Httpclient multipart/form-data post image and json same time
You can pass the parameter as a string content , check the below sample.
public async Task<JObject> ExecutePostAsync(Stream myStreem, string url, string token, string parameter1, string parameter2, string parameter3)
{
try
{
using (var content = new MultipartFormDataContent("----MyBoundary"))
{
using (var memoryStream = myStreem)
{
using (var stream = new StreamContent(memoryStream))
{
content.Add(stream, "file", Guid.NewGuid().ToString() + ".jpg");
content.Add(new StringContent(parameter1), "parameter1");
content.Add(new StringContent(parameter3), "parameter2");
content.Add(new StringContent(parameter3), "parameter3");
using (HttpClient client = new HttpClient())
{
client.DefaultRequestHeaders.Add("Authorization", "Bearer " + token);
var responce = await client.PostAsync(url, content);
string contents = await responce.Content.ReadAsStringAsync();
return (JObject.Parse(contents));
}
}
}
}
}
catch (Exception ex)
{
throw ex;
}
}
In API get the data from FORM request
public async Task<IHttpActionResult> UploadFile()
{
string parameter1 = HttpContext.Current.Request.Form["parameter1"];
string parameter2 = HttpContext.Current.Request.Form["parameter2"];
string parameter3 = HttpContext.Current.Request.Form["parameter3"];
}
Nininea
Xamarin Mobile Developer (Certified): Android platform IOS platform .Net Software Developer
Updated on June 04, 2022Comments
-
Nininea almost 2 years
I'm trying to upload image and json in one request using c# code, but server always returns 400- bad request. Executing same request using fiddler returns status code 200. help...
Here is my fiddler code :
------WebKitFormBoundary7MA4YWxkTrZu0gW Content-Disposition: form-data; name="application/json" Content-Type: application/json
{"type": "Personal","comments": ["Lorem", "Ipsum" ] } ------WebKitFormBoundary7MA4YWxkTrZu0gW-- Content-Disposition: form-data; name="fieldNameHere"; filename="1111.jpg"
Content-Type: image/jpeg
<@INCLUDE C:\Users\user\Desktop\New folder\1111.jpg@>
And implementation in c#:
var boundary = "Upload----" + DateTime.Now.Ticks.ToString(); MultipartFormDataContent form = new MultipartFormDataContent(boundary); StringContent content = new StringContent(bodyJson); content.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json"); form.Add(content, "application/json"); var imageContent = new ByteArrayContent(image); imageContent.Headers.ContentType = MediaTypeHeaderValue.Parse("image/jpeg"); form.Add(imageContent, "image/jpeg", "image.jpg"); var responseTask = _httpClient.PostAsync(url, form).Result;
the response is always same :