PowerShell 转换为字符串 | PowerShell参数转换为字符串

PowerShell 转换为字符串概述

最常用的字符串操作之一是交换用户的名字和姓氏。即，姓氏必须在前，名字在后。为了实现这些类型的功能，使用 PowerShell 中的 Convert-String cmdlet。 Convert-string cmdlet 首次在 PowerShell 版本 5.0 中引入。它也是用户最被低估和未被探索的 cmdlet 之一。 Convert-string cmdlet 的用途是它可以根据用户给出的示例格式化字符串。该 cmdlet 获取用户的示例输入，然后以与输入相同的模式格式化输出。

句法

下面是语法：

NAME
Convert-String
SYNTAX
Convert-String -InputObject <string> [-Example <List[psobject]>] [<CommonParameters>]
ALIASES
None

上述语法的解释：

这表示必须生成输出的样本格式。源模式在等号 (=) 的左侧指定，右侧表示目标格式。或者，可以使用属性前后的哈希表类型来格式化字符串。必须仔细观察等号后面不要留空格。它的类型是 PowerShell 对象的通用列表。它的别名是 E。默认值是 none。它不接受管道输入，并且不允许使用通配符。

参数转换为字符串

以下是转换为字符串的不同参数：

1.-输入对象

这表示要格式化的输入字符串。它的类型是字符串。默认值为无。它接受管道输入，但不允许使用通配符。

例子#1

代码：

Write-Host "Welcome to convert string tutorial"
$input=@("vignesh krishnakumar", "Nandhini venkatesan", "Vyapini Vignesh", "Rafa Nadal", "input output", "Krishnakumar sankaran", "Durgalakshmi Krishnakumar")
Write-Host "The input string is as follows" $input
Write-Host "Interchanging first and last names"
write-host "Interchnaged name is"
$input | Convert-String -Example "one two= two,one"

输出：

例子#2

输入：

Write-Host "Welcome to convert string tutorial"
$input=@("vignesh one krishnakumar", "Nandhini two venkatesan", "Vyapini three Vignesh", "Rafa four Nadal", "input five output", "Krishnakumar six sankaran", "Durgalakshmi seven Krishnakumar")
Write-Host "The input string is as follows" $input -ForegroundColor Yellow
Write-Host "Removing last name and appending hypen"
write-host "Interchnaged name is"
$output=$input | Convert-String -Example "one three two=three-one"
Write-Host $output -ForegroundColor Yellow
Write-Host "Example when strings doesnt match the format"
$input=@("vignesh krishnakumar", "Nandhini two venkatesan", "Vyapini Vignesh", "Rafa four Nadal", "input five output", "Krishnakumar sankaran", "Durgalakshmi seven Krishnakumar")
$output=$input | Convert-String -Example "one three two=three-one"
Write-Host $output -ForegroundColor Yellow

输出：

例子#3

输入：

Write-Host "Welcome to convert string tutorial"
Write-Host "Applying multiple patterns to the input"
$SamplePatterns = @(
@{before='"one","two"'; after='two: one'},
@{before='"world","1"'; after='1: world'},
@{before='"one-two","22"'; after='22: one-two'},
@{before='"hi hello","333"'; after='333: hi hello'}
)
$input = Get-Process  | Select-Object -Property ProcessName, CPU | ConvertTo-Csv -NoTypeInformation
$input | Convert-String -Example $SamplePatterns

输出：

2. 外弦

此 cmdlet 用于将 PowerShell 对象转换为字符串。

语法：

NAME
Out-String
SYNTAX
Out-String [-Stream] [-Width <int>] [-InputObject <psobject>] [<CommonParameters>]
ALIASES
None

输出字符串参数

下面是out-string的不同参数：

1.-输入对象

它表示要转换为字符串的对象。它可以是保存对象的变量、表达式或将返回对象的 cmdlet。它的类型是PS对象。默认值为无。它接受管道字符，但不接受通配符。

2.-无换行符

它表示不添加换行符，如果字符串对象包含换行符，则不会删除它们。它的类型是一个开关参数。默认值为无。它不接受管道字符，也不接受通配符。

3.-流

它表示在输出中为每个对象发送一个单独的字符串。它的类型是一个开关参数。默认值为 false。它不接受管道字符，也不接受通配符。

4.-宽度

它表示输出中应出现的字符数，多余的字符将被截断。字符的默认值为 80。默认值为无。它不接受管道字符，也不接受通配符。

例子#1

输入：

Write-Host "Welcome to out string example"
Write-Host "Reading a file and outing as string"
Write-Host "Reading the content...."
$input=get-content "C:\Vignesh\KB.txt"
Write-Host "Converting to string"
$input | Out-String

输出：

例子#2

输入：

Write-Host "Welcome to out string example"
Write-Host "find all the alias with get"
get-alias | out-string -stream | select-string "Get-"
Write-Host "find all the alias with set"
get-alias | out-string -stream | select-string "Set-"
Write-Host "find all the alias with write"
get-alias | out-string -stream | select-string "Write-"
Write-Host "find all the alias with Out"
get-alias | out-string -stream | select-string "Out-"

输出：

例子#3

输入：

Write-Host "welcome to conversion of int to string"
$int= 12
Write-Host "type before conversion is" $int.GetType()
Write-Host "Converting to int"
Write-Host $int
$new=$int.ToString()
Write-Host "Now the type is" $new.GetType() $new
Write-Host "another way of converting int to string"
$number=1654
Write-Host "The data type is" $number.GetType()
Write-Host "Converting to string"
$str=[String]$number
Write-Host "Converted data type is" $str.GetType()

输出：

例子#4

输入：

Write-Host "coversion of date time to string"
$date= Get-Date
Write-Host $date
Write-Host "The type is "$date.GetType()
Write-Host "First way of converting to string"
$first = '{0:MM/dd/yy}' -f $date
Write-Host "The type now is" $first.GetType()
Write-Host "Second way of converting to string"
$second = $date.ToShortDateString()
Write-Host "Now the type is" $second.GetType()
Write-Host "Third way of converting to string"
$Third = [String]$date
Write-Host "Now the type is" $Third.GetType()

输出：

结论

因此，本文详细介绍了 Convert-String cmdlet。它还展示了如何使用 cmdlet 以及与其关联的参数的各种示例。本文还详细介绍了 Out-String cmdlet、关联参数以及适当的示例。本文还介绍了如何使用适当的方法并借助类型转换将整数或日期时间对象转换为字符串变量。为了涵盖更多内容并详细学习，建议编写示例脚本并进行练习。