POST对象的列表以MVC 5控制器 [英] POST a list of objects to MVC 5 Controller

问题描述

我要发布对象的列表，以一个MVC 5控制器，但只有空达到控制方法。这个帖子：

  $。阿贾克斯（{
    键入：POST，
    数据类型：JSON
    的contentType：应用/ JSON
    网址：../delikte
    数据：JSON.stringify（{delikte：delikte}）
}）;
 

进入该MVC 5控制器：

  [HttpPost]
[路线（@delikte）]
公共无效saveDelikte（列表＆LT; D​​elikt＆GT; delikte）
{
  ... // delikte为null
}
 

我可以从IE浏览器调试工具看到的，POST包含以下数据：

<$p$p><$c$c>{\"delikte\":[{\"VerfahrenId\":\"6\",\"DeliktId\":\"4123\"},{\"VerfahrenId\":\"6\",\"DeliktId\":\"4121\"}]}

和应转换到这个对象的列表：

 公共类Delikt
{
    公众诠释VerfahrenId {搞定;组; }
    公众诠释DeliktId {搞定;组; }
}
 

我想这可能是从VerfahrenId和DeliktId的定义在类Delikt int类型的问题，但改变串并没有改变的问题。

我已阅读其他线程，但我无法找到一个解决办法有（我的职务包括数据类型的contentType，张贴的信息在正确的格式看起来是）。哪里是我的错？

解决方案

我会尝试从POST数据删除属性名称：

  $。阿贾克斯（{
    键入：POST，
    数据类型：JSON
    的contentType：应用/ JSON
    网址：../delikte
    数据：JSON.stringify（delikte）
}）;
 

这也可能有助于明确指定的值来自POST正文：

  [HttpPost]
[路线（@delikte）]
公共无效saveDelikte（[FromBody]列表＆LT; D​​elikt＆GT; delikte）
{
    ... // delikte为null
}
 

I would like to post a list of objects to an MVC 5 Controller but only NULL reaches the Controller method. This POST:

$.ajax({
    type: "POST",
    dataType: "json",
    contentType: "application/json",
    url: "../delikte",
    data: JSON.stringify({ "delikte" : delikte})
});

goes to this MVC 5 Controller:

[HttpPost]
[Route(@"delikte")]
public void saveDelikte(List<Delikt> delikte)
{
  ... // delikte is null 
}

As I can see from IE debug tools, the POST contains the following data:

{"delikte":[{"VerfahrenId":"6","DeliktId":"4123"},{"VerfahrenId":"6","DeliktId":"4121"}]} 

And should be converted to a List of this object:

public class Delikt
{
    public int VerfahrenId { get; set; }
    public int DeliktId { get; set; }
}

I thought it could be a problem from the definition of VerfahrenId and DeliktId as int in the class Delikt, but changing to string did not change the problem.

I have read other threads but I could not find a solution there (my post includes dataType, contentType, the posted information seems in the right format). Where is my mistake?

解决方案

I would try removing the property name from your POST data:

$.ajax({
    type: "POST",
    dataType: "json",
    contentType: "application/json",
    url: "../delikte",
    data: JSON.stringify(delikte)
});

It may also help to explicitly specify that the value comes from the POST body:

[HttpPost]
[Route(@"delikte")]
public void saveDelikte([FromBody]List<Delikt> delikte)
{
    ... // delikte is null 
}

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