/// <summary>
/// 返回信息封面图
/// </summary>
public string GetImgUrl(int channel_id, int article_id)
{
string channelName = new BLL.site_channel().GetChannelName(channel_id);//查询频道名称
if (string.IsNullOrEmpty(channelName))
{
return(string.Empty);
}
return(dal.GetImgUrl(channelName, article_id));
}