SharePoint上传文件类型

 SharePoint读取禁止上传文件类型代码：

SPWebApplication currentWebApplication = SPWebApplication.Lookup(new Uri(@"http://sp2010:82/"));
                    Collection<string> blockedFileExtensions = currentWebApplication.BlockedFileExtensions;
                    StringBuilder stringBuilder = new StringBuilder();
                    foreach (string str in blockedFileExtensions)
                    {
                        stringBuilder.Append(str);
                        stringBuilder.Append("<br/>");
                    }
                    Literal1.Text += stringBuilder.ToString();