Question

i have two list boxes in my form and a button in between these two boxes. In the first box i binded some data from the database and from this list box i have to select the items and should display those selected items in the second list box. this should happen when i click a button.i used the following code.i used a hash table.

private void btnCATAdd_Click(object sender, EventArgs e)
{
    Hashtable ht = new Hashtable();
    ht.Add(lbCATallSubcat.SelectedValue.ToString(),
                                    lbCATallSubcat.Text.ToString());
    int i = 0;
    foreach (string ent in ht.Values)
    {
       string[] name = new string[lbCATallSubcat.Items.Count];
       for (i = 0; i < lbCATallSubcat.SelectedItems.Count; i++)
       {
           name[i] = lbCATallSubcat.Text;
           this.lbCATSelectedSubcat.Items.Add(name[i]);
       }
       lbCATSelectedSubcat.DisplayMember = ht.Values.ToString();
       lbCATSelectedSubcat.ValueMember = ht.Keys.ToString();
    }
}

well its working fine when im selecting only single item in the first list box but im unable to display when more than one item is selectd from the first list box

Answer 1

You should use SelectedItems property on that listbox instead SelectedValue. Currently your Hashtable contains only one element.

See http://msdn.microsoft.com/en-us/library/system.windows.forms.listbox.selecteditems.aspx