ftp 上传 问题 求解决

Question

问题：如果有加上图片显示pictureBox1.Image = Image.FromStream(fileStream);，上传的图片就全部为零字节。有什么办法解决吗？
代码如下：using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Threading;namespace myUpload
{
    public partial class form1 : Form
    {
        public form1()
        {
            InitializeComponent();
        }        //上传
        private FtpStatusCode UploadFun(string fileName)
        {            
            Stream requestStream = null;
            FileStream fileStream = null;
            FtpWebResponse uploadResponse = null;            //显示原文件路径
            label2.Text = fileName;
            label3.Text = "×";
            Application.DoEvents();
            label2.Refresh();
 
            //构造目标路径
            FileInfo fileInf = new FileInfo(fileName);
            string uploadUrl = "ftp://192.168.4.88/tempUpload/photo/" + fileInf.Name;            try
            {
                //连接ftp服务器
                FtpWebRequest uploadRequest = (FtpWebRequest)WebRequest.Create(uploadUrl);
                uploadRequest.Method = WebRequestMethods.Ftp.UploadFile;
                uploadRequest.Proxy = null;
                NetworkCredential nc = new NetworkCredential();
                nc.UserName = "dry";
                nc.Password = "";
                uploadRequest.Credentials = nc;                //上传
                requestStream = uploadRequest.GetRequestStream();
                fileStream = File.Open(fileName, FileMode.Open);
               
                //显示图片
                //pictureBox1.Image = Image.FromStream(fileStream);                byte[] buffer = new byte[1024];
                int bytesRead, i, t;
                i = Convert.ToInt32(fileStream.Length);
                t = i / 1024;                progressBar1.Value = 0;
                progressBar1.Maximum = t + 2;
                while (true)
                {                    bytesRead = fileStream.Read(buffer, 0, buffer.Length);
                    if (bytesRead == 0)
                    {
                        progressBar1.Value = progressBar1.Maximum;
                        label3.Text = "√";
                        Application.DoEvents();
                        break;                    }
                    else
                    {
                        requestStream.Write(buffer, 0, bytesRead);
                        progressBar1.Value++;                    }                }
                requestStream.Close();
                uploadResponse = (FtpWebResponse)uploadRequest.GetResponse();
                return uploadResponse.StatusCode;            }
            catch (UriFormatException ex)
            {
                MessageBox.Show(ex.Message);
            }
            catch (IOException ex)
            {
                MessageBox.Show(ex.Message);
            }
            catch (WebException ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                if (uploadResponse != null)
                    uploadResponse.Close();
                if (fileStream != null)
                    fileStream.Close();
                if (requestStream != null)
                    requestStream.Close();            }
            return FtpStatusCode.Undefined;
        }        private ParameterizedThreadStart ThreadStart()
        {
            throw new Exception("The method or operation is not implemented.");
        }        private void upLoadButton_Click(object sender, EventArgs e)
        {
            for (int i = 1; i <= 100; i++)
            {
                UploadFun(@"D:\My Documents\My Pictures\test\" + i + "_big.jpg");
            }
        }    }
}

Answer 1

把这句pictureBox1.Image = Image.FromStream(fileStream);放在return前面