PowerShell - 找到起始行后从 Excel 中删除一系列行

Question

I have a PowerShell script that searches an Excel file for a specific value ("#N/A", from a failed VLOOKUP) that needs to have all of the rows AFTER and including that row deleted quickly.

What I have done so far:

$sheetRange = $sheetData.UsedRange
$colRange = $sheetData.Range("F1")
[void] $sheetRange.Sort($colRange)
$fileWorking.Save()

$strFinder = "#N/A"
$rngSearch = $sheetData.Range("F1").EntireColumn
$txtFound = $rngSearch.Find($strFinder)
$RowFound = ($txtFound.Row)
for (($i = $RowFound); ($i -le $rowsTrans); $i++)
{
  $currRow = $sheetData.Cells.Item($i).EntireRow
  [void]$currRow.Delete()
}
$fileWorking.Save()

The problem is, there are over 200k rows, and I need to delete the entire range instead of one row at a time. While I have muddled around with the syntax some, I can't quite figure out the proper syntax or methods that accomplish this.

Obviously, the for loop simply needs to go, and I need to set the entire range between $RowFound and $rowsTrans ... but how is that done?

Answer 1

I know this is super old, but I found an even better way to do this with a one-liner. This article sparked my months long journey to this single line... lol

Measure-Command { $sheet.UsedRange.SpecialCells([Microsoft.Office.Interop.Excel.XlCellType]::xlCellTypeFormulas, 16).EntireRow.Delete() } #finds any row with an #N/A and blows it away

Referenced from here.

The comment says what it does, but it searches the ENTIRE file for any cell with #N/A. I'm sure there is a way to make this even more efficient by narrowing to a single column. Hopefully this helps someone like me that couldn't get the range command to work!

BTW, this lowered my deletion times from 12-15 hours to 30 minutes on a ~30,000 line file.

Answer 2

Construct a concatenated string containing all of the addresses as you run through the Range.Find loop. Use that to define the Range object with the Range.EntireRow property to .Delete .

...Range("A2, A4, A10, A19").EntireRow.Delete

That uses a range object definition much like a Union of range objects.