使用动态方法替换PowerShell字典中的占位符(Replace placeholders in PowerShell dictionary using dynamic method)

 引用在PowerShell字典中用实际值替换占位符我试图用dynamically实际元素值替换PowerShell字典中的占位符。 我从上面的帖子收到了一个合适的答案，但这并没有多大帮助，因为它是一个静态解决方案。 需求变化频繁，所以我无法在PowerShell脚本中硬编码。 我对PowerShell脚本做了一些更改并尝试运行。 但遇到一些错误。 以下是我的代码： 
 
$xmldata = @"
<configuration>
    <environment id="Development">
    <type>Dev</type>
    <client>Arizona%%type%%</client>
    <dataSource>Local%%client%%</dataSource>
    <path>App_Data\%%type%%\%%client%%_%%dataSource%%</path>
    <targetmachines>
        <targetmachine>
        <name>Any</name>
        <remotedirectory>D:\Inetpub\Test</remotedirectory>
        </targetmachine>
    </targetmachines>
    </environment>
</configuration>
"@

[System.Xml.XmlDocument] $configxml = [xml]$xmldata
$environmentId = "Development"
$keyValuePairs = New-Object "System.Collections.Generic.Dictionary``2[System.String,System.String]"
$configxml.SelectNodes("//configuration/environment[@id='$($environmentId)']//*[not(*)]") | `
    ForEach-Object {
                    if($_.ParentNode.ToString() -ne "targetmachine")
                    {

                        $keyValuePairs.Add($_.Name, $_.InnerText)
                    }
                }

Write-Output $keyValuePairs

Foreach ($key in $keyValuePairs.Keys)
{

    $strings = [regex]::Matches($keyValuePairs[$key], '%%([^/)]+?)%%') |ForEach-Object { $_.Groups[1].Value }
    $strings = $strings | sort -unique

    if ($strings.Count -gt 0)
    {
        $finalValue = $keyValuePairs[$key]
        $finalValue

        foreach ($placeholder in $strings)
        {
            write-host "one of the place holder is" -ForegroundColor Green
            $placeholder
            #replacing all of the placeholders (which exists between %%---%%) with actual values
            $finalValue = $finalValue.Replace("%%$placeholder%%",$keyValuePairs[$placeholder])
        }

        #Replace the original value with actual value
        $keyValuePairs[$key] = $finalValue 
    }
}

Write-Output $keyValuePairs
 
 尝试覆盖字典值时出现跟随错误 
 
Collection was modified; enumeration operation may not execute.
At line:33 char:10
+ Foreach ($key in $keyValuePairs.Keys)
+          ~~~~
    + CategoryInfo          : OperationStopped: (:) [], InvalidOperationExcept 
   ion
    + FullyQualifiedErrorId : System.InvalidOperationException
 
 注意：基本上我试图用动态方法替换所有字典值中的占位符。 有人可以帮助我如何实现以下输出 
 
Key                        Value
---                        -----
type                       Dev
client                     ArizonaDev
dataSource                 LocalArizonaDev
path                       App_Data\Dev\ArizonaDev_LocalArizonaDev

Referring to Replace placeholders with actual values in PowerShell dictionary Im trying to replace placeholders in PowerShell dictionary with actual element values dynamically. I have received an appropriate answer from the above post, But that doesn't help much since it was a static solution. The requirement changes frequently, So I cannot hardcode things in PowerShell script. I have made few changes to the PowerShell script and tried to run. But encountered some errors. Following is my code:
 
$xmldata = @"
<configuration>
    <environment id="Development">
    <type>Dev</type>
    <client>Arizona%%type%%</client>
    <dataSource>Local%%client%%</dataSource>
    <path>App_Data\%%type%%\%%client%%_%%dataSource%%</path>
    <targetmachines>
        <targetmachine>
        <name>Any</name>
        <remotedirectory>D:\Inetpub\Test</remotedirectory>
        </targetmachine>
    </targetmachines>
    </environment>
</configuration>
"@

[System.Xml.XmlDocument] $configxml = [xml]$xmldata
$environmentId = "Development"
$keyValuePairs = New-Object "System.Collections.Generic.Dictionary``2[System.String,System.String]"
$configxml.SelectNodes("//configuration/environment[@id='$($environmentId)']//*[not(*)]") | `
    ForEach-Object {
                    if($_.ParentNode.ToString() -ne "targetmachine")
                    {

                        $keyValuePairs.Add($_.Name, $_.InnerText)
                    }
                }

Write-Output $keyValuePairs

Foreach ($key in $keyValuePairs.Keys)
{

    $strings = [regex]::Matches($keyValuePairs[$key], '%%([^/)]+?)%%') |ForEach-Object { $_.Groups[1].Value }
    $strings = $strings | sort -unique

    if ($strings.Count -gt 0)
    {
        $finalValue = $keyValuePairs[$key]
        $finalValue

        foreach ($placeholder in $strings)
        {
            write-host "one of the place holder is" -ForegroundColor Green
            $placeholder
            #replacing all of the placeholders (which exists between %%---%%) with actual values
            $finalValue = $finalValue.Replace("%%$placeholder%%",$keyValuePairs[$placeholder])
        }

        #Replace the original value with actual value
        $keyValuePairs[$key] = $finalValue 
    }
}

Write-Output $keyValuePairs
 
Getting following error while trying to override the dictionary value
 
Collection was modified; enumeration operation may not execute.
At line:33 char:10
+ Foreach ($key in $keyValuePairs.Keys)
+          ~~~~
    + CategoryInfo          : OperationStopped: (:) [], InvalidOperationExcept 
   ion
    + FullyQualifiedErrorId : System.InvalidOperationException
 
Note: Basically Im trying to replace the placeholders from all over the dictionary values using dynamic method. Can someone please help me how can achive the following output
 
Key                        Value
---                        -----
type                       Dev
client                     ArizonaDev
dataSource                 LocalArizonaDev
path                       App_Data\Dev\ArizonaDev_LocalArizonaDev

原文：https://stackoverflow.com/questions/42687374