Silverlight 4 Beta has just released On November 18, 2009.
Check it out at: http://silverlight.net/getstarted/silverlight-4-beta/
New features which I was look forward to:
- Mouse wheel support for scrollable controls (no additional behaviour is required)
- Right click support
- Clipboard support
- Full editable design surface for VS2010
It could be good fun to move to SL4 soon.
Ramesh Subramanian post an excellent solution to have data validation element showing for DatePicker control.
http://www.rameshsubramanian.org/2009/09/silverlight-datepicker-validation.html
Check it out.
http://www.sharpgis.net/post/2009/08/11/Silverlight-Behaviors-Triggers-and-Actions.aspx
WebRequest request = WebRequest.Create(url);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
if (response.ContentType.StartsWith("text/html", true, CultureInfo.CurrentCulture))
{
//Html page
}
public static class ScrollViewerExtension
{
/// <summary>
/// Scroll to the current element, if there is has an parent scrollviewer
/// </summary>
/// <param name="target"></param>
public static void ScrollToElement(this UIElement target)
{
ScrollToElement(target, null);
}
/// <summary>
/// Find next level scrollviewer, and scroll to the target element
/// </summary>
/// <param name="target"></param>
/// <param name="childScroller"></param>
private static void ScrollToElement(this UIElement target, ScrollViewer childScroller)
{
try
{
ScrollViewer scrollViewer;
if (childScroller == null)
{
scrollViewer = ParentOfType<ScrollViewer>(target);
}
else
{
scrollViewer = ParentOfType<ScrollViewer>(childScroller);
}
if (scrollViewer != null)
{
if (scrollViewer.ComputedVerticalScrollBarVisibility == Visibility.Visible)
{
UIElement scrollContent = scrollViewer.Content as UIElement;
GeneralTransform gtToContent = target.TransformToVisual(scrollContent);
Point offsetToContent = gtToContent.Transform(new Point(0, 0));
GeneralTransform gtToScroller = target.TransformToVisual(scrollViewer);
Point offsetToScroller = gtToScroller.Transform(new Point(0, 0));
if (offsetToScroller.Y < 5 offsetToScroller.Y > scrollViewer.ViewportHeight)
{
scrollViewer.UpdateLayout();
scrollViewer.ScrollToVerticalOffset(offsetToContent.Y - scrollViewer.ViewportHeight / 4);
}
}
ScrollViewer parentScroller = ParentOfType<ScrollViewer>(scrollViewer);
if (parentScroller != null)
{
ScrollToElement(target, scrollViewer);
}
}
}
catch
{
//TODO: Log exception message here
}
}
private static T ParentOfType<T>(UIElement currentElement) where T:DependencyObject
{
return currentElement.GetVisualAncestors().Where(p => p is T).FirstOrDefault() as T;
}
}
This is an awesome read. We should do this sometime and break the web site into two parts:
1. Service
2. Web host / navigation
http://www.cnblogs.com/flyskyer/archive/2009/07/09/1519766.html