如何調用XML POST API

Question

我要打電話與POST參數的API，例如：

• URL = http://localhost/myAPI/
• ARGS =選項=藍色&類型=車

我看過XDocument，但不知道如何在請求中發送參數。我也不確定我會如何異步調用，即使我應該或者如果它更好/更容易在另一個線程中運行。

我會從我基於Windows的C＃應用​​程序調用此。

Answer 1

您可以使用​​的Upload methods之一。

WebClient client = new WebClient(); 
string response = client.UploadString(
        "http://localhost/myAPI/?options=blue&type=car", 
        "POST data"); 

Answer 2

從哪裏調用它？ JavaScript的？如果是這樣你可以使用jQuery：

http://api.jquery.com/jQuery.post/

$.post('http://localhost/myAPI/', { options: "blue", type="car"}, function(data) { 
    $('.result').html(data); 
}); 

數據將包含您的文章的結果。

如果從服務器端你可以使用HttpWebRequest並用你的params寫入它的流。

// Create a request using a URL that can receive a post. 
     WebRequest request = WebRequest.Create ("http://localhost/myAPI/"); 
     // Set the Method property of the request to POST. 
     request.Method = "POST"; 
     // Create POST data and convert it to a byte array. 
     string postData = "options=blue&type=car"; 
     byte[] byteArray = Encoding.UTF8.GetBytes (postData); 
     // Set the ContentType property of the WebRequest. 
     request.ContentType = "application/x-www-form-urlencoded"; 
     // Set the ContentLength property of the WebRequest. 
     request.ContentLength = byteArray.Length; 
     // Get the request stream. 
     Stream dataStream = request.GetRequestStream(); 
     // Write the data to the request stream. 
     dataStream.Write (byteArray, 0, byteArray.Length); 
     // Close the Stream object. 
     dataStream.Close(); 
     // Get the response. 
     WebResponse response = request.GetResponse(); 
     // Display the status. 
     Console.WriteLine (((HttpWebResponse)response).StatusDescription); 
     // Get the stream containing content returned by the server. 
     dataStream = response.GetResponseStream(); 
     // Open the stream using a StreamReader for easy access. 
     StreamReader reader = new StreamReader (dataStream); 
     // Read the content. 
     string responseFromServer = reader.ReadToEnd(); 
     // Display the content. 
     Console.WriteLine (responseFromServer); 
     // Clean up the streams. 
     reader.Close(); 
     dataStream.Close(); 
     response.Close(); 

Answer 3

要扔另一種選擇成環，你可能要考慮使用的HttpClient的PostAsync方法在.NET 4.5。一個公認的未經測試的刺：

 HttpClient client = new HttpClient(); 
     var task = client.PostAsync(string.Format("{0}{1}", "http://localhost/myAPI", "?options=blue&type=car"), null); 
     Car car = task.ContinueWith(
      t => 
      { 
       return t.Result.Content.ReadAsAsync<Car>(); 
      }).Unwrap().Result;