Question

我有一个MVC控制器，以某种方式将 Null 传递给它

控制器：

[HttpPost]
public ActionResult UpdateAllNodes(IEnumerable<ReportGroup> reportGroups)
{
    // this is custom return..
    return JsonCamel(null);
}

问题： reportGroups null

javascript ajax post

$.post(updateAllNodeUri, JSON.stringify({ reportGroups: homogeneous.data() }));

Chrome开发工具表格数据：

{"reportGroups":[
    {"Id":1,"ReportGroupName":"Standard Reports","ReportGroupNameResID":null,"SortOrder":1,"items":[],"index":0},
    {"Id":2,"ReportGroupName":"Custom Reports","ReportGroupNameResID":null,"SortOrder":2,"items":[],"index":1},
    {"Id":3,"ReportGroupName":"Retail Reports","ReportGroupNameResID":null,"SortOrder":3,"items":[],"index":2},
    {"Id":4,"ReportGroupName":"Admin Reports","ReportGroupNameResID":null,"SortOrder":5,"items":[],"index":3},
    {"Id":5,"ReportGroupName":"QA Reports","ReportGroupNameResID":null,"SortOrder":4,"items":[],"index":4},
    {"ReportGroupName":"Node","index":5}
]}:

所以我将控制器中的reportGroups和JSON作为reportGroups：因此我失去了为什么它为null。

此处还有报告组的 poco 类

public class ReportGroup : BaseEntity
{
    public override int Id { get; set; }
    public string ReportGroupName { get; set; }
    public int? ReportGroupNameResID { get; set; }
    public int SortOrder { get; set; }
}

Kendo数据调用，然后我可以输出到控制台并查看数据

console.log(homogeneous.data());

// ###  Send the Data to the server 

var updateAllNodeUri = "/Report/UpdateAllNodes";

Answer 1

根据您从Chrome开发者工具获得的JSON数据，您实际上是使用此模型发送JSON：

JSON：

{"reportGroups":[
    {"Id":1,"ReportGroupName":"Standard Reports","ReportGroupNameResID":null,"SortOrder":1,"items":[],"index":0},
    {"Id":2,"ReportGroupName":"Custom Reports","ReportGroupNameResID":null,"SortOrder":2,"items":[],"index":1},
    {"Id":3,"ReportGroupName":"Retail Reports","ReportGroupNameResID":null,"SortOrder":3,"items":[],"index":2},
    {"Id":4,"ReportGroupName":"Admin Reports","ReportGroupNameResID":null,"SortOrder":5,"items":[],"index":3},
    {"Id":5,"ReportGroupName":"QA Reports","ReportGroupNameResID":null,"SortOrder":4,"items":[],"index":4},
    {"ReportGroupName":"Node","index":5}
]}:

型号：

public class ReportGroup
{
    public int Id { get; set; }
    public string ReportGroupName { get; set; }
    public object ReportGroupNameResID { get; set; }
    public int SortOrder { get; set; }
    public List<object> items { get; set; }
    public int index { get; set; }
}

public class RootObject
{
    public List<ReportGroup> reportGroups { get; set; }
}

RootObject类是控制器接收的类，它不是预期的参数。

尝试将JSON转换为以下格式：

[
    {"Id":1,"ReportGroupName":"Standard Reports","ReportGroupNameResID":null,"SortOrder":1,"items":[],"index":0},
    {"Id":2,"ReportGroupName":"Custom Reports","ReportGroupNameResID":null,"SortOrder":2,"items":[],"index":1},
    {"Id":3,"ReportGroupName":"Retail Reports","ReportGroupNameResID":null,"SortOrder":3,"items":[],"index":2},
    {"Id":4,"ReportGroupName":"Admin Reports","ReportGroupNameResID":null,"SortOrder":5,"items":[],"index":3},
    {"Id":5,"ReportGroupName":"QA Reports","ReportGroupNameResID":null,"SortOrder":4,"items":[],"index":4},
    {"ReportGroupName":"Node","index":5}
]

使用Javascript：

$.post(updateAllNodeUri, JSON.stringify(homogeneous.data()));

mvc控制器从具有数据的javascript对象传入null

1 个答案: