public async Task <MessageModel <UploadFileModel> > DeleteThisFile(int?fileId)
{
var data = new MessageModel <UploadFileModel>();
UploadFileModel upfileModels = new UploadFileModel();
if (!fileId.HasValue)
{
data.msg = "没参数";
return(data);
}
FileCenter tfile = await _fileCenterServices.QueryById(fileId.Value);
if (tfile != null && tfile.ExterndAtt == SystemConst.FILE_EXTERNARR_THUMBONTHIS)
{
//检测一下，如果是主图，要重新生成主图和缩略图信息
//下载下来这个批次中排首的图，重新生成缩略图
FileCenter nextfile = await _fileCenterServices.GetFirstOneExceptMe(tfile.BatchId, tfile.Id);
//更新这个图为主图
Stream s = AliYunOss.Instance.GetFileFromAliOss(nextfile.OssKey);
if (nextfile != null)
{
string filethumbName = IdCreatorHelper.CreateIdNoTimestrap(SystemConst.PREF_THUMB_NAME_PUB_TREE, 6) + ".jpg";
string AliossFolder = DateTime.Now.ToString("yyyyMMddHH");
string newthumbUrl = await CreateThumb(s, nextfile.BatchId, AliossFolder + "/" + filethumbName);
nextfile.ExterndAtt = SystemConst.FILE_EXTERNARR_THUMBONTHIS;
//更新这个批次的缩略图信息
bool thumbok = await _fileCenterServices.UpdateThisFileUrlByBatchIdAndSeq(nextfile.BatchId, 0, newthumbUrl);
bool isOk = await _fileCenterServices.Update(nextfile);
upfileModels.MainPic = nextfile.Url;
upfileModels.ThumbnailUrl = newthumbUrl;
data.response = upfileModels;
}
}
bool isOK = await _fileCenterServices.DeleteById(fileId.Value);
data.msg = isOK ? "删除成功" : "删除失败";
return(data);
}
public async Task <MessageModel <UploadFileModel> > PushPic()
{
var data = new MessageModel <UploadFileModel>();
int currentIndex = 1;
UploadFileModel upfileModels = new UploadFileModel();
string batchId = Request.Form["batchId"];
//先检查有没有batchid,如果有，说明已开始存入过，那么不需要new batchid
if (string.IsNullOrEmpty(batchId))
{
batchId = IdCreatorHelper.CreateId(SystemConst.PREF_BATCHID_FOR_PUB_TREE);
}
else
{
//找到此batchid 已累计增加的index ,用缓存缓住
string currindex = _cacheHelper.Get <string>(batchId);
currentIndex = int.Parse(string.IsNullOrEmpty(currindex)?"1":currindex);
}
IFormFileCollection cols = Request.Form.Files;
if (cols == null || cols.Count == 0)
{
data.msg = "没有上传文件";
return(data);
}
//上传到oss
string AliossFolder = DateTime.Now.ToString("yyyyMMddHH");
List <FileCenter> dbfiles = new List <FileCenter>();
upfileModels.BatchId = batchId;
List <IFormFile> postFiles = cols.ToList();
for (int i = 0; i < postFiles.Count; i++)
{
var tfile = postFiles[i];
string fileName = AliossFolder + "/" + IdCreatorHelper.CreateIdNoTimestrap(SystemConst.PREF_ALIOSS_FILENAME_FOR_TREE, 6) + ".jpg";
AliYunOss.Instance.PutFileToOss(tfile.OpenReadStream(), fileName);
FileCenter f = new FileCenter();
if (currentIndex == 1)//默认第一个设置缩略图，设为主图
{
string filethumbName = IdCreatorHelper.CreateIdNoTimestrap(SystemConst.PREF_THUMB_NAME_PUB_TREE, 6) + ".jpg";
FileCenter thumbfile = await CreateThumb(tfile, batchId, AliossFolder + "/" + filethumbName);
dbfiles.Add(thumbfile);
upfileModels.ThumbnailUrl = thumbfile.Url;
upfileModels.MainPic = AliYunOssConfig.Endpoint + "/" + fileName; //第一个默认主图
f.ExterndAtt = SystemConst.FILE_EXTERNARR_THUMBONTHIS; //设置浮标，标明 缩略图建立在这个图上
}
f.BatchId = batchId;
f.BatchSeq = currentIndex;
f.CreateTime = DateTime.Now;
f.FileName = tfile.FileName;
f.FileSize = tfile.Length;
f.Status = 0;
f.OssKey = fileName;
f.Url = AliYunOssConfig.Endpoint + "/" + fileName;
dbfiles.Add(f);
currentIndex++;
}
_cacheHelper.Set <string>(batchId, currentIndex.ToString(), DateTime.Now.AddHours(1));
try
{
bool isok = await _fileCenterServices.AddIsIdentity(dbfiles);
dbfiles.ForEach(u => upfileModels.files.Add(u.FileName, u.Id));
}
catch (Exception ex)
{
string e = ex.ToString();
}
//返回这一批次ID，返回已上传的ID
data.response = upfileModels;
return(data);
}
