Question

In ObjectDataSource my checkbox is always ignored. My update method always receives NULL. What am I doing wrong here?

Thanks.

<asp:CheckBox ID="CheckBoxSort" runat="server" Checked="true" />

CheckBox is on its own. It is not contained in any other .net controls.
….

<asp:ObjectDataSource ID="odsProfileItems" runat="server" SelectMethod="GetProfileItemsForCategory" TypeName="Valero.WEB.BO.StoreProfile.ProfileItemService"             UpdateMethod="UpdateProfileItem">
    <SelectParameters>
        <asp:Parameter Name="CategoryID" Type="Int32" />
    </SelectParameters>
    <UpdateParameters>
        <asp:ControlParameter Name="IsSorting" ControlID="CheckBoxSort" PropertyName="Checked" />
    </UpdateParameters>
</asp:ObjectDataSource>

Answer 1

When using a CheckBox control with an Object Data Source, the value to pass to the wired up ‘Update’ method needs to be of type Boolean. I do this often, take a look to my code:

 <UpdateParameters>
       <asp:Parameter Name="IsAdminUser" Type="Boolean" />
       <asp:Parameter Name="IsPowerUser" Type="Boolean" />  
 </UpdateParameters>

Now just to show you as well, here is how I am binding the CheckBox on the page with data from the ‘Select’:

<asp:CheckBox ID="chkIsAdmin" runat="server" Checked='<%# Bind("IsAdminUser") %>' />

This checkbox control happens to be within a GridView, and the GridView’s datasource is the Object Data Source control, so that is where data is bound. No matter if you are using a GridView or any other control such as a plain checkbox box, you should be able to use the format above to get the checkbox bound and updated properly.