多份文件上传效果

实现功能（暂无实现文件上传到数据库，只实现界面上传效果）：

       上传文件名称展示，上传文件名称展示， 上传进度展示，上传速度展示，单个取消操作，全部取消操作；

界面展示

1，设置时间触发器

        /// <summary>
        /// 时间事件触发文件上传
        /// </summary>
        private void TimeEvents()
        {
            System.Timers.Timer timer = new System.Timers.Timer();
            timer.Enabled = true;
            timer.Interval = 1000; //执行间隔时间,单位为毫秒; 
            timer.Start();
            timer.Elapsed += new System.Timers.ElapsedEventHandler(UpdateFileEvent);
        }

        private void UpdateFileEvent(object sender, System.Timers.ElapsedEventArgs e)
        {
            if (this.datUpdateFile.Rows.Count == 0)
            {
                return;
            }
            GC.Collect();
            for (int i = 0; i < this.datUpdateFile.Rows.Count; i++)
            {
                if (this.datUpdateFile.Rows[i].Cells[2].Value == null || this.datUpdateFile.Rows[i].Cells[2].Value.ToString() != "0%")
                {
                    continue;
                }
                if (this.datUpdateFile.Rows[i].Cells[2].Value.ToString() == "0%")
                {
                    if (uploadCompletedList.Count >= 3 || uploadCompletList.Contains(this.datUpdateFile.Rows[i].Cells[1].Value.ToString()))
                    {
                        return;
                    }
                    Console.WriteLine(uploadCompletedList.Count);
                    UpdateFile(i.ToString());
                }
            }
        }

　2，在DataGridView中展示需要显示的文件信息

        /// <summary>
        /// 选择文件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {

            OpenFileDialog openFileDialog1 = new OpenFileDialog();
            openFileDialog1.InitialDirectory = "C:";
            openFileDialog1.Filter = "所有文件 (*.*)|*.*";
            openFileDialog1.Multiselect = true;
            openFileDialog1.FilterIndex = 1;
            openFileDialog1.RestoreDirectory = true;
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                if (this.datUpdateFile.Rows.Count == 0)//上传全部取消后，fileNameList和uploadCompletList需要清空
                {
                    fileNameList.Clear();
                    uploadCompletList.Clear();
                }
                foreach (var fileName in openFileDialog1.FileNames)
                {
                    if (fileNameList.Count != 0 && fileNameList.Contains(fileName.Split('\').LastOrDefault()))
                    {
                        continue;
                    }
                    fileNameList.Add(fileName.Split('\').LastOrDefault());
                    additem(fileName, fileName.Split('\').LastOrDefault(), "0%", "上传准备中...", "取消");
                }
            }
        }
        /// <summary>
        /// 显示DataGridView一行内容
        /// </summary>
        /// <param name="fullFileName">文件全路径</param>
        /// <param name="fileName">文件名</param>
        /// <param name="colSpeedProgress">进度</param>
        /// <param name="colSpeed">速度</param>
        /// <param name="colOperation">操作</param>
        public void additem(string fullFileName, string fileName, string colSpeedProgress, string colSpeed, string colOperation)
        {
            DataGridViewRow dgvr = new DataGridViewRow();
            foreach (DataGridViewColumn c in this.datUpdateFile.Columns)
            {
                dgvr.Cells.Add(c.CellTemplate.Clone() as DataGridViewCell);
            }
            dgvr.Cells[0].Value = fullFileName;
            dgvr.Cells[1].Value = fileName;
            dgvr.Cells[2].Value = colSpeedProgress;
            dgvr.Cells[3].Value = colSpeed;
            dgvr.Cells[4].Value = colOperation;
            this.datUpdateFile.Rows.Add(dgvr);
        }

3，上传文件逻辑

        /// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="num"></param>
        private void UpdateFile(object num)
        {
            if (this.datUpdateFile.RowCount == 0)
            {
                Thread.ResetAbort();
                return;
            }
            //var basePath = System.AppDomain.CurrentDomain.BaseDirectory;
            //var allFilePath = basePath + "\fileDic";
            //if (!Directory.Exists(allFilePath))
            //{
            //    Directory.CreateDirectory(allFilePath);
            //}
            //string buttonText = this.datUpdateFile.Rows[index].Cells[1].Value.ToString();//获取文件后缀
            //string fileName = DateTime.Now.ToString("yyyyMMddHHmmss.") + buttonText.Split('.').LastOrDefault();//重置文件名称
            //var filePath = allFilePath + "\" + fileName;
            int index = int.Parse(num.ToString());
            string allFilePathOld = this.datUpdateFile.Rows[index].Cells[0].Value.ToString();//获取文件后缀

            uploadCompletedList.Add(this.datUpdateFile.Rows[index].Cells[1].Value.ToString());
            try
            {
                // 要上传的文件  
                FileStream fs = new FileStream(allFilePathOld, FileMode.Open, FileAccess.Read);

                BinaryReader r = new BinaryReader(fs);
                long length = fs.Length;
                //每次上传4k  
                int bufferLength = 4096;
                byte[] buffer = new byte[bufferLength];
                //已上传的字节数  
                long offset = 0;
                int size = r.Read(buffer, 0, bufferLength);
                DateTime startTimeEd = startTime;
                while (size > 0)
                {
                    offset += size;
                    DateTime startTimeNow = DateTime.Now;
                    TimeSpan span = DateTime.Now - startTimeEd;
                    double second = span.TotalSeconds;
                    try
                    {
                        if (second > 0.001)
                        {
                            this.datUpdateFile.Rows[index].Cells[3].Value = (size / 1024 / second).ToString("0.00") + "KB/秒";
                        }
                        this.datUpdateFile.Rows[index].Cells[2].Value = (offset * 100.0 / length).ToString("F2") + "%";
                    }
                    catch (Exception)
                    {
                        return;
                    }

                    Application.DoEvents();

                    startTimeEd = startTimeNow;

                    #region 判断是否超时或者弱网
                    if ((DateTime.Now - startTimeNow).TotalSeconds >= 60)
                    {
                        try
                        {
                            this.datUpdateFile.Rows[index].Cells[2].Value = "上传数据超时，请重试";
                        }
                        catch (Exception)
                        {
                        }
                        return;

                    }
                    if ((DateTime.Now - startTimeNow).TotalSeconds >= 30 && (DateTime.Now - startTimeNow).TotalSeconds <= 60)
                    {
                        MessageBox.Show("网速为弱网，请耐心等待！");
                    }
                    #endregion
                    size = r.Read(buffer, 0, bufferLength);
                }
                r.Close();
                try
                {
                    uploadCompletedList.Remove(this.datUpdateFile.Rows[index].Cells[1].Value.ToString());
                    uploadCompletList.Add(this.datUpdateFile.Rows[index].Cells[1].Value.ToString());
                }
                catch (Exception)
                {
                    return;
                }

            }
            catch (Exception ex)
            {
                MessageBox.Show("上传失败，请重新上传");
                return;
            }
        }

4，取消操作

        /// <summary>
        /// 选中一行中button按钮
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void datUpdateFile_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
        {
            if (e.RowIndex >= 0 && e.ColumnIndex == 4)
            {
                string buttonText = this.datUpdateFile.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString();
                Console.WriteLine(buttonText);
                string contextValue = this.datUpdateFile.Rows[e.RowIndex].Cells[2].Value.ToString();
                if (!(contextValue == "0%" || contextValue == "100.00%"))
                {
                    return;
                }
                fileNameList.Remove(this.datUpdateFile.Rows[e.RowIndex].Cells[1].Value.ToString());
                this.datUpdateFile.Rows.RemoveAt(e.RowIndex);
            }
        }

 PS:如有BUG请见谅；