c# - Angular 2 发布数据在 asp.net MVC 中为空

Question

我使用 Angular 2 和 ASP.Net MVC。向服务器发送数据(getData 方法)时收到空值。为了测试，我尝试使用 jquery ajax 发送一个 post 请求，一切顺利。请告诉我问题是什么？

属性.服务.ts

import { Injectable }     from '@angular/core';
import { Http, Response } from '@angular/http';
import { Headers, RequestOptions } from '@angular/http';

import '../../../shared/rxjs-operators';
import { PropertyNode } from './property.model';

@Injectable()
export class PropertiesService {
    private headers = new Headers({ 'Content-Type': 'application/json' });
    private dataUrl = 'Editor/returnProperties';

    constructor(private http: Http) { }

    getData(FullName: string): Promise<PropertyNode[]> {
        let body = JSON.stringify({ FullName: FullName});
        let options = new RequestOptions({
            headers: this.headers
        });

        return this.http.post(this.dataUrl, body, this.headers)
            .toPromise()
            .then(this.extractData)
            .catch(this.handleError);
    }

    private extractData(res: Response): PropertyNode[] {
        let data = res.json();
        let properties: PropertyNode[] = [];
        console.log(data)
        return data;
    }

    private handleError(error: any) {
        console.error('An error occurred', error);
        return Promise.reject(error.message || error);
    }
}

EditorController.cs

[HttpPost]
public JsonResult returnProperties(string FullName)
{
    try
    {
        PAVBaseDataItem node = IDE.MvcApplication.fDataProvider.RootItem.ChildItem(FullName);
        List<PAVBasePropertyItem> properties = node.PropertiesList();
        return Json(properties);
    }
    catch (Exception ex)
    {
    return Json("");
    }
} 

Screenshot c# debug , Screenshot chrome-devtools .

更新

更改了 properties.service.ts 并且它起作用了。方法 getData 中的所有更改:

getData(FullName: string): Promise<PropertyNode[]> {
        let body = JSON.stringify({ FullName });
        let headers = new Headers({ 'Content-Type': 'application/json' });
        let options = new RequestOptions({ headers: headers });

        return this.http.post(this.dataUrl, body, options)
            .toPromise()
            .then(this.extractData)
            .catch(this.handleError);
    }

Answer 1

更新你的 Controller 代码

[HttpPost]
public JsonResult returnProperties([FromBody]string FullName) // <--- Added FromBody
{
    try
    {
        PAVBaseDataItem node = IDE.MvcApplication.fDataProvider.RootItem.ChildItem(FullName);
        List<PAVBasePropertyItem> properties = node.PropertiesList();
        return Json(properties);
    }
    catch (Exception ex)
    {
    return Json("");
    }
} 

默认情况下，只有复杂的参数从正文中解析出来。