I have C# / XAML win store app which receives various data from json. one piece of it - html string.
I display that string using WebView.NavigateToString
However I don't see how can I style it. Normally I would use blend to get default style and then edit it. But Blend doesn't let me style WebView.
I ended up wrapping the json html into
<body style='background-color:black;color:white' />
but this approach doesn't let me use theming which the rest of the application does.
What is the 'proper' way to style and / or format content of the WebView?
Another solution is making a WebViewContentHelper (or so) class. You may pass the theme and style the CSS according to that. For example:
string content = WebViewContentHelper.WrapHtml(originalHtmlString, backGroundColor, webView.ActualHeight);
webView.NavigateToString(content);
You can adapt this class that already copies the Font styling from Windows 8 and gives you horizontal scrolling, also arranges content in columns, just as ItemDetails Template:
class WebContentHelper
{
public static string HtmlHeader(double viewportWidth, double height) //adapt parametres
{
var head = new StringBuilder();
head.Append("<head>");
head.Append("<meta name=\"viewport\" content=\"initial-scale=1, maximum-scale=1, user-scalable=0\"/>");
head.Append("<script type=\"text/javascript\">"+
"document.documentElement.style.msScrollTranslation = 'vertical-to-horizontal';"+
"</script>"); //horizontal scrolling
//head.Append("<meta name=\"viewport\" content=\"width=720px\">");
head.Append("<style>");
head.Append("html { -ms-text-size-adjust:150%;}");
head.Append(string.Format("h2{{font-size: 48px}} "+
"body {{background:white;color:black;font-family:'Segoe UI';font-size:18px;margin:0;padding:0;display: block;"+
"height: 100%;"+
"overflow-x: scroll;"+
"position: relative;"+
"width: 100%;"+
"z-index: 0;}}"+
"article{{column-fill: auto;column-gap: 80px;column-width: 500px; column-height:100%; height:630px;"+
"}}"+
"img,p.object,iframe {{ max-width:100%; height:auto }}"));
head.Append(string.Format("a {{color:blue}}"));
head.Append("</style>");
// head.Append(NotifyScript);
head.Append("</head>");
return head.ToString();
}
public static string WrapHtml(string htmlSubString, double viewportWidth, double height)
{
var html = new StringBuilder();
html.Append("<html>");
html.Append(HtmlHeader(viewportWidth,height));
html.Append("<body><article class=\"content\">");
html.Append(htmlSubString);
html.Append("</article></body>");
html.Append("</html>");
return html.ToString();
}
}