I'm using this code on an email field:
[Required]
[DataType(DataType.EmailAddress)]
[Display(Name = "Email address")]
public string Email { get; set; }
[DataType(DataType.EmailAddress)] does not work (validation does not occur no at a server not on the client side).
I am not sure if I should implement myself a Custom Attribute or I can use one included with MVC 3.
Could you please suggest me a solution for creating a custom attribute in case I need to.
I read also about some additional extensions, example
http://nuget.org/packages/DataAnnotationsExtensions.MVC3
Would you suggest it to me?
You could use the usual DataAnnotations library by just using [EmailAddress]
using System.ComponentModel.DataAnnotations;
[Required]
[EmailAddress]
public String Email { get; set; }
Also just for reference, here's the regular expression version of this validation:
[RegularExpression(#"^[A-Za-z0-9](([_\.\-]?[a-zA-Z0-9]+)*)#([A-Za-z0-9]+)(([\.\-]?[a-zA-Z0-9]+)*)\.([A-Za-z]{2,})$", ErrorMessage = "Email is not valid")]
public String Email {get; set;}
Best of luck!
At the moment I have solved my problem using
DataAnnotationsExtensions
it just works, you add their library with NuGet
using DataAnnotationsExtensions;
[Required]
[DataType(DataType.EmailAddress)]
[Email]
public string Email { get; set; }
It looks like all the answers focus on the Data Model while this issue can be affected by the View itself.
The following on MVC .NET 4.5 is working alright:
Data model:
[Required]
[DataType(DataType.EmailAddress)]
[DisplayName("Email")]
public string Email { get; set; }
Razor View:
#Html.LabelFor(model => model.Email)
#Html.EditorFor(model => model.Email)
Note: do not need to add [EmailAddress] attribute. If you use [DataType(DataType.EmailAddress)] along with #Html.EditorFor() in your View, you should be fine.
As highlighted with rich.okelly, at the end you want your input rendered as <input type="email" />.
May be this will be helpful for someone. Following works for me
[Required(ErrorMessage = "*")]
[DataType(DataType.EmailAddress)]
[EmailAddress]
public string Email { get; set; }
But does not work following
[Required(ErrorMessage = "*")]
[DataType(DataType.EmailAddress)]
public string Email { get; set; }
I am using MVC 5 & .NET 4.5
As Felix mentioned, the problem is on the View level, you need to use EditorFor() in your View instead of TextBoxFor(), the EditorFor() will render:
<input type="email" />
which will trigger the validation, while TextBoxFor() will render:
<input type="text" />
So in order to validate your entered email address, you need (in combination with EditorFor()) to use only:
[DataType(DataType.EmailAddress)]
public string Email { get; set; }
This way, your entered value for email will be always validated, but if you don't enter a value for email, nothing will happen (unless you specified the [Required] attribute), the form will be submitted with an empty email address.
[DataType(DataType.EmailAddress)] can't recognize # and [EmailAddress] can't recognize .com , so use RegularExpression :
[RegularExpression(#"^[A-Za-z0-9](([_\.\-]?[a-zA-Z0-9]+)*)#([A-Za-z0-9]+)(([\.\-]?[a-zA-Z0-9]+)*)\.([A-Za-z]{2,})$", ErrorMessage = "Email is not valid")]
Related
Does asp.net mvc client side validation using jQuery only work with views
which use HTML Helpers to generate HTML controls? Does it work with standard HTML Controls?
It is possible to use validation without turning to HtmlHelpers. See this article for details about how MVC works in the background with unobtrusive validation.
http://www.blinkingcaret.com/2016/03/23/manually-use-mvc-client-side-validation/
Though I think unless you have a very specific requirement, rather stick with Helpers, it will make your life easier.
1)Add Validation Property in model
2)In view add html control for show the validation
1)For Model
[Required(ErrorMessage = "Name is Required")]
public string Name { get; set; }
[Required(ErrorMessage = "Email is Required")]
[EmailAddress(ErrorMessage = "Invalid Email Address")]
public string Email { get; set; }
2)In View
#Html.TextBoxFor(m => m.Email)
#Html.ValidationMessageFor(m => m.Email, "", new { #class = "error" })
3)Most Important (Add the following link in the View Page)
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-
validate/1.19.0/jquery.validate.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validation-
unobtrusive/3.2.11/jquery.validate.unobtrusive.min.js"></script>
Okay I have searched it long enough to not find this anywhere on the net. So here is my question, in asp.net MVC (5.1) razor the default helper we can use DisplayNameFor to get the Name value from Display attribute is there anything similar for retrieving Description?
[Display(Name = "First Name", Description="What is your first name")]
public string FirstName { get; set; }
E.g.
#Html.DisplayNameFor(model=>model.FirstName)
Instead use LabelFor and try below code.
#Html.LabelFor(m => m.FirstName,
new{title=ModelMetadata.FromLambdaExpression<Models.Profile, string>
(m => m.FirstName, ViewData).Description})
DataType ErrorMessage doesn't work.
MVC4 DataType ErrorMessage doesn't seem to work.
I have this dataannotation Attribute:
[DataType(DataType.DateTime, ErrorMessage = "Invalid date")]
public override DateTime? BirthDate { get; set; }
but client validation return this error:
The field BirthDate must be a date.
this is the Html portion:
<input Value="" class="date" data-val="true" data-val-date="The field BirthDate must be a date." data-val-required="El campo Fecha nacimiento es obligatorio" id="Patient_BirthDate" name="Patient.BirthDate" type="text" value="" />
Any idea?
On MVC 4 I was able to change the error message in the View with Html.ValidationMessageFor.
See an example:#Html.ValidationMessageFor(model => model.FechaDesde, "Fecha Inválida")
Short Answer: Purpose of DataType.DateTime is NOT to validate your DateTime entry for Birthday property. This is the reason. What it does is just formats the DateTime before displaying it on your view.
What you need is to have [Required] attribute on top of that as well.
However, what i usually prefer to use is Jquery Datepicker and it doesn't even allow user to enter any text, but a valid date.
Edit: When you decorate a model property with [DataType(DataType.Date)] the default template in ASP.NET MVC 4 generates an input field of type="date". Browsers that support HTML5 such Google Chrome render this input field with a date picker.
You may enforce this with code:
[DataType(DataType.Date)]
[DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
public DateTime? BirthDate { get; set; }
In order to correctly display the date, the value must be formatted as 2012-09-28
I am doing int like this:
Hello <%= Html.LabelFor(user => user.UserName)%>
But iam getting not a value which is in Property but something strange like this:
Hello User Name,
How can do it to give some value in label out?
Add DataAnnotations to your model/viewmodel:
public class Customer
{
[Display(Name = "Email Address", Description = "An email address is needed to provide notifications about the order.")]
public string EmailAddress { get; set; }
[Display(ResourceType=typeof(DisplayResources), Name="LName", Description="LNameDescription")]
public string LastName { get; set; }
}
Source: http://msdn.microsoft.com/en-us/library/system.componentmodel.dataannotations.displayattribute(v=VS.95).aspx
If you don't provide a display name by the DisplayAttribute then Html.EditorFor(...) uses the properties name, spliting it on upper case letters:
PropertyName --> Label text
Email --> Email
EmailAdress --> Email Address
The reason for this is because Html.LabelFor will do just that - create a label for the property. In this case, it is producing a label of 'User Name' since the property name is UserName.
You just need to look at the model (or whatever your passing to the view) to return the property value: Html.Encode(Model.UserName)
Update (since this was nearly 3 years ago but people have recently upvoted):
You can just use <%: Model.UserName %> to get the HTML encoded value (<%= writes it as raw and <%: writes it encoded).
If you're using a Razor view engine, then #Model.Username will write it out already encoded.
Take the example classes below. I want to display the customer and two addresses (from a LIST) on a form. Does the model binder in MVC beta support this or will I have to write my own custom binder?
public class Customer
{
public string FirstName { get; set; }
public string LastName { get; set; }
public List<Address> Addresses { get; set; }
public Customer()
{
Addresses = new List<Address>();
}
}
public class Address
{
public int Line1 { get; set; }
public int Line2 { get; set; }
public int City { get; set; }
public int State { get; set; }
public int Zip { get; set; }
}
How would you code the fields? Like this?
<!-- some HTML formatting -->
<%= Html.TextBox("customer.address.line1", ViewData.Customer.Address[0].Line1)%>
<!-- some more HTML formatting -->
<%= Html.TextBox("customer.address.line1", ViewData.Customer.Address[1].Line1)%>
<!-- end of HTML form formatting -->
I've never tried it, but see this post, it's about model binding to a list, maybe it can help you.
Use MvcContrib's NameValueDeserializer to make it simpler. Let's assume that your page derives from ViewPage<Customer>. You can do this:
<%= Html.TextBox("Address[0].Line1", ViewData.Model.Address[0].Line1)%>
<%= Html.TextBox("Address[1].Line1", ViewData.Model.Address[1].Line1)%>
And this:
public ActionResult Save([Deserialize]Customer customer)
And the customer will be deserialized from the form post with the address collection populated. Your indexes do not have to be in sequence -- this supports cases where you want to remove rows on the client side before the post occurs.
In the case that you are deserializing something from the view data dictionary (instead of the Model), then the syntax is like [Deserialize("customer")], where "customer" is the prefix.
You might find this blog post interesting and relevant.
Just to make this complete. It's important that you use the hidden fields with the name Index. So my code above becomes this:
<!-- some HTML formatting -->
<%= Html.Hidden("customer.address.Index", 0) %>
<%= Html.TextBox("customer.address[0].line1", ViewData.Customer.Address[0].Line1)%>
<!-- some more HTML formatting -->
<%= Html.Hidden("customer.address.Index", 1) %>
<%= Html.TextBox("customer.address[1].line1", ViewData.Customer.Address[1].Line1)%>
<!-- end of HTML form formatting -->
It works like a charm!
You can pass an object list with ViewData like that, but you need to change some of the lines. Read more here:
http://weblogs.asp.net/scottgu/archive/2007/12/06/asp-net-mvc-framework-part-3-passing-viewdata-from-controllers-to-views.aspx
and here:
ASP.NET MVC: How do I pass a list (from a class in Model) to a repeater in a View?
Hope this helps
Edit
If you use a model, you need to set up the DataContext first and select the list, but sure you can use the classes generated if you use LINQ.
I defined a similar object. I followed the post on binding to a list as referenced above, While the binding works,I was unable to use the Bind whitelist or blacklist in the controller's action parameter. THe model is an IList