Extracting specific string from combobox select

Question

I have a combobox for an item list that I populate using the following code:

List<string> comboboxItems = new List<string>();

foreach (var p in products)
{
   var x = p.Product;

   foreach (var pn in x)
   {
      comboboxItems.Add(pn.name + " :Qty " + pn.quantity_available
                         + " :Tax " + pn.default_tax_tier);                       
   }
}

cmbItems.DataSource = comboboxItems;

What should I do in order to get the value, pn.name only when the combobox item is selected?

Using WinForms.

Answer 1

You have to handle the event DataGridView.EditingControlShowing event, in there you can access the actual combobox and register the SelectedIndexChanged event handler like this:

//EditingControlShowing event handler for your dataGridView1
private void dataGridView1_EditingControlShowing(object sender,
                                   DataGridViewEditingControlShowingEventArgs e){
   if(dataGridView1.CurrentCell.OwningColumn == cmbItems){
     var combo = e.Control as ComboBox;
     combo.SelectedIndexChanged -= cmbItems_SelectedIndexChanged;
     combo.SelectedIndexChanged += cmbItems_SelectedIndexChanged;
   }   
}
private void cmbItems_SelectedIndexChanged(object sender, EventArgs e){
   var combo = sender as ComboBox;
   //Note that SelectedItem may be null
   var s = Convert.ToString(combo.SelectedItem);
   int i = s.IndexOf(" :Qty");
   var selectedName = i == -1 ? "" : s.Substring(0,i+1).TrimEnd();
   //other code ...
}