C#版的MsMultiPartFormData（适用于Silverlight平台上传二进流数据到服务器）

    在这之前，我已经写过了AS3版本的MsMultiPartFormData，给Flash上传Http的Form用，写过C++版的MsMultiPartFormData，给C++的朋友上传Http的Form用。在这里，再写一个C#版本的，呵呵，主要是想给Silverlight用的。具体代码如何下（至于Http的multipart/form-data格式，大家还是得去找资料来看看了）：

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#region summary

/*----------------------------------------------------------------------------
*
* 功能描述：    核心功能是什么
*
* 作    者：    qwliang
*
* 修改日期：    2010/10/10
*
* 职   责 ：   做些什么事情
*             
* 特   性 ：   有什么特点
*----------------------------------------------------------------------------*/

#endregion

using System;
using System.Collections;
using System.Text;
using System.Collections.Generic;

namespace MyRBS
{
    public class MsMultiPartFormData
    {
        private List<byte> formData;
        public String Boundary = "---------------------------7db1851cd1158";

        private String fieldName = "Content-Disposition: form-data; name=\"{0}\"";

        private String fileContentType = "Content-Type: {0}";
        private String fileField = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"";

        private Encoding encode = Encoding.GetEncoding("UTF-8");

        public MsMultiPartFormData()
        {
            formData = new List<byte>();
        }

        public void AddFormField(String FieldName, String FieldValue)
        {
            String newFieldName = fieldName;

            newFieldName = string.Format(newFieldName, FieldName);

            formData.AddRange(encode.GetBytes("--" + Boundary + "\r\n"));
            formData.AddRange(encode.GetBytes(newFieldName + "\r\n\r\n"));
            formData.AddRange(encode.GetBytes(FieldValue + "\r\n"));
        }

        public void AddFile(String FieldName, String FileName, byte[] FileContent, String ContentType)
        {
            String newFileField = fileField;
            String newFileContentType = fileContentType;

            newFileField = string.Format(newFileField, FieldName, FileName);

            newFileContentType = string.Format(newFileContentType, ContentType);

            formData.AddRange(encode.GetBytes("--" + Boundary + "\r\n"));
            formData.AddRange(encode.GetBytes(newFileField + "\r\n"));
            formData.AddRange(encode.GetBytes(newFileContentType + "\r\n\r\n"));

            formData.AddRange(FileContent);

            formData.AddRange(encode.GetBytes("\r\n"));
        }

        public void AddStreamFile(String FieldName, String FileName, byte[] FileContent)
        {
            AddFile(FieldName, FileName, FileContent, "application/octet-stream");
        }

        public void PrepareFormData()
        {
            formData.AddRange(encode.GetBytes("--" + Boundary + "--"));
        }

        public List<byte> GetFormData()
        {
            return formData;
        }
    }
}

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具体的调用例子如下：

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          WebRequest request = WebRequest.Create("http://localhost/Test.aspx");

           MsMultiPartFormData form = new MsMultiPartFormData();

           form.AddFormField("devilField", "中国人");

           FileStream file = new FileStream("F:\\\\Devil_Files\\My_File\\devil.jpg", FileMode.Open);
           byte[] bb = new byte[file.Length];
           file.Read(bb, 0, (int)file.Length);
           file.Close();

           form.AddStreamFile("fileUpload", "中国人图片.jpg", bb);
           form.PrepareFormData();

           request.ContentType = "multipart/form-data; boundary=" + form.Boundary;
           request.Method = "POST";

           Stream stream = request.GetRequestStream();
           foreach (var b in form.GetFormData())
           {
               stream.WriteByte(b);
           }
           stream.Close();

           WebResponse response = request.GetResponse();

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