make-wpf-usercontrol
Generates WPF UserControl with XAML and code-behind. Use when creating a new UserControl, scaffolding a composite UI component, or generating a UserControl with optional ViewModel. Usage: /wpf-dev-pack:make-wpf-usercontrol <ControlName> [--with-viewmodel]
What this skill does
# WPF UserControl Generator
**If `$0` is empty, use the AskUserQuestion tool to ask: "Enter the UserControl name (e.g., SearchBox, UserProfile)". Do NOT proceed until a valid name is provided. Use the response as the ControlName for all subsequent steps.**
Generate a `$0Control` UserControl with XAML and code-behind.
If `--with-viewmodel` is appended, also generate a corresponding ViewModel.
- Replace `{Namespace}` with the project's root namespace detected from csproj or existing code.
- Replace `{Project}` with the target project path.
## Usage
```bash
# Basic UserControl
/wpf-dev-pack:make-wpf-usercontrol SearchBox
# With ViewModel
/wpf-dev-pack:make-wpf-usercontrol UserProfile --with-viewmodel
```
## Generated Files
### $0Control.xaml
```xml
<UserControl x:Class="{Namespace}.Controls.$0Control"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="100" d:DesignWidth="300">
<Grid>
<!-- TODO: Add your UI elements here -->
</Grid>
</UserControl>
```
### $0Control.xaml.cs
```csharp
namespace {Namespace}.Controls;
/// <summary>
/// $0 UserControl.
/// </summary>
public partial class $0Control : UserControl
{
#region Dependency Properties
public static readonly DependencyProperty HeaderProperty =
DependencyProperty.Register(
nameof(Header),
typeof(string),
typeof($0Control),
new PropertyMetadata(string.Empty));
/// <summary>
/// Gets or sets the header text.
/// </summary>
public string Header
{
get => (string)GetValue(HeaderProperty);
set => SetValue(HeaderProperty, value);
}
#endregion
public $0Control()
{
InitializeComponent();
}
}
```
### With ViewModel Option
**$0ControlViewModel.cs**
```csharp
namespace {Namespace}.ViewModels;
public partial class $0ControlViewModel : ObservableObject
{
[ObservableProperty] private string _title = string.Empty;
[RelayCommand]
private void Submit()
{
// TODO: Implement submit logic
}
}
```
**$0Control.xaml (with ViewModel)**
> **No inline runtime `DataContext`.** Inline `<UserControl.DataContext>` (and
> code-behind `DataContext = new …`) is prohibited (P-001-c). Declare a
> design-time `d:DataContext` for IntelliSense only; the runtime DataContext is
> supplied by the composition root — the parent passes the VM, or a
> `Mappings.xaml` `DataTemplate` resolves this control as the View for
> `$0ControlViewModel` (ViewModel First). This matches `make-wpf-viewmodel`.
```xml
<UserControl x:Class="{Namespace}.Controls.$0Control"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:vm="clr-namespace:{Namespace}.ViewModels"
mc:Ignorable="d"
d:DataContext="{d:DesignInstance Type=vm:$0ControlViewModel}">
<Grid>
<TextBlock Text="{Binding Title}"/>
</Grid>
</UserControl>
```
## UserControl vs CustomControl
| Aspect | UserControl | CustomControl |
|--------|-------------|---------------|
| Purpose | Reuse within specific app | Library distribution |
| Styling | Limited | Full ControlTemplate replacement |
| Complexity | Low | High |
| Creation | XAML + Code-behind | Class + Generic.xaml |
## When to Use UserControl
- ✅ UI composition used only within the app
- ✅ Rapid prototyping
- ✅ Simple composite controls
- ❌ External library distribution → Use CustomControl
## File Location
```
{Project}/
├── Controls/
│ ├── $0Control.xaml
│ └── $0Control.xaml.cs
└── ViewModels/
└── $0ControlViewModel.cs (with --with-viewmodel option)
```
## DependencyProperty Pattern
Use DependencyProperty to receive external bindings in UserControl:
```csharp
public static readonly DependencyProperty ValueProperty =
DependencyProperty.Register(
nameof(Value),
typeof(string),
typeof($0Control),
new FrameworkPropertyMetadata(
string.Empty,
FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
OnValueChanged));
public string Value
{
get => (string)GetValue(ValueProperty);
set => SetValue(ValueProperty, value);
}
private static void OnValueChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (d is $0Control control)
{
// Handle value change
}
}
```
```xml
<!-- Usage example -->
<local:$0Control Value="{Binding MyValue, Mode=TwoWay}"/>
```
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