Razor code

SelectModel customerSelect = new SelectModel(DataSourceType.SQLite, "northwind", "Customers")
{
    Caption = "Customer",
    Searchable = true,
    EmptyOption = "Please select a customer",
    Columns = new List()
    {
        new SelectColumn("CustomerID"),
        new SelectColumn("CompanyName")
    }
};
customerSelect.ClientEvents[SelectClientEvent.OptionSelected] = "showSelectedCustomer";
@(await new DbNetSuiteCore.SelectControl(HttpContext).Render(customerSelect))
<div id="selectedCustomer"></div>