uploadstatus.cs

上传的控件

#region License

/*
* SunriseUpload - Asp.net Upload Component
*
* Copyright (C) 2004 mic <[e-mail]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*
* In case your copy of SunriseUpload does not include a copy of the license, you may find it online at 
* http://www.gnu.org/copyleft/gpl.html
*
* You can find new release of this component at http://athena.9966.org/SunriseUpload .
*/

#endregion

using System;

namespace WUSGControl.Web.Upload
{
	/// <summary>
	/// Enum of upload state.
	/// </summary>
	public enum UploadState : byte
	{
        //错误
		Error = 5,
        //完成
		Completed = 4,
        //初始化
		Initializing = 0,
        //移动中,当上传文件是保存在文件夹中时,先保存在临时文件夹中的,等全部上传完成后
        //移动到目标文件夹中
		Moving = 3,
        //已经上传
		Uploaded = 2,
        //正在上传
		Uploading = 1
	}

	public class UploadStatus : IDisposable
	{
		#region Fields

		private DateTime beginTime;
		private int fileCount;
		private long fileLength;
		private string fileName;
		private bool isActive;
		private int percent;
		private long readLength;
		private string uploadID;
		private UploadState state;
		#endregion

		#region Properties

		internal DateTime BeginTime
		{
			get { return this.beginTime; }
		}
        /// <summary>
        /// 待查？
        /// </summary>
		public int FileCount
		{
			get { return this.fileCount; }
			set { this.fileCount = value; }
		}
        /// <summary>
        /// 文件长度,就是文件的二进制字节长度
        /// </summary>
		public long FileLength
		{
			get { return this.fileLength; }
			set { this.fileLength = value; }
		}
        /// <summary>
        /// 文件名字
        /// </summary>
		public string FileName
		{
			get { return this.fileName; }
			set { this.fileName = value; }
		}
        /// <summary>
        /// 是否是激活状态,Application[("_UploadGUID_" + UploadID)]为空时则为活动停止
        /// </summary>
		public bool IsActive
		{
			get { return this.isActive; }
		}
        /// <summary>
        /// 还有多少时间没有传完
        /// </summary>
		public TimeSpan LeftTime
		{
			get
			{
				TimeSpan span = TimeSpan.MaxValue;
				if ((this.fileLength - this.readLength) > 0)
				{
					//返回总秒数
					span = new TimeSpan(0, 0, ((int) Math.Round((this.fileLength - this.readLength)/this.Speed, 0)));
				}

				return span;
			}
		}
        /// <summary>
        /// 完成百分比
        /// </summary>
		public int Percent
		{
			get
			{
				if (this.fileLength > 0)
				{
					this.percent = ((int) Math.Floor((double)((this.readLength*100)/this.fileLength)));
				}

				return this.percent;
			}
		}
        /// <summary>
        /// 已读和接收字节的长度
        /// </summary>
		public long ReceivedLength
		{
			get { return this.readLength; }
			set
			{
				this.readLength = value;
				if (this.readLength < this.fileLength)
				{
					this.state = UploadState.Uploading;
				}
			}
		}

		public double Speed
		{
			get
			{
				TimeSpan span = DateTime.Now.Subtract(this.beginTime);
				double totalSeconds = span.TotalSeconds;
				double speed = 0;

				if ((totalSeconds == 0) && (this.readLength == this.fileLength))
				{
					totalSeconds = 1;
				}
				if (totalSeconds > 0)
				{
					speed = Math.Round(this.readLength/totalSeconds, 2);
				}

				return speed;
			}
		}
        /// <summary>
        /// 上传的状态,是UploadState枚举类型
        /// </summary>
		public UploadState State
		{
			get { return this.state; }
			set { this.state = value; }
		}

		#endregion

		#region Constructor

		/// <summary>
		/// 无参构造
		/// </summary>
		internal UploadStatus()
		{
			this.fileLength = 0;
			this.readLength = 0;
			this.state = UploadState.Initializing;
			this.percent = 0;
			this.beginTime = DateTime.MinValue;
			this.isActive = true;
			this.uploadID = string.Empty;
			this.fileName = string.Empty;
			this.fileCount = 0;
			this.beginTime = DateTime.Now;
		}

		/// <summary>
		/// 查找型构造方法
		/// </summary>
		/// <param name="UploadID">文件上传ID，产生方式为：  格式为：</param>
		public UploadStatus(string UploadID)
		{
			this.fileLength = 0;
			this.readLength = 0;
			this.state = UploadState.Initializing;
			this.percent = 0;
			this.beginTime = DateTime.MinValue;
			this.isActive = true;
			this.uploadID = string.Empty;
			this.fileName = string.Empty;
			this.fileCount = 0;
			this.uploadID = UploadID;
			//在全局中找状态.产生方式：　　格式为：
            //if (System.Web.HttpContext.Current != null)
            //{
                UploadStatus uploadStatus = ((UploadStatus)System.Web.HttpContext.Current.Application[("_UploadGUID_" + UploadID)]);
                //Utils.2writem("UploadStatus 在初始化时:" + ("_UploadGUID_" + UploadID));
                if (uploadStatus != null)
                {
                    //Utils.2writem("初始化时在Application中找到历史状态对象!");
                    this.fileLength = uploadStatus.FileLength;
                    this.readLength = uploadStatus.ReceivedLength;
                    this.percent = uploadStatus.Percent;
                    this.state = uploadStatus.State;
                    this.beginTime = uploadStatus.BeginTime;
                    this.fileName = uploadStatus.FileName;
                    this.fileCount = uploadStatus.FileCount;//第几个文件的意思，一般多文件上传有这个属性
                }

                this.isActive = (System.Web.HttpContext.Current.Application[("_UploadGUID_" + UploadID)] != null);
            //}

            //this.isActive = false;
			
		}

		#endregion

		/// <summary>
		/// Clear application variable.
		/// </summary>
		public void Dispose()
		{
			if (this.uploadID != string.Empty&&Utils.GetContext() != null)
			{
                Utils.GetContext().Application.Remove(("_UploadGUID_" + this.uploadID));
			}
		}

        /// <summary>
        /// 生新定义了对象的析构方法
        /// </summary>
		~UploadStatus()
		{
			if (this.uploadID != string.Empty&&Utils.GetContext() != null)
			{
                Utils.GetContext().Application.Remove(("_UploadGUID_" + this.uploadID));
			}
		}
	}

}