Question

我的习俗复杂,我想利用网站预报系统开展工作。

public class Widget
{
    public int ID { get; set; }
    public string Name { get; set; }
    public decimal Price { get; set; }
}

这里是我的网络APIC控制器方法。我想把这个目标说成是:

public class TestController : ApiController
{
    // POST /api/test
    public HttpResponseMessage<Widget> Post(Widget widget)
    {
        widget.ID = 1; // hardcoded for now. TODO: Save to db and return newly created ID

        var response = new HttpResponseMessage<Widget>(widget, HttpStatusCode.Created);
        response.Headers.Location = new Uri(Request.RequestUri, "/api/test/" + widget.ID.ToString());
        return response;
    }
}

我现在要使用<代码>System.Net.HttpClient,使这一方法得到呼吁。然而,我不了解什么类型的物体进入<代码>PostAsync方法,以及如何构建这种方法。这里有一些客户代码样本。

var client = new HttpClient();
HttpContent content = new StringContent("???"); // how do I construct the Widget to post?
client.PostAsync("http://localhost:44268/api/test", content).ContinueWith(
    (postTask) =>
    {
        postTask.Result.EnsureSuccessStatusCode();
    });

我如何创建<代码> HttpContent 的标语是,网络信息预报系统可以理解吗?

Answer 1

The general HttpRequestMessage<T> has been removed. :

new HttpRequestMessage<Widget>(widget)

页: 1

相反,,伙伴关系。 NET小组包括一些新的,以支持这一功能:

HttpClient.PostAsJsonAsync<T>(T value) sends “application/json”
HttpClient.PostAsXmlAsync<T>(T value) sends “application/xml”

因此,新的法典(,从dunston 开始:

Widget widget = new Widget()
widget.Name = "test"
widget.Price = 1;

HttpClient client = new HttpClient();
client.BaseAddress = new Uri("http://localhost:44268");
client.PostAsJsonAsync("api/test", widget)
    .ContinueWith((postTask) => postTask.Result.EnsureSuccessStatusCode() );

Answer 2

页: 1 相反,这是一种通用的方法,将服务投入的序列化。

Widget widget = new Widget()
widget.Name = "test"
widget.Price = 1;

HttpClient client = new HttpClient();
client.BaseAddress = new Uri("http://localhost:44268/api/test");
client.SendAsync(new HttpRequestMessage<Widget>(widget))
    .ContinueWith((postTask) => postTask.Result.EnsureSuccessStatusCode() );

如果你不希望创建具体类别,你可以采用<代码>。表格UrlEncodedContent

var client = new HttpClient();

// This is the postdata
var postData = new List<KeyValuePair<string, string>>();
postData.Add(new KeyValuePair<string, string>("Name", "test"));
postData.Add(new KeyValuePair<string, string>("Price ", "100"));

HttpContent content = new FormUrlEncodedContent(postData); 

client.PostAsync("http://localhost:44268/api/test", content).ContinueWith(
    (postTask) =>
    {
        postTask.Result.EnsureSuccessStatusCode();
    });

注:您的背书必须是一纸空文(int?)。

Answer 3

Note that if you are using a Portable Class Library, HttpClient will not have PostAsJsonAsync method. To post a content as JSON using a Portable Class Library, you will have to do this:

HttpClient client = new HttpClient();
HttpContent contentPost = new StringContent(argsAsJson, Encoding.UTF8, 
"application/json");

await client.PostAsync(new Uri(wsUrl), contentPost).ContinueWith(
(postTask) => postTask.Result.EnsureSuccessStatusCode());

Answer 4

如果你想要其他答复中提到的便利方法,但需要可携带性(或者即使你不这样做),你可能要检查。 [披露:我是作者]。 (次)包装<代码>HttpClient和Json。 NET和增加一些流食糖和其他商品,包括一些 b-in 。

员额为:

var resp = await "http://localhost:44268/api/test".PostJsonAsync(widget);

或URL-encoded:

var resp = await "http://localhost:44268/api/test".PostUrlEncodedAsync(widget);

以上两个例子都附有<代码>。缩略语

T poco = await url.PostJsonAsync(data).ReceiveJson<T>();
dynamic d = await url.PostUrlEncodedAsync(data).ReceiveJson();
string s = await url.PostUrlEncodedAsync(data).ReceiveString();

Flurl is available on NuGet:

PM> Install-Package Flurl.Http

Answer 5

在调查大量替代品后,我采取了另一种做法,适合AP2.0版本。

(VB)。 NET是我所偏爱的、 so的。

Public Async Function APIPut_Response(ID as Integer, MyWidget as Widget) as Task(Of HttpResponseMessage)
    Dim DesiredContent as HttpContent = New StringContent(JsonConvert.SerializeObject(MyWidget))
    Return Await APIClient.PutAsync(String.Format("api/widget/{0}", ID), DesiredContent)
End Function

Good luck! For me this worked out (in the end!).

Regards, Peter

Answer 6

我认为你可以这样做:

var client = new HttpClient();
HttpContent content = new Widget();
client.PostAsync<Widget>("http://localhost:44268/api/test", content, new FormUrlEncodedMediaTypeFormatter())
    .ContinueWith((postTask) => { postTask.Result.EnsureSuccessStatusCode(); });

Answer 7

In case someone like me didn t really understand what all above are talking about, I give an easy example which is working for me. If you have a web api which url is "http://somesite.com/verifyAddress", it is a post method and it need you to pass it an address object. You want to call this api in your code. Here what you can do.

    public Address verifyAddress(Address address)
    {
        this.client = new HttpClient();
        client.BaseAddress = new Uri("http://somesite.com/");
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        var urlParm = URL + "verifyAddress";
        response = client.PostAsJsonAsync(urlParm,address).Result;
        var dataObjects = response.IsSuccessStatusCode ? response.Content.ReadAsAsync<Address>().Result : null;
        return dataObjects;
    }

Answer 8

This is the code I wound up with, based upon the other answers here. This is for an HttpPost that receives and responds with complex types:

Task<HttpResponseMessage> response = httpClient.PostAsJsonAsync(
                       strMyHttpPostURL,
                       new MyComplexObject { Param1 = param1, Param2 = param2}).ContinueWith((postTask) => postTask.Result.EnsureSuccessStatusCode());
                    //debug:
                    //String s = response.Result.Content.ReadAsStringAsync().Result;
                    MyOtherComplexType moct = (MyOtherComplexType)JsonConvert.DeserializeObject(response.Result.Content.ReadAsStringAsync().Result, typeof(MyOtherComplexType));

Answer 9

提供这样的服务:

public async void SaveActivationCode(ActivationCodes objAC)
{
    var client = new HttpClient();
    client.BaseAddress = new Uri(baseAddress);
    HttpResponseMessage response = await client.PutAsJsonAsync(serviceAddress + "/SaveActivationCode" + "?apiKey=445-65-1216", objAC);
}

类似服务方法:

public HttpResponseMessage PutSaveActivationCode(ActivationCodes objAC)
{
}

PutAsJsonAsync关注网络的空气化和脱硫化。

友情链接