ASP.NET Core 2，jQuery POST数据为空 [英] ASP.NET Core 2, jQuery POST data null

问题描述

我使用jQuery并使用POST方法发送数据.但是在服务器方法中，值不会出现.可能是什么错误?

I use jQuery and send data with the POST method. But in the server method the values are not coming. What could be the error?

客户

$.ajax({
    type: "POST",
    contentType: "application/json; charset=utf-8",
    url: "./AddTag",
    dataType: "json",
    data: "{'parentId':42,'tagName':'isTagName'}",
    success: function (response) {
        // ...
    }
});

服务器

[HttpPost]
public JObject AddTag(int parentId, string tagName)
{
    dynamic answer = new JObject();
    List<LogRecord> logs = new List<LogRecord>();
    answer.added = fStorage.Tags.AddTag(parentId, tagName, logs);
    return answer;
}

固定 非常感谢大家.我明白我的错误.我为此修复了客户端和服务器代码:

fixed Thank you all very much. I understood my mistake. I fixed the client and server code for this:

let tag = {
        "Id": 0,
        "ParentId": 42,
        "Name": isTagName
    };
$.ajax({
    type: "POST",
    contentType: "application/json; charset=utf-8",
    url: "./AddTag",
    dataType: "json",
    data: JSON.stringify(tag),
    success: function (response) {
        // ...
    }
});

服务器

    [HttpPost]
    public JObject AddTag([FromBody] Tag tag)
    {
        dynamic answer = new JObject();
        List<LogRecord> logs = new List<LogRecord>();

        answer.added = fStorage.Tags.AddTag(tag.ParentId, tag.Name, logs);
        answer.logs = Json(logs);

        return answer;
    }

该课程已添加

public class Tag
{
    public int Id { get; set; }
    public int ParentId { get; set; }
    public string Name { get; set; }
    public List<Tag> ChildsList { get; set; }
    [NonSerialized]
    public Tag ParrentTag; 
}

推荐答案

尝试将您的参数提取到单独的DTO类中，并像这样:

Try extracting your params into a separate DTO class and do it like that:

public class ParentDTO 
{
 public int parentId{get; set;}
 public string tagName{ get; set;}
}

[HttpPost]
public JObject AddTag([FromBody] ParentDTO parent)
{

}

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