Question

I am trying to create a GUI where selecting an item inside the combobox changes whether each checkbox is checked or not.

The GUI has alot of checkboxes which user can check or uncheck.

For example, user can select “item 1” from combobox, which then user checks whatever checkbox he wants to check. Then, when the user selects “item 2”, checkboxes which were checked from “item 1” will be greyed out and user can check or uncheck from the rest.

Each items from combobox basically saves user’s choices on the checkbox.

Can anyone show me how to do this?

Answer 1

For example 4 checkboxes, 1 combobox

    public Form1()
    {
        InitializeComponent();
        for (int i = 0; i < 3; i++)
            comboBox1.Items.Add(i.ToString());
        comboBox1.Text = comboBox1.Items[0].ToString();
    }
    bool needtoupdate = true;
    public class CheckedItems
    {
        public CheckedItems()
        {
            for (int i = 0; i < b.Length; i++)
            {
                b[i] = false;
            }
        }
        public bool[] b = { false, false, false, false };
    }

    CheckedItems[] allcheckeditems = { new CheckedItems(), new CheckedItems(), new CheckedItems()};

    private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        needtoupdate = false;
        checkBox1.Checked = allcheckeditems[Convert.ToInt32(comboBox1.Text)].b[0];
        checkBox2.Checked = allcheckeditems[Convert.ToInt32(comboBox1.Text)].b[1];
        checkBox3.Checked = allcheckeditems[Convert.ToInt32(comboBox1.Text)].b[2];
        checkBox4.Checked = allcheckeditems[Convert.ToInt32(comboBox1.Text)].b[3];
        needtoupdate = true;
    }

    void saveallchecked()
    {
        if (!needtoupdate) return;
        allcheckeditems[Convert.ToInt32(comboBox1.Text)].b[0] = checkBox1.Checked;
        allcheckeditems[Convert.ToInt32(comboBox1.Text)].b[1] = checkBox2.Checked;
        allcheckeditems[Convert.ToInt32(comboBox1.Text)].b[2] = checkBox3.Checked;
        allcheckeditems[Convert.ToInt32(comboBox1.Text)].b[3] = checkBox4.Checked;
    }

    private void comboBox1_SelectedValueChanged(object sender, EventArgs e)
    {
    }

    private void checkBox1_CheckedChanged(object sender, EventArgs e)
    {
        saveallchecked();
    }

    private void checkBox2_CheckedChanged(object sender, EventArgs e)
    {
        saveallchecked();
    }

    private void checkBox3_CheckedChanged(object sender, EventArgs e)
    {
        saveallchecked();
    }

    private void checkBox4_CheckedChanged(object sender, EventArgs e)
    {
        saveallchecked();
    }