Combobox 中的项目已添加

Question

I've two radiobuttons and a single checkbox.

Items in checkbox will pop up according to the radiobutton selected.

The problem is when I click the second radiobutton after clicking the first radiobutton, Combobox pops us all the values from both radiobutton 1 and 2.

    private void radioButton1_CheckedChanged(object sender, EventArgs e)
    {
        foreach (string apacservers in Properties.Settings.Default.B)
        {             
            comboBox1.Items.Add(ItemsB);
        }                    
    }

    private void radioButton2_CheckedChanged(object sender, EventArgs e)
    {
        foreach (string europeservers in Properties.Settings.Default.A)
        {               
            comboBox1.Items.Add(ItemsA);
        }               
    }

Any help would be much appreciated

Answer 1

you need to add comboBox1.Items.Clear(); before both of your foreachs.