多媒体播放器

				using System;
				using System.Data;
				using System.Configuration;
				using System.Collections;
				using System.Web;
				using System.Web.Security;
				using System.Web.UI;
				using System.Web.UI.WebControls;
				using System.Web.UI.WebControls.WebParts;
				using System.Web.UI.HtmlControls;
				using System.Text;
				
				public partial class xPlayer : System.Web.UI.UserControl, System.Web.UI.ICallbackEventHandler 
				{
				    protected string returnValue = "default";
				    public string sCallBackFunctionInvocation;
				
				    protected void Page_Load(object sender, EventArgs e)
				    {
				        sCallBackFunctionInvocation = this.Page.ClientScript.GetCallbackEventReference(this, "message", "showClipDetail", "context", "OnError", false);
				    }
				
				
				    public void RaiseCallbackEvent(String eventArgument)
				    {
				        DataSet dsClipDetail = this.getClipDetailFromDB(eventArgument);
				        StringBuilder strDivHTML = new StringBuilder();
				
				        if (dsClipDetail.Tables[0].Rows.Count > 0)
				        {
				            strDivHTML.Append("");
				            strDivHTML.Append("");
				            strDivHTML.Append("");
				            strDivHTML.Append(string.Format("Details: {0}", dsClipDetail.Tables[0].Rows[0]["details"].ToString()));
				            strDivHTML.Append("");
				            strDivHTML.Append("");
				            strDivHTML.Append("");
				        }
				        else
				            strDivHTML.Append("details not available for media.");
				
				        returnValue = strDivHTML.ToString();
				    }
				
				    public string GetCallbackResult()
				    {
				        return returnValue;
				    }
				
				    protected DataSet getClipDetailFromDB(string ID)
				    {
				        DataSet tmpDs = new DataSet();
				        DataSet tmpDsVid = new DataSet();
				
				        tmpDsVid.Tables.Add("MediaByID");
				        tmpDsVid.Tables[0].Columns.Add("id");
				        tmpDsVid.Tables[0].Columns.Add("path");
				        tmpDsVid.Tables[0].Columns.Add("details");
				
				        try
				        {
				            tmpDs.ReadXml(Server.MapPath("~/xLitePlayer_data/xMediaPaths.xml"));
				
				            tmpDsVid = tmpDs.Clone();
				
				            for (int i = 0; i < tmpDs.Tables[0].Rows.Count; i++)
				            {
				                if (tmpDs.Tables[0].Rows[i]["id"].ToString() == ID)
				                {
				                    DataRow dr = tmpDsVid.Tables[0].NewRow();
				
				                    dr["details"] = tmpDs.Tables[0].Rows[i]["details"].ToString();
				
				                    tmpDsVid.Tables[0].Rows.Add(dr);
				
				                    break;
				                }
				            }
				
				        }
				        catch (Exception)
				        {
				            //TODO throw error;   
				        }
				
				        return tmpDsVid;
				    }
				}