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   源码介绍

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可用于大文件上传 以及 需长时间执行的任务，可反馈出任务执行进度，如下图

#region Copyright © 2010-2011 Craig P Johnson [craigpj@gmail.com]
/*
 * This software is provided 'as-is', without any express or implied warranty.
 * In no event will the author(s) be held liable for any damages arising from
 * the use of this software.
 * 
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 * 
 *   1. The origin of this software must not be misrepresented; you must not
 *      claim that you wrote the original software. If you use this software
 *      in a product, an acknowledgment in the product documentation would be
 *      appreciated but is not required.
 * 
 *   2. Altered source versions must be plainly marked as such, and must not
 *      be misrepresented as being the original software.
 * 
 *   3. This notice may not be removed or altered from any source distribution.
 */
#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace AsyncProcessor
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                ButtonStartAsynchProcess.Visible = true;
                PanelProcessMonitor.Visible = false;
            }

            // add event handlers to execute after the process is complete
            asyncProcessingMonitor1.ProcessingComplete  = new EventHandler(ProcessingComplete);
            asyncProcessingMonitor1.ProcessingError  = new EventHandler(ProcessingError);
        }

        protected void ButtonStartAsynchProcess_Click(object sender, EventArgs e)
        {
            StartAsynchProcess();
            PanelProcessMonitor.Visible = true;
        }

        private void StartAsynchProcess()
        {
            // generate a sudo random number for this process
            // I suggest adding the process to a database and using teh unique id
            // generated. that way you have a record of the process running
            int seed = int.Parse(DateTime.Now.Ticks.ToString().Substring(0, 9));
            int unique_proc_id = new Random(seed).Next();

            // create a new AsyncProcessorDetail
            AsyncProcessorDetail detail = new AsyncProcessorDetail(unique_proc_id, "c:\\path\\to\\your\\file", "filename", 0, "ProcessorExample", 1);

            // call the AsyncProcessManager and pass it the AsyncProcessorDetail to be processed
            AsyncProcessManager.StartAsyncProcess(detail);

            // start the asyncProcessingMonitor control
            asyncProcessingMonitor1.Start(unique_proc_id, true, "Default.aspx");
        }

        protected void ProcessingComplete(object sender, EventArgs e)
        {
            // execute any code here on processing complete
        }

        protected void ProcessingError(object sender, EventArgs e)
        {
            // display an error warning to your users
        }
    }
}