之间有什么准确的区别ToolBarPanel和ToolBarTray在WPF？
我在seprate库中使用此代码进行gif Animating,在我的主项目中使用xaml代码:
<controls:GifImage GifSource="/project;component/Images/my.gif" Stretch="None" />
Gif Animating(分隔文件):
public class GifImage : Image
{
#region Memmbers
private GifBitmapDecoder _gifDecoder;
private Int32Animation _animation;
private bool _isInitialized;
#endregion Memmbers
#region Properties
private int FrameIndex
{
get { return (int)GetValue(FrameIndexProperty); }
set { SetValue(FrameIndexProperty, value); }
}
private static readonly DependencyProperty FrameIndexProperty =
DependencyProperty.Register("FrameIndex", typeof(int), typeof(GifImage), new FrameworkPropertyMetadata(0, new PropertyChangedCallback(ChangingFrameIndex)));
private static void ChangingFrameIndex(DependencyObject obj, DependencyPropertyChangedEventArgs ev)
{
GifImage image = obj as GifImage;
image.Source = image._gifDecoder.Frames[(int)ev.NewValue];
}
/// <summary>
/// Defines whether …Stack Overflow 生成重写 URL，
所以我需要知道如何像 Stack Overflow 一样做到这一点？
http://stackoverflow.com/questions/9168364/how-to-rewrite-seo-friendly-urls-like-stackoverflow => 200 ok.(without trailing slash)
http://stackoverflow.com/questions/9168364/how-to-rewrite-seo-friendly-urls-like-stackoverflow/ => 200 ok.(with trailing slash)
http://stackoverflow.com/questions/9168364/ => 301 redirect.
http://stackoverflow.com/questions/9168364 => 301 redirect.
我怎么能用 mod_rewrite 做到这一点？
我有这样的事情：
RewriteRule ^([0-9]+)[/]([^/]*) ./cat.php?id=$1&title=$2 [L,NC]
mydomain.com/999 => 404 not found.
mydomain.com/999/ => 200 ok.
mydomain.com/999/test => 200 ok.
mydomain.com/999/test/test2 => 200 ok.
mydomain.com/999/test/test2/test3 => 200 ok.
mydomain.com/999/test/test2/test3/test4 => 200 ok.
请让我知道我如何更改 RewriteRule ？
我有一个日期时间，我想显示与收到的日期时间之间的差异DateTime.Now并绑定它。结果应该是这样的：
1d 15h 13m 7s
最好的方法是什么？StringFormat？IValueConverter？