PowerShell PowerShell Classes Listing available constructors for a class
Example
5.0
In PowerShell 5.0+ you can list available constructors by calling the static new-method without parentheses.
PS> [DateTime]::new OverloadDefinitions ------------------- datetime new(long ticks) datetime new(long ticks, System.DateTimeKind kind) datetime new(int year, int month, int day) datetime new(int year, int month, int day, System.Globalization.Calendar calendar) datetime new(int year, int month, int day, int hour, int minute, int second) datetime new(int year, int month, int day, int hour, int minute, int second, System.DateTimeKind kind) datetime new(int year, int month, int day, int hour, int minute, int second, System.Globalization.Calendar calendar) datetime new(int year, int month, int day, int hour, int minute, int second, int millisecond) datetime new(int year, int month, int day, int hour, int minute, int second, int millisecond, System.DateTimeKind kind) datetime new(int year, int month, int day, int hour, int minute, int second, int millisecond, System.Globalization.Calendar calendar) datetime new(int year, int month, int day, int hour, int minute, int second, int millisecond, System.Globalization.Calendar calendar, System.DateTimeKind kind) This is the same technique that you can use to list overload definitions for any method
> 'abc'.CompareTo OverloadDefinitions ------------------- int CompareTo(System.Object value) int CompareTo(string strB) int IComparable.CompareTo(System.Object obj) int IComparable[string].CompareTo(string other) For earlier versions you can create your own function to list available constructors:
function Get-Constructor { [CmdletBinding()] param( [Parameter(ValueFromPipeline=$true)] [type]$type ) Process { $type.GetConstructors() | Format-Table -Wrap @{ n="$($type.Name) Constructors" e={ ($_.GetParameters() | % { $_.ToString() }) -Join ", " } } } } Usage:
Get-Constructor System.DateTime #Or [datetime] | Get-Constructor DateTime Constructors --------------------- Int64 ticks Int64 ticks, System.DateTimeKind kind Int32 year, Int32 month, Int32 day Int32 year, Int32 month, Int32 day, System.Globalization.Calendar calendar Int32 year, Int32 month, Int32 day, Int32 hour, Int32 minute, Int32 second Int32 year, Int32 month, Int32 day, Int32 hour, Int32 minute, Int32 second, System.DateTimeKind kind Int32 year, Int32 month, Int32 day, Int32 hour, Int32 minute, Int32 second, System.Globalization.Calendar calendar Int32 year, Int32 month, Int32 day, Int32 hour, Int32 minute, Int32 second, Int32 millisecond Int32 year, Int32 month, Int32 day, Int32 hour, Int32 minute, Int32 second, Int32 millisecond, System.DateTimeKind kind Int32 year, Int32 month, Int32 day, Int32 hour, Int32 minute, Int32 second, Int32 millisecond, System.Globalization.Cal endar calendar Int32 year, Int32 month, Int32 day, Int32 hour, Int32 minute, Int32 second, Int32 millisecond, System.Globalization.Cal endar calendar, System.DateTimeKind kind 
