Question

我有一个powershell脚本，它接受我打算用来执行存储过程的用户输入。 sproc接受多个参数来自定义返回的数据。但是，当我运行此PowerShell代码时，我收到以下错误：

Cannot index into a null array.
At C:\Report.ps1:119 char:42
+     foreach ($Row in $global:DataSet.Tables[ <<<< 0].Rows)
+ CategoryInfo          : InvalidOperation: (0:Int32) [], RuntimeException
+ FullyQualifiedErrorId : NullArray

这是我用来执行对存储过程的调用的powershell代码。

# Create Shared Helper Objects
$nl = [Environment]::NewLine

function msg
{
    param($message,$fgcolor="white",$bgcolor="black")
    $output = Write-Host $message -ForegroundColor $fgcolor -BackgroundColor $bgcolor
    write-output $output
}
Set-Location "C:\"

$month = Read-Host "Enter Report Month"
$year = Read-Host "Enter Report Year"
msg "$nl Choose a product" "White"
$prompt = ' [D] Desktop  [M] Mobile'
switch (Read-Host $prompt) {
"D" {$product = "Desktop"; break}
"M" {$product = "Mobile"; break}
}
msg "$nl Select a Make" "White"
$prompt = ' [F] First [L] Last '
switch (Read-Host $prompt) {
"F" {$SiteMake = "First"; break}
"L" {$SiteMake = "Last"; break}
}
msg "$nl Select a Product" "White"
$prompt = ' [E] Extra [B] Basic'
switch (Read-Host $prompt) {
"E" {$SitePackage = "Extra"; break}
"B" {$SitePackage = "Basic"; break}
}

# Create Database Connection Function
function ConnectSproc
{
param ($SQLServer, $SQLDBName, $SqlQuery)
$SqlConnection = New-Object System.Data.SqlClient.SqlConnection  
$SqlConnection.ConnectionString = "Server = $SQLServer; Database = $SQLDBName; Integrated Security = True"  
$SqlCmd = New-Object System.Data.SqlClient.SqlCommand  
$SqlCmd.CommandText = $SqlQuery
$SqlCmd.CommandType = [System.Data.CommandType]::StoredProcedure
    # Report Month
    $SqlCmd.Parameters.Add("@ReportMonth",[system.data.SqlDbType]::VarChar) | out-Null
    $SqlCmd.Parameters["@ReportMonth"].Direction = [system.data.ParameterDirection]::Input
    $SqlCmd.Parameters["@ReportMonth"].value = $month
    # Report Year
    $SqlCmd.Parameters.Add("@ReportYear",[system.data.SqlDbType]::VarChar) | out-Null
    $SqlCmd.Parameters["@ReportYear"].Direction = [system.data.ParameterDirection]::Input
    $SqlCmd.Parameters["@ReportYear"].value = $year
    # Product
    $SqlCmd.Parameters.Add("@Product",[system.data.SqlDbType]::VarChar) | out-Null
    $SqlCmd.Parameters["@Product"].Direction = [system.data.ParameterDirection]::Input
    $SqlCmd.Parameters["@Product"].value = $product
    # Site Make
    $SqlCmd.Parameters.Add("@SiteMake",[system.data.SqlDbType]::VarChar) | out-Null
    $SqlCmd.Parameters["@SiteMake"].Direction = [system.data.ParameterDirection]::Input
    $SqlCmd.Parameters["@SiteMake"].value = $SiteMake
    # Site Package
    $SqlCmd.Parameters.Add("@SitePackage",[system.data.SqlDbType]::VarChar) | out-Null
    $SqlCmd.Parameters["@SitePackage"].Direction = [system.data.ParameterDirection]::Input
    $SqlCmd.Parameters["@SitePackage"].value = $SitePackage
$SqlCmd.Connection = $SqlConnection  
$SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter  
$SqlAdapter.SelectCommand = $SqlCmd  
$DataSet = New-Object System.Data.DataSet  
$SqlAdapter.Fill($DataSet) | Out-Null  
$SqlConnection.Close()  
$DataSet.Tables[0]
}

ConnectSproc "servername" "databasename" "mysproc"

我很茫然。任何帮助将不胜感激！

更新：它实际上看起来程序甚至没有正确执行。这可能解释了我得到的错误。现在我不确定为什么sproc没有执行。

Answer 1

我明白了。它最终成为一个范围问题，在函数内部创建了$ DataSet变量，并且没有前缀“$ global：”

为了解决这个问题，我改变了

$DataSet = New-Object System.Data.DataSet到$global:DataSet = New-Object System.Data.DataSet并在函数外引用它为$global:DataSet.Tables[0]。

Answer 2

可能对Fill()的调用失败了。暂时注释掉| Out_Null的{{1}}部分，看看是否有任何消息。

在Powershell中执行存储过程时出错

2 个答案: