/// <summary>
/// 结构转换成XML
/// </summary>
/// <param name="playlist">播放列表</param>
/// <returns></returns>
public string ToXml(AMS_PlayListMd5 playlist)
{
//TODO:转换成xml结构的算法
//创建一个xml对象
XmlDocument xmlDoc = new XmlDocument();
//创建开头
XmlDeclaration dec = xmlDoc.CreateXmlDeclaration("1.0", "utf-8", null);
xmlDoc.AppendChild(dec);
//创建根节点
XmlElement root = xmlDoc.CreateElement("Root");
root.SetAttribute("Num", playlist.PlayListNo);
root.SetAttribute("EffectDate", playlist.EffectDate.ToShortDateString());
root.SetAttribute("EndDate", playlist.EndDate.ToShortDateString());
root.SetAttribute("PlayElapsed", playlist.PlayElapsed.ToString());
//创建二级节点
XmlElement SecNode = xmlDoc.CreateElement("VideoItems");
root.AppendChild(SecNode);
//遍历媒体文件并添加到节点中
foreach (AMS_VideoMd5Item video in playlist.PlayVideoItems)
{
XmlElement ThirdNode = xmlDoc.CreateElement("Video");
ThirdNode.SetAttribute("name", video.Name);
ThirdNode.SetAttribute("playtime", video.PlayTime);
ThirdNode.SetAttribute("source", video.RelativeUrl);
ThirdNode.SetAttribute("md5value", video.md5Value);
SecNode.AppendChild(ThirdNode);
//不重复的视频文件名称
int i;
for (i = 0; i < VideoFiles.Count; i++)
{
if (VideoFiles[i].Name == video.Name)
{
break;
}
}
if (i >= VideoFiles.Count)
{
VideoFiles.Add(video);
}
}
//在根节点中添加二级节点
root.AppendChild(SecNode);
//添加根节点
xmlDoc.AppendChild(root);
return(xmlDoc.OuterXml);
}
/// <summary>
/// 播放列表xml 转换成对象
/// </summary>
/// <param name="xmlPlayList">xml结构的播放列表</param>
/// <returns></returns>
public static AMS_PlayListMd5 Parse(string xmlPlayList)
{
AMS_PlayListMd5 plm = new AMS_PlayListMd5();
XmlDocument xmlDoc = new XmlDocument();
try
{
//载入字符串类型的XML
xmlDoc.LoadXml(xmlPlayList);
plm = Parse(xmlDoc);
}
catch (Exception ex)
{
throw ex;
}
return(plm);
}
/// <summary>
/// 播放列表xml 转换成对象
/// </summary>
/// <param name="xmlPlayList">xml结构的播放列表</param>
/// <returns></returns>
private static AMS_PlayListMd5 Parse(XmlDocument xmlPlayList)
{
AMS_PlayListMd5 plm = new AMS_PlayListMd5();
List <AMS_VideoMd5Item> videoFiles = new List <AMS_VideoMd5Item>();
XmlDocument xmlDoc = xmlPlayList;
try
{
//查找根节点
XmlNode node = xmlDoc.SelectSingleNode("//Root");
plm.PlayListNo = node.Attributes["Num"].Value; //列表编号
plm.EffectDate = DateTime.Parse(node.Attributes["EffectDate"].Value); //生效日期
plm.PlayElapsed = int.Parse(node.Attributes["PlayElapsed"].Value);
plm.EndDate = DateTime.Parse(node.Attributes["EndDate"].Value);
List <AMS_VideoMd5Item> lists = new List <AMS_VideoMd5Item>();
XmlNodeList nodes = xmlDoc.SelectNodes("//Root/VideoItems/Video");
//遍历找到的视频项
foreach (XmlNode n in nodes)
{
if ((n.Attributes["md5value"]) == null)
{
lists.Add(
new AMS_VideoMd5Item()
{
Name = n.Attributes["name"].Value,
PlayTime = n.Attributes["playtime"].Value,
RelativeUrl = n.Attributes["source"].Value,
md5Value = null
}
);
}
else
{
lists.Add(
new AMS_VideoMd5Item()
{
Name = n.Attributes["name"].Value,
PlayTime = n.Attributes["playtime"].Value,
RelativeUrl = n.Attributes["source"].Value,
md5Value = n.Attributes["md5value"].Value
}
);
}
//不重复的视频文件名称
int i;
for (i = 0; i < videoFiles.Count; i++)
{
if (videoFiles[i].Name == n.Attributes["name"].Value)
{
break;
}
}
if (i >= videoFiles.Count)
{
if ((n.Attributes["md5value"]) == null)
{
videoFiles.Add(new AMS_VideoMd5Item()
{
Name = n.Attributes["name"].Value, RelativeUrl = n.Attributes["source"].Value, md5Value = null
});
}
else
{
videoFiles.Add(new AMS_VideoMd5Item()
{
Name = n.Attributes["name"].Value, RelativeUrl = n.Attributes["source"].Value, md5Value = n.Attributes["md5value"].Value
});
}
}
}
plm.VideoFiles = videoFiles;
plm.PlayVideoItems = lists;
plm.PlayListTimeLength = GetTimeLength(DateTime.Parse(DateTime.Now.ToShortDateString() + " " + lists[0].PlayTime), DateTime.Parse(DateTime.Now.ToShortDateString() + " " + lists[lists.Count - 1].PlayTime));
}
catch (Exception ex)
{
throw ex;
}
return(plm);
}