Re: how to add "Select" item in combobox in silverlight 3

Hi,

     I want to add default item like "--Select--" in combobox for silverlight 3 for both static/dynamic population of combo box.
Here is the sample code.Please Help.

List _date = new List()
            {
                new date() {Name="Mins"},
                new date() {Name="Hour"},
                new date() {Name="Day"},
                new date() {Name="Week"},
                new date() {Name="Month"},
                new date() {Name="Year"}

            };
            cmbPerweek1.ItemsSource = _date;
           // cmbPerweek1.Items.Add("--Select Time Interval--");
            cmbPerweek1.Items.Insert(0,"--Select Time Interval--");
            cmbPerweek1.SelectedIndex = 0;

This is one type and another dropdown is loaded from Service.How to add for that too.When it run the Application it displays
"Operation not supported on read-only collection."..

Thanks in Advance.

Hi,

Please try this.

MainPage.Xaml :

MainPage.xaml.cs :

    public partial class MainPage : UserControl
    {

        public MainPage()
        {
            InitializeComponent();
            List _date = new List()
            {
                new dataclass() {Name="Mins"},
                new dataclass() {Name="Hour"},
                new dataclass() {Name="Day"},
                new dataclass() {Name="Week"},
                new dataclass() {Name="Month"},
                new dataclass() {Name="Year"}

            };
           // comboBox1.ItemsSource = _date.ToList();
            comboBox1.Items.Add("--Select--");
            comboBox1.SelectedIndex = 0;
            for (int i = 0; i < _date.Count; i++)
            {
                comboBox1.Items.Add(_date[i].Name.ToString());
            }
        }
    }

    public class dataclass
    {
        private string name;
        public string Name
        {
            get { return name;}
            set { name = value; }
        }
    }

Please chk attached code file.

Hope this will help you.

Thanks.

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Priya Linge15y ago
Hi,
Please try this.
MainPage.Xaml :



MainPage.xaml.cs :
    public partial class MainPage : UserControl
    {

        public MainPage()
        {
            InitializeComponent();
            List _date = new List()
            {
                new dataclass() {Name="Mins"},
                new dataclass() {Name="Hour"},
                new dataclass() {Name="Day"},
                new dataclass() {Name="Week"},
                new dataclass() {Name="Month"},
                new dataclass() {Name="Year"}
            };
           // comboBox1.ItemsSource = _date.ToList();
            comboBox1.Items.Add("--Select--");
            comboBox1.SelectedIndex = 0;
            for (int i = 0; i < _date.Count; i++)
            {
                comboBox1.Items.Add(_date[i].Name.ToString());
            }
        }
    }
    public class dataclass
    {
        private string name;
        public string Name
        {
            get { return name;}
            set { name = value; }
        }
    }
Please chk attached code file.
Hope this will help you.
Thanks.