Powershell用字符串中的单个引号替换双引号

Question

I just can't get it right 我只是无法做对

The below statement throws an exception and I cannot get the correct format 以下语句抛出异常，我无法获得正确的格式

$appendedQry = $appendedQry -replace "\"","'"

What would be the correct syntax? 什么是正确的语法？

Answer 1

它应该是

$appendedQry = $appendedQry -replace '"',''''

Answer 2

this because the escaping character is ` 因为逃避的角色是`

in the following a working example 在下面的一个工作示例中

$appendedQry = "`"asd"
echo $appendedQry
$appendedQry = $appendedQry -replace "`"", "'"
echo $appendedQry

Answer 3

I was replacing all occurances of the string in a file, using command 我正在使用命令替换文件中字符串的所有出现

powershell -Command "(gc c:\input.txt) -replace 'aaa', 'bbb' | Out-File c:\output.txt"

To replace double quotes I need to do some trick - use the variable: 要替换双引号，我需要做一些技巧 - 使用变量：

$ToReplace = "\" + """"
$command = "(gc c:\input.txt) -replace '" + $ToReplace + "', 'bbb' | Out-File c:\output.txt"
powershell -Command $command