1

我在使用 ASP.Net 时遇到了问题，导致我的头发掉光了。我可以使用不同的方法来绑定模型的某些部分，但没有一种方法可以绑定所有数据。

控制器动作签名

// Post: Profile/{customerId}/SetKnockOutQuestions/{profileId}
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult SetKnockOutQuestions(Int32 customerId,
    Int32 profileId,
    Int32 parentProfileId,
    IEnumerable<ProfileKnockOutQuestionModel> questions)
{

ProfileKnockOutQuestionModel 类的相关数据成员

public sealed class ProfileKnockOutQuestionModel {

    /// <summary>
    /// Parameterless constructor is required for auto-passing GET/POST data to controller actions.
    /// </summary>
    public ProfileKnockOutQuestionModel() { }


    [Required]
    [DisplayName("Lead Type Id")]
    public Int32 AdminLeadType { get; set; }

    //[Required]
    //[DisplayName("Question Type")]
    [UIHint("GridForeignKey")]
    public Int16 QuestionTypeId { get; set; }

    [Required]
    [DisplayName("Question Text")]
    public String QuestionText { get; set; }

    [Required]
    [DisplayName("Pass Answer")]
    public String Answer1Text { get; set; }

    [Required]
    [DisplayName("Fail Answer")]
    public String Answer2Text { get; set; }

    [Required]
    [DisplayName("Price")]
    [DataType(DataType.Currency)]
    [Range(0, Int16.MaxValue)]
    public Decimal Price { get; set; }

    public Int32 ProfileKnockOutQuestionId { get; private set; }

    public Int32 ProfileId { get; private set; }

    public Int32 ParentProfileId { get; private set; }

    public Int32 CustomerId { get; private set; }

    public Int32 AdminKnockOutQuestionId { get; private set; }

尝试以 JSON 编码的 javascript 代码发送数据

$.ajax({
    url: "/mvc/Profiles/78219/SetKnockOutQuestions/1605111",
    data: JSON.stringify({ questions: data,
        parentProfileId : 1605105 
    }),
    type: "POST",
    contentType: "application/json; charset=utf-8"
});

发送此数据（为简洁起见）

{
"questions":[
   {
     "AdminKnockOutQuestionId":8,
     "AdminLeadType":4,
     "Answer1Text":"Ya really!",
     "Answer2Text":"no wai",
     "CustomerId":78219,
     "ParentProfileId":1605105,
     "Price":2,
     "ProfileId":1605111,
     "ProfileKnockOutQuestionId":0,
     "QuestionText":"Really? Auto",
     "QuestionTypeId":0
   },

但是一旦我们开始行动，模型绑定器只绑定了字符串、价格和 AdminLeadType。其余数据全为零。在注意到所有正确解析的字段都具有它们并且没有任何改变之后，我尝试将[Required]and属性添加到其余的数字字段。[DisplayName("")]

我尝试发送的另一种方式是作为常规形式的编码帖子。

AXAJ javscript

$.ajax({
    url: "/mvc/Profiles/78219/SetKnockOutQuestions/1605111",
    data: { questions: data,
        parentProfileId : 1605105 
    },
    type: "POST",
});

这会导致如下的帖子正文（从 Chrome 的网络检查器复制/粘贴；我可以发布未解析的 url 编码版本，但请相信我，与号等都是按顺序排列的）：

questions[0][AdminKnockOutQuestionId] = 8
questions[0][AdminLeadType] = 4
questions[0][Answer1Text] = Ya really!
questions[0][Answer2Text] = no wai
questions[0][CustomerId] = 78219
questions[0][ParentProfileId] = 1605105
questions[0][Price] = 2
questions[0][ProfileId] = 1605111
questions[0][ProfileKnockOutQuestionId] = 0
questions[0][QuestionText] = Really? Auto
questions[0][QuestionTypeId] = 0

这有相反的问题。根本没有任何约束，因为模型状态吓坏了，说所有字符串值都丢失了，即使我可以在 Request 对象的 VS 调试器视图中清楚地看到它们。

我的模型绑定到底做错了什么？

4

2 回答 2

1

您的属性有私人二传手。您不可能期望模型绑定器能够绑定它们。所以添加公共设置器：

public sealed class ProfileKnockOutQuestionModel 
{
    /// <summary>
    /// Parameterless constructor is required for auto-passing GET/POST data to controller actions.
    /// </summary>
    public ProfileKnockOutQuestionModel() { }

    [Required]
    [DisplayName("Lead Type Id")]
    public Int32 AdminLeadType { get; set; }

    //[Required]
    //[DisplayName("Question Type")]
    [UIHint("GridForeignKey")]
    public Int16 QuestionTypeId { get; set; }

    [Required]
    [DisplayName("Question Text")]
    public String QuestionText { get; set; }

    [Required]
    [DisplayName("Pass Answer")]
    public String Answer1Text { get; set; }

    [Required]
    [DisplayName("Fail Answer")]
    public String Answer2Text { get; set; }

    [Required]
    [DisplayName("Price")]
    [DataType(DataType.Currency)]
    [Range(0, Int16.MaxValue)]
    public Decimal Price { get; set; }

    /// <summary>
    /// Public setters are required for passing GET/POST data to controller actions.
    /// </summary>
    public Int32 ProfileKnockOutQuestionId { get; set; }

    /// <summary>
    /// Public setters are required for passing GET/POST data to controller actions.
    /// </summary>
    public Int32 ProfileId { get; set; }

    /// <summary>
    /// Public setters are required for passing GET/POST data to controller actions.
    /// </summary>
    public Int32 ParentProfileId { get; set; }

    /// <summary>
    /// Public setters are required for passing GET/POST data to controller actions.
    /// </summary>
    public Int32 CustomerId { get; set; }

    /// <summary>
    /// Public setters are required for passing GET/POST data to controller actions.
    /// </summary>
    public Int32 AdminKnockOutQuestionId { get; set; }

    ...
}

一旦您想要绑定的所有属性都具有公共设置器，您的 AJAX 请求就可以了：

$.ajax({
    url: "/mvc/Profiles/78219/SetKnockOutQuestions/1605111",
    data: JSON.stringify({ 
        questions: data,
        parentProfileId : 1605105 
    }),
    type: "POST",
    contentType: "application/json; charset=utf-8"
});
于 2013-02-01T06:53:05.933 回答
0

我认为我从未发布过数组，但我不知道它为什么不起作用。

我想提几件可能有帮助的事情：

首先，在您的第二次尝试中，我相信您必须使用 ajax 的传统参数，以便 asp mvc 接受它。

其次，我认为您不需要使用 JSON.stringify 来发布 JSON，因此您可能想尝试删除它。

最后，如果所有其他方法都失败了，请制作一个像这样的新模型

public class ProfileQuestions
{
    public Int32 customerId {get;set;}
    public Int32 profileId {get;set;}
    public Int32 parentProfileId {get;set;}
    public IEnumerable<ProfileKnockOutQuestionModel> questions {get;set;}
}

并将您的操作更改为

public ActionResult SetKnockOutQuestions(
    ProfileQuestions profileQs)
{

我知道最后一个选项肯定会起作用

于 2013-02-01T06:44:24.460 回答