PowerShell 提示输入 |各种方法和适当的例子

PowerShell输入提示简介

在 PowerShell 中，用户可以通过使用 Read-Host Cmdlet 提示来检索输入。它充当标准输入并读取用户从控制台提供的输入。由于输入也可以存储为安全字符串，因此可以使用此 cmdlet 提示输入密码。在普通的 PowerShell 或 ISE 中，在 GUI 增强型 ISE 中，请求输入的提示末尾会显示冒号；将显示一个弹出窗口以及一些按钮。本文将详细解释如何使用提示符在 PowerShell 中获取用户输入。

语法：

Read-Host
NAME
Read-Host

语法：

Read-Host [[-Prompt] <Object>] [-AsSecureString] [<CommonParameters>]
ALIASES
None

参数：

-AsSecureString：

这表明用户键入的输入被 * 隐藏。使用此参数时，输出是特定的字符串对象。该参数的数据类型为Switch。默认值为无。不接受管道输入和通配符。

-掩码输入：

这类似于功能中的安全字符串参数，只不过它返回的输出是字符串而不是安全字符串。该参数的数据类型为Switch。默认值为无。不接受管道输入和通配符。

-提示：

这表示应向用户显示的提示文本。这需要是一个字符串。如果有空格，则应将它们括在引号内。该参数的数据类型是对象。默认值为无。不接受管道输入和通配符。

PowerShell 提示输入的示例

示例#1：正常提示

输入：

Write-Host "Welcome to demo of powershell prompt input" -ForegroundColor Green
$name= Read-Host -Prompt "Enter your name"
$age= Read-Host -Prompt "Enter your age"
$city= Read-Host -Prompt "Enter your city"
Write-Host "The entered name is" $name -ForegroundColor Green
Write-Host "The entered age is" $age -ForegroundColor Green
Write-Host "The entered city is" $city -ForegroundColor Green

输出：

示例#2：将输入保存为安全字符串

输入：

Write-Host "Welcome to demo of powershell prompt input" -ForegroundColor Green
$s1= Read-Host -Prompt "Enter your subject 1 name" -AsSecureString
$s2= Read-Host -Prompt "Enter your subject 2 name" -AsSecureString
$s3= Read-Host -Prompt "Enter your subject 3 name" -AsSecureString
Write-Host "The entered name is" $s1 -ForegroundColor Green
Write-Host "The entered age is" $s2 -ForegroundColor Green
Write-Host "The entered city is" $s3 -ForegroundColor Green

输出：

示例#3：自定义表单

输入：

Write-Host "Demo of custom prompt using form" -ForegroundColor Green
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing
$testform = New-Object System.Windows.Forms.Form
$testform.Text = 'Data Entry Form'
$testform.Size = New-Object System.Drawing.Size(400,300)
$testform.StartPosition = 'CenterScreen'
$okb = New-Object System.Windows.Forms.Button
$okb.Location = New-Object System.Drawing.Point(85,130)
$okb.Size = New-Object System.Drawing.Size(75,25)
$okb.Text = 'Add'
$okb.DialogResult = [System.Windows.Forms.DialogResult]::OK
$testform.AcceptButton = $okb
$testform.Controls.Add($okb)
$cb = New-Object System.Windows.Forms.Button
$cb.Location = New-Object System.Drawing.Point(170,130)
$cb.Size = New-Object System.Drawing.Size(75,25)
$cb.Text = 'Remove'
$cb.DialogResult = [System.Windows.Forms.DialogResult]::Cancel
$testform.CancelButton = $cb
$testform.Controls.Add($cb)
$test = New-Object System.Windows.Forms.Button
$test.Location = New-Object System.Drawing.Point(270,130)
$test.Size = New-Object System.Drawing.Size(75,25)
$test.Text = 'close'
$test.DialogResult = [System.Windows.Forms.DialogResult]::Cancel
$testform.AcceptButton = $test
$testform.Controls.Add($test)
$lb = New-Object System.Windows.Forms.Label
$lb.Location = New-Object System.Drawing.Point(20,40)
$lb.Size = New-Object System.Drawing.Size(240,20)
$lb.Text = 'Please enter the information in text box:'
$testform.Controls.Add($lb)
$tb = New-Object System.Windows.Forms.TextBox
$tb.Location = New-Object System.Drawing.Point(40,80)
$tb.Size = New-Object System.Drawing.Size(240,20)
$testform.Controls.Add($tb)
$testform.Topmost = $true
$testform.Add_Shown({$tb.Select()})
$rs = $testform.ShowDialog()
if ($rs -eq [System.Windows.Forms.DialogResult]::OK)
{
$y = $tb.Text
Write-Host "Entered text is" -ForegroundColor Green
$y
}

输出：

示例#4：使用对话框提示用户输入

输入：

$yeah = New-Object System.Management.Automation.Host.ChoiceDescription "&Yes","Description."
$nah = New-Object System.Management.Automation.Host.ChoiceDescription "&No","Description."
$abort = New-Object System.Management.Automation.Host.ChoiceDescription "&Cancel","Description."
$options = [System.Management.Automation.Host.ChoiceDescription[]]($yeah, $nah, $abort)
$heading = "Demo"
$mess = "are you sure you want to continue?"
$rslt = $host.ui.PromptForChoice($heading, $mess, $options, 1)
switch ($rslt) {
0{
Write-Host "Yes" -ForegroundColor Green
}1{
Write-Host "No" -ForegroundColor Red
}2{
Write-Host "Cancel" -ForegroundColor Red
}
}
$mess = "are you satisfied with out service?"
$rslt = $host.ui.PromptForChoice($heading, $mess, $options, 1)
switch ($rslt) {
0{
Write-Host "Yes" -ForegroundColor Green
}1{
Write-Host "No" -ForegroundColor Red
}2{
Write-Host "Cancel" -ForegroundColor Red
}
}
$mess = "are you sure you want to exit?"
$rslt = $host.ui.PromptForChoice($heading, $mess, $options, 1)
switch ($rslt) {
0{
Write-Host "Yes" -ForegroundColor Green
}1{
Write-Host "No" -ForegroundColor Red
}2{
Write-Host "Cancel" -ForegroundColor Red
}
}

输出：

例子#5

输入：

Write-Host "Demo of getting confirmation along with prompt from user"
$question1 = Read-Host "do you want to continue"
if ($question1 -eq 'y') {
Write-Host "answer provided is yes" -ForegroundColor Green
}
else
{
Write-Host "answer provided is no" -ForegroundColor Red
}
$question2 = Read-Host "are you a human"
if ($question2 -eq 'y') {
Write-Host "yes, human" -ForegroundColor Green
}
else
{
Write-Host "not a human" -ForegroundColor Red
}
$question33 = Read-Host "do you believe in god"
if ($question1 -eq 'y') {
Write-Host "yes I believe in god" -ForegroundColor Green
}
else
{
Write-Host "no I dont believe in god" -ForegroundColor Red
}

输出：

例子#6

使用提示获取用户的多个输入

输入：

Write-Host "Demo of getting multiple inputs from user" -ForegroundColor Green
$ainp = @()
do {
$ips = Read-Host -Prompt "Enter ur name"
if ($ips -ne '') {$ainp += $ips}
}
until ($ips -eq 'end')
Write-Host "Entered names are" -ForegroundColor Green
$ainp
Write-Host "Demo of getting multiple user input without loop"
$dummy = "`n"
[string[]] $nl= @()
$nl = READ-HOST -Prompt "enter the names separated by comma"
$nl = $nl.Split(',').Split(' ')
Write-Host "Entered values are" -ForegroundColor Green
$dummy + $nl

输出：

结论

因此，本文详细介绍了 PowerShell 中用户输入的提示。除了解释各种方法之外，它还提供了有价值的示例。它展示了以安全格式和 GUI 获取输入的多种方法。它还解释了如何使用和不使用循环从用户那里获取多个输入值。要了解更多详细信息，建议编写和练习示例脚本。