Answers

Error while consuming API into .NET 3.5 with VS2008 into Console App

Praveen Kumar

1.3k

Note:

The same code when I am execution on dotnetfiddle.net where framework version is v4.7. It is working perfectly. While the code I have written is compatible with v3.5

I am consuming an API into .NET 3.5 using Visual Studio 2008 using WebRequest. Following are the details of API:

Method:POST

ConetntType:application/x-www-form-urlencoded

With Three Parameters.

Key Value

ApiKey string

ApiOwner string

RequestBody json string

I am using the following code pattern.

WebRequest request = WebRequest.Create("https://hostname/RestWS/api/v1/order/orderPull");
request.Method = "POST";
string postData = "ApiOwner=sa&ApiKey=d564078......9530dec&RequestBody=";
postData = postData + "{ \"orderNo\":\"o81075084\",\n \"statuses\":[],\n \"fromDate\":\"\",\n \"toDate\":\"\",\n \"pageNumber\":\"\",\n \"order_Location\":\"\",\n \"IsReplacementOrder\":\"\",\n \"orderSource\":\"\",\n \"paymentType\":[\"Prepaid\",\"COD\"]\n }";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = byteArray.Length;
Stream dataStream = request.GetRequestStream(); //Error at this line
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();
WebResponse response = request.GetResponse();
Console.WriteLine(((HttpWebResponse)response).StatusDescription);
dataStream = response.GetResponseStream();
StreamReader reader = new StreamReader(dataStream);
string responseFromServer = reader.ReadToEnd();
Console.WriteLine(responseFromServer);
reader.Close();
dataStream.Close();
response.Close();