Question

您好我有这个代码来运行我的api方法

export class MessageService {

    constructor(private http: Http) {

    }

    addMessage(textToSend: string) {
        return this.http.post("/api/SendMessage", textToSend); //<- Everytime i have some text in textToSend and this is ok 
    }
}

在我的Api中，我的参数等于null

[HttpPost]
[Route("/api/SendMessage")]
public void SendMessage(string msg) //null value
{
    //some code
}

Answer 1

您的控制器操作正在接受查询参数，而不是路由器参数或模型。

如果要接受路由参数，则需要将其添加到路由中。

如果要在正文中传递模型或值，则必须使用[FromBody]属性标记参数。

[HttpPost]
[Route("/api/SendMessage")]
public void SendMessage([FromBody]string msg)
{
    MessageBox MsgBox = new MessageBox();
    MsgBox.AddMsgToMsgBox(msg);
}

如果你没有定义任何东西，控制器希望参数作为查询/api/SendMessage?msg=someMessage传递（你不应该在REST服务中做，因为它不是很好＆＃34;的RESTful＆＃34;

Answer 2

可能的解决方案1：

addMessage(textToSend: string) {
    let body = JSON.stringify({ textToSend });
    let headers = new Headers({ 'Content-Type': 'application/json' });
    let options = new RequestOptions({ headers: headers });

    return this.http.post("/api/SendMessage/", body, options);
}

// Server side -1
[HttpPost]
[Route("/api/SendMessage")]
public void SendMessage([FromBody]IDictionary<string, string> msg)
{
    var textToSend = msg["textToSend"];
}

// Or create a model and use it

//Server side -2
public class Model
{
    public string textToSend { get; set; }
}
public void SendMessage([FromBody]Model model)

可能的解决方案2：

addMessage(textToSend: string) {
    return this.http.post("/api/SendMessage/" + textToSend);
}

[HttpPost]
[Route("/api/SendMessage/textToSend")]
public void SendMessage(string textToSend)
{
    //some code
}

Answer 3

试

 addMessage(textToSend: string) {
    return this.http.post("/api/SendMessage", msg); //<- Everytime i have some text in textToSend and this is ok 
}

更改变量的名称以匹配您在控制器中期望的名称

阿皮失去了失去的圣坛

3 个答案: