基于文件格式的DataGrid多媒体播放示例(带表头自动排序,动态播放列表功能)

其大体思想就是实现在线音视频内容提供并动态生成播放列表,给大家在线观看(之前做这个的目的就是实现校园网内的资源共享...).

主要页面文件就只有两个:Default.aspx(动态文件列表),Play.aspx(播放或下载)

 项目源文件下载:https://files.cnblogs.com/flyye_cs/music.rar

运行界面如下:


由于写这个只是为了练习一下,所以加了很多注释,主要代码如下:

Default.aspx.cs

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Configuration;
using benSoft.web.WebControls.PopupBox;

namespace music
{
    /**//// <summary>
    /// _Default 的摘要说明。
    /// </summary>
    public class _Default : System.Web.UI.Page
    {
        protected System.Web.UI.HtmlControls.HtmlForm Form1;
        protected System.Web.UI.WebControls.Label allRow;
        protected System.Web.UI.WebControls.Label allPage;
        protected System.Web.UI.WebControls.Label nowPage;
        protected System.Web.UI.WebControls.Label sort;
        protected System.Web.UI.WebControls.TextBox txtSearch;
        protected System.Web.UI.WebControls.Button btnSearch;
        protected System.Web.UI.WebControls.Button btnAllFiles;
        protected System.Web.UI.WebControls.DataGrid dgMusic;
        
        protected PopupBox popBox;
    
        private void Page_Load(object sender, System.EventArgs e)
        {
            // 在此处放置用户代码以初始化页面
            if(!IsPostBack)
            {
                ViewState["SortOrder"]="加入日期 DESC"; //默认排序字段
                ViewState["SearchKey"]="*"; //默认搜索关键字为任意匹配
                dgMusic.PageSize=Int32.Parse(ConfigurationSettings.AppSettings["DisplayCount"]); //设置每页显示条数
                GetMedia("加入日期","DESC","*");
                nowPage.Text="1";

                //弹出信息框
                PopupMsg();
            }
        }        

        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {    
            this.btnSearch.Click += new System.EventHandler(this.btnSearch_Click);
            this.btnAllFiles.Click += new System.EventHandler(this.btnAllFiles_Click);
            this.dgMusic.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.dgMusic_PageIndexChanged);
            this.dgMusic.SortCommand += new System.Web.UI.WebControls.DataGridSortCommandEventHandler(this.dgMusic_SortCommand);
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion                        

        private void PopupMsg()
        {
            popBox.Focus = false;        
            popBox.Sound ="sound/default.wav";
            string strAbout=@"<b>基于文件模式的音视频点播系统<br><br><div align='center'>Powered By <a href='#' onclick="+"\"top.location='mailto:happy365d@163.com'\" title='联系我'>Flyye</a> 2005</div><div align='center'><br><a href='#' onclick="+"\"top.location='http://wpa.qq.com/msgrd?V=1&Uin=109317193&Site=flyye.3322.org&Menu=yes'\" title='有事请Ｑ我'>QQ:109317193</a></div></b>";
            if(ConfigurationSettings.AppSettings["MsgType"]=="1")
                popBox.Text = strAbout;
            else
            {
                if(Request.QueryString["CopyRight"]!=null)
                    popBox.Text=strAbout;
                else
                    popBox.Text = ConfigurationSettings.AppSettings["MsgText"];
            }
            popBox.CreatePopup();
        }

        private ArrayList GetFilesFromPaths(string searchFolder,string searchType,string searchValue)
        {            
            ArrayList myReturn=new ArrayList(); //返回文件集合            
            ArrayList myFolder=new ArrayList(); //多虚拟目录集合
            string[] strType; //多文件后缀集合
            string[] strTemp; //临时一维数组表            

            if(searchFolder.IndexOf("|")!=-1) //多目录
            {
                strTemp=searchFolder.Split(new char[]{'|'});
                myFolder.AddRange(strTemp);
            }
            else //单目录
            {
                myFolder.Add(searchFolder);
            }

            if(searchType.IndexOf("|")!=-1) //多文件类型
            {
                strTemp=searchType.Split(new char[]{'|'});
                strType=strTemp;                
            }
            else //单文件类型
            {
                strType=new string[]{searchType};
            }

            for(int k=0;k<myFolder.Count;k++) //遍历所有虚拟目录(动态增加)
            {
                string folder=Server.MapPath(myFolder[k].ToString()); //定位某一虚拟目录到物理路径                
                strTemp=Directory.GetDirectories(folder); //获取指定虚拟目录中的所有一级子目录列表
                if(strTemp.Length>0) //有子目录
                {
                    foreach(string s in strTemp)
                        myFolder.Add(myFolder[k]+s.Substring(s.LastIndexOf("\\")+1)+"/"); //添加到虚拟目录集合
                }
                strTemp=Directory.GetFiles(folder); //获取某一虚拟目录下所有文件的物理路径

                for(int i=0;i<strTemp.Length;i++) //逐一判断每个文件名的类型
                {
                    int iEnd=strTemp[i].LastIndexOf(".");
                    foreach(string s in strType) //遍历文件名后缀是否满足要求?
                    {
                        if(strTemp[i].Substring(iEnd+1).ToLower()==s) //后缀名存在,则查询特定名称(searchValue)的文件
                        {
                            if(searchValue=="*") //所有文件
                                myReturn.Add(strTemp[i]+"|"+myFolder[k]); //把满足要求的完整物理路径添加到一维数组中->"文件物理路径|虚拟目录"
                            else //文件名匹配查询
                            {
                                string temp=strTemp[i]; //要转换成小写的临时字符串,以便搜索英文名
                                if(temp.Substring(temp.LastIndexOf("\\")+1).ToLower().IndexOf(searchValue)!=-1) //如果找到匹配文件名
                                    myReturn.Add(strTemp[i]+"|"+myFolder[k]); //添加记录
                            }
                            break;
                        }
                    }
                }
            }            
            return myReturn; // 返回满足需求所有路径的集合
        }

        private void GetMedia(string strName,string strValue,string strSearch)
        {
            //获取满足需求的所有文件路径集合
            IEnumerator myFile = GetFilesFromPaths(ConfigurationSettings.AppSettings["MediaFolder"],ConfigurationSettings.AppSettings["MediaType"],strSearch).GetEnumerator();

            DataTable dt=new DataTable();            
            dt.Columns.Add(new DataColumn("媒体名称", typeof(String)));
            dt.Columns.Add(new DataColumn("媒体类型", typeof(String)));
            dt.Columns.Add(new DataColumn("加入日期", typeof(DateTime)));
            dt.Columns.Add(new DataColumn("在线播放", typeof(String)));
            dt.Columns.Add(new DataColumn("下载保存", typeof(String)));

            for(int i=0;i<dt.Columns.Count;i++)
            {
                if(dt.Columns[i].ColumnName==strName) //给排序字段加上图象提示
                {
                    if(strValue=="ASC")
                    {
                        strName=dt.Columns[i].ColumnName+" <img border='0' src='images/up.gif'>";
                        dt.Columns[i].ColumnName=strName;
                    }
                    else
                    {
                        if(strValue=="DESC")
                        {
                            strName=dt.Columns[i].ColumnName+=" <img border='0' src='images/down.gif'>";
                            dt.Columns[i].ColumnName=strName;
                        }
                    }
                    break;
                }
            }            

            DataRow dr;
            while( myFile.MoveNext() ) //逐个读取文件集合中的每个路径
            {
                string str=myFile.Current.ToString();
                string[] dir=str.Split(new char[]{'|'});

                int iStart=dir[0].LastIndexOf("\\");
                int iEnd=dir[0].LastIndexOf(".");
                if(iEnd!=-1)
                {
                    dr=dt.NewRow();                    
                    dr[0]=dir[0].Substring(iStart+1,iEnd-iStart-1);    
                    dr[1]=dir[0].Substring(iEnd).ToLower();
                    dr[2]=Directory.GetLastWriteTime(dir[0]);
                    dr[3]="<div align='center'><a title='在线播放："+dr[0]+"' href=\"Play.aspx?MediaPath="+dir[1]+dr[0]+dr[1]+"&Operation=Play\"><img border='0' src='images/play.gif'></a></div>";
                    dr[4]="<div align='center'><a title='下载："+dr[0]+"' href=\"Play.aspx?MediaPath="+dir[1]+dr[0]+dr[1]+"&Operation=DownLoad\"><img border='0' src='images/download.gif'></a></div>";
                    
                    dr[0]="<span title='"+dr[0]+"' class='flow1'>"+dr[0]+"</span>";
                    dr[1]="<span class='flow2'>"+dr[1]+"</span>";

                    dr[3]="<span class='flow2'>"+dr[3]+"</span>";
                    dr[4]="<span class='flow2'>"+dr[4]+"</span>";

                    dt.Rows.Add(dr);
                }
            }
            
            DataView dv = new DataView(dt);
            dv.Sort=strName+" "+strValue; //排序规则                        
            
            dgMusic.DataSource=dv;
            dgMusic.DataBind();        
            
            allRow.Text=dt.Rows.Count.ToString();
            allPage.Text=dgMusic.PageCount.ToString();
            sort.Text="<a title='点击各表头文字部分以重新排序'>已排序:"+strName+"</a>";
        }
        
        private void dgMusic_SortCommand(object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)
        {
            dgMusic.CurrentPageIndex=0;
            nowPage.Text="1";

            string strSort=e.SortExpression;
            if(strSort.IndexOf("<")!=-1)
                strSort=strSort.Substring(0,strSort.IndexOf("<")-1);
            
            if(ViewState["SortOrder"].ToString().EndsWith("DESC"))
            {
                ViewState["SortOrder"]=strSort+" ASC";
                GetMedia(strSort,"ASC",ViewState["SearchKey"].ToString());
            }
            else
            {
                if(ViewState["SortOrder"].ToString().EndsWith("ASC"))
                {
                    ViewState["SortOrder"]=strSort+" DESC";
                    GetMedia(strSort,"DESC",ViewState["SearchKey"].ToString());
                }
            }

        }

        private void dgMusic_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
        {
            dgMusic.CurrentPageIndex = e.NewPageIndex;
            nowPage.Text=Convert.ToString(e.NewPageIndex+1);            
            string[] str = ViewState["SortOrder"].ToString().Split(new char[]{' '});
            GetMedia(str[0],str[1],ViewState["SearchKey"].ToString());
        }

        private void btnSearch_Click(object sender, System.EventArgs e)
        {
            dgMusic.CurrentPageIndex=0;
            nowPage.Text="1";
            string[] str = ViewState["SortOrder"].ToString().Split(new char[]{' '});
            
            if(txtSearch.Text.Trim()=="")
                ViewState["SearchKey"]="*";
            else
                ViewState["SearchKey"]=txtSearch.Text.ToLower(); //转换成小写,以便搜索英文名

            GetMedia(str[0],str[1],ViewState["SearchKey"].ToString());
        }

        private void btnAllFiles_Click(object sender, System.EventArgs e)
        {
            dgMusic.CurrentPageIndex=0;
            nowPage.Text="1";
            txtSearch.Text="";
            string[] str = ViewState["SortOrder"].ToString().Split(new char[]{' '});

            ViewState["SearchKey"]="*";

            GetMedia(str[0],str[1],ViewState["SearchKey"].ToString());
        }    
    }
}

Play.aspx.cs

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Text; //Coding
using System.Configuration;
using System.Collections.Specialized;
using System.IO;

namespace music
{
    /**//// <summary>
    /// Play 的摘要说明。
    /// </summary>
    public class Play : System.Web.UI.Page
    {
        private void Page_Load(object sender, System.EventArgs e)
        {
            // 查询参数不能为空
            if(Request.QueryString["MediaPath"]!=null&&Request.QueryString["MediaPath"]!=string.Empty&&Request.QueryString["Operation"]!=null&&Request.QueryString["Operation"]!=string.Empty)
            {
                //判断文件是否存在,文件格式是否允许播放或提供下载
                DirectoryInfo file;
                try
                {
                    file=new DirectoryInfo(Server.MapPath(Request.QueryString["MediaPath"])); //防止访问恶意文件路径使程序出错
                }
                catch
                {
                    Response.Write("<script>window.alert('非法文件操作！！！');history.back();</script>");
                    return;
                }

                if(System.IO.File.Exists(file.FullName)) //文件存在
                {
                    string strType=file.FullName;                    
                    strType=strType.Substring(strType.LastIndexOf(".")+1);
                    string[] strTemp=ConfigurationSettings.AppSettings["MediaType"].Split(new char[]{'|'});

                    int i;
                    for(i=0;i<strTemp.Length;i++)
                    {
                        if(strType==strTemp[i])
                        {
                            i=-1; // -1 表示满足文件后缀名要求
                            break;
                        }
                    }
                    if(i!=-1) //文件后缀名不合法
                    {
                        Response.Write("<script>window.alert('您所请求的文件类型不允许操作！');history.back();</script>");
                        return;
                    }
                }
                else //不存在
                {
                    Response.Write("<script>window.alert('您所请求的文件不存在！');history.back();</script>");
                    return;
                }

                switch(Request.QueryString["Operation"])
                {
                    case "Play": //在线播放,动态生成单播列表.m3u
                        System.Web.HttpContext.Current.Response.Clear();
                        System.Web.HttpContext.Current.Response.ContentType = "audio/mpegurl"; //MIME中.m3u格式content-type为audio/mpegurl
                        string str="http://"+Request.ServerVariables["HTTP_HOST"]+Request.QueryString["MediaPath"];            
                        byte[] content=Coding(str,936); //简体中文的代码页是 936
                        System.Web.HttpContext.Current.Response.OutputStream.Write(content,0,content.Length);
                        System.Web.HttpContext.Current.Response.End();
                        break;
                    case "DownLoad": //下载媒体
                        string str2=Request.QueryString["MediaPath"].Substring(Request.QueryString["MediaPath"].LastIndexOf("/")+1);
                        System.Web.HttpContext.Current.Response.Clear();
                        System.Web.HttpContext.Current.Response.AppendHeader("content-disposition", "attachment; filename=\"" + System.Web.HttpUtility.UrlEncode(str2,System.Text.Encoding.UTF8) + "\"");
                        try
                        {
                            System.Web.HttpContext.Current.Response.WriteFile(file.FullName);
                        }
                        catch
                        {
                            Response.Write("对不起,该文件已被服务器占用,可能是服务器正在使用或下载它,请稍后再试！");
                        }
                        System.Web.HttpContext.Current.Response.End();
                        break;
                    default: //操作不存在
                        Response.Write("<script>window.alert('您所请求的操作无效！');history.back();</script>");
                        break;
                }                
            }
            else
                Response.Write("<script>window.alert('您所提交的参数无效！');history.back();</script>");            
        }

        public byte[] Coding(string str, int codePage)
        {
            Encoding targetEncoding;
            byte[] encodedChars;

            // Gets the encoding for the specified code page.
            targetEncoding = Encoding.GetEncoding(codePage);

            // Gets the byte representation of the specified string.
            encodedChars = targetEncoding.GetBytes(str);

            return encodedChars;            
        }

        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {    
            this.Load += new System.EventHandler(this.Page_Load);
        }
        #endregion
    }
}

如果在本机测试项目(music)的话,请按照web.config中的要求设置一下就OK了!