显示“foreach”值时发出

Question

我有一个 powershell 脚本，它从 json 文件中获取客户列表，然后根据到目前为止输入的内容打印它。 但是，即使“列表”块位于“userInput header”之后，它也会显示前面的列表，为什么？

json 示例：

[
  {
    "id": 123,
    "name": "Example LTDA",
    "database": "SqlServer"
  },
  {
    "id": 321,
    "name": "ECOMMERCE SA",
    "database": "Oracle"
  }
]

脚本：

$customersJson = Get-Content "%jsonpath%\customers.json" | ConvertFrom-Json | ForEach-Object { $_.name }

while ($true) {
    #Clear-Host
    [console]::CursorVisible = $false

    #Write-Host "DEBUG: `nfullString: $fullstring `nuserInput: $userInput `nFIM." -ForegroundColor Red
    Write-Host "Type the customer name:" -ForegroundColor Yellow
    Write-Host "> " -NoNewline
    Write-Host $fullstring -ForegroundColor Cyan
    $userInput = [System.Console]::ReadKey($true)

    if( $userInput.Key -eq "Backspace" )  { $fullstring = $fullString -replace “.$”      }
    elseif( $userInput.Key -eq "Enter" ) { return $fullstring                            }
    else                                { $fullstring = $fullString + $userInput.KeyChar }

    if(($fullstring.Length -gt 1) -and ($null -ne $fullstring)) {
        $customersList = $customersJson | Where-Object { $_ -match $fullstring } #| Select-Object -First 10

        Write-Host "____________________________`n" -ForegroundColor DarkGray
        foreach($customer in $customersList) {

            # Primeira letra maíúscula
            $customer = $customer.ToLower()
            $customer = $customer.Replace($customer[0],$customer[0].ToString().ToUpper())
            if ($fullstring -eq $customer) {
                Write-Host $customer -ForegroundColor DarkRed
            } else {
                Write-Host $customer -ForegroundColor DarkGray
            }
        }
        Write-Host "____________________________" -ForegroundColor DarkGray
    }

}

[console]::CursorVisible = $true

Write-Host "Typed customer: $fullString" -ForegroundColor Red

在提示（“输入客户名称”）标题之后而不是之前显示客户列表。

Answer 1

如果您希望在客户列表之后出现提示，请将

ReadKey

语句移至呈现列表之后：

$customersJson = Get-Content '%jsonpath%\customers.json' | ConvertFrom-Json | ForEach-Object { $_.name }

$fullString = ''
[console]::CursorVisible = $false

while ($true) {
    Clear-Host

    # 1. Write prompt header
    Write-Host 'Type the customer name:' -ForegroundColor Yellow

    # 2. Optionally write customer list
    if ($fullstring.Length) {
        $customersList = $customersJson | Where-Object { $_ -match $fullstring } #| Select-Object -First 10

        Write-Host "____________________________`n" -ForegroundColor DarkGray
        foreach ($customer in $customersList) {

            # Primeira letra maíúscula
            $customer = $customer.ToLower()
            $customer = $customer.Replace($customer[0], $customer[0].ToString().ToUpper())
            if ($fullstring -eq $customer) {
                Write-Host $customer -ForegroundColor DarkRed
            }
            else {
                Write-Host $customer -ForegroundColor DarkGray
            }
        }
        Write-Host '____________________________' -ForegroundColor DarkGray
    }

    # 3. Prompt for next char
    Write-Host '> ' -NoNewline
    Write-Host $fullstring -ForegroundColor Cyan
    $userInput = [System.Console]::ReadKey($true)

    if ( $userInput.Key -eq 'Backspace' ) { 
        $fullstring = $fullString -replace '.$'      
    }
    elseif ( $userInput.Key -eq 'Enter' ) { 
        return $fullstring                            
    }
    else { 
        $fullstring = $fullString + $userInput.KeyChar 
    }
}

[console]::CursorVisible = $true

Write-Host "Typed customer: $fullString" -ForegroundColor Red