Powershell 单行数据表 return 填充组合框

Question

我正在使用 Powershell v4.0。我在我的 UI 上有一个下拉菜单，我正在用我的数据库中的数据填充它。我调用了一个像这样获取数据的函数：

$ConfigDynamicContractID.ItemsSource = (GetDynamicContracts).DefaultView

在后端看起来像这样：

function GetDynamicContracts{
    $ContractQuery = "select con.ContractNumber as Name, c.ContractID from foo..campaign c inner join foo..campaigntemplate ct on c.campaignid = ct.campaignid
inner join foo..template t on ct.templateid = t.templateid inner join bar..contracts con on con.ContractID = c.ContractID 
    where c.ProductType = 'INTRO' and t.FileName = 'Intro Dynamic Template' and c.DeleteFlag = 0"

    $ContractResult = ExecuteSelect "Bar" $ContractQuery
    return , $ContractResult
}

这段代码工作正常。然后我被告知上面引用的表不能相互通信，所以我必须对每个表进行单独调用并在 powershell 中进行过滤。所以这是我的代码：

function GetDynamicContracts{

    $CampaignQuery = "Select c.* From foo..Campaign c join foo..CampaignTemplate ct on c.CampaignID = ct.CampaignID
                    join foo..Template t on ct.TemplateID = t.TemplateID
                    Where c.ProductType = 'INTRO' and t.FileName = 'Intro Dynamic Template' and c.DeleteFlag = 0"
    $CampaignResults = ExecuteSelect "foo" $CampaignQuery

    $ContractIDs = New-Object System.Collections.ArrayList

    foreach($row in $CampaignResults.Rows){
        $ContractIDs.Add($row.ContractID)
    }
    $ContractIDs = $ContractIDs -join ","

    $PHQuery = "Select ContractID, ContractNumber as Name From Contracts Where ContractID in ($ContractIDs)"
    $PHResults = ExecuteSelect "Bar" $PHQuery

    #Log $MyInvocation.MyCommand $PSBoundParameters
    return ,$PHResults
}

由于某种原因，此代码在返回单行时不起作用。但是如果我把这个函数调用分成两个独立的部分，那么它就可以工作了。见下文：

function GetDynamicContracts{

    $ContractIDs = GetDynamicCampaign
    $ContractIDs = $ContractIDs[1]

    $PHQuery = "Select ContractID, ContractNumber as Name From Contracts Where ContractID in ($ContractIDs)"
    $PHResults = ExecuteSelect "PhytelMaster" $PHQuery

    Log $MyInvocation.MyCommand $PSBoundParameters
    return ,$PHResults
}

function GetDynamicCampaign{

    $CampaignQuery = "Select c.* From Campaign..Campaign c join Campaign..CampaignTemplate ct on c.CampaignID = ct.CampaignID
                    join Campaign..Template t on ct.TemplateID = t.TemplateID
                    Where c.ProductType = 'INTRO' and t.FileName = 'Intro Dynamic Template' and c.DeleteFlag = 0"
    $CampaignResults = ExecuteSelect "Campaign" $CampaignQuery

    $ContractIDs = New-Object System.Collections.ArrayList
    foreach($row in $CampaignResults.Rows){
        $ContractIDs.Add($row.ContractID)
    }
    $ContractIDs = $ContractIDs -join ","

    return $ContractIDs
}

似乎在单个函数中进行两次执行选择会导致“,”在返回数据时无法执行其操作。谁能解释为什么？？提前致谢，因为我有解决方法，所以不用着急。

Answer 1

正如@TheMadTechnician 和@wOxxOm 指出的那样，ArrayList 将索引垃圾邮件发送到 return 和 return，returns 函数中的所有垃圾邮件。因此，当我期望 $PHResults 时，我也收到了 ArrayList 垃圾邮件。我可以使用 ArrayList 以外的其他东西，或者我还发现，如果我将我的函数代码包装在 $null = @{ 'Code' } 中，然后 return 我想要的变量，我得到的只是那个变量。它很丑，但它有效。

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