更新ComboBox选择项目后
我迷路了，真的可以使用一些帮助。我正在尝试使用csv文件中的列名列表更新组合框（由打开文件按钮选择，字符串输入到文本框中）。
Function GetFileName($initialDirectory)
{
[System.Reflection.Assembly]::LoadWithPartialName("System.windows.forms") | Out-Null
$OpenFileDialog = New-Object System.Windows.Forms.OpenFileDialog
$OpenFileDialog.initialDirectory = $initialDirectory
$OpenFileDialog.filter = "CSV (*.csv)| *.csv"
$OpenFileDialog.multiselect = $false
$OpenFileDialog.ShowDialog() | Out-Null
return $OpenFileDialog.FileName
}
Function GetColumnsFromFile
{
Param ($fileWithPath)
[string]$csvFileColumnTitles = Get-Content $fileWithPath -totalcount 1
[String[]]$csvFileColumnTitles = ($csvFileColumnTitles -replace ",", "|").Trim()
[String[]]$csvFileColumnTitles = ($csvFileColumnTitles -replace "`"", "").Trim()
[String[]]$listOfColumnTitles = $csvFileColumnTitles.Split('|',[System.StringSplitOptions]::RemoveEmptyEntries)
return $listOfColumnTitles
}
Function GUIBox
{
# Creates GUI Box In Memory
[reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null
[reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.drawing
$Form = New-Object system.Windows.Forms.Form
$Form.Width = '1200'
$Form.Height = '800'
# TabControl
$TabControl = New-Object System.Windows.Forms.TabControl
$TabControl.Name = "TabControl"
$TabControl.TabIndex = 4
$TabControl.SelectedIndex = 0
$TabControl.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 0
$System_Drawing_Point.Y = 50
$TabControl.Location = $System_Drawing_Point
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 685
$System_Drawing_Size.Width = 1184
$TabControl.Size = $System_Drawing_Size
$Form.Controls.Add($TabControl)
# Test 1 Tab
$Test1_Tab = New-Object System.Windows.Forms.TabPage
$Test1_Tab.DataBindings.DefaultDataSourceUpdateMode = 0
$Test1_Tab.Name = "Test 1"
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 0
$System_Drawing_Point.Y = 50
$Test1_Tab.Location = $System_Drawing_Point
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 685
$System_Drawing_Size.Width = 1184
$Test1_Tab.Size = $System_Drawing_Size
$Test1_Tab.TabIndex = 1
$Test1_Tab.Text = "Test 1"
$Test1_Tab.UseVisualStyleBackColor = $True
$TabControl.Controls.Add($Test1_Tab)
# Open File Label
$SelectSourceFile_Label = New-Object System.Windows.Forms.Label
$SelectSourceFile_Label.Location = "10, 30"
$SelectSourceFile_Label.Name = "label"
$SelectSourceFile_Label.Size = "120, 20"
$SelectSourceFile_Label.TabIndex = 3
$SelectSourceFile_Label.Text = "Select Source File"
$Test1_Tab.Controls.Add($SelectSourceFile_Label)
# Open File Textbox
$SelectSourceFile_Textbox = New-Object System.Windows.Forms.TextBox
$SelectSourceFile_Textbox.Location = '10, 50'
$SelectSourceFile_Textbox.Size = '200, 20'
$SelectSourceFile_Textbox.TabIndex = 3
$SelectSourceFile_Textbox.Text = $Test1_FileInput_Textbox_String
$Test1_Tab.Controls.Add($SelectSourceFile_Textbox)
# Open File Button
$SelectSourceFile_Button = New-Object System.Windows.Forms.Button
$SelectSourceFile_Button.DialogResult = 'None'
$SelectSourceFile_Button.Location = '210, 50'
$SelectSourceFile_Button.Name = 'Open File Button'
$SelectSourceFile_Button.Size = '75, 25'
$SelectSourceFile_Button.TabIndex = 3
$SelectSourceFile_Button.Text = 'Open File'
$SelectSourceFile_Button.UseVisualStyleBackColor = $true
$SelectSourceFile_Button_Click = {$SelectSourceFile_Textbox.Text = GetFileName}
$SelectSourceFile_Button.add_Click($SelectSourceFile_Button_Click)
$Test1_Tab.Controls.Add($SelectSourceFile_Button)
# Select Open File Columns Label
$SelectSourceFileColumn_Label = New-Object System.Windows.Forms.Label
$SelectSourceFileColumn_Label.Location = "10, 90"
$SelectSourceFileColumn_Label.Name = "label"
$SelectSourceFileColumn_Label.Size = "150, 20"
$SelectSourceFileColumn_Label.TabIndex = 3
$SelectSourceFileColumn_Label.Text = "Select Source File Column"
$Test1_Tab.Controls.Add($SelectSourceFileColumn_Label)
# Select Open File Columns Dropdown
[String[]]$ColumnList = GetColumnsFromFile 'C:\Scripts\Tests\1Project\Test.csv'
Write-Host '$ColumnList =' $ColumnList
$SelectSourceFileColumn_Dropdown = New-Object 'System.Windows.Forms.ComboBox'
$SelectSourceFileColumn_Dropdown.FormattingEnabled = $True
$SelectSourceFileColumn_Dropdown.Location = '10, 110'
$SelectSourceFileColumn_Dropdown.Name = 'File Column'
$SelectSourceFileColumn_Dropdown.Size = '200, 20'
$SelectSourceFileColumn_Dropdown.TabIndex = 3
$SelectSourceFileColumn_Dropdown.Height = 30
$Test1_Tab.Controls.Add($SelectSourceFileColumn_Dropdown)
## Display GUI Box ##
$Form.ShowDialog()
}
GUIBox
csv文件......
"ColumnOne","ColumnTwo","ColumnThree"
"ColumnOneValueOne","ColumnTwoValueOne","ColumnThreeValueOne"
"ColumnOneValueTwo","ColumnTwoValueTwo","ColumnThreeValueTwo"
"ColumnOneValueThree","ColumnTwoValueThree","ColumnThreeValueThree"
因此在powershell窗口中，我们可以看到它能够打印3列名称。我知道如果我尝试这一行[String[]]$ColumnList = GetColumnsFromFile $SelectSourceFile_Textbox.Text（替换第110行），它将会出错（因为它会在用户有机会输入所选文件之前迭代这一行）。那么在用户输入csv文件后，如何更新组合框（带有csv文件中的列名）？
1 个答案:
答案 0 :(得分：1)
您可以这样做的一种方法是使用按钮点击显示FolderBrowserDialog，如果您从中获取文件名，请获取标题并将每个标题添加到组合框中。
当用户通过创建TextChanged事件键入文本框时，您可以使用相同的技术填充ComboBox。
我使用以下代码完成了这项工作：
function GUIBox {
#----------------------------------------------
#region Import the Assemblies
#----------------------------------------------
[void][reflection.assembly]::Load('System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089')
[void][reflection.assembly]::Load('System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089')
[void][reflection.assembly]::Load('System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a')
[void][reflection.assembly]::Load('System.DirectoryServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a')
[void][reflection.assembly]::Load('System.ServiceProcess, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a')
#endregion Import Assemblies
#----------------------------------------------
#region Generated Form Objects
#----------------------------------------------
[System.Windows.Forms.Application]::EnableVisualStyles()
$form1 = New-Object 'System.Windows.Forms.Form'
$textbox1 = New-Object 'System.Windows.Forms.TextBox'
$combobox1 = New-Object 'System.Windows.Forms.ComboBox'
$buttonLoadCsv = New-Object 'System.Windows.Forms.Button'
$InitialFormWindowState = New-Object 'System.Windows.Forms.FormWindowState'
#endregion Generated Form Objects
#----------------------------------------------
# User Generated Script
#----------------------------------------------
function Get-FileName($initialDirectory)
{
[System.Reflection.Assembly]::LoadWithPartialName("System.windows.forms") | Out-Null
$OpenFileDialog = New-Object System.Windows.Forms.OpenFileDialog
$OpenFileDialog.initialDirectory = $initialDirectory
$OpenFileDialog.filter = "CSV (*.csv)| *.csv"
$OpenFileDialog.multiselect = $false
$OpenFileDialog.ShowDialog() | Out-Null
return $OpenFileDialog.FileName
}
$form1_Load={
#TODO: Initialize Form Controls here
}
$buttonLoadCsv_Click={
#TODO: Place custom script here
$file = Get-FileName -initialDirectory $env:USERPROFILE
if ($file)
{
$textbox1.Text = $file
try
{
$headers = Import-Csv -Path $file | Get-Member | Where-Object -FilterScript {$_.MemberType -eq 'NoteProperty'} | Select-Object -ExpandProperty Name -Unique
Write-Host ($headers | Out-String)
$combobox1.Items.Clear()
foreach($header in $headers)
{
$combobox1.Items.Add($header)
}
}
catch
{
Write-Warning -Message "The following error occured while trying to get the headings for csv file $file`: $($_.Exception.Message)"
}
}
}
# --End User Generated Script--
#----------------------------------------------
#region Generated Events
#----------------------------------------------
$Form_StateCorrection_Load=
{
#Correct the initial state of the form to prevent the .Net maximized form issue
$form1.WindowState = $InitialFormWindowState
}
$Form_Cleanup_FormClosed=
{
#Remove all event handlers from the controls
try
{
$buttonLoadCsv.remove_Click($buttonLoadCsv_Click)
$form1.remove_Load($form1_Load)
$form1.remove_Load($Form_StateCorrection_Load)
$form1.remove_FormClosed($Form_Cleanup_FormClosed)
}
catch [Exception]
{ }
}
#endregion Generated Events
#----------------------------------------------
#region Generated Form Code
#----------------------------------------------
$form1.SuspendLayout()
#
# form1
#
$form1.Controls.Add($textbox1)
$form1.Controls.Add($combobox1)
$form1.Controls.Add($buttonLoadCsv)
$form1.ClientSize = '390, 76'
$form1.Name = 'form1'
$form1.Text = 'Form'
$form1.add_Load($form1_Load)
#
# textbox1
#
$textbox1.Location = '12, 14'
$textbox1.Name = 'textbox1'
$textbox1.Size = '284, 20'
$textbox1.TabIndex = 2
#
# combobox1
#
$combobox1.DropDownStyle = 'DropDownList'
$combobox1.FormattingEnabled = $True
$combobox1.Location = '12, 40'
$combobox1.Name = 'combobox1'
$combobox1.Size = '284, 21'
$combobox1.TabIndex = 1
#
# buttonLoadCsv
#
$buttonLoadCsv.Location = '302, 12'
$buttonLoadCsv.Name = 'buttonLoadCsv'
$buttonLoadCsv.Size = '75, 49'
$buttonLoadCsv.TabIndex = 0
$buttonLoadCsv.Text = 'Load Csv'
$buttonLoadCsv.UseVisualStyleBackColor = $True
$buttonLoadCsv.add_Click($buttonLoadCsv_Click)
$form1.ResumeLayout()
#endregion Generated Form Code
#----------------------------------------------
#Save the initial state of the form
$InitialFormWindowState = $form1.WindowState
#Init the OnLoad event to correct the initial state of the form
$form1.add_Load($Form_StateCorrection_Load)
#Clean up the control events
$form1.add_FormClosed($Form_Cleanup_FormClosed)
#Show the Form
return $form1.ShowDialog()
} #End Function
#Call the form
GUIBox | Out-Null
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