Question

我是REST API JSON的新手，但已经能够使用asp.net消耗一些API。这是我目前面临的问题。

我已经能够使用这种方法将JSON数据发送到API。

public void PostData()
{
    string sName = sysName.Text;
    string sDescrip = sysDescrip.Text;
    var httpclient = new HttpClient();
    httpclient.BaseAddress = new Uri("http://33.248.292.99:8094/bizzdesk/sysconfig/api/");
    var sys = new Bizsys(){name= sName, description= sDescrip};
    httpclient.PostAsJsonAsync("system", sys);
}

它运作得很好。

现在我修改代码以便容纳更多值：

var httpclient = new HttpClient();
// ArrayList paramList = new ArrayList();
httpclient.BaseAddress = new Uri("http://179.683.197.115:9091/tua-slte/api/organisations/");
var org = new Organisation() { id=1, name = "inno", abbreviation = "abx", type="school", sort = 7, isShow = true, createdBy=8, createdDate = "10/04/2017", editedBy = 11, editDate="11/04/2017"};
var bas = new Basic() { id=1, username = "inno", password = "123", firstName="Innocent", lastName="Ujata", email = "ea@bizz.co", mobile = "123456", photo="10201001", loginIp="127.0.0.1", loginDate="10/04/2017", locked=false, organisation = org, createdDate = "10/04/2017", editedBy = 11, editDate="11/04/2017", admin=true};
var org2 = new Organisation2() { id=1, name = "inno", abbreviation = "abx", type="school", sort = 7, isShow = true, createdBy=17, createdDate = "10/04/2017", editedBy = 09, editDate="11/04/2017"};
var hq = new HeadQuarter() { zonId=09, organisation = org2, zonCode = "123", zonName = "Abuja", zonAddress = "123456", zonCity = "Abuja", zonPostalCode = "120076", zonEmail = "answers", zonPhoneNumber = "0908765", zonFaxNumber = "1212", zonState = "FCT", createdBy=17, createdDate = "10/04/2017", editedBy = 11, editDate="11/04/2017", version=1};
var examp = new RootObject() {basic=bas, headQuarter=hq  };

var status = httpclient.PostAsJsonAsync("register", examp);
return status;

它一直在回复：

Id = 19, Status = WaitingForActivation, Method = "{null}", Result = "{Not yet computed}"

我对数据进行了硬编码，使其在动态化之前首先发挥作用。

我也试过使用await async方法，结果是一样的。我在这里看到的所有问题和答案都不相似。

这是什么意思，我错了什么？

Answer 1

您正在调用异步方法，但不等待它的结果。

变化：

var status = httpclient.PostAsJsonAsync("register", examp);

到

var status = await httpclient.PostAsJsonAsync("register", examp);

Answer 2

扩展方法PostAsJsonAsync返回Task<HttpResponseMessage>。你抓住这个任务，看看它的细节。如果要返回已完成请求的状态代码，则应等待任务完成，然后从响应消息中获取状态代码：

 private async Task<HttpStatusCode> PostSomethingAsync()
 {
     ...
     var response = await httpclient.PostAsJsonAsync("register", examp);
     return response.StatusCode;
 }

或者您可以同步等待请求完成：

 private HttpStatusCode PostSomething()
 {
     ...
     var response = httpclient.PostAsJsonAsync("register", examp).Result;
     return response.StatusCode;
 }

Answer 3

这是因为你没有等待这个电话，如

var status = await httpclient.PostAsJsonAsync("register", examp);

或者，使用ConfigureAwait()

var status = httpclient.PostAsJsonAsync("register", examp).ConfigureAwait(false);

C＃将JSON数据发布到REST API

3 个答案: