[英]ASP.net MVC 3 - Getting posted JSON data in OnActionExecuting
Im posting data to an actin using the $.ajax method in jquery, specifying the data to be posted using the data field to pass the JSON stringified values. 我使用jquery中的$ .ajax方法将数据发布到肌动蛋白,指定要使用数据字段发布的数据以传递JSON字符串化值。
These are posted to the action OK but I cant get them in an OnActionExecuting action filter (they're not part of the Forms or Params collections). 这些被发布到操作OK但我无法在OnActionExecuting操作过滤器中获取它们(它们不是Forms或Params集合的一部分)。 Is there any way to get them and if not, could you tell share why not?
有没有办法得到它们,如果没有,你能告诉分享为什么不呢?
If your action takes a model: 如果您的操作采用模型:
[HttpPost]
public ActionResult About(SomeViewModel model)
{
return Json(model);
}
you could directly this parameter value because the JsonValueProviderFactory would have parsed it already: 您可以直接使用此参数值,因为JsonValueProviderFactory已经解析了它:
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
base.OnActionExecuting(filterContext);
SomeViewModel model = filterContext.ActionParameters["model"] as SomeViewModel;
}
If there is no model (why wouldn't there be?) you could read the JSON from the request stream: 如果没有模型(为什么不存在?),您可以从请求流中读取JSON:
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
base.OnActionExecuting(filterContext);
filterContext.HttpContext.Request.InputStream.Position = 0;
using (var reader = new StreamReader(filterContext.HttpContext.Request.InputStream))
{
string json = reader.ReadToEnd();
}
}
protected override void OnActionExecuting(ActionExecutingContext ctx) {
//All my viewDto end with "viewDto" so following command is used to find them
KeyValuePair<string, object> dto = ctx.ActionParameters.FirstOrDefault(item =>
item.Key.ToLower().EndsWith("viewdto")
);
string postedData;
if (dto.Key != null) {
object viewData = dto.Value;
if (dto.Key.ToLower() == "viewdto") {
var stdStoryViewDto = dto.Value as StandardStoryViewDto;
//removing unnecessary stuff
stdStoryViewDto.Industries.Clear();
stdStoryViewDto.TimeZones.Clear();
viewData = stdStoryViewDto;
}
postedData = JsonConvert.SerializeObject(viewData);
} else {
postedData = string.Join(",",
Array.ConvertAll(ctx.ActionParameters.Keys.ToArray(),
key => key + "=" + ctx.ActionParameters[key])
);
}
}
postedData variable contains data in JSON format that was sent to action postingData变量包含发送到操作的JSON格式的数据
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