/// <summary>
/// 添加永久视频素材
/// </summary>
/// <param name="title">视频素材的标题</param>
/// <param name="description">视频素材的描述</param>
/// <param name="filename">文件名</param>
/// <param name="dataStream">数据流</param>
/// <param name="config"></param>
/// <returns></returns>
public static Task <AddResult> AddVideo(string title, string description, string filename, Stream dataStream, ApiConfig config = null)
{
var additionalFields = new[]
{
new KeyValuePair <string, string>("description", ApiHelper.ToJsonString(new { title, description }, config))
};
return(ApiHelper.UploadResult <AddResult>("https://api.weixin.qq.com/cgi-bin/material/add_material?$acac$&type=thumb", "media", filename, dataStream, additionalFields, config));
}
