dropdown in grid should select as per dtaabse record

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C#3.0

C#

ASP.NET4

i had one Grid,in that grid one column is drop down like this

<asp:TemplateField HeaderText="Type" ControlStyle-Width="55px">
                    <itemtemplate>
                        <asp:DropDownList ID="ddltype" runat="server"  SelectedText='<%# Eval("Taxfeetype").ToString().ToLower().Equals("tax") ? "Tax" : "Fee" %>'>
                            <asp:ListItem Value="fee">Fee
                            <asp:ListItem Value="tax">Tax
                        
                    </itemtemplate>

now i had one sql data table with the following columns

Taxfeetype nvarchar(5),
Decription nvarchar(50),
PercentorFlat nvarchar(20),
TaxFeeValue decimal(10,4)

now if i enter one record like this:

insert into Testtaxandfess values('Tax','Surpls Lines Tax','percent',3.0000)

automatically in dropdown tax should be selected...

similarly if i write record like this:

insert into Testtaxandfess values('Fee','Inspection Fee','percent',100.0000)

fee should be defaultly selected....
please help