Powershell 基础知识 - 递增地增加一个变量来管理一个循环

Question

我是 PowerShell 的初学者，我正在努力让我的代码跳出 For 循环。更具体地说，我的 $parseCount 变量在调用 $ParseCount++ 时总是被重置为“1”，即使一些预先存在的条件意味着它的值是原始的“2”。因此，我一直陷入无限循环。

在下面的示例中，脚本在第一遍中正确推断出应该完成 "work" 的哪个级别。但随后它将始终将 $ParseCount 变量设置为 1，而不是 $ParseCount + 1。

我相信这很简单。在此先感谢您的帮助！

# all possible Scenarios

 If ($Scenario -ieq "Outcome1") {
                      $ParseCount=0
                      }

If ($Scenario -ieq "Outcome2") {
$ParseCount=1
}

If ($Scenario -ieq "Outcome3") {
                      $ParseCount=2
                      }

# Start the loop

For ($ParseCount -lt 3){

# determine what work to do

    If ($ParseCount=0){
             write-host "I'm doing some prerequisite stuff"
                }

    If ($ParseCount -gt 0){
             write-host "I'm doing all of the work, beacause prerequisite is done"
                           }

# Return to the top of the loop

write-host "ParseCount variable is:", $ParseCount
$ParseCount++
write-host "ParseCount was changed, is now set to:", $ParseCount

}

示例输出：

ParseCount 变量为：2 ParseCount 已更改，现在设置为 1

Answer 1

你应该改变

    If ($ParseCount=0){
             write-host "I'm doing some prerequisite stuff"
                }

    If ($ParseCount -gt 0){
             write-host "I'm doing all of the work, beacause prerequisite is done"
                           }

（这会将 $ParseCount 设置回 0）

进入

    If ($ParseCount -eq 0){
             write-host "I'm doing some prerequisite stuff"
                }

    If ($ParseCount -gt 0){
             write-host "I'm doing all of the work, beacause prerequisite is done"
                           }

Powershell 基础知识 - 递增地增加一个变量来管理一个循环

Powershell basics - incrementally increase a variable to manage a loop

powershell

for-loop

increment