Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
Visual Studio snippets for * quickly creating a MVVM property that raises INotifyPropertyChanged.PropertyChanged * quickly creating a MVVM DependencyProperty And related static methods for determining a property name via reflection at runtime
<?xml version="1.0" encoding="utf-8"?>
<CodeSnippets mlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet">
<CodeSnippet Format="1.0.0">
<Header>
<SnippetTypes>
<SnippetType>Expansion</SnippetType>
</SnippetTypes>
<Title>MVVM Dependency Property</Title>
<Author>Phil Chuang</Author>
<Description>A snippet for generating a Dependency Property</Description>
<HelpUrl></HelpUrl>
<Shortcut>mvvmdepprop</Shortcut>
</Header>
<Snippet>
<Declarations>
<Literal Editable="true">
<ID>PropertyType</ID>
<ToolTip>Property type</ToolTip>
<Default>Object</Default>
<Function>
</Function>
</Literal>
<Literal Editable="true">
<ID>PropertyName</ID>
<ToolTip>Property name</ToolTip>
<Default>Property</Default>
<Function>
</Function>
</Literal>
<Literal default="true" Editable="false">
<ID>ClassName</ID>
<ToolTip>Class name</ToolTip>
<Function>ClassName()</Function>
<Default>ClassNamePlaceholder</Default>
</Literal>
</Declarations>
<Code Language="CSharp">
<![CDATA[public $PropertyType$ $PropertyName$
{
get { return ($PropertyType$) GetValue ($PropertyName$Property); }
set { SetValue ($PropertyName$Property, value); }
}
public static readonly DependencyProperty $PropertyName$Property = DependencyProperty.Register (
INotifyPropertyChangedHelper.GetPropertyName (($ClassName$ c) => c.$PropertyName$),
typeof ($PropertyType$),
typeof ($ClassName$),
new PropertyMetadata (null, On$PropertyName$Changed));
private static void On$PropertyName$Changed (DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var instance = d as $ClassName$;
if (instance == null) return;
var oldValue = ($PropertyType$) e.OldValue;
var newValue = ($PropertyType$) e.NewValue;
// TODO implement
}]]>
</Code>
</Snippet>
</CodeSnippet>
</CodeSnippets>
public static class INotifyPropertyChangedHelper
{
public static String GetPropertyName<T> (Expression<Func<T>> propertyExpression)
{
if (propertyExpression == null) throw new ArgumentNullException ("propertyExpression");
if (propertyExpression.Body.NodeType == ExpressionType.MemberAccess)
{
var memberExpr = (MemberExpression) propertyExpression.Body;
return memberExpr.Member.Name;
}
if (propertyExpression.Body.NodeType == ExpressionType.Convert
&& propertyExpression.Body is UnaryExpression
&& ((UnaryExpression) propertyExpression.Body).Operand.NodeType == ExpressionType.MemberAccess)
{
var memberExpr = (MemberExpression) ((UnaryExpression) propertyExpression.Body).Operand;
return memberExpr.Member.Name;
}
throw new Exception (String.Format ("Expected MemberAccess expression, got {0}", propertyExpression.Body.NodeType));
}
public static String GetPropertyName<T, V> (Expression<Func<T, V>> propertyExpression)
{
if (propertyExpression == null) throw new ArgumentNullException ("propertyExpression");
if (propertyExpression.Body.NodeType == ExpressionType.MemberAccess)
{
var memberExpr = (MemberExpression) propertyExpression.Body;
return memberExpr.Member.Name;
}
if (propertyExpression.Body.NodeType == ExpressionType.Convert
&& propertyExpression.Body is UnaryExpression
&& ((UnaryExpression) propertyExpression.Body).Operand.NodeType == ExpressionType.MemberAccess)
{
var memberExpr = (MemberExpression) ((UnaryExpression) propertyExpression.Body).Operand;
return memberExpr.Member.Name;
}
throw new Exception (String.Format ("Expected MemberAccess expression, got {0}", propertyExpression.Body.NodeType));
}
}
<?xml version="1.0" encoding="utf-8"?>
<CodeSnippets mlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet">
<CodeSnippet Format="1.0.0">
<Header>
<SnippetTypes>
<SnippetType>Expansion</SnippetType>
</SnippetTypes>
<Title>MVVM Property</Title>
<Author>Phil Chuang</Author>
<Description>A snippet for generating a backed Property that calls RaisePropertyChanged</Description>
<HelpUrl></HelpUrl>
<Shortcut>mvvmprop</Shortcut>
</Header>
<Snippet>
<Declarations>
<Literal Editable="true">
<ID>Type</ID>
<ToolTip>Property type</ToolTip>
<Default>Object</Default>
<Function>
</Function>
</Literal>
<Literal Editable="true">
<ID>PropertyName</ID>
<ToolTip>Property name</ToolTip>
<Default>Property</Default>
<Function>
</Function>
</Literal>
</Declarations>
<Code Language="CSharp">
<![CDATA[private $Type$ my$PropertyName$;
public $Type$ $PropertyName$
{
get { return my$PropertyName$; }
set
{
my$PropertyName$ = value;
RaisePropertyChanged (() => $PropertyName$);
}
}]]>
</Code>
</Snippet>
</CodeSnippet>
</CodeSnippets>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.