无法转换参数“地址”，值为：“System.Object []”，为“DownloadString”键入“System.Uri”：“无法转换”System.Object []“

Question

我需要创建一个脚本使在3个不同的环境URL的请求，然后生成与每个环境的平均响应时间的CSV文件，我发送的每个页面

但是我得到这个错误：

Cannot convert argument "address", with value: "System.Object[]", for "DownloadString" to type "System.Uri": "Cannot convert the "System.Object[]" value of type "System.Object[]" to type "System.Uri".

这里是我的代码：

function ResponseTime($CommonName,$URL, $environment) 
{ 
    $Times = 5 
    $i = 0 
    $TotalResponseTime = 0 

    While ($i -lt $Times) { 
     $Request = New-Object System.Net.WebClient 
     $Request.UseDefaultCredentials = $true 
     $Start = Get-Date 
     $PageRequest = $Request.DownloadString($URL) 
     $TimeTaken = ((Get-Date) - $Start).TotalMilliseconds 
     $Request.Dispose() 
     $i ++ 
     $TotalResponseTime += $TimeTaken 
    } 

    $AverageResponseTime = $TotalResponseTime/$i 
    Write-Host Request to $CommonName took $AverageResponseTime ms in average -ForegroundColor Green 

    $details = @{    
     Date    = get-date    
     AverageResponseTime  = $AverageResponseTime    
     ResponseTime  = $Destination 
     Environment = $environment 
    }       
    $results += New-Object PSObject -Property $details 

} 

ResponseTime 'app homepage' 'https://urlproduction', 'PRODUCTION' 
ResponseTime 'app homepage' 'https://urlQA', 'QA' 
ResponseTime 'app homepage' 'https://urltest', 'TEST' 

$results | export-csv -Path c:\so.csv -NoTypeInformation 

Answer 1

您在Powershell中遇到了一个常见问题。认为函数参数在定义中用逗号分隔，函数调用参数不是。应使用逗号，Powershell将这些项目转换为数组。

在这种特定情况

ResponseTime 'app homepage' 'https://urlproduction', 'PRODUCTION' 

被解析为

Call function ResponseTime with two paremters: 

'app homepage'和'https://urlproduction', 'PRODUCTION' - 其中后来是由两个元件的阵列。

在另一方面

ResponseTime 'app homepage' 'https://urlproduction' 'PRODUCTION' 

被解析为

Call function ResponseTime with three paremters: 

'app homepage'，'https://urlproduction'和'PRODUCTION'