protected override void Render(HtmlTextWriter writer)
{
if (_usingSprites)
{
// Need to output the src element but without using the ImageUrl (ViewState)
string imageUrl = ImageOptimizations.GetBlankImageSource(new HttpContextWrapper(Context).Request.Browser);
ImageHtmlTextWriter imageHtmlTextWriter = new ImageHtmlTextWriter(writer, ResolveClientUrl(imageUrl));
base.Render(imageHtmlTextWriter);
}
else
{
base.Render(writer);
}
}
/// <summary>
/// Creates a reference to the sprite / inlined version of the desired image including special attributes.
/// </summary>
/// <param name="virtualPath">The relative path of the image to be displayed</param>
/// <param name="htmlAttributes">Html Attributes of IDictionary form</param>
/// <returns>Image tag.</returns>
public static IHtmlString Image(string virtualPath, IDictionary <string, object> htmlAttributes)
{
ImageOptimizations.EnsureInitialized();
TagBuilder htmlTag = new TagBuilder("img");
htmlTag.MergeAttributes(htmlAttributes);
HttpContextBase httpContext = new HttpContextWrapper(HttpContext.Current);
if (ImageOptimizations.LinkCompatibleCssFile(httpContext.Request.Browser) == null)
{
htmlTag.MergeAttribute("src", ResolveUrl(virtualPath));
return(new HtmlString(htmlTag.ToString(TagRenderMode.SelfClosing)));
}
else
{
htmlTag.AddCssClass(ImageOptimizations.MakeCssClassName(virtualPath));
htmlTag.MergeAttribute("src", ResolveUrl(ImageOptimizations.GetBlankImageSource(httpContext.Request.Browser)));
return(new HtmlString(htmlTag.ToString(TagRenderMode.SelfClosing)));
}
}