Function 从powershell打开的自定义浏览器出现问题

在我的GUI中，我有一个按钮，可以打开自定义创建的AD浏览器（类似于dsa.msc的左面板）。我创建了一个按钮来打开它，我想在按钮旁边的文本框中显示所选路径。我有两个问题，一个小问题，一个大问题。小问题是，浏览器在GUI本身之前自动打开（但这只是一个麻烦，没什么大不了的，我甚至可以假装它是这样工作的：-）。更大的、主要的问题是，当我在GUI中单击按钮并从最初打开的文本框中选择另一个路径时，路径没有改变。浏览器中的“确定”按钮更像是“取消”。以下是文本框的定义方式：

$Location_val                    = New-Object system.Windows.Forms.TextBox
$Location_val.multiline          = $false
$Location_val.text               = Browse-AD
$Location_val.width              = 250
$Location_val.height             = 20
$Location_val.location           = New-Object System.Drawing.Point(200,160)

这是创建浏览器的函数的定义：

function Browse-AD()
{
    # original inspiration: https://itmicah.wordpress.com/2013/10/29/active-directory-ou-picker-in-powershell/
    # author: Rene Horn the.rhorn@gmail.com

<#
    Copyright (c) 2015, Rene Horn
    All rights reserved.

    Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
    3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#>

    $dc_hash = @{}
    $selected_ou = $null

    Import-Module ActiveDirectory
    $forest = Get-ADForest

    [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing") | Out-Null
    [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms") | Out-Null

    function Get-NodeInfo($sender, $dn_textbox)
    {
        $selected_node = $sender.Node
        $dn_textbox.Text = $selected_node.Name
    }

    function Add-ChildNodes($sender)
    {
        $expanded_node = $sender.Node

        if ($expanded_node.Name -eq "root") {
            return
        }

        $expanded_node.Nodes.Clear() | Out-Null

        $dc_hostname = $dc_hash[$($expanded_node.Name -replace '(OU=[^,]+,)*((DC=\w+,?)+)','$2')]

        $child_OUs = Get-ADObject -Server $dc_hostname -Filter 'ObjectClass -eq "organizationalUnit" -or ObjectClass -eq "container"' -SearchScope OneLevel -SearchBase $expanded_node.Name

        if($child_OUs -eq $null) {
            $sender.Cancel = $true
        } else {
            foreach($ou in $child_OUs) {
                $ou_node = New-Object Windows.Forms.TreeNode
                $ou_node.Text = $ou.Name
                $ou_node.Name = $ou.DistinguishedName
                $ou_node.Nodes.Add('') | Out-Null
                $expanded_node.Nodes.Add($ou_node) | Out-Null
            }
        }
    }

    function Add-ForestNodes($forest, [ref]$dc_hash)
    {
        $ad_root_node = New-Object Windows.Forms.TreeNode
        $ad_root_node.Text = $forest.RootDomain
        $ad_root_node.Name = "root"
        $ad_root_node.Expand()

        $i = 1
        foreach ($ad_domain in $forest.Domains) {
            Write-Progress -Activity "Querying AD forest for domains and hostnames..." -Status $ad_domain -PercentComplete ($i++ / $forest.Domains.Count * 100)

            $dc = Get-ADDomainController -Server $ad_domain
            $dn = $dc.DefaultPartition
            $dc_hash.Value.Add($dn, $dc.Hostname)
            $dc_node = New-Object Windows.Forms.TreeNode
            $dc_node.Name = $dn
            $dc_node.Text = $dc.Domain
            $dc_node.Nodes.Add("") | Out-Null
            $ad_root_node.Nodes.Add($dc_node) | Out-Null
        }

        return $ad_root_node
    }

    $main_dlg_box = New-Object System.Windows.Forms.Form
    $main_dlg_box.ClientSize = New-Object System.Drawing.Size(400,600)
    $main_dlg_box.MaximizeBox = $false
    $main_dlg_box.MinimizeBox = $false
    $main_dlg_box.FormBorderStyle = 'FixedSingle'

    # widget size and location variables
    $ctrl_width_col = $main_dlg_box.ClientSize.Width/20
    $ctrl_height_row = $main_dlg_box.ClientSize.Height/15
    $max_ctrl_width = $main_dlg_box.ClientSize.Width - $ctrl_width_col*2
    $max_ctrl_height = $main_dlg_box.ClientSize.Height - $ctrl_height_row
    $right_edge_x = $max_ctrl_width
    $left_edge_x = $ctrl_width_col
    $bottom_edge_y = $max_ctrl_height
    $top_edge_y = $ctrl_height_row

    # setup text box showing the distinguished name of the currently selected node
    $dn_text_box = New-Object System.Windows.Forms.TextBox
    # can not set the height for a single line text box, that's controlled by the font being used
    $dn_text_box.Width = (14 * $ctrl_width_col)
    $dn_text_box.Location = New-Object System.Drawing.Point($left_edge_x, ($bottom_edge_y - $dn_text_box.Height))
    $main_dlg_box.Controls.Add($dn_text_box)
    # /text box for dN

    # setup Ok button
    $ok_button = New-Object System.Windows.Forms.Button
    $ok_button.Size = New-Object System.Drawing.Size(($ctrl_width_col * 2), $dn_text_box.Height)
    $ok_button.Location = New-Object System.Drawing.Point(($right_edge_x - $ok_button.Width), ($bottom_edge_y - $ok_button.Height))
    $ok_button.Text = "Ok"
    $ok_button.DialogResult = 'OK'
    $main_dlg_box.Controls.Add($ok_button)
    # /Ok button

    # setup tree selector showing the domains
    $ad_tree_view = New-Object System.Windows.Forms.TreeView
    $ad_tree_view.Size = New-Object System.Drawing.Size($max_ctrl_width, ($max_ctrl_height - $dn_text_box.Height - $ctrl_height_row*1.5))
    $ad_tree_view.Location = New-Object System.Drawing.Point($left_edge_x, $top_edge_y)
    $ad_tree_view.Nodes.Add($(Add-ForestNodes $forest ([ref]$dc_hash))) | Out-Null
    $ad_tree_view.Add_BeforeExpand({Add-ChildNodes $_})
    $ad_tree_view.Add_AfterSelect({Get-NodeInfo $_ $dn_text_box})
    $main_dlg_box.Controls.Add($ad_tree_view)
    # /tree selector

    $main_dlg_box.ShowDialog() | Out-Null

    return  $dn_text_box.Text
}

$Select_AD_path                  = New-Object System.Windows.Forms.Button
$Select_AD_path.Text             = "Browse..."
$Select_AD_path.Width            = 100
$Select_AD_path.Height           = 30
$Select_AD_path.Location         = New-Object System.Drawing.Point(90,155)
$Select_AD_path.Font             = 'Microsoft Sans Serif,10'
$Select_AD_path.add_Click(${function:Browse-AD})

---

我怎样才能更好地实现我想要的？我最多只想在文本框中用一些预定义的值打开GUI，如果需要，我可以使用浏览器更改这些值。

需要进行一些更改，以解决这两个问题：

• 更改

  $Location\u val

  的初始值：

• 更改单击事件处理程序：

• 更改浏览广告功能的最后几行：

$Location_val.text = ""

$Select_AD_path.add_Click({
    $dn = Browse-AD
    if ($dn) 
    {
        $Location_val.Text = $dn
    }
})

...
    if ($main_dlg_box.ShowDialog() -eq [System.Windows.Forms.DialogResult]::Ok)
    {
        return $dn_text_box.Text
    }

    return $null
}