做一个简单的大视频截取播放功能

index.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="index.aspx.cs" Inherits="WebApplication1.index" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
            <object align="middle" classid="CLSID:22d6f312-b0f6-11d0-94ab-0080c74c7e95" class="OBJECT"
            id="MediaPlayer1">
            <param name="ShowStatusBar" value="-1">
            <param name="Filename" value='Default.aspx?file=D:\1.wmv'>
            <embed type='application/x-oleobject' codebase='http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=5,1,52,701'
                flename='mp' src='Default.aspx?file=D:\1.wmv'></object>
                
                
    </div>
    
    </form>
</body>
</html>

Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    </div>
    </form>
</body>
</html>

Default.aspx.cs

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

namespace WebApplication1
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            WriteFile(Request.QueryString["file"]);
        }
        public void WriteFile(string filepath)
        {
            System.IO.Stream iStream = null;

            //缓冲区读取10K字节块
            byte[] buffer = new Byte[10240];

            //该文件的长度：
            int length;

            //总字节数为
            long dataToRead;

            // 识别下载，包括其路径中的文件。
            //string filepath  = @"E:\software\SQL Server 2000 Personal Edition.ISO";
            // 识别的文件名。
            //string  filename  = System.IO.Path.GetFileName(filepath);

            try
            {
                ///打开文件。
                iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,
                System.IO.FileAccess.Read, System.IO.FileShare.Read);

                // 总字节数为
                dataToRead = iStream.Length;

                long p = 0;
                if (Request.Headers["Range"] != null)
                {
                    Response.StatusCode = 206;
                    p = long.Parse(Request.Headers["Range"].Replace("bytes=", "").Replace("-", ""));
                }
                if (p != 0)
                {
                    Response.AddHeader("Content-Range", "bytes " + p.ToString() + "-" + ((long)(dataToRead - 1)).ToString() + "/" + dataToRead.ToString());
                }
                Response.AddHeader("Content-Length", ((long)(dataToRead - p)).ToString());
                iStream.Position = p;
                dataToRead = dataToRead - p;
                // 读取的字节数
                while (dataToRead > 0)
                {
                    // 验证客户端连接。
                    if (Response.IsClientConnected)
                    {
                        // 读入缓冲区中的数据
                        length = iStream.Read(buffer, 0, 10240);

                        // 写数据到当前输出流
                        Response.OutputStream.Write(buffer, 0, length);

                        // 刷新数据到HTML输出
                        Response.Flush();

                        buffer = new Byte[10240];
                        dataToRead = dataToRead - length;
                    }
                    else
                    {
                        //prevent infinite loop if user disconnects
                        dataToRead = -1;
                    }
                }
            }
            catch (Exception ex)
            {
                // Trap the error, if any.
                Response.Write("Error : " + ex.Message);
            }
            finally
            {
                if (iStream != null)
                {
                    //Close the file.
                    iStream.Close();
                }
                Response.End();
            }
        }
    }
}

做一个简单的大视频截取播放功能

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