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">
<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 don't provide straight forward answers.
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...
