C#HTTP POST檔案資料

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/// <summary>
/// 上傳檔案
/// </summary>
/// <param name="uriStr">伺服器網址</param>
/// <param name="name">http報文頭中name</param>
/// <param name="fileName">檔案名稱</param>
/// <param name="data">檔案資料</param>
/// <param name="offset">檔案資料起始位置</param>
/// <param name="count">檔案資料長度</param>
/// <returns></returns>

static public string Upload(string uriStr, string name, string fileName, byte[] data, int offset, int count)        {            try            {                var request = WebRequest.Create(uriStr);                request.Method = "POST";                var boundary = $"******{DateTime.Now.Ticks}***";                request.ContentType = $"multipart/form-data; boundary={boundary}";                boundary = $"--{boundary}";                using (var requestStream = request.GetRequestStream())                {                    var buffer = Encoding.ASCII.GetBytes(boundary + Environment.NewLine);                    requestStream.Write(buffer, 0, buffer.Length);                    buffer = Encoding.ASCII.GetBytes($"Content-Disposition: form-data; name=\"{name}\"; filename=\"{fileName}\"{Environment.NewLine}");                    requestStream.Write(buffer, 0, buffer.Length);                    buffer = Encoding.ASCII.GetBytes($"Content-Type: application/octet-stream{Environment.NewLine}{Environment.NewLine}");                    requestStream.Write(buffer, 0, buffer.Length);                    requestStream.Write(data, offset, count);                    buffer = Encoding.ASCII.GetBytes($"{Environment.NewLine}{boundary}--");                    requestStream.Write(buffer, 0, buffer.Length);                }                using (var response = request.GetResponse())                using (var responseStream = response.GetResponseStream())                using (var streamReader = new StreamReader(responseStream))                {                    return streamReader.ReadToEnd();                }            }            catch            {                return null;            }        }

 

C#HTTP POST檔案資料