private void LoadData(params object[] args)
		{
			var format = args[0] as string;
			switch (format)
			{
				case "ppt":
					CurrentLinkViewContent = new PowerPointContent();
					break;
				case "doc":
					CurrentLinkViewContent = new WordContent();
					break;
				case "xls":
					CurrentLinkViewContent = new ExcelContent();
					break;
				case "pdf":
					CurrentLinkViewContent = new PdfContent();
					break;
				case "video":
				case "mp4":
				case "wmv":
					CurrentLinkViewContent = new VideoContent();
					break;
			}
			CurrentLinkViewContent?.Load(args);
			ContetChanged?.Invoke(this, EventArgs.Empty);
		}
		private void ReleaseData()
		{
			CurrentLinkViewContent = null;
			ContetChanged?.Invoke(this, EventArgs.Empty);
		}