C# Post上傳文件

using CsharpHttpHelper;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace PostImage
{
    public partial class Form1 : Form
    {
        bool mAutoPost = false;
        bool mIsExit = false;
        int mLoopNum = 0;

        public Form1()
        {
            InitializeComponent();
            (new Thread(threadAutoPost)).Start();
        }

        public void threadAutoPost()
        {
            int num = 1;
            while(mIsExit == false)
            {
                Thread.Sleep(1000);
                if (mAutoPost)
                {
                    for(int i = 0; i <= 100; ++i)
                    {
                        doAutoPost();
                        mLoopNum += 1;
                    }
                }
            }
        }

        public void doAutoPost()
        {
            string Question = "test2020" + mLoopNum;
            string imgDir = @"E:\work\tmp\AI\demo\pic3";
            string[] files = Directory.GetFiles(imgDir);
            foreach (string file in files)
            {
                string imgPath = Path.Combine(imgDir, file);
                autoPost(Question, imgPath);
            }
        }


        public void autoPost(string Question, string imagePath)
        {
            string[] arrFileName = Path.GetFileName(imagePath).Split('_');
            if (arrFileName.Length != 2) return;

            string RequestId = "RI123456";
            string UserName = "test";
            string Password = "test";
            //string Question = "test2020";
            //string Answer = "1234";
            string Answer = arrFileName[0];
            string boundary = "------E6DA7D5FD362467EAA74F8228F313B34";

            HttpHelper http = new HttpHelper();
            HttpItem item = new HttpItem();
            item.URL = "http://127.0.0.1/train";
            item.Method = "Post";
            item.ContentType = "multipart/form-data; boundary=----E6DA7D5FD362467EAA74F8228F313B34";
            item.Referer = "http://127.0.0.1/train";
            item.UserAgent = "Mozilla/4.0 (compatible; MSIE 9.0; Windows NT 6.1)";

            byte[] postData = null;
            StringBuilder strBuilder = new StringBuilder();

            strBuilder.Append(boundary).Append("\r\n");
            strBuilder.Append("Content-Disposition: form-data; name=\"RequestId\"").Append("\r\n\r\n");
            strBuilder.Append(RequestId).Append("\r\n");

            strBuilder.Append(boundary).Append("\r\n");
            strBuilder.Append("Content-Disposition: form-data; name=\"UserName\";").Append("\r\n\r\n");
            strBuilder.Append(UserName).Append("\r\n");

            strBuilder.Append(boundary).Append("\r\n");
            strBuilder.Append("Content-Disposition: form-data; name=\"Password\";").Append("\r\n\r\n");
            strBuilder.Append(Password).Append("\r\n");

            strBuilder.Append(boundary).Append("\r\n");
            strBuilder.Append("Content-Disposition: form-data; name=\"Question\";").Append("\r\n\r\n");
            strBuilder.Append(Question).Append("\r\n");

            strBuilder.Append(boundary).Append("\r\n");
            strBuilder.Append("Content-Disposition: form-data; name=\"Answer\";").Append("\r\n\r\n");
            strBuilder.Append(Answer).Append("\r\n");

            strBuilder.Append(boundary).Append("\r\n");
            strBuilder.Append("Content-Disposition: form-data; name=\"Image\";").Append("\r\n\r\n");

            Encoding webEncoding = Encoding.UTF8;
            postData = webEncoding.GetBytes(strBuilder.ToString());
            byte[] PicBytes = ImageToBytesFromFilePath(imagePath);
            postData = ComposeArrays(postData, PicBytes);

            string tail = "\r\n" + boundary + "--";
            postData = ComposeArrays(postData, webEncoding.GetBytes(tail));

            item.PostDataType = CsharpHttpHelper.Enum.PostDataType.Byte;
            item.PostdataByte = postData;
            item.Accept = "*/*";
            item.Header.Add("Accept-Language", "zh-cn");

            item.PostEncoding = webEncoding;
            HttpResult result = http.GetHtml(item);
            //MessageBox.Show(result.Html);
            string strLog = string.Format("{0} {1}", DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss"), result.Html);
            this.BeginInvoke((ThreadStart)delegate()
            {
                labelIMsg.Text = strLog;
            });
        }

        private void btnPostImage_Click(object sender, EventArgs e)
        {
            string RequestId = "RI123456";
            string UserName = "test";
            string Password = "test";
            string Question = "test2020";
            string Answer = "1234";
            string boundary = "------E6DA7D5FD362467EAA74F8228F313B34";

            HttpHelper http = new HttpHelper();
            HttpItem item = new HttpItem();
            item.URL = "http://127.0.0.1/train";
            item.Method = "Post";
            item.ContentType = "multipart/form-data; boundary=----E6DA7D5FD362467EAA74F8228F313B34";
            item.Referer = "http://127.0.0.1/train";
            item.UserAgent = "Mozilla/4.0 (compatible; MSIE 9.0; Windows NT 6.1)";

            byte[] postData = null;
            StringBuilder strBuilder = new StringBuilder();

            strBuilder.Append(boundary).Append("\r\n");
            strBuilder.Append("Content-Disposition: form-data; name=\"RequestId\"").Append("\r\n\r\n");
            strBuilder.Append(RequestId).Append("\r\n");

            strBuilder.Append(boundary).Append("\r\n");
            strBuilder.Append("Content-Disposition: form-data; name=\"UserName\";").Append("\r\n\r\n");
            strBuilder.Append(UserName).Append("\r\n");

            strBuilder.Append(boundary).Append("\r\n");
            strBuilder.Append("Content-Disposition: form-data; name=\"Password\";").Append("\r\n\r\n");
            strBuilder.Append(Password).Append("\r\n");

            strBuilder.Append(boundary).Append("\r\n");
            strBuilder.Append("Content-Disposition: form-data; name=\"Question\";").Append("\r\n\r\n");
            strBuilder.Append(Question).Append("\r\n");

            strBuilder.Append(boundary).Append("\r\n");
            strBuilder.Append("Content-Disposition: form-data; name=\"Answer\";").Append("\r\n\r\n");
            strBuilder.Append(Answer).Append("\r\n");

            strBuilder.Append(boundary).Append("\r\n");
            strBuilder.Append("Content-Disposition: form-data; name=\"Image\";").Append("\r\n\r\n");

            Encoding webEncoding = Encoding.UTF8;
            postData = webEncoding.GetBytes(strBuilder.ToString());
            byte[] PicBytes = ImageToBytesFromFilePath(@"E:\work\img.png");
            postData = ComposeArrays(postData, PicBytes);

            string tail = "\r\n" + boundary + "--";
            postData = ComposeArrays(postData, webEncoding.GetBytes(tail));

            item.PostDataType = CsharpHttpHelper.Enum.PostDataType.Byte;
            item.PostdataByte = postData;
            item.Accept = "*/*";
            item.Header.Add("Accept-Language", "zh-cn");

            item.PostEncoding = webEncoding;
            HttpResult result = http.GetHtml(item);
            //MessageBox.Show(result.Html);
            string strLog = string.Format("{0} {1}", DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss"), result.Html);
            this.BeginInvoke((ThreadStart)delegate()
            {
                labelIMsg.Text = strLog;
            });
        }

        private byte[] ImageToBytesFromFilePath(string FilePath)
        {
            FileInfo fInfo = new FileInfo(FilePath);
            long fileLen = fInfo.Length;
            FileStream fs = new FileStream(FilePath, FileMode.Open);
            BinaryReader br = new BinaryReader(fs);
            byte[] data = br.ReadBytes((int)fileLen);
            br.Close();
            fs.Close();
            return data;
        }

        public static byte[] ComposeArrays(byte[] Array1, byte[] Array2)
        {
            byte[] Temp = new byte[Array1.Length + Array2.Length];
            Array1.CopyTo(Temp, 0);
            Array2.CopyTo(Temp, Array1.Length);
            return Temp;
        }

        private void chbAutoPost_CheckedChanged(object sender, EventArgs e)
        {
            mAutoPost = chbAutoPost.Checked;
        }



    }
}