ASP.Net MVC自定义数据类型传递其他值

Question

I have created the custom "DataType" annotation to use on the model object to tell this is the date field on the view. ( [DataType("Date")] ) If I use @Html.EditorFor(model => model.DateCreated) , it will act as a date field and pup up the JavaScript date picker. This is the template I am using under EditorTemplates

@inherits System.Web.Mvc.WebViewPage<DateTime> 
<div class="input-append date" data-date="12-02-2012">
    <input type="text" class="span2">
</div>

View -

<div class="control-group">
        @Html.LabelFor(model => model.DateCreated, new { @class = "control-label" })
        <div class="controls" id="date-container">
            @Html.EditorFor(model => model.DateCreated, new { @class="input-append date"})
            @Html.ValidationMessageFor(model => model.DateCreated, null, new { @class = "help-inline" })
        </div>
    </div>

Model -

[Display(Name = "Date Created")]
[DataType("Date")]        
public DateTime DateCreated { get; set; }

Controller -

public ActionResult Create(int id)
{
      // Attempt to get new customer object
      GetPaymentResponse paymentResponse = _BillingService.GetPayment(id);

     // Check whether response was successful
     if (paymentResponse.State == BaseResponseState.Valid)
     {              
          paymentResponse.Payment.Type.AvailableOptions = paymentResponse.Payment.Type.AvailableOptions.Where(x => x.Value != "BalancingTransaction").ToList();
          ViewData.Model = paymentResponse.Payment;
          return View();
     }           
}

I need to pass some additional value to my view via datatype from the model.

Eg [DataType("Date"), Format("dd/mm/yy"), StartDate("12-02-2012")]

Could you please let me know how can I grab these additional value from the template? (I am new to ASP.Net MVC and I am using MVC 3)

Thanks

Answer 1

If you use the Model Binding it should take the value properly I believe.

In your view, set the model on the first line, line this:

@model MyViewModel

and then in your controller, instead of passing the Model through the ViewData , do something like this:

var model = new MyViewModel();
// do stuff with your model here

return View(model);

Answer 2

Assuming that StartDate is a property of Payment

<div class="control-group">
        @Html.LabelFor(model => model.StartDate, new { @class = "control-label" })
        <div class="controls" id="date-container">
            @Html.EditorFor(model => model.StartDate, new { @class="input-append date"})
            @Html.ValidationMessageFor(model => model.StartDate, null, new { @class = "help-inline" })
        </div>
    </div>

Answer 3

If you specify extra information using attributes, the information must be constant for all the instances of the class in which you define the member. Ie the StartDate will be the same for all instances of your model, becasue the start date specified in the attribute must be a constant.

If that serves your purpoes, you can use a custom metadata provider to get specific metadata in your model from your custom attributes.

If you need to pass different data fro each case, you have to use any of the overloads of EditorFor which allows to pass extra view data. Then you can read that extra information from the ViewData in your template.

Be warned that there are some caveats in the metadata providers and custom template implementations, and registration. Take into account if your type can be made nullable, like DateTime?