AJAX实例

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;
        }

    }
}

后台

        [HttpPost]
        [ValidateAntiForgeryToken]
        public IActionResult SetTrain([FromBody]UTrainDetails model)
        {
            if (model != null)
            {
                string ID = model.Id.ToString();
                string TrunName = model.TrunName;
                string TimeLeng = model.TimeLeng.ToString();
                string Score = model.Score.ToString();

                return Json(new { result = ID + "," + TrunName + "," + TimeLeng + "," + Score });
            }
            else
            {
                return Json(new { result = "Is Null" });
            }
        }