Setting a Webrequest's Body Data

Setting a WebRequest's body data

With HttpWebRequest.GetRequestStream

Code example from http://msdn.microsoft.com/en-us/library/d4cek6cc.aspx

string postData = "firstone=" + inputData;
ASCIIEncoding encoding = new ASCIIEncoding ();
byte[] byte1 = encoding.GetBytes (postData);

// Set the content type of the data being posted.
myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";

// Set the content length of the string being posted.
myHttpWebRequest.ContentLength = byte1.Length;

Stream newStream = myHttpWebRequest.GetRequestStream ();

newStream.Write (byte1, 0, byte1.Length);

From one of my own code:

var request = (HttpWebRequest)WebRequest.Create(uri);
request.Credentials = this.credentials;
request.Method = method;
request.ContentType = "application/atom+xml;type=entry";
using (Stream requestStream = request.GetRequestStream())
using (var xmlWriter = XmlWriter.Create(requestStream, new XmlWriterSettings() { Indent = true, NewLineHandling = NewLineHandling.Entitize, }))
{
    cmisAtomEntry.WriteXml(xmlWriter);
}

try 
{    
    return (HttpWebResponse)request.GetResponse();  
}
catch (WebException wex)
{
    var httpResponse = wex.Response as HttpWebResponse;
    if (httpResponse != null)
    {
        throw new ApplicationException(string.Format(
            "Remote server call {0} {1} resulted in a http error {2} {3}.",
            method,
            uri,
            httpResponse.StatusCode,
            httpResponse.StatusDescription), wex);
    }
    else
    {
        throw new ApplicationException(string.Format(
            "Remote server call {0} {1} resulted in an error.",
            method,
            uri), wex);
    }
}
catch (Exception)
{
    throw;
}

How to pass header and Body value using HttpWebRequest in C#?

Here is correct HttpWebRequest using:

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(pathapi);
    request.Method = "POST";
    string postData = "grant_type=client_credentials&client_id=ruban123&client_secret=123456";
    ASCIIEncoding encoding = new ASCIIEncoding();
    byte[] bytes = encoding.GetBytes(postData);

    request.ContentType = "application/x-www-form-urlencoded";

    request.ContentLength = bytes.Length;
    Stream newStream = request.GetRequestStream();
    newStream.Write(bytes, 0, bytes.Length);

    HttpWebResponse response = request.GetResponse() as HttpWebResponse;

HttpWebRequest approach is not relevant. Look at this question Setting Authorization Header of HttpClient

How can I Post data using HttpWebRequest?

You can do by this

var request = HttpWebRequest.Create("http://example.com/api/Phrase/GetJDTO");

var postData = "Jlpt = 2";
var data = Encoding.ASCII.GetBytes(postData);

request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;

using (var stream = request.GetRequestStream())
{
    stream.Write(data, 0, data.Length);
}

var response = (HttpWebResponse)request.GetResponse();

var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();

but I suggest you use HttpClient rather than HttpWebRequest in this case

Adding a json body to a POST with WebRequest

Solved it by just swapping to a simple async call.

public async Task<IEnumerable<Inventory>> CreateSale(IpPartial ipPartial, Inventory[] inventories)
        {
            string jsonString = new JavaScriptSerializer().Serialize(inventories);
            var data = new StringContent(jsonString, Encoding.UTF8, "application/json");
            var url = "http://localhost:5002/api/Sale/CreateSales";
            using var client = new HttpClient();
            var response = await client.PostAsync(url, data);
            string result = response.Content.ReadAsStringAsync().Result;

            return inventories;
            
        }

how to set up request body with httpWebRequest

You create the HttpWebRequest object, get the request stream, and write your parameters to it. The example at HttpRequest.GetRequestStream should point you in the right direction.

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