如何获取转换后的布尔值以在asp.net gridview的可编辑下拉列表中显示为选定值？

Question

I have a database flag, ActiveFlag, that I show as Yes/No in the gridview row. On edit, a drop down list that presents the options is displayed, however it always shows Yes even if the current value is No. I'm sure the problem is that the code I have to show the selected item is not working, but I'm unsure of how to fix it.

<asp:TemplateField HeaderText="Active" SortExpression="ActiveFlag"
    ItemStyle-HorizontalAlign="Center">
    <ItemTemplate>
        <%# (Boolean.Parse(Eval("ActiveFlag").ToString()))? "Yes" : "No" %>
    </ItemTemplate>
    <EditItemTemplate>
        <asp:DropDownList ID="ddlActive" runat="server" 
           Selected='<%# (Boolean.Parse(Eval("ActiveFlag").ToString()))? "Yes" : "No" %>' >
            <asp:ListItem Text="Yes" Value="1" />
            <asp:ListItem Text="No" Value="0" />
        </asp:DropDownList>
    </EditItemTemplate>
</asp:TemplateField>

Answer 1

You can use DropDownList's SelectedValue .

Note : Make sure conditional operator are ListItems' values. In your code, they are "1" and "0".

<asp:DropDownList ID="ddlActive" runat="server"
    SelectedValue='<%# Convert.ToBoolean(Eval("ActiveFlag"))? "1" : "0" %>'>
    <asp:ListItem Text="Yes" Value="1" />
    <asp:ListItem Text="No" Value="0" />
</asp:DropDownList>