CODEWITHSUNDEEP
c#wpf
methuselah
methuselah

Reputation: 13206

Passing textbox currently in focus

I have a application with 4 textbox controls: TotalTextBox, PaidTextBox, RemainingTextBox and DriverTextBox.

How do I pass through the current textbox in focus by the user (only if it is not DriverTextBox, i.e. only from TotalTextBox, PaidTextBox, RemainingTextBox)?

On program launch it should focus on the TotalTextBox control. I have also implemented a try/catch so that it only defaults back to focusing on the TotalTextBox control.

This is my code so far:

MainWindow.Xaml.cs (where tb is the Textbox in focus I want to pass through)

public MainWindow()
{
            InitializeComponent();
            TotalTextBox.Focus();

            // Setup keypad
            bool dotControl = false;
            int count = 0;
}

private void RemoveLastButton_Click(object sender, RoutedEventArgs e)
{
    try
    {
        var keypadObject = new Keypad();
        keypadObject.RemoveLast(TextBox tb, bool dotControl, int count);
    }
    catch (Exception)
    {
        TotalTextBox.Focus();
    }
}

Keypad.cs

public void RemoveLast(TextBox tb, bool dotControl, int count)
{
    if (tb.Text.Length > 0)
    {
        if (char.IsDigit(tb.Text[tb.Text.Length - 1])) count = 0;
        else
        {
            dotControl = false;
            count = 0;
        }
        tb.Text = tb.Text.Remove(tb.Text.Length - 1, 1);
    }
}

Upvotes: 0

Views: 33

Answers (1)

Nathan A
Nathan A

Reputation: 11319

To get the currently focused textbox, you can do something like this:

TextBox textbox = Keyboard.FocusedElement as TextBox;

If textbox ends up being null, then it's not a textbox that is currently focused.

To complete the answer, you can filter what you want by simple comparison to your known textboxes.

if (textbox != null && textbox != DriverTextBox)
{
    var keypadObject = new Keypad();
    keypadObject.RemoveLast(textbox, dotControl, count);
}

Upvotes: 2

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