/// <summary>
/// 将实体转为XML
/// </summary>
/// <typeparam name="T">RequestMessage或ResponseMessage</typeparam>
/// <param name="entity">实体</param>
/// <returns></returns>
public static XDocument ConvertEntityToXml <T>(this T entity) where T : class, new()
{
entity = entity ?? new T();
var doc = new XDocument();
doc.Add(new XElement("xml"));
var root = doc.Root;
/* 注意！
* 经过测试，微信对字段排序有严格要求，这里对排序进行强制约束
*/
var propNameOrder = new List <string>()
{
"ToUserName", "FromUserName", "CreateTime", "MsgType"
};
//不同返回类型需要对应不同特殊格式的排序
if (entity is ResponseMessageNews)
{
propNameOrder.AddRange(new[] { "ArticleCount", "Articles", "FuncFlag", /*以下是Atricle属性*/ "Title ", "Description ", "PicUrl", "Url" });
}
else if (entity is ResponseMessageMusic)
{
propNameOrder.AddRange(new[] { "Music", "FuncFlag", "ThumbMediaId", /*以下是Music属性*/ "Title ", "Description ", "MusicUrl", "HQMusicUrl" });
}
else if (entity is ResponseMessageImage)
{
propNameOrder.AddRange(new[] { "Image", /*以下是Image属性*/ "MediaId " });
}
else if (entity is ResponseMessageVoice)
{
propNameOrder.AddRange(new[] { "Voice", /*以下是Voice属性*/ "MediaId " });
}
else if (entity is ResponseMessageVideo)
{
propNameOrder.AddRange(new[] { "Video", /*以下是Video属性*/ "MediaId ", "Title", "Description" });
}
else
{
//如Text类型
propNameOrder.AddRange(new[] { "Content", "FuncFlag" });
}
Func <string, int> orderByPropName = propNameOrder.IndexOf;
var props = entity.GetType().GetProperties().OrderBy(p => orderByPropName(p.Name)).ToList();
foreach (var prop in props)
{
var propName = prop.Name;
if (propName == "Articles")
{
//文章列表
var atriclesElement = new XElement("Articles");
var articales = prop.GetValue(entity, null) as List <Article>;
foreach (var articale in articales)
{
var subNodes = ConvertEntityToXml(articale).Root.Elements();
atriclesElement.Add(new XElement("item", subNodes));
}
root.Add(atriclesElement);
}
else if (propName == "Music" || propName == "Image" || propName == "Video" || propName == "Voice")
{
//音乐、图片、视频、语音格式
var musicElement = new XElement(propName);
var media = prop.GetValue(entity, null);// as Music;
var subNodes = ConvertEntityToXml(media).Root.Elements();
musicElement.Add(subNodes);
root.Add(musicElement);
}
else
{
switch (prop.PropertyType.Name)
{
case "String":
root.Add(new XElement(propName,
new XCData(prop.GetValue(entity, null) as string ?? "")));
break;
case "DateTime":
root.Add(new XElement(propName, WeixinTimestampHelper.FromBeijingTime((DateTime)prop.GetValue(entity, null))));
break;
case "Boolean":
if (propName == "FuncFlag")
{
root.Add(new XElement(propName, (bool)prop.GetValue(entity, null) ? "1" : "0"));
}
else
{
goto default;
}
break;
case "ResponseMsgType":
root.Add(new XElement(propName, new XCData(prop.GetValue(entity, null).ToString().ToLower())));
break;
case "Article":
root.Add(new XElement(propName, prop.GetValue(entity, null).ToString().ToLower()));
break;
default:
root.Add(new XElement(propName, prop.GetValue(entity, null)));
break;
}
}
}
return(doc);
}
