实例一：

function btnPSetUnityDB(UId, UTrunName, UTimeLeng, UScore) {
    var xixn = JSON.stringify({
        Id: UId,
        TrunName: UTrunName,
        TimeLeng: UTimeLeng,
        Score: UScore
    });
    var xhr = new XMLHttpRequest;//创建一个 XMLHttpRequest 对象，XMLHttpRequest是实现ajax的基础
    xhr.open("POST", "/Home/SetTrain", true)//请求方式为"Post","/Home/Index"为服务器地址（在MVC这里就是控制器地址+方法名），true表示选择异步
    xhr.setRequestHeader("Content-type", "application/json")//设置请求参数类型
    xhr.send(xixn);

    xhr.onreadystatechange = function () {
        if (xhr.readyState == 4 && xhr.status == 200) {
            var s = xhr.responseText;
            document.getElementById("xinxi").innerHTML = JSON.parse(s).result;
        }

    }
}
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后台

1         [HttpPost]
 2         [ValidateAntiForgeryToken]
 3         public IActionResult SetTrain([FromBody]UTrainDetails model)
 4         {
 5             if (model != null)
 6             {
 7                 string ID = model.Id.ToString();
 8                 string TrunName = model.TrunName;
 9                 string TimeLeng = model.TimeLeng.ToString();
10                 string Score = model.Score.ToString();
11 
12                 return Json(new { result = ID + "," + TrunName + "," + TimeLeng + "," + Score });
13             }
14             else
15             {
16                 return Json(new { result = "Is Null" });
17             }
18         }
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作者：꧁执笔小白꧂