XHR2 和[FromBody]使用说明

[FromBody]必须是application/json 否则会报415 不支持的类型

//Forms
function  FormsPost(data) { //Default Type x-www-form-urlencoding =>Form
    $.ajax({
        url: "/api/AgentAccount/PostForm",
        type: "post",
        datatype: "json",
        data: data,
        success: function (data) {
            alert('success');
        }
    }).fail(
    function (xhr, textstatus, err) {
        alert('error: ' + err);
    });
}

//[FromBody] Model
function ModelPost(data) {
    $.ajax({
        url: "/api/AgentAccount/UserRegister",
        type: "post",
        contentType: 'application/json; charset=utf-8',
        datatype: "json",
        data: JSON.stringify(data),//jSON.stringfy for Model transmit [FromBody] will be used;
        success: function (data) {
            alert('success');
        }
    }).fail(
    function (xhr,textstatus, err) {
        alert('error: ' + err);
    });
}                

//[FromBody] String
function StringPost(data) {
    data = { "": "sds" };
    $.post('/api/AgentAccount/PostString', data);
    $.ajax({
        url: "/api/AgentAccount/PostString",
        type: "post",
        contentType: 'application/json; charset=utf-8',
        datatype: "json",
        data: data,
        success: function (data) {
            alert('success');
        }
    }).fail(
    function (xhr, textstatus, err) {
        alert('error: ' + err);
    });
}

//[FromBody] Image
function XhrUploadImage() {

}

//[FromeBody] xhr.Model
function XhrPostModel(data) {
    xhr = new XMLHttpRequest();
    xhr.open("POST", "/api/AgentAccount/UserRegister", true);
    xhr.setRequestHeader('Content-Type', 'application/json');
    xhr.send(JSON.stringify(data));
    xhr.onreadystatechange = function (event) {
        if (4 == xhr.readyState) {
            if ((xhr.status >= 200 && xhr.status < 300) || xhr.status == 304) {
                alert(xhr.responseText);
            } else {
                alert('error:' + xhr.status);
            }
        }
    };
}

　对应controller action

        [HttpPost("PostForm")]
        public JsonResult PostForm(string FullName)
        {
            var data = new
            {
                username = "PostString"
            };
            return Json(data);
        }

        [HttpPost("UserRegister")]
        public JsonResult UserRegister([FromBody]AspNetUsers value)
        {
            var data = new {
                username="sf"
            };
            return Json(data);
        }

        // POST api/values
        [HttpPost("PostString")]
        public JsonResult PostString([FromBody] string value)
        {
            var data = new
            {
                username = "sf"
            };
            return Json(data);
        }