If I’ve written code around PropertyChanged notification in Visual Studio once then I must have done it thousands of times so I thought I’d do a quick snippet and drop it here.

Snippet for a class that implements INotifyPropertyChanged;

<?xml version="1.0" encoding="utf-8" ?>
<CodeSnippets  xmlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet">
    <CodeSnippet Format="1.0.0">
        <Header>
            <Title>Class with property changed notification</Title>
            <Shortcut>pcclass</Shortcut>
            <Description>Code snippet for class with property changed notification</Description>
            <Author>Mike Taulty</Author>
            <SnippetTypes>
                <SnippetType>Expansion</SnippetType>
            </SnippetTypes>
        </Header>
        <Snippet>
      <Imports>
        <Import>
          <Namespace>System.ComponentModel</Namespace>
        </Import>
      </Imports>
            <Declarations>
                <Literal>
                    <ID>name</ID>
                    <ToolTip>Class name</ToolTip>
                    <Default>MyClass</Default>
                </Literal>
            </Declarations>
            <Code Language="csharp">
      <![CDATA[public class $name$ : INotifyPropertyChanged
    {
        $selected$$end$
    protected void FirePropertyChanged(string property)
    {
      if (PropertyChanged != null)
      {
        PropertyChanged(this, new PropertyChangedEventArgs(property));
      }
    }
    public event PropertyChangedEventHandler PropertyChanged;
    }]]>
            </Code>
        </Snippet>
    </CodeSnippet>
</CodeSnippets>

and a snippet for a property within that kind of class;

<?xml version="1.0" encoding="utf-8" ?>
<CodeSnippets  xmlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet">
    <CodeSnippet Format="1.0.0">
        <Header>
            <Title>prop</Title>
            <Shortcut>propch</Shortcut>
            <Description>Code snippet for a property with notification</Description>
            <Author>Mike Taulty</Author>
            <SnippetTypes>
                <SnippetType>Expansion</SnippetType>
            </SnippetTypes>
        </Header>
        <Snippet>
            <Declarations>
                <Literal>
                    <ID>type</ID>
                    <ToolTip>Property type</ToolTip>
                    <Default>int</Default>
                </Literal>
                <Literal>
                    <ID>property</ID>
                    <ToolTip>Property name</ToolTip>
                    <Default>MyProperty</Default>
                </Literal>
            </Declarations>
            <Code Language="csharp"><![CDATA[
public $type$ $property$
{
    get
    {
        return(_$property$);
    }
    set
    {
        _$property$ = value;
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs("$property$"));
        }
    }
}
$type$ _$property$;
$end$]]>
            </Code>
        </Snippet>
    </CodeSnippet>
</CodeSnippets>

hopefully I can avoid writing that explicitly ever again.

I appreciate that sometimes you might want to implement the property changed stuff in a base class (and sometimes you won’t) and there are fancier solutions around reflection and so on but I’m one for keeping-it-simple here 🙂