public static HtmlString AdvancedImageField(this SitecoreHelper helper, string fieldName, Item item, int width = 0, int height = 0, string alt = null, string cssClass = null, bool disableWebEditing = false)
{
/*
* Example usage in view @Html.Sitecore().AdvancedImageField("Cropped", Model.Item, 100, 400)
*
* */
if (item == null)
{
return(new HtmlString("No datasource set"));
}
ImageField imageField = new ImageField(item.Fields[fieldName]);
if (String.IsNullOrEmpty(imageField.Value))
{
return(new HtmlString(String.Empty));
}
XmlDocument xml = new XmlDocument();
xml.LoadXml(imageField.Value);
if (xml.DocumentElement == null)
{
return(new HtmlString("No cropping image parameters found."));
}
string cropx = xml.DocumentElement.HasAttribute("cropx") ? xml.DocumentElement.GetAttribute("cropx") : string.Empty;
string cropy = xml.DocumentElement.HasAttribute("cropy") ? xml.DocumentElement.GetAttribute("cropy") : string.Empty;
string focusx = xml.DocumentElement.HasAttribute("focusx") ? xml.DocumentElement.GetAttribute("focusx") : string.Empty;
string focusy = xml.DocumentElement.HasAttribute("focusy") ? xml.DocumentElement.GetAttribute("focusy") : string.Empty;
float.TryParse(cropx, out float cx);
float.TryParse(cropy, out float cy);
float.TryParse(focusx, out float fx);
float.TryParse(focusy, out float fy);
string imageSrc = MediaManager.GetMediaUrl(imageField.MediaItem);
string src = $"{imageSrc}?cx={cx}&cy={cy}&cw={width}&ch={height}";
string hash = HashingUtils.GetAssetUrlHash(src);
TagBuilder builder = new TagBuilder("img");
builder.Attributes.Add("src", $"{src}&hash={hash}");
builder.Attributes.Add("alt", !String.IsNullOrEmpty(imageField.Alt) ? imageField.Alt : alt);
if (!string.IsNullOrEmpty(cssClass))
{
builder.AddCssClass(cssClass);
}
return(MvcHtmlString.Create(builder.ToString(TagRenderMode.Normal)));
}
public static string GetUrl(this AdvanceImageField imageField, int width = 0, int height = 0)
{
if (imageField == null)
{
return(string.Empty);
}
if (width <= 0 || height <= 0)
{
return(string.Empty);
}
var src = string.Format("{0}?cx={1}&cy={2}&cw={3}&ch={4}",
imageField.Src, imageField.CropX, imageField.CropY, width, height);
var hash = HashingUtils.GetAssetUrlHash(src);
return(string.Format("{0}&hash={1}", src, hash));
}
protected override MediaOptions GetOptions()
{
var queryString = this.InnerRequest.QueryString;
if (queryString != null && !string.IsNullOrEmpty(queryString.Get("cx")))
{
options = new MediaOptions();
this.ProcessCustomParameters(options);
if (!options.CustomOptions.ContainsKey("cx") && !string.IsNullOrEmpty(queryString.Get("cx")))
{
options.CustomOptions.Add("cx", queryString.Get("cx"));
}
if (!options.CustomOptions.ContainsKey("cy") && !string.IsNullOrEmpty(queryString.Get("cy")))
{
options.CustomOptions.Add("cy", queryString.Get("cy"));
}
if (!options.CustomOptions.ContainsKey("cw") && !string.IsNullOrEmpty(queryString.Get("cw")))
{
options.CustomOptions.Add("cw", queryString.Get("cw"));
}
if (!options.CustomOptions.ContainsKey("ch") && !string.IsNullOrEmpty(queryString.Get("ch")))
{
options.CustomOptions.Add("ch", queryString.Get("ch"));
}
}
else
{
MediaUrlOptions mediaQueryString = this.GetMediaQueryString();
options = new MediaOptions
{
AllowStretch = mediaQueryString.AllowStretch,
BackgroundColor = mediaQueryString.BackgroundColor,
IgnoreAspectRatio = mediaQueryString.IgnoreAspectRatio,
Scale = mediaQueryString.Scale,
Width = mediaQueryString.Width,
Height = mediaQueryString.Height,
MaxWidth = mediaQueryString.MaxWidth,
MaxHeight = mediaQueryString.MaxHeight,
Thumbnail = mediaQueryString.Thumbnail
};
if (mediaQueryString.DisableMediaCache)
{
options.UseMediaCache = false;
}
string[] strArray = queryString.AllKeys;
for (int i = 0; i < strArray.Length; i = (int)(i + 1))
{
string str = strArray[i];
if ((str != null) && (queryString.Get(str) != null))
{
options.CustomOptions[str] = queryString.Get(str);
}
}
}
if (!this.IsRawUrlSafe)
{
if (Settings.Media.RequestProtection.LoggingEnabled)
{
string urlReferrer = this.GetUrlReferrer();
Log.SingleError(string.Format("MediaRequestProtection: An invalid/missing hash value was encountered. The expected hash value: {0}. Media URL: {1}, Referring URL: {2}",
HashingUtils.GetAssetUrlHash(this.InnerRequest.Path),
this.InnerRequest.Path,
string.IsNullOrEmpty(urlReferrer) ? ((object)"(empty)") : ((object)urlReferrer)),
this);
}
options = new MediaOptions();
}
return(options);
}