甚麼都略懂 就是不懂

這裡假設我需要傳送給前端的錯誤訊息是 "|object.property: xxx為必填|object.property:XXX格式不正確" 的時候
應該要怎麼寫我的Filter呢？

​
public class ValidateModelFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(HttpActionContext actionContext)
    {
        if (actionContext.ModelState.IsValid == false)
        {
            var sbError = new StringBuilder(128);
            foreach (var model in actionContext.ModelState)
            {
                var message = model.Value.Errors.FirstOrDefault().ErrorMessage;
                message = (string.IsNullOrEmpty(message)) ? model.Value.Errors.FirstOrDefault().Exception.Message : message;
                sbError.Append($"|{model.Key}:{message}");
            }

            actionContext.Response = actionContext.Request.CreateErrorResponse(
                HttpStatusCode.BadRequest, sbError.ToString());
        }
    }
}

​

 

[ValidateModelFilter]
public IHttpActionResult Post(LoginModel login)
{
   ...
}

 

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有時在會走之前你就得跑

你不解決問題 就等問題解決你