C# WinForms numericUpDown control (removing the spin box)

Question

After a ton of googling, I couldn\'t come up with anything..

Is there any way to get a numericUpDown control that does not have the spin box?

I need a textbo

Answer 1

I settled for disabling the arrow buttons, as less ugly than trying to hide or remove them.

Immediately after this boilerplate code:

internal MainWin()
{
    InitializeComponent();

, add this:

    myNumericUpDown.Controls[0].Enabled = false;  // Disable the arrow buttons.

Also: set InterceptArrowKeys to false in the control's properties, to prevent arrow keys (on the keyboard) from incrementing and decrementing myNumericUpDown.Value.

Bad ways:

    myNumericUpDown.Controls[0].Hide();  // Hide the arrow buttons.
    // This leaves a gray patch that turns white after minimize-and-restore.

    myNumericUpDown.Controls.RemoveAt(0);  // Remove the arrow buttons.
    // This leaves a gray patch that turns white after minimize-and-restore.

Half-bad way:

Forget the above. Only set Increment to 0 in the control's properties. The arrow buttons still operate, and the arrow keys (on the keyboard) are still intercepted, but now they do nothing. Sadly, no-action buttons are probably less intuitive than disabled arrow buttons. (I'm surprised that it even accepts Increment = 0. A smart version of this control would neatly hide the arrow buttons when the increment is 0.)

Other solution(s):

A number-box can be implemented as a TextBox with extra code that restricts input to only numbers, and returns or announces a numeric value (decimal or your choice). (Searching finds many diverse, complex examples.) Pasted data comes in differently from keystrokes, so additional code is needed to handle pastes. (Upside: You can make the number-box smarter than the built-in NumericUpDown: NumericUpDown stupidly accepts and displays . until the user presses Enter or leaves the field, even if you specify DecimalPlaces = 0; and it accepts and displays multiple decimal points, which is nonsense.)

An integer-box is simpler than a generalized number-box that accepts real numbers (optionally in floating-point notation) and returns a real-number type (float, double, or decimal).

Answer 2

You can inherit from NumericUpDown. The trick is to hide control when the control is created.

public class NumericUpDownWitoutButtons : NumericUpDown
{
    public NumericUpDownWitoutButtons()
    {
        Controls[0].Visible = false;
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        e.Graphics.Clear(SystemColors.Window);
        base.OnPaint(e);
    }
}

If the place were buttons should be looks weird, override OnPaint too.

Also, you probably don't need NumericUpDown. Would it be enough to validate that only digits can by typed in? C# Numbers Only Textbox