public/New-OledbConnection.ps1
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function New-OledbConnection { <# .SYNOPSIS Returns a new System.Data.OleDb.OleDbConnection object. .DESCRIPTION Returns a new System.Data.OleDb.OleDbConnection object given a connection string or alias found in a file. Defaults to Module_Root\SQLConnections.txt. Queries the user for input when a connection string has parameters specified between percent signs are found, %Example Parameter%. .PARAMETER ConnectionString Any valid OleDB connection string. Prompts a user for input if a paramter specified between percent signs is found, %Example Parameter%. .PARAMETER List List the alias names and their connection string values found in the connection file. .PARAMETER File File used for resolving aliases to the full connection string. Defaults to SQLConnections.txt. .OUTPUTS System.Data.OleDb.OleDbConnection .NOTES SEE ALSO about_OledbSql #> [CmdletBinding( DefaultParameterSetName="receive" )] [OutputType([System.Data.OleDb.OleDbConnection])] param( [Parameter( Mandatory=$true, ParameterSetName="receive", ValueFromPipeline=$true, Position=0, HelpMessage='Enter an OLEDB connection string' )] [String]$ConnectionString, [Parameter( ParameterSetName="give" )] [Switch]$List, [String]$File = (Join-Path $PSScriptRoot Connections.txt) ) <# Parse optional connection string file with the following format: # Comment alias OleDB Connection String #> $connectionRegex = "^\s*(?<Alias>[^#]\w+)\s+(?<ConnectionString>.+)$" $Connections = @{} if (Test-Path $File) { Get-Content $File | Where-Object { $_ -match $connectionRegex } | ForEach-Object { $Connections[$Matches['Alias']] = $Matches['ConnectionString'] } } if ($PsCmdlet.ParameterSetName -eq 'give' -and $List) { return $Connections } # Query user to replace any %variables% if ($Connections -is [Hashtable] -and $Connections.ContainsKey($ConnectionString)) { $ConnectionString = $Connections.Item($ConnectionString) } while ($ConnectionString -match "%([^%\s][^%]*)%") { $ConnectionString = $ConnectionString -replace $Matches[0],$(Read-Host $Matches[1]) } if (-not $ConnectionString) { throw "No OleDB connection string specified." } Write-Verbose "Connection string: $ConnectionString" new-object System.Data.OleDb.OleDbConnection -ArgumentList $ConnectionString } |