How can I store a given document in a specific format using CreateSerializerWriter methods ?
You can store a given document format using CreateSerializerWriter method as follows. [C#] // Create a SerializerProvider for accessing plug-in serializers. SerializerProvider serializerProvider = new SerializerProvider(); // Locate the serializer that matches the fileName extension. SerializerDescriptor selectedPlugIn = null; foreach ( SerializerDescriptor serializerDescriptor in serializerProvider.InstalledSerializers ) { if ( serializerDescriptor.IsLoadable && fileName.EndsWith(serializerDescriptor.DefaultFileExtension) ) { // The plug-in serializer and fileName extensions match. selectedPlugIn = serializerDescriptor; break; // foreach } } // If a match for a plug-in serializer was found, // use it to output and store the document. if (selectedPlugIn != null) { Stream package = File.Create(fileName); SerializerWriter serializerWriter = serializerProvider.CreateSerializerWriter(selectedPlugIn, package); IDocumentPaginatorSource idoc = flowDocument as IDocumentPaginatorSource; serializerWriter.Write(idoc.DocumentPaginator, null); package.Close(); return true; }
How can I create Four Button controls with the contents set to a String, a DateTimeObject, an UIElement and A Panel that contains other UIElement objects?
The example Extensible Application Markup Language (XAML) version could use the <Button.Content> tags around the content of each button, but it is not necessary. The Four buttons can be created as follows. [XAML] <!–Create a Button with a string as its content.–> <Button>This is string content of a Button</Button> <!–Create a Button with a DateTime object as its content.–> <Button xmlns:sys=’clr-namespace:System;assembly=mscorlib’> <sys:DateTime>2004/3/4 13:6:55</sys:DateTime> </Button> <!–Create a Button with a single UIElement as its content.–> <Button> <Rectangle Height=’40’ Width=’40’ Fill=’Blue’/> </Button> <!–Create a Button with a panel that contains multiple objects as its content.–> <Button> <StackPanel> <Ellipse Height=’40’ Width=’40’ Fill=’Blue’/> <TextBlock TextAlignment=’Center’>Button</TextBlock> </StackPanel> </Button>
How do I enumerate child objects in a visual tree ?
WPF has a “VisualTreeHelper” class that provides the functionality to retrieve the parent objects of a visual object using the GetParent() method and child objects of a visual object using the GetChild() method by specifying the index value of the child. The following code snippet is used to enumerate all the child objects of a visual object. [C#] public void ChildEnum(Visual Visualobj) { for (int i = 0; i < VisualTreeHelper.GetChildrenCount(Visualobj); i++) { Visual childVisual = (Visual)VisualTreeHelper.GetChild(Visualobj, i); VisualEnum(childVisual); } }
How can I use a DoubleAnimation to rotate the textblock ?
The following example uses a DoubleAnimation to rotate the textblock. The textblock performs a full rotation over a duration of 20 seconds and then continues to repeat the rotation. [XAML] <TextBlock Name=’MyRotatingText’ Margin=’20’ Width=’640′ Height=’100′ FontSize=’48’ FontWeight=’Bold’ Foreground=’Teal’ > This is rotating text <TextBlock.RenderTransform> <RotateTransform x:Name=’MyRotateTransform’ Angle=’0′ CenterX=’230′ CenterY=’25’/> </TextBlock.RenderTransform> <!– Animates the text block’s rotation. –> <TextBlock.Triggers> <EventTrigger RoutedEvent=’TextBlock.Loaded’> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetName=’MyRotateTransform’ Storyboard.TargetProperty='(RotateTransform.Angle)’ From=’0.0′ To=’360′ Duration=’0:0:10′ RepeatBehavior=’Forever’ /> </Storyboard> </BeginStoryboard> </EventTrigger> </TextBlock.Triggers> </TextBlock>
How can I create a combined hard and soft shadow ?
This can be done as follows. [XAML] <!– Hard shadow on top of soft shadow. –> <TextBlock Text=’Shadow Text’ Foreground=’CornflowerBlue’> <TextBlock.BitmapEffect> <BitmapEffectGroup> <BitmapEffectGroup.Children> <DropShadowBitmapEffect ShadowDepth=’5′ Direction=’330′ Color=’DarkSlateBlue’ Opacity=’0.75′ Softness=’0.50′ /> <DropShadowBitmapEffect ShadowDepth=’2′ Direction=’330′ Color=’Maroon’ Opacity=’0.5′ Softness=’0.0′ /> </BitmapEffectGroup.Children> </BitmapEffectGroup> </TextBlock.BitmapEffect> </TextBlock>