I'm trying to perform two-way data binding on
the controls in my user
control, which is hosted inside a FormView template.
FormView:
<asp:ObjectDataSource runat="server" ID="ObjectDataSource"
TypeName="WebApplication1.Data" SelectMethod="GetItem" UpdateMethod="UpdateItem">
</asp:ObjectDataSource>
<asp:FormView runat="server" ID="FormView" DataSourceID="ObjectDataSource">
<ItemTemplate>
<uc:WebUserControl1 runat="server"></uc:WebUserControl1>
</ItemTemplate>
<EditItemTemplate>
<uc:WebUserControl1 runat="server"></uc:WebUserControl1>
</EditItemTemplate>
</asp:FormView>
User control:
<%@
Control Language="C#" ... %>
<asp:TextBox runat="server" ID="TitleTextBox" Text='<%# Bind("Title") %>'>
</asp:TextBox>
The binding works fine when
the FormView is in View mode but when I switch to Edit mode, upon calling UpdateItem on
the FormView,
the bindings are lost. I know this because
the FormView tries to call an update method on
the ObjectDataSource that
does not have an argument called 'Title'.
I tried to solve this by implementing IBindableTemplate to load
the controls that are inside my user
control, directly into
the templates (just like I had entered them declaratively like in
the code above). However, when calling UpdateItem in edit mode,
the container that gets passed into
the ExtractValues method of
the template,
does not contain
the TextBox anymore. It did in view mode!
I have found some questions on SO that relate to this problem but they are rather dated and they don't provide
any answers that helped me solve this problem.
How do you think I could solve this problem? It seems to be such a simple requirement but apparently it's more like opening a can of worms...
