each helper I call.
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Feb 11, 2011
I am having some trouble with returning a View in response to an ActionResult method being invoked. In my view I have a ViewData which holds a value which is being read. Current process.. user selects 1 of three radio buttons, and clicks a button to apply the selection, which in turn triggers method which sets the form ..
this.form =
this.htmlHelper.BeginForm("GridEditingMode",
"Classification")
Now in my controller, I change the value in the ViewData and simply which to return to the View();. Here is we're the fun starts.. I receive the following message, and cannot get around it. The view 'GridEditingMode' or its master was not found. The following locations were searched:
[Code]....
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Aug 16, 2010
am currently stuck with this problem of displaying an image using HtmlHelper class.Here is what i have.
I have a custom HtmlHelper class which supposed to display an image:
[Code]....
[Code]....
I managed to get to the controller, but image shows as null. Is there a way around it ? or maybe an even better way to do this?
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Mar 2, 2011
i have a class ProductCategoryViewModel
public class ProductCategoryViewModel{
public List<Category> Category { get; set; }
}
List<Category> Category is my database table having two properties Category_Id and Category_Name
and a strongly typed ProductCategoryViewModel View in which a ListBoxFor HtmlHelper is filled with Category_Name and Category_Id
public ActionResult Index(ProductCategoryViewModel model)
{
if (ModelState.IsValid)[code]....
In this Article is also my Database table defined in Linq to Sql classes. I want to get selected value and text from HtmlHelper ListBox to insert it to my Article table
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Mar 9, 2011
I have created a custom html helper as follow:
[Code]....
In my View, I am using it like this:
[Code]....
However, for some reason nothing gets rendered!
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Aug 24, 2010
I'm trying to override all the Html.TextBoxFor etc. methods. I want to make them non-static methods in a class that extends ViewUserControl. But, according to intellisense, Html does have access to these methods; they simply don't appear. So basically I want to do something like:
[Code]....
But I'm not getting the syntax right.
Basically just trying to wrap the TextBoxFor call so that my ViewUserControl can drop in a unique id each time.
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Jul 6, 2010
I saw this implemented somewhere but basically below I'm using the textbox HTMLHelper to draw a textbox with the id myID and default text 'text_goes_here'. I want to also add a class to thiis helper, i saw somewhere it implemented with new {@class =''} as a third parameter creating an object but im not sure exactly how its wrote
<%= Html.TextBox("myID", "text_goes_here") %>
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Nov 26, 2010
I'm trying to create a jquery template using the HtmlHelper.ActionLink. By default it url encodes the parameters, which causes a problem for the syntax needed for the template. Is there a way to override the encoding.
In this example
<script id="itemTemplate" type="text/x-jquery-tmpl">
@Html.ActionLink("Details", "Details", new { id = "${ID}" } ) | ${Last} | ${First} <br />
</script>
the generated code for @Html.ActionLink ends up being
<a href="/User/Details/%24%7BID%7D">Details</a>
What I'd like to end up with is
<a href="/User/Details/${ID}">Details</a>
<script id="itemTemplate"
type="tex
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Jun 29, 2010
When upgrading to mvc2 i noticed some of my javascript that was keying on "Points[0]_Id" (this is invalid for an html id btw) started to fail. I pulled up the source and noticed that the TagBuilder class now generates valid client id's and replaces all invalid characters with the "IdAttributeDotReplacement" (which is a terrible name now, since it's not just a dot replacement character anymore). I started to look for a way to generate client id's using a helper built into mvc and came across HtmlHelper.GenerateIdFromName, but this still generates ids the invalid way!
TagBuilder.GenerateId( "Points[0].Id" ) = "Points_0__Id"
HtmlHelper.GenerateFromName( "Points[0].Id" ) = "Points[0]_Id"
IMO: the tagbuilder class or the GenerateFromName code should not be duplicated in two different spots or else you will get errors like this. Also I consider this change made to TagBuilder.GenerateId to be a breaking change and should be included in the breaking changes section of the release notes.
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Sep 23, 2010
I have an HTML Helper that essentially renders static content read from HTML files (inside of a vdir). There are cases when the HTML file has a title element defined and in such cases, the current page should use the given title. The content inside of the body should be rendered where the Helper class is referenced in the View.
This is how I call the helper.
<%=Html.StaticContent("staticcontent.htm",
new List<StaticContentTag>()
{
new StaticContentTag()
{TagKey=ReplaceTags.MarketName,
TagValue = "Austin"}
}, Model, true) %>
I'm passing in the ViewModel so that I can set the title and the last parameter is a flag that says whether to force the title or not.
The head has the title defined like this.
<title><%=Model.Title%></title>
I know what I'm doing wrong here by referencing the Model.Title element before even calling the helper. Any ideas on how I can work around this?
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Feb 16, 2010
What are the advantages of extending HtmlHelper instead of creating a Custom Class.
f.e. <%= Html.Table(data) %> vs <%= CustomClass.Table(data) %>
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