Dropdown in DataGrid display textbox in datagrid

[EDN Admin]

Not sure how to accomplish this if anyone could help I would appreciate it
Im trying to get my dropdown "ddDropChange" to make my textbox "txtText" visible in the next column.

Depending on how many rows there are in my datagrid would reflect how many dropdowns I would have. Also the textbox would be invisible until I select the value "Drop" from what everrow I select from.

<aspataGrid ID="myDataGrid" runat="server" AutoGenerateColumns="False" <br/>
BackColor="AntiqueWhite" BorderColor="Black" CellPadding="3" <br/>
Font-Name="Verdana" Font-Names="Verdana" <br/>
Font-Size="8pt" HeaderStyle-BackColor="#aaaadd" <br/>
Width="909px" <br/>
onselectedindexchanged="myDataGrid_SelectedIndexChanged <br/>
<HeaderStyle BackColor="Maroon" ForeColor="White" /><br/>
<br/>
<Columns><br/>
<asp:TemplateColumn HeaderText="Select Action <br/>
<ItemTemplate><br/>
<br/>
<aspropDownList ID="ddDropChange" runat="server" onselectedindexchanged="ddAction" Enabled="True" AutoPostBack="True <br/>
<asp:ListItem Value ="0" >Select an Action</asp:ListItem><br/>
<asp:ListItem Value ="1" >Drop</asp:ListItem><br/>
<asp:ListItem Value ="2" >Change</asp:ListItem><br/>
<br/>
</aspropDownList><br/>
</ItemTemplate></asp:TemplateColumn>
<asp:TemplateColumn HeaderText="ID <br/>
<ItemTemplate><br/>
<asp:TextBox ID="txtText" Columns="3" runat="server" Visible="False </asp:TextBox>
<br/>
</ItemTemplate><br/>
</asp:TemplateColumn>
</Columns><br/>
</aspataGrid>

Code Behind
protected void ddAction(object sender, EventArgs e)<br/>
<br/>
{<br/>
<br/>
{<br/>
DropDownList ddl = myDataGrid.Rows.FindControl("ddDropChange") as DropDownList;
<br/>
}<br/>
<br/>
}<br/>
<br/>
protected void myDataGrid_SelectedIndexChanged(object sender, EventArgs e)<br/>
{<br/>
<br/>
}<br/>
}



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