C# winform 文件浏览选择上传至本地服务器HttpWebClient+调用本地文件夹

服务器端 新建aspx页面，部署网站：http://localhost:4944/UploadFileWebSite/Default.aspx

在Page_Load写入代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        foreach (string f in Request.Files.AllKeys)
        {
            HttpPostedFile file = Request.Files[f];
            file.SaveAs(@"d:\TestFileUP\" + file.FileName);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Text;

namespace FileUD
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        
        //private void UpLoadFile1(string fileNamePath, string uriString)
        //{
        //    //string fileName = fileNamePath.Substring(fileNamePath.LastIndexOf("\\") + 1);
        //    string NewFileName = DateTime.Now.ToString("yyMMddhhmmss") + DateTime.Now.Millisecond.ToString() + fileNamePath.Substring(fileNamePath.LastIndexOf("."));

        //    string fileNameExt = fileNamePath.Substring(fileNamePath.LastIndexOf(".") + 1);
        //    if (uriString.EndsWith("/") == false) uriString = uriString + "/";

        //    uriString = uriString + NewFileName;
        //    /**/
        //    /// 创建WebClient实例
        //    WebClient myWebClient = new WebClient();
        //    myWebClient.Credentials = CredentialCache.DefaultCredentials;

        //    // 要上传的文件
        //    FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
        //    //FileStream fs = OpenFile();
        //    BinaryReader r = new BinaryReader(fs);
        //    try
        //    {
        //        //使用UploadFile方法可以用下面的格式
        //        //myWebClient.UploadFile(uriString,"PUT",fileNamePath);
        //        byte[] postArray = r.ReadBytes((int)fs.Length);
        //        Stream postStream = myWebClient.OpenWrite(uriString, "PUT");
        //        if (postStream.CanWrite)
        //        {
        //            postStream.Write(postArray, 0, postArray.Length);
        //        }
        //        else
        //        {
        //            MessageBox.Show("文件目前不可写！");
        //        }
        //        postStream.Close();
        //    }
        //    catch
        //    {
        //        MessageBox.Show("文件上传失败，请稍候重试~");
        //    }
        //}

        //浏览文件
        private void btnLL_Click(object sender, EventArgs e)
        {
            //this.openFileDialog1.Filter = "jpg文件(*.jpg)|*.jpg|gif文件(*.gif)|*.gif";
            this.openFileDialog1.Filter = "所有文件(*.*)|*.*";

            if (this.openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                /*
                string PicFileName = this.openFileDialog1.FileName;
                this.imgList.Add(PicFileName);
                this.imageList1.Images.Add(Image.FromFile(PicFileName));
                 */
                string FileName = this.openFileDialog1.FileName;
                txtFileLJ.Text = FileName;                
            }
        }

        ///WebClient的UploadFile方法
        public bool uploadFileByHttp(string webUrl,string localFileName)
        {
            // 检查文件是否存在
            if (!System.IO.File.Exists(localFileName)) 
            {
                MessageBox.Show("请选择需要上传的文件!",localFileName);
                return false;
            }
            try
            {
                System.Net.WebClient myWebClient = new System.Net.WebClient();
                myWebClient.UploadFile(webUrl, "POST", localFileName);
                MessageBox.Show("上传成功！", "上传状态：", MessageBoxButtons.OKCancel);
                txtFileLJ.Text = "";
            }
            catch
            {               
                return false;
            }
           
            finally
            {
                MessageBox.Show("文件上传出现异常，未能上传成功！");
            }
            return true;
            
        }


        //本地上传文件
        private void btnUpLoad_Click(object sender, EventArgs e)
        {
            //调用ftpUP类的方法UploadFile(FileInfo fileinfo, string targetDir, string hostname, string username, string password, string fileName)
            /// 需要上传的文件
            /// 目标路径
            /// ftp地址
            /// ftp用户名
            /// ftp密码
            /// 
            //ftpUP ftp = new ftpUP();
            //ftp.UploadFile();

            //UpLoadFile1(txtFileLJ.Text, "192.168.1.104");
            //uploadimg();

            //调用UploadFile方法
            //UploadFile(txtFileLJ.Text, txtFileLJ.Text, true);
            this.uploadFileByHttp("http://localhost:4944/UploadFileWebSite/Default.aspx", txtFileLJ.Text);

        }
        /// 

        /// 浏览文件夹
        /// 
        /// 
        /// 
        private void btnShowFileInfo_Click(object sender, EventArgs e)
        {
            folderBrowserDialog1.RootFolder = Environment.SpecialFolder.Desktop;
            folderBrowserDialog1.Description = "请选择文件夹";
            DialogResult d = folderBrowserDialog1.ShowDialog();
            if (d == DialogResult.OK)
            {
                //txtFilesName指的是界面一个文本框获取路径
                txtFilesName.Text = folderBrowserDialog1.SelectedPath;
            }
            else
                txtFilesName.Text = "请选择目录！";
        }
        /// 

        /// 退出程序
        /// 
        /// 
        /// 
        private void btnClear_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
        /// 

        /// 浏览服务器的文件路径
        /// 
        /// 
        /// 
        private void btnServerLL_Click(object sender, EventArgs e)
        {
            //显示目录路径
            System.Diagnostics.Process.Start("Explorer.exe", @"\\192.168.1.1\d$\公共区\");
        }
        /// 

        /// 调用资源管理器
        /// 
        /// 
        /// 
        private void button1_Click(object sender, EventArgs e)
        {
            System.Diagnostics.Process.Start("Explorer.exe", @"d:\TestFileUP\");
        }
        

        /*
        public void uploadimg()
        {
            FileInfo fileInf = new FileInfo(txtFileLJ.Text);
            string uri = @"http://www.rnkeysoft.com/"+txtFileLJ.Text.Substring(txtFileLJ.Text.LastIndexOf('\\'));
            HttpWebRequest reqHttp;
            reqHttp = (HttpWebRequest)HttpWebRequest.Create(uri);
            //reqHttp.UseBinary = true;
            reqHttp.Credentials = new NetworkCredential("imagupload", "123456");//ftp用户名和密码
            reqHttp.KeepAlive = false;
            reqHttp.Method = WebRequestMethods.Ftp.UploadFile;
            reqHttp.ContentLength = fileInf.Length;
            int buffLength = 2048;
            byte[] buff = new byte[buffLength];
            int contentLen;
            FileStream fs = fileInf.OpenRead();
            Stream strm = reqHttp.GetRequestStream();
            contentLen = fs.Read(buff, 0, buffLength);
            while (contentLen != 0)
            {
                strm.Write(buff, 0, contentLen);
                contentLen = fs.Read(buff, 0, buffLength);
            }
            strm.Close();
            fs.Close();
        }

         public static bool UploadFile(string localFilePath, string serverFolder,bool reName)
        {
            string fileNameExt, newFileName, uriString;
            if (reName)
            {
                fileNameExt = localFilePath.Substring(localFilePath.LastIndexOf(".") + 1);
                newFileName = DateTime.Now.ToString("yyMMddhhmmss") + fileNameExt;
            }
            else
            {
                newFileName = localFilePath.Substring(localFilePath.LastIndexOf("")+1);
            } 
            if (!serverFolder.EndsWith("/") && !serverFolder.EndsWith(""))
            {
                serverFolder = serverFolder + "/";
            }

            uriString = serverFolder + newFileName;   //服务器保存路径
            //// 创建WebClient实例
            WebClient myWebClient = new WebClient();
            myWebClient.Credentials = CredentialCache.DefaultCredentials;

            // 要上传的文件
            FileStream fs = new FileStream(newFileName, FileMode.Open, FileAccess.Read);
            BinaryReader r = new BinaryReader(fs);
            try
            {
                //使用UploadFile方法可以用下面的格式
                //myWebClient.UploadFile(uriString,"PUT",localFilePath);
                byte[] postArray = r.ReadBytes((int)fs.Length);
                Stream postStream = myWebClient.OpenWrite(uriString, "PUT");
                if (postStream.CanWrite)
                {
                    postStream.Write(postArray, 0, postArray.Length);
                }
                else
                {
                    MessageBox.Show("文件目前不可写！");
                }
                postStream.Close();
            }
            catch
            {
                //MessageBox.Show("文件上传失败，请稍候重试~");
                return false;
            }

            return true;
        }
        */
    }
}

目前，只实现了上传文件到本地，还不支持本地/局域网服务器 文件下载。