/// <summary>
/// 新增永久素材（多媒体文件）
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="type">媒体文件类型，分别有图片（image）、语音（voice）、视频（video）和缩略图（thumb）</param>
/// <param name="fileName">文件名（不包含路径）</param>
/// <param name="data">数据</param>
/// <param name="errorMessage">返回新增是否成功</param>
/// <param name="title">视频素材的标题（对于其他媒体类型，忽略该参数）</param>
/// <param name="introduction">视频素材的描述（对于其他媒体类型，忽略该参数）</param>
/// <returns>返回多媒体的id；如果上传失败，返回null。</returns>
public static string Add(string userName, MultiMediaTypeEnum type, string fileName, byte[] data,
out ErrorMessage errorMessage, string title = null, string introduction = null)
{
if (type == MultiMediaTypeEnum.news)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "不能使用该方法新增永久图文消息，请使用新增图文消息的重载方法。");
return(null);
}
if (type == MultiMediaTypeEnum.video && (string.IsNullOrEmpty(title) || string.IsNullOrEmpty(introduction)))
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "新增永久视频素材时，必须提供标题和描述。");
return(null);
}
AccessToken token = AccessToken.Get(userName);
if (token == null)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "获取许可令牌失败。");
return(null);
}
string url = string.Format(urlForAddingMeterial, token.access_token, type.ToString("g"));
NameValueCollection formData = null;
if (type == MultiMediaTypeEnum.video)
{
formData.Add("description", JsonConvert.SerializeObject(new { title = title, introduction = introduction }));
}
string responseContent = HttpHelper.Upload(url, fileName, data, formData);
return(GetMediaId(responseContent, out errorMessage));
}
/// <summary>
/// 从JSON字符串解析多媒体上传结果
/// </summary>
/// <param name="json">JSON字符串</param>
/// <returns>返回多媒体上传结果</returns>
public static MultiMediaUploadResult Parse(string json)
{
var result = JsonConvert.DeserializeAnonymousType(json, new { type = "TYPE", media_id = "MEDIA_ID", created_at = 123456789 });
MultiMediaTypeEnum type = (MultiMediaTypeEnum)Enum.Parse(typeof(MultiMediaTypeEnum), result.type, true);
string mediaId = result.media_id;
DateTime createdAt = Utility.ToDateTime(result.created_at);
return(new MultiMediaUploadResult(type, mediaId, createdAt));
}
/// <summary>
/// 新增素材
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void btnAdd_Click(object sender, EventArgs e)
{
string userName = lbPublicAccount.SelectedValue;
MultiMediaTypeEnum type = (MultiMediaTypeEnum)Enum.Parse(typeof(MultiMediaTypeEnum), lbMultiMediaType.SelectedValue);
ErrorMessage errorMessage;
string mediaId = Meterial.Add(userName, type, fileUpload.FileName, fileUpload.FileBytes, out errorMessage);
if (errorMessage.IsSuccess)
{
ltrMessage.Text = string.Format("新增永久{0:g}素材成功。素材媒体id：{1}", type, mediaId);
}
else
{
ltrMessage.Text = string.Format("新增永久{0:g}素材失败。{1}", type, errorMessage);
}
}
/// <summary>
/// 批量获取素材列表
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="type">素材类型</param>
/// <param name="offset">从全部素材的该偏移位置开始返回，0表示从第一个素材返回</param>
/// <param name="count">返回素材的数量，取值在1到20之间</param>
/// <param name="errorMessage">返回是否获取成功</param>
/// <returns>返回素材列表；如果获取失败，返回null。</returns>
public static BatchMeterial BatchGet(string userName, MultiMediaTypeEnum type, int offset, int count, out ErrorMessage errorMessage)
{
if (offset < 0)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "偏移位置不能小于0。");
return(null);
}
if (count < 1 || count > 20)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "素材数量必须介于1至20之间。");
return(null);
}
string json = JsonConvert.SerializeObject(new { type = type.ToString("g"), offset = offset, count = count });
return(HttpHelper.RequestParsableResult <BatchMeterial>(urlForBatchGettingMeterial, userName, out errorMessage, null, httpMethodForBatchGettingMeterial, json));
}
/// <summary>
/// 上传多媒体文件
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="type">多媒体类型</param>
/// <param name="pathName">包含路径的文件名</param>
/// <param name="errorMessage">返回上传是否成功</param>
/// <returns>返回多媒体上传结果；如果上传失败，返回null。</returns>
public static MultiMediaUploadResult Upload(string userName, MultiMediaTypeEnum type, string pathName, out ErrorMessage errorMessage)
{
if (type == MultiMediaTypeEnum.news)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "不能使用该方法上传图文消息，请使用上传图文消息的重载方法。");
return(null);
}
AccessToken token = AccessToken.Get(userName);
if (token == null)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "获取许可令牌失败。");
return(null);
}
string url = string.Format(urlForUploadingMedia, token.access_token, type.ToString("g"));
string responseContent = HttpHelper.Upload(url, pathName);
return(ParseResult(responseContent, out errorMessage));
}
/// <summary>
/// 上传多媒体文件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void btnUpload_Click(object sender, EventArgs e)
{
string userName = lbPublicAccount.SelectedValue;
MultiMediaTypeEnum type = (MultiMediaTypeEnum)Enum.Parse(typeof(MultiMediaTypeEnum), lbMultiMediaType.SelectedValue);
string filename = fileUpload.FileName;
byte[] bytes = fileUpload.FileBytes;
ErrorMessage errorMessage;
MultiMediaUploadResult result = MultiMediaHelper.Upload(userName, type, filename, bytes, out errorMessage);
if (errorMessage.IsSuccess && result != null)
{
hlShowMultiMedia.NavigateUrl = MultiMediaHelper.GetDownloadUrl(AccessToken.Get(userName).access_token, result.MediaId);
ltrMessage.Text = "上传多媒体文件成功。";
}
else
{
hlShowMultiMedia.NavigateUrl = string.Format("javascript:alert('上传多媒体文件失败。\r\n{0}');", errorMessage);
ltrMessage.Text = string.Format("上传多媒体文件失败。\r\n{0}", errorMessage);
}
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="type">多媒体类型</param>
/// <param name="mediaId">媒体ID</param>
/// <param name="createAt">创建时间</param>
public MultiMediaUploadResult(MultiMediaTypeEnum type, string mediaId, DateTime createAt)
{
Type = type;
MediaId = mediaId;
CreatedAt = createAt;
}
/// <summary>
/// 新增临时素材（多媒体文件）
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="type">媒体文件类型，分别有图片（image）、语音（voice）、视频（video）和缩略图（thumb）</param>
/// <param name="fileName">文件名（不包含路径）</param>
/// <param name="data">数据</param>
/// <param name="errorMessage">返回上传是否成功</param>
/// <returns>返回上传多媒体文件的结果；如果上传失败，返回null。</returns>
public static MultiMediaUploadResult AddTemporary(string userName, MultiMediaTypeEnum type, string fileName, byte[] data, out ErrorMessage errorMessage)
{
return(MultiMediaHelper.Upload(userName, type, fileName, data, out errorMessage));
}
/// <summary>
/// 新增临时素材（多媒体文件）
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="type">媒体文件类型，分别有图片（image）、语音（voice）、视频（video）和缩略图（thumb）</param>
/// <param name="pathName">包含路径的文件名</param>
/// <param name="errorMessage">返回上传是否成功</param>
/// <returns>返回多媒体上传结果；如果上传失败，返回null。</returns>
public static MultiMediaUploadResult AddTemporary(string userName, MultiMediaTypeEnum type, string pathName, out ErrorMessage errorMessage, out string responseContent)
{
return(MultiMediaHelper.Upload(userName, type, pathName, out errorMessage, out responseContent));
}
