winform中通过FileStream实现将文件上传

本实例实现功能：通过OpenFileDialog选择待上传的文件，并将所选文件的完整路径绑定到TreeView控间中显示，然后通过FolderBrowserDialog选择上传的文件路径，最后通过FileStream的方法将文件以二进制流的形式写入到所选路径的对应文件中。
其中：
trvFile为TreeView控间，显示待上传的文件；lablContent为Lable控间，显示待上传文件的信息和上传结果；btnSearch为Button控间，执行选择文件的功能；btnUpload为Button控间，执行文件上传的功能。
详细代码如下：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace WindowsApplication1
{
    public partial class FileUpLoad : Form
    {
        public FileUpLoad()
        {
            InitializeComponent();

            this.lablContent.Text = "附件名称：";
        }

        private void btnSearch_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();

            ofd.ShowDialog();

            //得到上传文件的完整名
            string loadFullName = ofd.FileName.ToString();

            //上传文件的文件名
            string loadName = loadFullName.Substring(loadFullName.LastIndexOf("//") + 1);

            //上传文件的类型
            string loadType = loadFullName.Substring(loadFullName.LastIndexOf(".") + 1);

            this.lablContent.Text += "/n"+loadFullName;

            AddFileToTreeView(loadFullName, loadName);
        }
       选择文件完成后的，用户界面如下图所示：

        ///

        /// 上传文件
        ///

        ///
        ///
        void btnUpload_Click(object sender, EventArgs e)
        {
            TreeNodeCollection tnNodeColl = trvFile.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.lablContent.Text = strCue;
            }
            else
            {
                MessageBox.Show("请选择要上传的文件！");
            }
        }
     上传地址选择界面，如下图所示：

上传成功界面，如下图所示：

        ///

        /// 将文件转换为二进制流进行读取
        ///

        /// 文件完整名
        /// 二进制流
        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;
            }
        }

        ///

        /// 将二进制流转换为对应的文件进行存储
        ///

        /// 接收的文件
        /// 二进制流
        /// 转换结果
        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;
        }

 
        ///

        /// 判断文件是否存在
        ///

        /// 文件完整的路径名
        /// 文件名
        /// 判断结果
        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;
            }

        }
   
        ///

        /// 为树菜单赋值，即待上传文件的完整名
        ///

        ///
        ///
        private void AddFileToTreeView(string fullName, string simpleName)
        {
            TreeNodeCollection nodeCollection = trvFile.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);
            }
        }

   }
}