1. 我们有一个CaryActivity活动如下：
namespace CaryPropertyGridExten
{
public sealed class CaryActivity : CodeActivity
{
public InArgument<string> Text { get; set; }
public double RepeatCount { get; set; }
public string FileName { get; set; }
protected override void Execute(CodeActivityContext context)
{
}
}
}
2. 上面活动有RepeatCount和FileName属性，我们会为这两个属性在属性窗格的设置自定义属性值编辑器，要达到效果如下图：
3. 分别定义两个属性对应的属性值编辑器如下：
namespace CaryPropertyGridExten
{
class CustomInlineEditor : PropertyValueEditor
{
public CustomInlineEditor()
{
this.InlineEditorTemplate = new DataTemplate();
FrameworkElementFactory stack = new FrameworkElementFactory(typeof(StackPanel));
FrameworkElementFactory slider = new FrameworkElementFactory(typeof(Slider));
Binding sliderBinding = new Binding("Value");
sliderBinding.Mode = BindingMode.TwoWay;
slider.SetValue(Slider.MinimumProperty, 0.0);
slider.SetValue(Slider.MaximumProperty, 100.0);
slider.SetValue(Slider.ValueProperty, sliderBinding);
stack.AppendChild(slider);
FrameworkElementFactory textb = new FrameworkElementFactory(typeof(TextBox));
Binding textBinding = new Binding("Value");
textb.SetValue(TextBox.TextProperty, textBinding);
textb.SetValue(TextBox.IsEnabledProperty, false);
stack.AppendChild(textb);
this.InlineEditorTemplate.VisualTree = stack;
}
}
}
namespace CaryPropertyGridExten
{
class FilePickerEditor : DialogPropertyValueEditor
{
public FilePickerEditor()
{
this.InlineEditorTemplate = new DataTemplate();
FrameworkElementFactory stack = new FrameworkElementFactory(typeof(StackPanel));
stack.SetValue(StackPanel.OrientationProperty, Orientation.Horizontal);
FrameworkElementFactory label = new FrameworkElementFactory(typeof(Label));
Binding labelBinding = new Binding("Value");
label.SetValue(Label.ContentProperty, labelBinding);
label.SetValue(Label.MaxWidthProperty, 90.0);
stack.AppendChild(label);
FrameworkElementFactory editModeSwitch = new FrameworkElementFactory(typeof(EditModeSwitchButton));
editModeSwitch.SetValue(EditModeSwitchButton.TargetEditModeProperty, PropertyContainerEditMode.Dialog);
stack.AppendChild(editModeSwitch);
this.InlineEditorTemplate.VisualTree = stack;
}
public override void ShowDialog(PropertyValue propertyValue, IInputElement commandSource)
{
Microsoft.Win32.OpenFileDialog ofd = new Microsoft.Win32.OpenFileDialog();
if (ofd.ShowDialog() == true)
{
propertyValue.Value = ofd.FileName.Substring(ofd.FileName.LastIndexOf('\\') + 1);
}
}
}
}
4. 在CaryActivity的构造函数中增加自定义属性的信息如下，关于AttributeTableBuilder及MetadataStore的使用可参考关于元数据存储区MetadateStore及AttributeTableBuilder这篇文章。
public CaryActivity()
{
AttributeTableBuilder builder = new AttributeTableBuilder();
builder.AddCustomAttributes(typeof(CaryActivity), "RepeatCount", new EditorAttribute(typeof(CustomInlineEditor), typeof(PropertyValueEditor)));
builder.AddCustomAttributes(typeof(CaryActivity), "FileName", new EditorAttribute(typeof(FilePickerEditor), typeof(DialogPropertyValueEditor)));
MetadataStore.AddAttributeTable(builder.CreateTable());
}
例子来源：WF_WCF_Samples
