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.
View 5 Replies
My test shows it doesn't work. It ignores the nested data in model.
View 1 RepliesI 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.
I have found hints that MVC 2 recognises the 'buddy class' type of property metadata, where data annotation attributes are applied to a 'buddy' metadata class, and the MetadataType on the actual entity class points to that buddy class, as below. However, as below, it seems the only attribute that makes any difference to the rendered UI is DisplayName. Why are the other attributes like DataType, Required, and ReadOnly not working? I.e. why can I enter text in a read only field? Why do I not get an error when a required field is empty? Why does the DataType attribute have no apparent effect? Why does EditorForModel not include validation messages?
[MetadataType(typeof(CustomerMetadata))]
public partial class Customer
{
public class CustomerMetadata
{
[ScaffoldColumn(false)]
public object CustomerId { get; set; }
[DisplayName("CustomerNo.")]
[ReadOnly(true)]
[Required(AllowEmptyStrings = false, ErrorMessage = "Customer No. is required.")]
public object CustomerNo { get; set; }
}
}
I find behaviour the same whether I use an explicit LabelFor and TextBoxFor for each model property, or a single EditorForModel for the whole model.
I watched the intro video atleast 20 times trying to figure out how Phil used EditorForModel instead of the generated Edited fields when using Add View > View content(Edit).
How do you use a class (entity) instead of the generated fields?
My case:I am developing an application that will run for multiple clients, each client has the ability to customize field displays and error messages.My issue:I created some custom attributes which inherit from DisplayNameAttribute, RequiredAttribute etc... and in them I am pulling out the resource needed.However it is only executed the once, so if my context changes it will be pulling the incorrectly cached value instead of pulling the new value need.Has anybody attempted to try something like this with the data annotations? Or any advice such as just don't use them for this scenario?
View 2 RepliesI tried view and model below in MVCMusicStore sample in .NET 3.5 MVC2 .
If submit button is pressed, empty first name field is accepted witohut any error message. How to force validation so that
only valid data is accepted ?[Code]....
[Code]....
In my LogOnViewModel.cs :[Code]....I have this code, and on the view control, i call <%: Html.EditorForModel()%>
Then I have something like this look:
UserName:|||||||||||||||||||||||||||||||||||| <- TextBox
Password:||||||||||||||||||||||||||||||||||| <- TextBox
ㅁ <- Checkbox
||Login|| <- submit button
how do i change the layout of this template? I want to change the text and change the position of the textboxes.I know that I can customize it by calling individual fields and write hard-coding, but I am curious if there is a way to use EditorForModel() in easier.
In my project I use Strong Types Views. Because I find it nice structured.
public abstract class AbstractViewData: View Page ( ICollection Foo; )
public class HTML Component View Data: AbstractViewData ( string Foo2; )
I have the same structure in my code, as in the corresponding pages.And here starts the problems. I would like to use HTML.Display (o => o.Foo) could be a customer for that matter.But my Strong Types Views have not posted Metadata Model into my classes.Like: Return View ( "FooView", customer); would.Is there a way to write some code that can solve this problem for me?
Somebody knows the answer? I'm using L2S with field ntext in my db
View 1 RepliesI'm working on an ASP.NET MVC 2 project with some business entities that have metadata dataannotations attributes applied to them (Validation attributes, Display attributes, etc.).
Something like:
[Code]....
Using the metadata from different views is no problem, as long as I am using my business entities as viewmodels or as part of a viewmodel like this:
[Code]....
However, sometimes I need to code a view for editing some, but not all fields of an entity. For those fields I want to reuse the metadata already specified in my user entity. The other fields should be ignored. I'm talking about custom view models like this:
[Code]....
That's where I am running into problems. The custom view model above leads to an exception when the view is generated, because it has no password property.
The associated metadata type for type 'Zeiterfassung.Models.ViewModels.Users.UserNameViewModel+UserModel' contains the following unknown properties or fields: Password. make sure that the names of these members match the names of the properties on the main type.
Also, even if this exception did not occur, I expect to get into even more trouble with model validation on form submit because Password is marked as required in my business entity.
I can think of several workarounds, but none seem really ideal. In any case I can't change the database layout so that the password field would be in a separate entity in my example above.
How would you handle this scenario?
I would like to separate my attribute decoration(3-4 per field) by having them someplace else so that my code looks readable.Also the arguments passed to some attributes should come from a resource file.EG:[Required("Cannot proceed without entering *field_Name*")]
I need just [Required] Possible duplicate of this question(on which i couldn't resist offering a bounty) : Default resource for data annotations.
I was wondering if anyone can point me in the right direction? I have a POCO model and I am using Code First CTP. In my application, I set the database to be recreated whenever the model changes.
I would like to write custom functionality to access the model (POCO) metadata same way as EF sees it and use that to generate some source files (using T4). I would like to access the processed model not having to worry about finding properties that hold primary keys or any other conventions (implicit or not). What is the way to go about it?
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?
I have a view that is strongly typed and its model is of type LogOnModel. That LogOnModel has anotated properties like this one:
[Required(ErrorMessage = "Please enter your password")]
[DataType(DataType.Password)]
[Display(Name = "Password", Description = "Your secreet password")]
public string Password { get; set; }
All of them has Display anotation with Display.Descripion property set. I want to create HtmlHelper extension method that will output <span> containg the value of Display.Description property. So for example if I called my extension method DescriptionFor than this code:
<%: Html.DescriptionFor(m => m.Password) %>
should produce following html: <span>Your secreet password</span>
ddlFromCurrency.Attributes.Remove("class");
I want to remove class="xx" from html element with Attributes.Remove but not wokrking. Attributes.Add works but Attributes.Remove doesn't.
It seems that Intellisense just doesn't work within attributes in an ASP.NET page. I really like strong typing, because I like Intellisense, and so I generally make sure to bind to a strongly typed object in ASP.NET:
<Repeater ID="rep" runat="server">
<ItemTemplate>
<div id="mydiv" class="<%# TypedObject.Class %>" runat="server">
<%# TypedObject.Name %>
</div>
</ItemTemplate>
</Repeater>
Intellisense just works within the body of the div, but no matter what I do it will not work to set that class attribute. This is very annoying, since attributes are pretty fundamental in HTML, and many of the built in controls use them heavily. I can't find anything about this, but I can't believe this isn't a pretty fundamental need. Is there any way to get this to work?
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
<%: Html.TextBoxFor(model => model.itinerary, new { size = 60})%>
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]....
I am working on an ASP.NET MVC 2 project with VS 2010 and out of nothing I get the following errors on my views:
The name 'Html' does not exist in the current context
The name 'Model' does not exist in the current context
It is like it is not recongnizing the MVC Html and Model classes.
I have System.Web.Mvc on my references and on Web.Config I have:
[Code]....
I have a usercontrol which needs to work slightly differently according to the attributes of its owning page.Is there a way to determine the owning page from within the user control?
View 1 RepliesI think I need to drop in some escape characters, but I'm not quite sure where. Here is the javascript function I'm attempting to call:
function setData(associateValue, reviewDateValue) {
var associate = document.getElementById("Associate");
var reviewDate = document.getElementById("ReviewDate");
associate.value = associateValue;
reviewDate.value = reviewDateValue;
}
Here is the asp .net mvc line where I'm attempting to create a Radio button with a click event that calls the above function and passes data from the model as javascript parameter values.
<%= Html.RadioButton("Selected", item.Selected, new { onClick="setData('<%=item.Associate%>','<%=item.ReviewDate%>' )" } )%>
The above throws a bunch of compile issues and doesn't work. A call such as the following does call the javascript, but doesn't get the data from the model.
<%= Html.RadioButton("Selected", item.Selected, new { onClick="setData('item.Associate','item.ReviewDate' )" } )%>
<%= Html.RadioButton("Selected", item.Selected, new { onClick="setData('item.Associate','item.ReviewDate' )" } )%>
<% String functionCall = String.Format("setData('{0}','{1}')", Html.Encode(item.Associate), Html.Encode(item.ReviewDate )) ; %>
<%= Html.RadioButton("Selected", item.Selected, new { onClick=functionCall } )%>
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?
I wish to use the same form for adding and editing records within a database using a partial view. I understand that this is fine as the standard Html.BeginForm automatically output the correct html depending on the action that is being used (Add / Edit). However, I need to out said form with some extra HTML attributes. There does not appear to be an overload that allows this to happen without also specifying the ACTION and CONTROLLER names. If I hardcode these then surely I cant use the same form for edit and add automatically? Or am I missing something?
View 1 RepliesI need to add some attributes [URL] to the tag in an ASP.NET Page object. Note: I cannot do this in a declarative manner and have to use the server side object model to do it.
To add some additional information:
I need to do this within the ASP.NET Page rendering life cycle.
I need to add the attribute to the root element in the page.
