Question

Web API正在IIS中运行。我使用CLI来运行角度项目。 Http帖子两次点击Web API方法。首次使用的Web API参数为null。第二次带参数。

API

 [System.Web.Http.Route("api/Location/AddNewLocationSection")]
 [HttpPost]
 [AcceptVerbs("OPTIONS")]
 public GenericResult AddNewCustomerLocationSection(GenericParam<CustomerLocationSectionTreeItem> locationSectionParam)
 {
   //due to double post i'm doing this check
   if (locationSectionParam != null && locationSectionParam.Parameter != null)
   {
      //logic
   }
 }

角度服务

addNewLocationSection(locationSectionDetails: CustomerLocationSectionInfo): Observable<any> {
var headers = new Headers();
headers.append('Content-Type', 'application/json');
return this.http.post(this._configuration.AddNewLocation JSON.stringify({ parameter: locationSectionDetails }), new RequestOptions({ headers: headers }))
.map(this.extractData)
.catch(this.handleError);
}

组件

this.locationDetailService.addNewLocationSection(this.locationSectionDetails)
.subscribe(success => this.reLoadCustomerLocationTree(success, "Add"),
error => this.errorMessage = <any>error);

我怎么能避免这个双重帖子。提前谢谢。

Answer 1

如果你看第一个电话，那就是一个OPTIONS请求。这是浏览器发送的请求，用于检查端点的有效性。我认为你不能改变它！

You can find more information here

角4的双帖问题

1 个答案: