C# 使用Restsharp PCL上传到dropbox

我正在尝试使用RestSharp.Portable使用PCL将文件上载到Dropbox。我的代码是

public async Task<object> UploadFile(Stream fileStream, string fileName)
{
    var client = new RestClient("https://api-content.dropbox.com");
    client.ClearEncodings();
    client.AddEncoding("gzip", new GzipEncoding());

    var request = new RestRequest("1/files/dropbox/Apps/FileBolt", HttpMethod.Post);
    request.AddHeader("Authorization", string.Format("Bearer {0}", Token));
    request.AddParameter("file", fileName);

    byte[] bytes = null;
    long numBytes = fileStream.Length;

    using (var br = new BinaryReader(fileStream))
    {
        bytes = br.ReadBytes((int) numBytes);
    }

    request.AddFile(new FileParameter { ContentLength = numBytes, FileName = fileName, Name = "file", Value = bytes });

    var boxItemResponse = await client.Execute<Entities.Cloud.Dropbox.File>(request);
    if (boxItemResponse != null && boxItemResponse.Data != null)
    {
        return boxItemResponse.Data;
    }

    return null;
}

还有DropBox的响应

HTTP/1.1 400 Bad Request
Server: nginx
Date: Sat, 22 Mar 2014 12:16:07 GMT
Content-Type: application/json
Transfer-Encoding: chunked
Connection: keep-alive

2e
{"error": {"file": "Expecting a file upload"}}
0

我还删除了

request.AddParameter（“文件”，文件名）带有Dropbox的响应

{"error": "Forbidden"}

我做错了什么

注意：这个实现需要在一个PCL中，它将在WP8、Xamarin.Android、Xamarin.IOS和Windows WPF之间共享

更新：

虽然我以前尝试过PUT（files_PUT）api调用，但现在我已经成功了，因为我的应用程序只能访问自己的文件夹，所以我将路径改为sandbox而不是dropbox。以下是可能帮助他人的代码

public async Task<object> UploadFile(Stream fileStream, string fileName, string md5 = null)
{
    var client = new RestClient("https://api-content.dropbox.com");
    client.ClearEncodings();
    client.AddEncoding("gzip", new GzipEncoding());

    var request = new RestRequest(string.Format("1/files_put/sandbox/{0}", fileName), HttpMethod.Put);
    request.AddHeader("Authorization", string.Format("Bearer {0}", Token));

    byte[] bytes = null;
    long numBytes = fileStream.Length;

    using (var br = new BinaryReader(fileStream))
    {
        bytes = br.ReadBytes((int) numBytes);
    }

    var body = new Parameter
    {
        ContentType = new MediaTypeHeaderValue("application/octet-stream"),
        Name = "file",
        Value = bytes,
        Type = ParameterType.RequestBody,
        ValidateOnAdd = false
    };
    request.Parameters.Add(body);

    var response = await client.Execute<Entities.Cloud.Dropbox.File>(request);
    if (response != null && response.Data != null)
    {
        return response.Data;
    }

    return null;
}

不是多部分表单上载。正如文档所说“…整个帖子正文将被视为文件”

我会就如何构造正确的HTTP请求提供更多建议，但老实说，我甚至从未使用过这个端点，我建议您也不要使用。正如文档中所说，“我们建议您改用它，因为它的界面更简单。”我建议您使用它，并将文件内容添加为请求的主体。
感谢您发布了一个有效的解决方案。当网上没有很多关于上传二进制文件这类被认为是简单的事情时，这会有所帮助。
public async Task<object> UploadFile(Stream fileStream, string fileName, string md5 = null)
{
    var client = new RestClient("https://api-content.dropbox.com");
    client.ClearEncodings();
    client.AddEncoding("gzip", new GzipEncoding());

    var request = new RestRequest(string.Format("1/files_put/sandbox/{0}", fileName), HttpMethod.Put);
    request.AddHeader("Authorization", string.Format("Bearer {0}", Token));

    byte[] bytes = null;
    long numBytes = fileStream.Length;

    using (var br = new BinaryReader(fileStream))
    {
        bytes = br.ReadBytes((int) numBytes);
    }

    var body = new Parameter
    {
        ContentType = new MediaTypeHeaderValue("application/octet-stream"),
        Name = "file",
        Value = bytes,
        Type = ParameterType.RequestBody,
        ValidateOnAdd = false
    };
    request.Parameters.Add(body);

    var response = await client.Execute<Entities.Cloud.Dropbox.File>(request);
    if (response != null && response.Data != null)
    {
        return response.Data;
    }

    return null;
}

using System;
using Newtonsoft.Json;

namespace Entities.Cloud.Dropbox
{
    public class File
    {
        [JsonProperty(PropertyName = "size")]
        public string FriendlySize { get; set; }

        [JsonProperty(PropertyName = "bytes")]
        public int Size { get; set; }

        [JsonProperty(PropertyName = "path")]
        public string Path { get; set; }

        [JsonProperty(PropertyName = "is_dir")]
        public bool IsDirectory { get; set; }

        [JsonProperty(PropertyName = "is_deleted")]
        public bool IsDeleted { get; set; }

        [JsonProperty(PropertyName = "rev")]
        public string Revision { get; set; }

        [JsonProperty(PropertyName = "hash")]
        public string Hash { get; set; }

        [JsonProperty(PropertyName = "thumb_exists")]
        public bool ThumbnailExists { get; set; }

        [JsonProperty(PropertyName = "icon")]
        public string Icon { get; set; }

        [JsonProperty(PropertyName = "modified")]
        public DateTime Modified { get; set; }

        [JsonProperty(PropertyName = "root")]
        public string Root { get; set; }
    }
}