protected override void RenderBeginTag(HtmlTextWriter writer)
{
//base.RenderBeginTag(writer);
if (!Page.IsPostBack || (Page.IsPostBack && ShowOnPostBack))
{
string content = LOADING_TEMLATE;
string imageUrl = String.Empty;
if (String.IsNullOrEmpty(ImageUrl))
{
imageUrl = ResourceHelper.GetWebResourceUrl(Page, LOADING_IMAGE_NAME);
}
else
{
imageUrl = this.ResolveUrl(ImageUrl);
}
content = content.Replace("#LOADING_IMAGE_SRC#", imageUrl);
writer.Write(content);
}
}
/// <summary>
/// 转化 CSS 的内容
/// </summary>
/// <param name="src"></param>
/// <returns></returns>
private string ParseCssWebResourceUrls(string resourceContent)
{
Regex regex = new Regex("<%=WebResource\\(\".*\\.(gif|png)*\"\\)%>");
foreach (Match match in regex.Matches(resourceContent))
{
string webResourceName = match.Value.Replace("<%=WebResource(\"", string.Empty).Replace("\")%>", string.Empty);
resourceContent = resourceContent.Replace(match.Value, String.Format("\"{0}\"", ResourceHelper.GetWebResourceUrl(_site, webResourceName)));
}
return(resourceContent);
}