Skip to main content

I'm trying to use .net core 3, to invoke the Box REST API, to upload a small file.

The .net core code is based on the information provided on: Upload a file.

I haven't been successful so far, and all my attempts have resulted in a 400: Bad Request error.

 

This is code snippet:

 

var client = _clientFactory.CreateClient("box-upload");



var dto = new UploadFileContent() {

 attributes = new UploadFileContentAttributes() {

  name = fileDto.file.FileName,

   parent = new UploadFileContentParent() {

    id = fileDto.folderId

   }

 }

};

var content = new MultipartFormDataContent();

content.Headers.ContentType = MediaTypeHeaderValue.Parse("multipart/form-data");



var jsonContent = new StringContent(JsonConvert.SerializeObject(dto), Encoding.UTF8, "application/json");

jsonContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");

content.Add(jsonContent, "attributes");



if (!string.IsNullOrWhiteSpace(token))

 client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(BearerToken, token);



var streamContent = new StreamContent(fileDto.file.OpenReadStream());

content.Add(streamContent, "file");



var response = await client.PostAsync(url, content);

 

What am i missing?

Thank you in advance.

 

 


There were a few details missing, the code is now working:

 

 

var token = await GetToken();



if (string.IsNullOrWhiteSpace(token)) throw new Exception("Could not obtain Token");



var client = _clientFactory.CreateClient("box-upload");



using var content = new MultipartFormDataContent();

var attributes = new UploadFileContentAttributes {

 name = fileDto.file.FileName,

  parent = new UploadFileContentParent {

   id = fileDto.folderId

  }

};



using var jsonContent =

 new StringContent(JsonConvert.SerializeObject(attributes), Encoding.UTF8, "application/json");

content.Add(jsonContent, "attributes");



client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(BearerToken, token);



bytet] data;

using(var br = new BinaryReader(fileDto.file.OpenReadStream())) {

 data = br.ReadBytes((int) fileDto.file.OpenReadStream().Length);

}



using var bytes = new ByteArrayContent(data);



content.Add(bytes, "file", fileDto.file.FileName);



var response = await client.PostAsync(url, content);



if (!response.IsSuccessStatusCode) throw new Exception(response.ToString());



var jsonString = await response.Content.ReadAsStringAsync();

 


Reply


Terms & ConditionsCookie settings