Multiple image uploading issue in xamarin.forms app [duplicate] - xamarin

Question

In my xamarin forms. I am trying to send multiple images and files using mulipart-formdata.The API team work on back end gave me this structure.
As you can see there is a parameter called "notification_files" which will send images and files selected using Media.Plugin and filepicker plugin in my app. I know how to send data in normal way. But how can I send these formadata using httpclient in xamarin.forms?The API team gave me their equivalent Restsharp code:
var client = new RestClient("{{api_url}}/MYData");
client.Timeout = -1;
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "bearer {{token}}");
request.AddHeader("Content-Type", "application/json");
request.AlwaysMultipartFormData = true;
request.AddParameter("ids", " [{\"id\":1,\"person_id\":5}]");
request.AddParameter("title", " Test");
request.AddParameter("description", " Test");
request.AddParameter("send_text_message", " true");
request.AddParameter("text_message", " Test");
request.AddParameter("notification_type"," global");
request.AddParameter("my_files", "[
{
\"name\": \"abc.jpg\",
\"key\": \"1583307983694\"
}
]");
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);
How can I write this using HttpClient?
What I have tried
try {
MultipartFormDataContent multiContent = new MultipartFormDataContent();
foreach (SelectedDocumentModel model in SelectedFileData)
{
byte[] byteArray = Encoding.UTF8.GetBytes(model.Path);
MemoryStream stream = new MemoryStream(byteArray);
HttpContent fileStreamContent1 = new StreamContent(stream);
fileStreamContent1.Headers.ContentDisposition = new
System.Net.Http.Headers.ContentDispositionHeaderValue("form-data")
{
Name = model.FileName,
FileName = model.FileName
};
fileStreamContent1.Headers.ContentType = new
System.Net.Http.Headers.MediaTypeHeaderValue("application/octet-stream");
multiContent.Add(fileStreamContent1);
}
multiContent.Add(new StringContent(notificationdetails[0]), "title");
multiContent.Add(new StringContent(notificationdetails[1]), "description");
multiContent.Add(new StringContent(notificationdetails[3]), "type");
multiContent.Add(new StringContent(notificationdetails[7]), "send_text_message");
multiContent.Add(new StringContent(notificationdetails[2]), "text_message");
multiContent.Add(new StringContent(notificationdetails[8]), "send_email");
multiContent.Add(new StringContent(notificationdetails[9]), "notification_type");
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Authorization =
new AuthenticationHeaderValue("bearer",Settings.AuthToken);
var response = await client.PostAsync(url, multiContent);
var responsestr = response.Content.ReadAsStringAsync().Result;
await DisplayAlert("Result", responsestr.ToString(), "ok");
}
catch (Exception ex)
{
await DisplayAlert("Result", ex.Message.ToString(), "ok");
}
DataManager is my observable collection contains images and files selected.
Selecting image using media.plugin and allocating to my observable collection
var Filename = Path.GetFileName(file.Path);
var FilePath = file.Path;
var newList = new SelectedDocumentModel()
{
FileName = Filename,
SelectedImage = imageSource,
IsLoadingVisible = false,
Path = FilePath
};
DataManager.Add(newList);
Any help is appreicted.

Answer 1

I done it like this
MultipartFormDataContent multiContent = new MultipartFormDataContent();
multiContent.Headers.ContentType.MediaType = "multipart/form-data";
foreach (SelectedDocumentModel model in SelectedFileData)
{
var upfilebytes = File.ReadAllBytes(model.Path);
multiContent.Add(new ByteArrayContent(upfilebytes, 0, upfilebytes.Count()), "notification_files", model.FileName);
}
multiContent.Add(new StringContent(notificationdetails[0]), "title");
multiContent.Add(new StringContent(notificationdetails[1]), "description");
multiContent.Add(new StringContent(notificationdetails[3]), "type");
multiContent.Add(new StringContent(notificationdetails[7]), "send_text_message");
multiContent.Add(new StringContent(notificationdetails[2]), "text_message");
multiContent.Add(new StringContent(notificationdetails[8]), "send_email");
multiContent.Add(new StringContent(notificationdetails[9]), "notification_type");
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Authorization =
new AuthenticationHeaderValue("bearer",Settings.AuthToken);
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));