Hello and some help for a newb

I've just tried it myself, and I appear to be working fine. What error are you getting?

My code is:

ColorDialog colorDlg1 = new ColorDialog();

if (colorDlg1 != null)
{
    colorDlg1.Color = BackColor;

    if (colorDlg1.ShowDialog() == DialogResult.OK)
    {
        BackColor = colorDlg1.Color;
    }
}

What you'll need is a member integer/double variable. When an action button (add, subtract, etc) is pressed, store the currently entered number into that member variable. You'll also probably need to store which action has been selected into another member variable (have a search for enumerated types on the net).

Then when the Equals button is pressed, you can retrieve the action previously selected (e.g. Add), and then use the member variable previously stored. Retrieve the value from the textBox, and perform the calculation, updating the label.


I imagine the code behind (for example) the add button should be:

OnAddButtonClick()
{
      m_fOriginalNumber = numberLabel.Text;
      m_iAction = 1; // should be an enumerated type for each type of action, I'm using 1 = Add

      // Up to you how you handle the entry of a new number, I'm just clearing the control
      // here to keep this example fairly simple...
      textBox1.Text = "";
}

OnEqualButtonClick()
{
     if (m_iOriginalNumber != 0)
     {
          if (m_iAction == 1) // Add
          {
              int iTemp = textBox1.Text;
              int iResult = m_fOriginalNumber + iTemp;
              numberLabel.Text = iResult.ToString();
              m_fOriginalNumber = 0;
              m_iAction = 0; // defaulting to be no action defined...
          }
     }
}

Hope this helps a little, let me know if any other questions/problems...
PS. I've not tried this code in any way, so it may not work, just what I've thought up in my head!