C# 后 JSON 數據到 REST ZDB974238714CA8DE634A7CE1D083A14Z

Question

I am new to REST API JSON but have been able to consume a few API with asp.net. 這是我目前面臨的問題。

我已經能夠使用這種方法將 JSON 數據發送到 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);
}

它工作得很好。

現在我修改代碼以適應更多的值：

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;

它不斷返回：

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

我對數據進行了硬編碼，以便在使其成為動態之前先查看它的工作情況。

我也嘗試過使用 await async 方法，結果是一樣的。 我在這里看到的所有問題和答案都不相似。

這是什么意思，我做錯了什么？

Answer 1

您正在調用異步方法，但不等待它的結果。

改變：

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

至

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

Answer 2

擴展方法PostAsJsonAsync返回Task<HttpResponseMessage> 。 你抓住這個任務，看看它的細節。 如果要返回已完成請求的狀態碼，則應等待任務完成，然后從響應消息中獲取狀態碼：

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

或者您可以同步等待請求完成：

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

Answer 3

那是因為你沒有在等待電話

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

或者，使用ConfigureAwait()

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