CODEWITHSUNDEEP
c#wpf
Nagaraju Kuricheti
Nagaraju Kuricheti

Reputation: 83

Event handling in WPF to add check boxes to Combo Box

I have two combo Boxes in WPF application.

I have added checkboxes dynamically to the first Combo Boxes. If I select one of the check boxes from the first ComboBox, the checkbox event should be handled to add some checkboxes to the Second Combo Box.

I have tried, but I didn't work.

the code.

private void ComboBox_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
{
    AddAnalytes();
}


public void AddCartridges()
{
    for (int i = 0; i < cartridges.Length; i++)
    {
        CheckBox cbox = new CheckBox();
      //  cbox.Name = "cbox" + cartridges[i].ToString();
        cbox.Content = cartridges[i];
        this.CartridgeCombo.Items.Add(cbox);

        //CheckBox[] cartridgeBoxes= new
    }
}

public void AddAnalytes()
{
    if (this.CartridgeCombo.SelectedItem.ToString() == "CHEM8")
    {
        Analytes = new string[] { "NA", "K", "CL", "TCO2", "BUN", "CREA", "EGFR", "GLU", "CA", "ANG", "HCT", "HGB" };

        for (int i = 0; i < Analytes.Length; i++)
        {
            CheckBox cb = new CheckBox();

            cb.Name = "cb" + Analytes[i];
            cb.Content = Analytes[i];
            this.AnalyteCombo.Items.Add(cb);
        }
    }

Upvotes: 1

Views: 487

Answers (1)

Prateek Shrivastava
Prateek Shrivastava

Reputation: 1937

You have not used MVVM at all - so this will eventually get bit tricky for you - as everything is code behind. Below works for me:

private void PopulateCheckboxes1()
{
    for(int idx = 0; idx < 5; idx++)
    {
        var chkBox = new CheckBox();
        chkBox.Content = string.Format($"TextBox: {idx}");
        chkBox.Tag = idx;
        chkBox.Checked += ChkBox_Checked;
        cmbBox1.Items.Add(chkBox);
    }
}

private void ChkBox_Checked(object sender, RoutedEventArgs e)
{
    var itemsToAdd = (int)(sender as Control).Tag;
    cmbBox2.Items.Clear();
    for (int idx = 0; idx < itemsToAdd; idx++)
    {
        var chkBox = new CheckBox();
        chkBox.Content = string.Format($"TextBox: {idx}");
        cmbBox2.Items.Add(chkBox);
    }
}

Put your custom logic in ChkBox_Checked handler. My logic is to just add several check boxes to combo box 2 based on the Tag property.

Upvotes: 1

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