I’m filling two textfields with filepaths after I chose an input-file. I want the textfield to still be editable, so that the name of the ouput file can be changed, e.g. if the file already exists. The textfields are writable before a file is chosen, but not anymore after that. I checked the ReadOnly property, but it’s set to false at all times.

The behavior happens when I click nothing else, so I can’t imagine another part of the code interferes with the TextBox.

This doesn’t occur with a normal TextBox, but those are ugly 🙂

Part of my code:

# Create a Select Input TextBox
$SelectInputTextField = New-Object System.Windows.Forms.RichTextBox
$SelectInputTextField.Location = New-Object System.Drawing.Point([int]($spacer*2+$commonElementWidth), $spacer)
$SelectInputTextField.AutoSize = $false
$SelectInputTextField.Size = New-Object System.Drawing.Size($widerElementWidth, $commonElementHeight)
$SelectInputTextField.BackColor = "#FFFFFF"
$SelectInputTextField.Font = New-Object System.Drawing.Font("Arial", 14)
$SelectInputTextField.WordWrap = $false
$SelectInputTextField.ReadOnly = $false
$form.Controls.Add($SelectInputTextField)

# Create a Select Input Button
$SelectInputButton = New-Object System.Windows.Forms.Button
$SelectInputButton.Location = New-Object System.Drawing.Point([int]($spacer*3+$commonElementWidth+$widerElementWidth), $spacer)
$SelectInputButton.Size = New-Object System.Drawing.Size($commonElementWidth, $commonElementHeight)
$SelectInputButton.Text = "Open"
$SelectInputButton.Add_Click({
    $openFileDialog = New-Object System.Windows.Forms.OpenFileDialog
    $openFileDialog.Title = "Select Input File"
    $openFileDialog.Filter = "Text Files (*.txt)|*.txt|All Files (*.*)|*.*"
    $openFileDialog.InitialDirectory = $PSScriptRoot
    if ($openFileDialog.ShowDialog() -eq [System.Windows.Forms.DialogResult]::OK) {
        $SelectInputTextField.Text = $openFileDialog.FileName
        $outputFilePath = [System.IO.Path]::GetDirectoryName($openFileDialog.FileName) + "SQL-Code.txt"
        $SelectOutputTextField.Text = $outputFilePath
        $SelectInputTextField.Select($SelectInputTextField.Text.Length, 0)
        $SelectInputTextField.ScrollToCaret()
        $SelectInputTextField.ReadOnly = $false
        $SelectOutputTextField.Select($SelectOutputTextField.Text.Length, 0)
        $SelectOutputTextField.ScrollToCaret()
        $SelectOutputTextField.ReadOnly = $false
    }
})
$form.Controls.Add($SelectInputButton)