find dropdwonlist control in datalist

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Binding

datalist

please can you give me an advise to can access dropdownlist in datalist
i cant get data from database to dropdownlist inside datalist or retrive data from dropdownlist to database

My desgin Code

<asp:DataList ID="DataList1" runat="server" OnItemDataBound="DataList1_ItemDataBound">
    <ItemTemplate>
        <asp:DropDownList ID="DropDownList1" runat="server"></asp:DropDownList>

    </ItemTemplate>
            </asp:DataList>

C#

protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item)
        {

            DropDownList d = e.Item.FindControl("DropDownList1") as DropDownList;
            d.Items.Add("Ali");
            d.Items.Add("Ahmed");
           

        }
    }

and test this code but no result
DropDownList ddlDodatno = (DropDownList)DataList1.FindControl("DropDownList1");

and i find problem if bind with dataset
please Help
thx