简单的大视频截取播放功能代码,C#代码库,德仔网

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【C#】简单的大视频截取播放功能
作者:汶纡 / 发布于2016/8/26/ 760
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();  
            }  
        }  
    }  
}
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