C# 4 and .NET 4

1410 ❘ aPPendiX Guidelines fOr windOws 7 And windOws server 2008 r2
The public class from the Windows API Code Pack used to show
task dialogs is TaskDialog. To display a simple dialog, only the
static method Show() must be invoked. The simple dialog is shown
in Figure A-9.
TaskDialog.Show("Simple Task Dialog",
"Additional Information", "Title");
figure a-9
code snippet TaskDialogDemo/MainWindow.xaml.cs
For more features of the TaskDialog class, you can set the
Caption, Text, StandardButtons, and MainIcon properties.
You can see the result in Figure A-10.
var dlg1 = new TaskDialog();
dlg1.Caption = "Title";
dlg1.Text = "Some Information";
dlg1.StandardButtons =
figure a-10
TaskDialogStandardButtons.Ok |
TaskDialogStandardButtons.Cancel;
dlg1.Icon = TaskDialogStandardIcon.Information;
dlg1.Show();
With the task dialog, you can set the shield icon that was
first shown with command links. Also, you can expand it by
setting the ExpansionMode property. With the enumeration
TaskDialogExpandedInformationLocation, you can specify
that either the content or the footer should be expanded.
Figure A-11 shows the task dialog in collapsed mode.
var dlg2 = new TaskDialog();
dlg2.Caption = "Title";
figure a-11
dlg2.Text = "Some Information";
dlg2.StandardButtons = TaskDialogStandardButtons.Yes |
TaskDialogStandardButtons.No;
dlg2.Icon = TaskDialogStandardIcon.Shield;
dlg2.DetailsExpandedText = "Additional Text";
dlg2.DetailsExpandedLabel = "Less Information";
dlg2.DetailsCollapsedLabel = "More Information";
dlg2.ExpansionMode = TaskDialogExpandedDetailsLocation.ExpandContent;
dlg2.FooterText = "Footer Information";
dlg2.FooterIcon = TaskDialogStandardIcon.Information;
dlg2.Show();
A task dialog can also contain other controls. In the
following code snippet, a task dialog is created that contains
two radio buttons, a command link, and a progress control.
You’ve already seen command links in the previous section,
and indeed, command links are used very frequently within
task dialogs. Figure A-12 shows the task dialog with the
controls in the content area. Of course, you can also combine
the expansion mode with controls.
var radio1 = new TaskDialogRadioButton();
radio1.Name = "radio1";
radio1.Text = "One";
var radio2 = new TaskDialogRadioButton();
radio2.Name = "radio2";
radio2.Text = "Two";
figure a-12
www.it-ebooks.info