C# winform求助！

Question

在窗体中如何实现文件的上传下载？上传下载的相应文件都存储在某个磁盘里。
找了一些代码，可是无法实现，大家帮帮啊！急用！

Answer 1

是Winform 哪来的fileupload呢,
下载方法你可以选WebClient,上传你可以试试FTP上传下载
要在服务器端设置Ftp文件夹，要的我有源码

Answer 2

文件的上传  和下载  MSDN 下载中有这么一个源码例子。  我以前下来过。  楼主可以去下载 哪里看看

Answer 3

代码在msdn,还是自动脑好,看看msdn的System.IO和System.Net命名空间下相关的类也都有示例

Answer 4

类似于文件的复制功能吧，我最近刚做好的一个文件拷贝功能，仔细看下，会明白的，希望对你有用吧，不明白的地方在联系啊呵，代码如下：using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Windows.Forms.Design;
using System.IO;namespace CreateDirectory
{   
   
    public partial class OpenSave : Form
    {
        public string srcdir;
        public string desdir;        public OpenSave()
        {       
            InitializeComponent();
        }        private void Form2_Load(object sender, EventArgs e)
        {
         
        }        private void button1_Click(object sender, EventArgs e)
        {
    
            OpenFileDialog openFileDialog1 = new OpenFileDialog();
            openFileDialog1.Filter = "图片文件|*.bmp;*.jpg;*.jpeg;*.gif;*.png|*.doc|*.doc";        
            openFileDialog1.Title = "Select a file";          
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {     
                System.Diagnostics.Process.Start(openFileDialog1.FileName); 
             
            }        }        private void button2_Click(object sender, EventArgs e)
        {          
            SaveFileDialog saveFileDialog1 = new SaveFileDialog();
            saveFileDialog1.Filter = "JPeg Image|*.jpg|Bitmap Image|*.bmp|Gif Image|*.gif";
            saveFileDialog1.Title = "Save an Image File";
            saveFileDialog1.ShowDialog();            if (saveFileDialog1.FileName != "")
            {
                // Saves the Image via a FileStream created by the OpenFile method.
                System.IO.FileStream fs =(System.IO.FileStream)saveFileDialog1.OpenFile();
                // Saves the Image in the appropriate ImageFormat based upon the
                // File type selected in the dialog box.
                // NOTE that the FilterIndex property is one-based.
                switch (saveFileDialog1.FilterIndex)
                {
                    case 1:
                        {
                            //Form1 form1 = new Form1();
                            //form1.button1.Image.Save(fs,System.Drawing.Imaging.ImageFormat.Jpeg);
                         //form1.button1.Image.Save(fs, System.Drawing.ImageFormat.Jpeg);
                         //this.button2.Image.Save(fs,
                        // System.Drawing.Imaging.ImageFormat.Jpeg);
                        }
                        break;                    case 2:
                        this.button2.Image.Save(fs,
                           System.Drawing.Imaging.ImageFormat.Bmp);
                        break;                    case 3:
                        this.button2.Image.Save(fs,
                        System.Drawing.Imaging.ImageFormat.Gif);
                        break;
                }                fs.Close();
            }        }        private void button3_Click(object sender, EventArgs e)
        {
            CopyDirectory(srcdir, desdir);
        }        private void button4_Click(object sender, EventArgs e)
        {
            FolderDialog aa = new FolderDialog();
            aa.DisplayDialog();
            srcdir = aa.Path;
            //MessageBox.Show(aa.Path);                //OpenFileDialog srcfile = new OpenFileDialog();
            //srcfile.ShowDialog();
            //srcdir = srcfile.FileName;
 
        }        private void button5_Click(object sender, EventArgs e)
        {
            FolderDialog bb = new FolderDialog();
            bb.DisplayDialog();
            desdir = bb.Path;
        }        private void CopyDirectory(string srcdir, string desdir)
        {
            string folderName = srcdir.Substring(srcdir.LastIndexOf("\\") + 1);            string desfolderdir = desdir + "\\" + folderName;            if (desdir.LastIndexOf("\\") == (desdir.Length - 1))
            {
                desfolderdir = desdir + folderName;
            }
            string[] filenames = Directory.GetFileSystemEntries(srcdir);            foreach (string file in filenames)// 遍历所有的文件和目录
            {
                if (Directory.Exists(file))// 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件
                {                    string currentdir = desfolderdir + "\\" + file.Substring(file.LastIndexOf("\\") + 1);
                    if (!Directory.Exists(currentdir))
                    {
                        Directory.CreateDirectory(currentdir);
                    }                    CopyDirectory(file, desfolderdir);
                }                else // 否则直接copy文件
                {
                    string srcfileName = file.Substring(file.LastIndexOf("\\") + 1);                    srcfileName = desfolderdir + "\\" + srcfileName;
                    if (!Directory.Exists(desfolderdir))
                    {
                        Directory.CreateDirectory(desfolderdir);
                    }
                    File.Copy(file, srcfileName);
                }
            }
        }
    }
    class FolderDialog : FolderNameEditor
     {
        FolderBrowser fDialog = new FolderBrowser();
        public FolderDialog()
        {
        }
        public DialogResult DisplayDialog()
         {
             return DisplayDialog("确定你的文件夹路径！！");
         }
        public DialogResult DisplayDialog(string description)
        {
           fDialog.Description = description;
             return fDialog.ShowDialog();
         }
         public string Path
         {
             get
             {
                 return fDialog.DirectoryPath;
            }
        }
        ~FolderDialog()
         {
            fDialog.Dispose();
        }
 
    }}

Answer 5

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;namespace FileUpLoad
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();            this.lblContext.Text = "附件名称：";
        }        private void btnSearch_Click(object sender, EventArgs e)
        {
            OpenFileDialog openfd = new OpenFileDialog();            openfd.ShowDialog();            string uploadName = openfd.FileName;            string loadName = uploadName.Substring(uploadName.LastIndexOf("\\") + 1);            string loadType = uploadName.Substring(uploadName.LastIndexOf(".") + 1);            this.lblContext.Text += "\n" + uploadName;            AddFileToTreeView(uploadName, loadName);        }        private void AddFileToTreeView(string fullName, string simpleName)
        {
            TreeNodeCollection nodeCollection = treeFile.Nodes;            TreeNode node = new TreeNode();            node.Text = fullName;            node.ToolTipText = simpleName;            node.Checked = true;            nodeCollection.Add(node);            if (nodeCollection.Count == 1)
            {
                Button btnUpload = new Button();                btnUpload.Text = "上传";                btnUpload.Click += new EventHandler(btnUpload_Click);                panel1.Controls.Add(btnUpload);            }
        }        void btnUpload_Click(object sender, EventArgs e)
        {
            TreeNodeCollection tnNodeColl = treeFile.Nodes;            int nodeCount = tnNodeColl.Count;            int successCount = 0;            if (nodeCount > 0)
            {
                //
                //选择保存文件的路径
                //
                folderBrowserDialog1.ShowDialog();                string loadPath = folderBrowserDialog1.SelectedPath;                string nodeText = string.Empty;                string nodeTipText = string.Empty;                foreach (TreeNode node in tnNodeColl)
                {
                    if (node.Checked)
                    {
                        nodeText = node.Text.ToString();                        nodeTipText = node.ToolTipText;                        string loadFile = loadPath + "\\" + nodeTipText;                        bool isExists = JudgeFileExists(loadFile, nodeTipText);                        if (isExists)
                        {
                            byte[] btFile = FileToBinary(nodeText); if (BinaryToFile(loadFile, btFile))
                            {
                                node.Checked = false;                                successCount++;                                continue;
                            }
                            else
                            {
                                break;
                            }
                        }
                        else
                        {
                            continue;
                        }
                    }
                    else
                    {
                        continue;
                    }
                }                string strCue = "成功上传" + successCount.ToString() + "个文件。\n";                int failCount = nodeCount - successCount;                strCue += "上传失败" + failCount.ToString() + "个文件。\n";                this.lblContext.Text = strCue;
            }
            else
            {
                MessageBox.Show("请选择要上传的文件！");
            }
        }        private bool JudgeFileExists(string fileName, string nodeTipText)
        {
            if (File.Exists(fileName))
            {
                StringBuilder sbError = new StringBuilder();
                sbError.Append(nodeTipText + "已存在于：\n");                sbError.Append(fileName.Substring(0, fileName.LastIndexOf("\\")) + "\n");                sbError.Append("中，是否覆盖原文件？");
                string strSearch = MessageBox.Show(sbError.ToString(), "提示", MessageBoxButtons.YesNo).ToString();                if (strSearch == "Yes")
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
            else
            {
                return true;
            }        }        private byte[] FileToBinary(string fileName)
        {
            try
            {
                FileStream fsRead = new FileStream(fileName, FileMode.Open, FileAccess.Read);
                if (fsRead.CanRead)
                {
                    int fsSize = Convert.ToInt32(fsRead.Length);                    byte[] btRead = new byte[fsSize];                    fsRead.Read(btRead, 0, fsSize);                    return btRead;
                }
                else
                {
                    MessageBox.Show("文件读取错误！");
                    return null;
                }
            }
            catch (Exception ce)
            {
                MessageBox.Show(ce.Message);                return null;
            }
        }        private bool BinaryToFile(string fileName, byte[] btBinary)
        {
            bool result = false;            try
            {
                FileStream fsWrite = new FileStream(fileName, FileMode.Create, FileAccess.Write);                if (fsWrite.CanWrite)
                {
                    fsWrite.Write(btBinary, 0, btBinary.Length);                    MessageBox.Show("文件写入成功！");                    result = true;
                }
                else
                {
                    MessageBox.Show("文件些入错误！");
                    result = false;
                }
            }
            catch (Exception ce)
            {
                MessageBox.Show(ce.Message);
                result = false;
            }            return result;
        }    }
}

Answer 6

namespace FileUpLoad
{
    partial class Form1
    {
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }        #region Windows 窗体设计器生成的代码        /// <summary>
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.btnSearch = new System.Windows.Forms.Button();
            this.lblContext = new System.Windows.Forms.Label();
            this.treeFile = new System.Windows.Forms.TreeView();
            this.panel1 = new System.Windows.Forms.Panel();
            this.folderBrowserDialog1 = new System.Windows.Forms.FolderBrowserDialog();
            this.SuspendLayout();
            // 
            // btnSearch
            // 
            this.btnSearch.Location = new System.Drawing.Point(374, 208);
            this.btnSearch.Name = "btnSearch";
            this.btnSearch.Size = new System.Drawing.Size(108, 23);
            this.btnSearch.TabIndex = 0;
            this.btnSearch.Text = "选择上传文件";
            this.btnSearch.UseVisualStyleBackColor = true;
            this.btnSearch.Click += new System.EventHandler(this.btnSearch_Click);
            // 
            // lblContext
            // 
            this.lblContext.AutoSize = true;
            this.lblContext.ForeColor = System.Drawing.Color.Red;
            this.lblContext.Location = new System.Drawing.Point(12, 251);
            this.lblContext.Name = "lblContext";
            this.lblContext.Size = new System.Drawing.Size(0, 12);
            this.lblContext.TabIndex = 3;
            // 
            // treeFile
            // 
            this.treeFile.Location = new System.Drawing.Point(12, 12);
            this.treeFile.Name = "treeFile";
            this.treeFile.Size = new System.Drawing.Size(575, 188);
            this.treeFile.TabIndex = 4;
            // 
            // panel1
            // 
            this.panel1.Location = new System.Drawing.Point(503, 208);
            this.panel1.Name = "panel1";
            this.panel1.Size = new System.Drawing.Size(84, 21);
            this.panel1.TabIndex = 5;
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(599, 445);
            this.Controls.Add(this.lblContext);
            this.Controls.Add(this.panel1);
            this.Controls.Add(this.treeFile);
            this.Controls.Add(this.btnSearch);
            this.Name = "Form1";
            this.Text = "FileUpload";
            this.ResumeLayout(false);
            this.PerformLayout();        }        #endregion        private System.Windows.Forms.Button btnSearch;
        private System.Windows.Forms.Label lblContext;
        private System.Windows.Forms.TreeView treeFile;
        private System.Windows.Forms.Panel panel1;
        private System.Windows.Forms.FolderBrowserDialog folderBrowserDialog1;
    }
}