如何导入CSV列？ Import-Csv无法按计划工作

Question

I have a drop down list that's being populated by a CSV file. There are many columns in the CSV, but it only pulls from the Name column. Here's what I have that works just fine in most Win 7, and all Win 8+ PC's I've tried it on.

$customers = Import-CSV "$dir\Apps\customers.csv"
$List = $customers.name | Sort-Object

After that there's a ForEach loop to put each item from the list into the menu.

Lately I've been noticing an issue on a couple Win 7 PC's that I can't figure out. The import option doesn't work unless I specify all the headers with the -Header option. I get this error:

After getting it to import correctly by adding all the headers I can't get it to save $customers.name into the $List variable, with or without the sorting. However, if I provide an index number (ex $customers[2].name ) it works.

To work around this I've looked at ways to measure the number of rows in the CSV by using the following options after $customers :

$csvlength = Get-Content "$dir\Apps\customers.csv" | Measure-Object - lines

or

$csvlength = Import-CSV "$dir\Apps\customers.csv" | Measure-Object

From there I can see the length by looking at $csvlength.lines or $csvlength.count .

Is there a way to use that information to save the list of names into $List ? I've tried something like this with no success:

$List = $customers[0-$csvlength.count] | Sort-Object

Also, I've noticed that when importing the headers it includes Name in the list. If at all possible I'd like to not include the header. I also have a line at the end of the CSV that has other info in it, but no name. That shows up as a blank line. If possible I'd like that to be removed as well.

Answer 1

PowerShell v2 $array.Foo only allows access to a property Foo of the array object itself, not to a property Foo of the array elements . Allowing access to element properties via the array variable is one of the major changes that was introduced with PowerShell v3.

To work around this limitiation in v2 you need to expand the property before sorting:

$List = $customers | Select-Object -Expand name | Sort-Object