StreamWriter WriteLine 如何在 Powershell 中附加而不是覆盖

Question

我试图让这个 StreamWriter WriteLine 将文本附加到已经存在的文件，但它正在覆盖它。

$inputFile = ".\input.txt"
$outputFile = ".\output.txt"

$reader = [io.StreamReader]::New($inputFile)
$writer = [io.StreamWriter]::New($outputFile)

while($reader.EndOfStream -ne $true) {
    $readerLine = $reader.Readline()
    if ($readerLine -like '#*') {
        # skip line if it starts with #
    } 
    elseif ($readerLine -like '') {
        # skip empty lines
    } 
    else {
        $writer.WriteLine($readerLine);
    }
}
$reader.Close();$reader.Dispose();
$writer.Close();$writer.Dispose();

Answer 1

从StreamWriter Constructor documentation开始，您需要启用追加。

$writer = [io.StreamWriter]::New($outputFile, $true)

StreamWriter WriteLine 如何在 Powershell 中附加而不是覆盖

How can StreamWriter WriteLine append instead of overwrite in Powershell

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streamwriter