Basics of Dropdownlist

• Simple DropdownList

 <asp:DropDownList ID="DropDownList1" runat="server" DataTextField="CustName"
        DataValueField="CustID">
        <asp:ListItem Value="0">Please select value</asp:ListItem>
        <asp:ListItem Value="1">Active</asp:ListItem>
        <asp:ListItem Value="0">InActive</asp:ListItem>
    </asp:DropDownList>

• Dynamic Dropdownlist

           DropDownList DDLProduct = new DropDownList();
            DDLProduct.Items.Add(new ListItem("---Please select value---", "-1"));
            DDLProduct.Items.Add(new ListItem("Male", "1"));
            DDLProduct.Items.Add(new ListItem("Female", "0"));

• To add items by using AddRange option

 ListItem[] ListArr = new ListItem[4];

            ListArr[0] = new ListItem() { Selected = true, Text = "India", Value = "1" };

            ListArr[1] = new ListItem() { Text = "Canada", Value = "2" };

            ListArr[2] = new ListItem() { Text = "US", Value = "3" };

            ListArr[3] = new ListItem() { Text = "UK", Value = "4" };

            

            DDLProduct.Items.AddRange(ListArr);

• New way of binding dropdownlist

DropDownList DDLCustomer = new DropDownList() { DataTextField="CustomerName",DataValueField="CustometID" };