原文:net core 模型绑定与之前版本的不同-FromBody 必须对应Json格式
之前有一个用于七牛上传图片的Callback Url的WebAPI (之前是用.net4.0,运行正常)
代码如下:
// 七牛CallBack地址,CallbackBody内容name=upload/member/1.jpg&hash=Fn6qeQi4VDLQ347NiRm-RlQx_4O2
public object Post([FromBody]dynamic data)
{
ILog logger = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
logger.Info("data:" + data.ToString());
int status = -1;
try
{
string avator_url = data.name;
int startPos = "upload/member/".Length;
string member_id = avator_url.Substring(startPos, avator_url.IndexOf(".jpg") - startPos);
MemberHelper.UpdateAvator(member_id, avator_url);
var json = new { results = new string[0], status = 0 };
return json;
}
catch (Exception ex)
{
string msg = ex.Message + ex.StackTrace;
logger.Error("\r\n data:" + data.ToString() + "\r\nException:" + msg, ex);
var json = new { results = new string[0], status = status, msg = msg };
return json;
}
}
现在同样的代码在.net Core 却提示 HTTP 415 错误 – 不支持的媒体类型(Unsupported media type)
请参考这篇文章: https://www.cnblogs.com/CreateMyself/p/6246977.html
里面提到 ASP.NET MVC/WebAPi中无论是以表单POST的形式抑或JSON的形式控制器具有绑定都Http请求Body的能力同时数据都会返回给我们，我们不需要做出任何特别的说明
七牛CallBack的URL格式应该是用表单POST的形式(contentType: "application/x-www-form-urlencoded").
.net core mvc 模型绑定，默认的参数绑定类型是FromForm
FromQuery,对应 url 中的 urlencoded string （"?key1=value1&key2=value2"）。
FromForm,对应 request content 中的 urlencoded string（"key1=value1&key2=value2"）。
FromBody,对应 request content 中的 JSON string（"{"key1":"value1","key2":"value2"}"）。
.NET Core 则严格限制了, Post([FromBody]dynamic data) 这个写法, 必须对应参数类型是JSON格式( contentType: "application/json"),否则会出现415错误
我们可以做的就是写2个方法,无论七牛用那个方法去调用,都能正确返回.
// 七牛CallBack地址,CallbackBody内容name=upload/member/memberId.jpg&hash=Fn6qeQi4VDLQ347NiRm-RlQx_4O2
[AllowAnonymous]
[HttpPost("updateAvatorJSON")]
public object Post([FromBody]dynamic data)
{
int status = -1;
try
{
updateAvator(data.name);
var json = new { results = "", status = 0 };
return json;
}
catch (Exception ex)
{
string msg = ex.Message + ex.StackTrace;
var json = new { results = "", status = status, msg = msg };
return json;
}
}
[AllowAnonymous]
[HttpPost("updateAvatorForm")]
public object Post(string name, string hash)
{
int status = -1;
try
{
updateAvator(name);
var json = new { results = "", status = 0 };
return json;
}
catch (Exception ex)
{
string msg = ex.Message + ex.StackTrace;
var json = new { results = "", status = status, msg = msg };
return json;
}
}
**********后记---- 在微信小程序wx.request时,再次碰到类似的问题*************
客户端:
wx.request({
url: url,
method: ‘POST‘,
header: { "Content-Type": "application/x-www-form-urlencoded" },
data: dataParam,
success: function (res) {
}})
对应的服务器端代码必须用[FromForm]修饰,不然取不到数据. 因为.net core 默认只找QueryString
[HttpPost]
public dynamic Post(
[FromForm]string CustomOrderNumber,
[FromForm]int CustomerId
)
{}
------------------------------------------------------------------------------------------------------
如果 客户端用 "Content-Type": "application/json", 则服务器端必须用[FromBody]
------------------------------------------------------------------------------------------------------
服务器端的[FromForm]和[FromBody]不能混用, api接口要么就一个大对象,要么就要把其他的参数放在QueryString里
public dynamic Post(
string CustomOrderNumber,
int CustomerId,
[FromBody]OrderItemDTO[] Items
)
原文地址：https://www.cnblogs.com/lonelyxmas/p/11125534.html