Question

How can I do Eval() in a DropDownList that are inside a GridView?

I tried the follow code, but still wrong:

<asp:TemplateField HeaderText="Prioridade">
    <ItemTemplate>
        <asp:DropDownList ID="ddlPrioridade" runat="server"
             SelectedValue='<%# Eval("Prioridade") %>'>
        </asp:DropDownList>
    </ItemTemplate>
</asp:TemplateField>

Answer 1

Try this way

<asp:DropDownList ID="ddlPrioridade" runat="server" AppendDataBoundItems="true" DataSourceID="datasource"  DataTextField="key" DataValueField="data" AutoPostBack="True" SelectedValue='<%# Eval("Prioridade") %>'>

also have a look at this DropDownList inside a GridView (or DataGrid). It might help you