protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
if (value != null)
{
int ret = TagUtil.CheckBlogTag(value.ToString());
if (ret != 0)
{
var err = ret > 0 ? string.Format(this.ErrorMessage, MaxCount) : "标签不得超过" + MaxLength + "个字符";
return(new ValidationResult(err));
}
}
return(null);
}
public async Task <ActionResult> Edit(int id, TopicEdit etopic, [FromServices] HtmlSanitizerService sanitizerService)
{
etopic.LoadBlog(_db);
ViewBag.CategoryID = new SelectList(_catUtil.GetCategoryList(), "CategoryID", "CategoryName", etopic.CategoryID);
int ret = TagUtil.CheckBlogTag(etopic.TagName, 1);
if (ret != 0)
{
ModelState.AddModelError("", ret > 0 ? "专题标签只能有1个" : "标签不得超过20个字符");
}
else if (!_blogUtil.CheckAdmin())
{
etopic.Content = sanitizerService.Sanitize(etopic.Content);
}
else if (ModelState.IsValid)
{
var topic = _db.Topics.Find(id);
bool uploadsaved = false;
bool bannersaved = false;
var blogcurrent = _db.BlogsInTopics.Where(bi => bi.TopicID == id).ToList();
foreach (var blog in blogcurrent)
{
_db.BlogsInTopics.Remove(blog);
}
int i = 0;
foreach (var bid in etopic.BlogIDs.Distinct())
{
var b = etopic.Blogs.SingleOrDefault(bb => bb.BlogID == bid);
if (b == null)
{
ModelState.AddModelError("", "未找到ID编号为" + bid + "的资源");
return(View(topic));
}
var blogintopic = new BlogsInTopic {
blog = b, topic = topic, BlogOrder = i++
};
_db.BlogsInTopics.Add(blogintopic);
}
if (topic.tag.TagName != etopic.TagName)
{
var tag = _db.Tags.SingleOrDefault(t => t.TagName == etopic.TagName);
if (tag == null)
{
tag = new Tag {
TagName = etopic.TagName
};
}
topic.tag = tag;
}
try
{
var originalImage = topic.ImagePath;
var originalBanner = topic.BannerPath;
bool shouldDeleteOldImage = false;
bool shouldDeleteOldBanner = string.IsNullOrWhiteSpace(etopic.BannerPath);
if (etopic.TopicImage != null)
{
shouldDeleteOldImage = topic.isLocalImg;
topic.isLocalImg = true;
var imglist = await _uploadUtil.SaveImagesAsync(new IFormFile[] { etopic.TopicImage }, true);
if (imglist.Count < 1)
{
ModelState.AddModelError("", "保存图片时发生异常。请尝试转换图片格式后再次上传。如多次出错，请汇报给管理员。");
return(View(etopic));
}
topic.ImagePath = imglist[0];
uploadsaved = true;
}
else if (!topic.isLocalImg || (topic.isLocalImg && !etopic.IsLocalImg))
{
string imgname = BlogHelper.getFirstImg(etopic.Content);
if (imgname == null || imgname.Length < 5)
{
ModelState.AddModelError("", "请添加预览图！（上传或在文中外链图片）");
return(View(etopic));
}
shouldDeleteOldImage = !etopic.IsLocalImg;
topic.isLocalImg = false;
topic.ImagePath = imgname;
}
if (etopic.TopicBanner != null)
{
var imglist = await _uploadUtil.SaveImagesAsync(new IFormFile[] { etopic.TopicBanner }, false);
if (imglist.Count < 1)
{
ModelState.AddModelError("", "图片服务器上传出错，请尝试转换图片格式后再次上传。如多次出错，请汇报给管理员。");
return(View(topic));
}
shouldDeleteOldBanner = true;
bannersaved = true;
topic.BannerPath = imglist[0];
}
else
{
topic.BannerPath = etopic.BannerPath;
}
if (shouldDeleteOldBanner && !string.IsNullOrWhiteSpace(originalBanner))
{
await _uploadUtil.DeleteFileAsync(originalBanner);
}
if (shouldDeleteOldImage && !string.IsNullOrWhiteSpace(originalImage))
{
await _uploadUtil.DeleteFilesAsync(new[] { originalImage, originalImage.Replace("/upload/", "/thumbs/") });
}
topic.UpdateDate = DateTime.Now;
topic.TopicTitle = etopic.TopicTitle;
topic.CategoryID = etopic.CategoryID;
var mention = new MentionHandler(_udb);
topic.Content = mention.ParseMentions(BlogHelper.RemoveComments(etopic.Content));
mention.SendMentionMsg(_msgUtil, User.Identity.Name, etopic.TopicTitle, Url.Action("Details", new { id = topic.TopicID }));
_db.Entry(topic).State = EntityState.Modified;
_db.SaveChanges();
TriggerEditTopic(topic);
if (User.Identity.Name != topic.Author)
{
_adminUtil.log(User.Identity.Name, "edittopic", topic.TopicID.ToString());
}
}
catch
{
if (uploadsaved)
{
await _uploadUtil.DeleteFilesAsync(new[] { topic.ImagePath, topic.ImagePath.Replace("/upload/", "/thumbs/") });
}
if (bannersaved)
{
await _uploadUtil.DeleteFileAsync(topic.BannerPath);
}
throw;
}
return(RedirectToAction("Details", new { id }));
}
return(View(etopic));
}