.net编程

开发平台：
C#

UploadStatus.cs：源码内容
							#region License
/*
* SunriseUpload - Asp.net Upload Component
*
* Copyright (C) 2004 mic <mic4free@hotmail.com>
*
* 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 Sunrise.Web.Upload
{
	/// <summary>
	/// Enum of upload state.
	/// </summary>
	public enum UploadState : byte
	{
		Error = 5,
		Completed = 4,
		Initializing = 0,
		Moving = 3,
		Uploaded = 2,
		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; }
		}
		public int FileCount
		{
			get { return this.fileCount; }
			set { this.fileCount = value; }
		}
		public long FileLength
		{
			get { return this.fileLength; }
			set { this.fileLength = value; }
		}
		public string FileName
		{
			get { return this.fileName; }
			set { this.fileName = value; }
		}
		public bool IsActive
		{
			get { return this.isActive; }
		}
		public TimeSpan LeftTime
		{
			get
			{
				TimeSpan span = TimeSpan.MaxValue;
				if ((this.fileLength - this.readLength) > 0)
				{
					span = new TimeSpan(0, 0, ((int) Math.Round((this.fileLength - this.readLength)/this.Speed, 0)));
				}
				return span;
			}
		}
		public int Percent
		{
			get
			{
				if (this.fileLength > 0)
				{
					this.percent = ((int) Math.Floor(((this.readLength*100)/this.fileLength)));
				}
				return this.percent;
			}
		}
		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;
			}
		}
		public UploadState State
		{
			get { return this.state; }
			set { this.state = value; }
		}
		#endregion
		#region Constructor
		/// <summary>
		/// 
		/// </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>
		/// 
		/// </summary>
		/// <param name="UploadID"></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;
			UploadStatus uploadStatus = ((UploadStatus) Utils.GetContext().Application[("_UploadGUID_" + UploadID)]);
			if (uploadStatus != null)
			{
				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;
			}
			this.isActive = (Utils.GetContext().Application[("_UploadGUID_" + UploadID)] != null);
		}
		#endregion
		/// <summary>
		/// Clear application variable.
		/// </summary>
		public void Dispose()
		{
			if (this.uploadID != string.Empty)
			{
				Utils.GetContext().Application.Remove(("_UploadGUID_" + this.uploadID));
			}
		}
		~UploadStatus()
		{
			if (this.uploadID != string.Empty)
			{
				Utils.GetContext().Application.Remove(("_UploadGUID_" + this.uploadID));
			}
		}
	}
}

						