functions/Show-DbaDatabaseList.ps1

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function Show-DbaDatabaseList {
    <#
  .SYNOPSIS
   Shows a list of databases in a GUI.
    
  .DESCRIPTION
   Shows a list of databases in a GUI. Returns a string holding the name of the selected database. Hitting cancel returns null.
    
        .PARAMETER SqlInstance
            The SQL Server Instance to connect to..
         
  .PARAMETER SqlCredential
   Allows you to login to servers using SQL Logins instead of Windows Authentication (AKA Integrated or Trusted). To use:
 
   $scred = Get-Credential, then pass $scred object to the -SourceSqlCredential parameter.
 
   Windows Authentication will be used if SourceSqlCredential is not specified. SQL Server does not accept Windows credentials being passed as credentials.
 
   To connect as a different Windows user, run PowerShell as that user.        
   
  .PARAMETER Title
   Title of the window being displayed. Default is "Select Database".
    
  .PARAMETER Header
   Header text displayed above the database listing. Default is "Select the database:".
    
  .PARAMETER DefaultDb
   Specify a database to have selected when the window appears.
 
  .NOTES
   Website: https://dbatools.io
   Copyright: (C) Chrissy LeMaire, clemaire@gmail.com
   License: GNU GPL v3 https://opensource.org/licenses/GPL-3.0
 
  .LINK
   https://dbatools.io/Show-DbaDatabaseList
 
  .EXAMPLE
   Show-DbaDatabaseList -SqlInstance sqlserver2014a
 
   Shows a GUI list of databases using Windows Authentication to connect to the SQL Server. Returns a string of the selected database.
    
  .EXAMPLE
   Show-DbaDatabaseList -Source sqlserver2014a -SqlCredential $cred
 
   Shows a GUI list of databases using SQL credentials to connect to the SQL Server. Returns a string of the selected database.
   
 #>

    [CmdletBinding()]
    Param (
        [parameter(Mandatory = $true, ValueFromPipeline = $true)]
        [Alias("ServerInstance", "SqlServer")]
        [DbaInstanceParameter]$SqlInstance,
        [object]$SqlCredential,
        [string]$Title = "Select Database",
        [string]$Header = "Select the database:",
        [string]$DefaultDb
    )
    
    begin {
        try {
            Add-Type -AssemblyName PresentationFramework
        }
        catch {
            throw "Windows Presentation Framework required but not installed"
        }
        
        function Add-TreeItem {
            Param (
                [string]$name,
                [object]$parent,
                [string]$tag
            )
            
            $childitem = New-Object System.Windows.Controls.TreeViewItem
            $textblock = New-Object System.Windows.Controls.TextBlock
            $textblock.Margin = "5,0"
            $stackpanel = New-Object System.Windows.Controls.StackPanel
            $stackpanel.Orientation = "Horizontal"
            $image = New-Object System.Windows.Controls.Image
            $image.Height = 20
            $image.Width = 20
            $image.Stretch = "Fill"
            $image.Source = $dbicon
            $textblock.Text = $name
            $childitem.Tag = $name
            
            if ($name -eq $DefaultDb) {
                $childitem.IsSelected = $true
                $script:selected = $name
            }
            
            [void]$stackpanel.Children.Add($image)
            [void]$stackpanel.Children.Add($textblock)
            
            $childitem.Header = $stackpanel
            [void]$parent.Items.Add($childitem)
        }
    
        function Convert-b64toimg {
            param ($base64)
            
            $bitmap = New-Object System.Windows.Media.Imaging.BitmapImage
            $bitmap.BeginInit()
            $bitmap.StreamSource = [System.IO.MemoryStream][System.Convert]::FromBase64String($base64)
            $bitmap.EndInit()
            $bitmap.Freeze()
            return $bitmap
        }
        
        $dbicon = Convert-b64toimg "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"
        $foldericon = Convert-b64toimg "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"
        $dbatoolsicon = Convert-b64toimg "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"
        
        $sourceserver = Connect-SqlInstance -SqlInstance $SqlInstance -SqlCredential $SourceSqlCredential
    }
    
    process {
        # Create XAML form in Visual Studio, ensuring the ListView looks chromeless
        [xml]$xaml = "<Window
  xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'
  xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
        Title='$Title' SizeToContent='WidthAndHeight' Background='#F0F0F0'
  WindowStartupLocation='CenterScreen' MaxHeight='600'>
    <Grid>
        <TreeView Name='treeview' Height='Auto' Width='Auto' Background='#FFFFFF' BorderBrush='#FFFFFF' Foreground='#FFFFFF' Margin='11,36,11,79'/>
        <Label x:Name='label' Content='$header' HorizontalAlignment='Left' Margin='15,4,10,0' VerticalAlignment='Top'/>
        <StackPanel HorizontalAlignment='Right' Orientation='Horizontal' VerticalAlignment='Bottom' Margin='0,50,10,30'>
  <Button Name='okbutton' Content='OK' Margin='0,0,0,0' Width='75'/>
  <Label Width='10'/>
        <Button Name='cancelbutton' Content='Cancel' Margin='0,0,0,0' Width='75'/>
    </StackPanel>
</Grid>
</Window>"

        #second pushes it down
        # Turn XAML into PowerShell objects
        $window = [Windows.Markup.XamlReader]::Load((New-Object System.Xml.XmlNodeReader $xaml))
        $window.icon = $dbatoolsicon
        
        $xaml.SelectNodes("//*[@Name]") | ForEach-Object { Set-Variable -Name ($_.Name) -Value $window.FindName($_.Name) -Scope Script }
        
        $childitem = New-Object System.Windows.Controls.TreeViewItem
        $textblock = New-Object System.Windows.Controls.TextBlock
        $textblock.Margin = "5,0"
        $stackpanel = New-Object System.Windows.Controls.StackPanel
        $stackpanel.Orientation = "Horizontal"
        $image = New-Object System.Windows.Controls.Image
        $image.Height = 20
        $image.Width = 20
        $image.Stretch = "Fill"
        $image.Source = $foldericon
        $textblock.Text = "Databases"
        $childitem.Tag = "Databases"
        $childitem.isExpanded = $true
        [void]$stackpanel.Children.Add($image)
        [void]$stackpanel.Children.Add($textblock)
        $childitem.Header = $stackpanel
        $databaseParent = $treeview.Items.Add($childitem)
        
        try {
            $databases = $sourceserver.databases.name
        }
        catch {
            return
        }
        
        foreach ($database in $databases) {
            Add-TreeItem -Name $database -Parent $childitem -Tag $nameSpace
        }
        
        $okbutton.Add_Click( {
                $window.Close()
                $script:okay = $true
            })
        
        $cancelbutton.Add_Click( {
                $script:selected = $null
                $window.Close()
            })
        
        $window.Add_SourceInitialized( {
                [System.Windows.RoutedEventHandler]$Event = {
                    if ($_.OriginalSource -is [System.Windows.Controls.TreeViewItem]) {
                        $script:selected = $_.OriginalSource.Tag
                    }
                }
                $treeview.AddHandler([System.Windows.Controls.TreeViewItem]::SelectedEvent, $Event)
            })
        
        $null = $window.ShowDialog()
    }
    
    end {
        if ($script:selected.length -gt 0 -and $script:okay -eq $true) {
            return $script:selected
        }
        
        Test-DbaDeprecation -DeprecatedOn "1.0.0" -Silent:$false -Alias Show-SqlDatabaseList
    }
}