Clearing NumericUpDown

Question

My problem with NumericUpDown control is when the user selects a value from NumericUpDown And unchecks the checkBox1 and clicks the Save button, the value of NumericUpDown not c

Answer 1

I was using the NumericUpDown control without the spinners because I wanted only numbers. The control was in a child dialog that was invoked from a listview selection. When the value to be loaded into the NumericUpDown control was zero in the listwiew, a zero was in the control. That zero always had to be cleared out. Here's how I made it "appear" blank. If it was zero, I change the ForeColor of the control to white. I added an Enter event that changed the ForeColor to black and deleted the zero.

This hid the NumericUpDown control spinners.

AccessCode.Controls[0].Visible = false;

These statements were in the form initialization. (var code was to be loaded into AccessCode)

        if (code == 0)
        {
            AccessCode.ForeColor = Color.White;
        }

The Enter event code looked like this.

    private void AccessCode_Enter(object sender, EventArgs e)
    {
        if (AccessCode.ForeColor == Color.White)
        {
            AccessCode.ForeColor = Color.Black;
            AccessCode.Focus();
            SendKeys.SendWait("{Delete}");
        }
    }

The AccessCode control also had a Leave event that checked for valid data.