从的FormCollection数据绑定到模型 [英] Data Binding from FormCollection to Model

问题描述

我试图从绑定我的观点获得一个特定的模型数据。我想表单数据转换成字典对象。这是使用我开发的，TranslateFormData一个通用的方法来实现。这是我遇到的问题。

下面是控制器code：

  [HttpPost]
公共System.Web.Mvc.ActionResult SubmitDecision（的FormCollection FORMDATA）
{
    字典＆LT;字符串，字符串＆GT;数据= FormData.TranslateFormData（FORMDATA）;
    TPDispatcherNetClient客户端=新TPDispatcherNetClient（）;    *额外的code冷落为了简洁*    返回查看（）;
}
 

这行，词典＆LT;字符串，字符串＆GT;数据= FormData.TranslateFormData（FORMDATA）; ，导致我的问题。这里是code为TranslateFormData：

 公共静态字典＆LT;字符串，字符串＆GT; TranslateFormData＆LT; T＆GT; （T型），其中T：IEnumerable的＆LT; KeyValuePair＆LT;字符串，字符串＆GT;＆GT;
{
    字典＆LT;字符串，字符串＆GT;数据=新词典与LT;字符串，字符串＆GT; （）;
    IEnumerator的＆LT; KeyValuePair＆LT;字符串，字符串＆GT;＆GT;成对= form.GetEnumerator（）;    返回的数据;
}
 

在传递的FormCollection正在产生以下错误：

  

类型System.Web.Mvc.FormCollection'不能被用作类型参数在通用类型或方法TranslateFormData（T），T。有一个从System.Web.Mvc.FormCollection'到'System.Collections.Generic.IEnumerable>

隐式>引用转换

我怎样才能做到这一点？我想避免更改TranslateFormData接受一个特定的类型，然后根据所有预期的类型超载，如果在所有可能的。

  

编辑
  由于最初写这个问题我已经相应的修改我的翻译方法：

 公共静态CustomerDecisionRequest TranslateFormData＆LT; T＆GT; （T型），其中T：NameValueCollection中，IEnumerable的
{
    CustomerDecisionRequest要求=新CustomerDecisionRequest（）;
    IEnumerator的枚举= formData.GetEnumerator（）;    返回请求;
}
 

因此​​，虽然上述问题表示，这是否修改实际意义，它是适当的？

解决方案

感谢您所有的意见。我采用的方法是基于无知。我能得到我的看法张贴正确的数据，使用正确的模式，回到我的控制器。此外，我不需要定制/特殊装订。

我的问题，没有正确设置我的模型撒谎。我只是在指定的公共领域，而不是自动的公共属性。一旦我做了改变，其他的一切就明白了。

I am trying to bind data received from my view to a specific model. I want to translate the form data into a dictionary object. This is accomplished using a generic method I developed, TranslateFormData. This is where I am having issues.

Here is the controller code:

[HttpPost]
public System.Web.Mvc.ActionResult SubmitDecision ( FormCollection formData )
{
    Dictionary<string, string> data = FormData.TranslateFormData ( formData );
    TPDispatcherNetClient client = new TPDispatcherNetClient ( );

    *Additional code left out for brevity*        

    return View ( );
}

This line, Dictionary<string, string> data = FormData.TranslateFormData ( formData );, is causing me issues. Here is the code for TranslateFormData:

public static Dictionary<string, string> TranslateFormData<T> ( T form ) where T : IEnumerable<KeyValuePair<string, string>>
{
    Dictionary<string, string> data = new Dictionary<string, string> ( );
    IEnumerator<KeyValuePair<string, string>> pairs = form.GetEnumerator ( );

    return data;
}

Passing in the FormCollection is producing the following error:

The type 'System.Web.Mvc.FormCollection' cannot be used as type parameter 'T' in the generic type or method 'TranslateFormData(T)'. There is no implicit >reference conversion from 'System.Web.Mvc.FormCollection' to 'System.Collections.Generic.IEnumerable>'

How can I accomplish this? I want avoid changing TranslateFormData to accept a specific type and then overloading based on all expected types if at all possible.

EDIT Since initially writing this question I have modified my translation method accordingly:

public static CustomerDecisionRequest TranslateFormData<T> ( T form ) where T : NameValueCollection, IEnumerable
{
    CustomerDecisionRequest request = new CustomerDecisionRequest ( );
    IEnumerator enumerator = formData.GetEnumerator ( );

    return request;
}

So, while the above questions stands, does this modification make sense and is it appropriate?

解决方案

Thank you for all the comments. The approach I was taking was based on ignorance. I was able to get my view to post the correct data, using the correct model, back to my controller. In addition, I need no custom/special binding.

My problem lied in not setting up my model correctly. I was just specifying public fields instead of automatic public properties. Once I made that change, everything else fell into place

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