从子脚本连接两个Azure Analysis Services时出现错误

问题描述

我正在使用PowerShell脚本。在这些脚本中，我有两个脚本，我正在与两个Azure Analysis Server一对一地连接。这些脚本由主脚本调用。我遇到错误

"Exception calling "Connect" with "1" argument(s): "Object reference not set to an instance of an object."

我的脚本代码在下面

Child1.ps1

param(
    [String]
    $envName1,[String]
    $toBedisconnect1
)

$loadInfo1 = [Reflection.Assembly]::LoadWithPartialName("Microsoft.analysisservices")
$server1 = New-Object Microsoft.analysisservices.Server

if($toBedisconnect1 -eq "No")
{
    $server1.Connect($envName1)
    return $server1
}
elseif($toBedisconnect1 -eq "Yes")
{
    $server1.disconnect()
    Write-Host $server1 " has been disconnected."
}

Child2.ps1

param(
    [String]
    $envName1,[String]
    $toBedisconnect1
)

$loadInfo1 = [Reflection.Assembly]::LoadWithPartialName("Microsoft.analysisservices")
$server1 = New-Object Microsoft.analysisservices.Server

if($toBedisconnect1 -eq "No")
{
    $server1.Connect($envName1)
    return $server1
}
elseif($toBedisconnect1 -eq "Yes")
{
    $server1.disconnect()
    Write-Host $server1 " has been disconnected."
}

MainParent.ps1

param(
    $filePath = "C:\Users\user1\Desktop\DBList.txt"
)

$command = "C:\Users\User1\Desktop\test1.ps1 –envName1 
asazure://aspaaseastus2.asazure.windows.net/mydevaas -toBedisconnect1 No"
$Obj1 = Invoke-Expression $command
Start-Sleep -Seconds 15

$command1 = "C:\Users\User1\Desktop\test2.ps1 –envName2 
asazure://aspaaseastus2.asazure.windows.net/myuataas -toBedisconnect2 No"
$Obj2 = Invoke-Expression $command1

MainParent.ps1中出现错误

 Exception calling "Connect" with "1" argument(s): "Object reference not set to an instance of an 
 object."
 At C:\Users\User1\Desktop\test1.ps1:13 char:5
 +     $server1.Connect($envName1)
 +     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
     + CategoryInfo          : NotSpecified: (:) [],MethodInvocationException
     + FullyQualifiedErrorId : NullReferenceException

 Exception calling "Connect" with "1" argument(s): "Object reference not set to an instance of an 
 object."
 At C:\Users\User1\Desktop\test2.ps1:13 char:5
        +     $server2.Connect($envName2)
        +     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
      + CategoryInfo          : NotSpecified: (:) [],MethodInvocationException
      + FullyQualifiedErrorId : NullReferenceException

我的AzureAnalysis Services dll版本为13.0.4495.10。我正在分享此信息，可能是一个问题。

解决方法

似乎Invoke-Expression没有通过参数envName1。我宁愿按如下方式正常调用子脚本：

$Obj1 = &"C:\Users\User1\Desktop\test1.ps1" -envName1 "asazure://aspaaseastus2.asazure.windows.net/mydevaas" -toBeDisconnect1 No | select -Last 1

$Obj2 = &"C:\Users\User1\Desktop\test2.ps1" -envName2 "asazure://aspaaseastus2.asazure.windows.net/myuataas" -toBeDisconnect2 No | select -Last 1

$command = "C:\Users\User1\Desktop\test1.ps1 –envName1 asazure://aspaaseastus2.asazure.windows.net/mydevaas -toBeDisconnect1 No"

仔细查看envName1之前的连字符。实际上是-（连字符）而不是-（连字符）。这就是未传递envName1的原因。第二个参数toBeDisconnect1正确。

如何知道区别？ -（连字符）短于–（连字符）：）

azure-analysis-services powershell powershell