AltPropertyColumn Displays null as $null rather than blank

[Zhentar]

My object has an int? property that is null when it doesn't apply/can't be calculated. The standard Format-Table doesn't print anything when it's null. The alternate table formatting displays it as "$null" which has the unfortunate effect of making the least important information the most visible, so I have to do a ScriptColumn with a null check to handle it.

[jazzdelightsme]

Thank you for the report!

Could you give some more detail? I was not able to repro with a trivial case, both with and without a table view. I wonder if your object is being formatted with some other existing AltViewTableDefinition. Please include the TypeNames on your object (if your object is in a variable $obj, run $obj.PSObject.TypeNames). And also the result of Get-AltFormatViewDef -ForObject $obj to see the default view definition that is chosen, and Get-AltFormatViewDef -ForObject $obj -FormatInfoType ([MS.Dbg.Formatting.AltTableViewDefinition]) to specifically ask for a table view.

Here's my repro attempt:

Add-Type -TypeDefinition @'
using System;
namespace NS {
    public class Thing {
        public String Str;
        public int I1;
        public int? MaybeI2;

        public Thing( String s, int i )         { Str = s; I1 = i; }
        public Thing( String s, int i, int i2 ) { Str = s; I1 = i; MaybeI2 = i2; }
    }
}
'@

$t1 = [NS.Thing]::new("Hi", 123)
$t2 = [NS.Thing]::new("Ha", 124)
$t3 = [NS.Thing]::new("Ho", 224)
$t4 = [NS.Thing]::new("He", 66, 999)

@( $t1, $t2, $t3, $t4 ) | ft

@( $t1, $t2, $t3, $t4 ) | fat

Register-AltTypeFormatEntries {

    New-AltTypeFormatEntry -TypeName 'NS.Thing' {
        New-AltTableViewDefinition -ShowIndex {
            New-AltColumns {
                New-AltPropertyColumn -Property 'Str' -Width 7 -Alignment Right
                New-AltPropertyColumn -Property 'I1' -Alignment Right
                New-AltPropertyColumn -Property 'MaybeI2' -Alignment Right
            } # End Columns
        } # end Table view
    }
}

@( $t1, $t2, $t3, $t4 ) | fat

[Zhentar]

Hmm, I also had a format string, -FormatString "{0:N0}" it looks like it only happens with that present.