如果我的值链接到实例变量，应如何将值传递给Controller中的验证操作? [英] How should I pass values through to a validation action in a Controller if my values are linked to variables of an instance?

问题描述

我才刚刚开始使用MVC和jQuery validate，所以请多多包涵.我也不知道我的问题的标题应该是什么. 8(

I have only just started using MVC and jQuery validate so please bear with me. I also have no idea what the title of my question should be. 8(

概述

我正在将MVC 4与jQuery validate一起使用.我的表格正在客户端验证.我有一个场景，其中两个非常相似的对象需要放在我的表单上.这是通过具有两个属性的ModelView实现的. ModelView链接到视图，除远程验证外，其他所有功能均可用.我需要根据对象中的特定值来验证字段.除了控制器中验证动作的参数外，其他所有东西都很好地链接在一起. 在您拒绝我的同意之前，我编造了以下代码方案.

I am using MVC 4 with jQuery validate. My form is being validated on the client side. I have a scenario where two very alike objects need to be on my form. This has been achieved by means of a ModelView which has two properties. The ModelView is linked to the View and everything works excepting the remote validation. I need to validate a field based on a particular value in the object. Everything is linked together nicely excepting the parameters of the validation action in the controller. Before you give me disapproving tsk tsks, I made up the following code scenario.

代码

Model 类，其中Name需要根据GroupID的值进行远程验证.从本质上讲，该名称对于该组是唯一的.

Model class where Name requires remote validation depending on the value of GroupID. Essentially, the name is unique to the group.

public class Colour
{
    [Key]
    public int GroupID {get;set;}

    [Required]
    [Remote("ColourExists", "Validation", AdditionalFields = "GroupID")]
    public string Name {get;set;}
}

操作所在的

验证控制器.

public class ValidationController :Controller {
    public JsonResult ColourExists(string name, string groupID) {
        // Add validation here later
        return Json(false, JsonRequestBehavior.AllowGet);
    }
}

视图和控制器链接到 ModelView ，因此我可以在表单上显示两个单独的实例.通常，我需要向用户询问一组的明暗颜色. (在开始之前，请记住，这不是真实的)

The View and Controller is linked to a ModelView so that I can display two separate instances on my form. Typically I need to ask the user for a Bright and a Dark colour for one group. (Before you tsk, remember, this isn't for real)

 public class ColourViewModel {
     public Models.Colour BrightColour { get; set; }
     public Models.Colour DarkColour {get;set;}
 }

生成的HTML 具有输入字段BrightColour_Name和DarkColour_Name.这些字段具有data-val-remote-additionalfields=*.Name属性.模糊时，它们GET正确的操作和控制器，但参数为空.预期的参数是InstanceName.VariableName，例如BrightColour.Name和DarkColour.Name.请求发送如下Validation/ColourExists?BrightColour.Name=red&BrightColour.GroupID=10

The generated HTML has input fields BrightColour_Name and DarkColour_Name. These fields have data-val-remote-additionalfields=*.Name attributes. On blur they GET the correct action and controller but the parameters are null. The expected parameters are InstanceName.VariableName such as BrightColour.Name and DarkColour.Name. The request is sent as follows Validation/ColourExists?BrightColour.Name=red&BrightColour.GroupID=10

如果我的值链接到实例变量，那么应该如何将这些值传递给验证控制器中的ColourExists操作?

So how should I pass the values through to the ColourExists action in the validation Controller if my values are linked to variables of an instance?

编辑

Edit

视图如下:

@model Colours.ViewModels.ColourViewModel
@using (Html.BeginForm()) {
    @Html.LabelFor(model => model.DarkColour.Name)
    @Html.EditorFor(model => model.DarkColour.Name)
    @Html.HiddenFor(model => model.DarkColour.GroupID)
    <input type="submit" value="Save" />
}

推荐答案

通常，在这种情况下，您将在远程验证操作中使用前缀，如下所示:

Normally, in this situation you would use a prefix in your remote validation action like here:

public JsonResult ColourExists([Bind(Prefix = "BrightColour")] string name) {
    // Add validation here later
    return Json(false, JsonRequestBehavior.AllowGet);
}

但是，您不能这样做，因为您在ViewModel中使用了两个相同的实体(不是ModelView)，并且每个实体都有自己的Prefix.因此，绑定失败.

But, you can't do that in your case, because you are using two same entities in your ViewModel (not ModelView), and each has its own Prefix. So, the binding fails.

因此，您必须创建两个单独的ViewModel:

So, you'll have to create two separate ViewModels:

public class BrightColourViewModel
{
    public int GroupID { get; set; }
    [Required]
    [Remote("BrightColourExists", "Home", AdditionalFields = "GroupID")]
    public string Name { get; set; }
}

public class DarkColourViewModel 
{
    public int GroupID { get; set; }
    [Required]
    [Remote("DarkColourExists", "Home", AdditionalFields = "GroupID")]
    public string Name { get; set; }
}

然后，按如下所示重新定义您的ColourViewModel:

Then, redefine your ColourViewModel like here:

public class ColourViewModel
{
    public BrightColourViewModel BrightColour { get; set; }
    public DarkColourViewModel DarkColour { get; set; }
}

然后，创建两个单独的远程验证操作，如下所示:

And, then create two separate remote validation actions like this:

public JsonResult BrightColourExists(BrightColourViewModel brightColour)
{
    // Call shared code to check if colour exists
    return Json(false, JsonRequestBehavior.AllowGet);
}

public JsonResult DarkColourExists(DarkColourViewModel darkColour)
{
    // Call shared code to check if colour exists
    return Json(false, JsonRequestBehavior.AllowGet);
}

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