I already solve my problem by using this codes.
protected void Page_Load(object sender, EventArgs e)
{
bindProducts();
}
private void bindProducts()
{
using (systemDbEntities context = new systemDbEntities())
{
var q = from c in context.Products select new { c.ProductId, c.Name };
foreach (var item in q)
{
lstProducts.InnerHtml += "<option value='" + item.Name + "'>";
}
}
}
<asp:TextBox ID="txtBoxSearch" runat="server" placeholder="Search"
list="lstProducts"></asp:TextBox>
<datalist id="lstProducts" runat="server"></datalist>
Thank you guys! :)