从ItemTemplate复制控件

Question

I'm dealing with FormView .
I have a ridiculous long input form, so i was wondering if there's a way to programmatically copy ALL the controls from ItemTemplate to InsertItemTemplate/UpdateItemTemplate so I don't have to repeat the all Text Boxes / DDLs etc in the .aspx since the information entered is the same for both Update /Insert (I already know I can copy /paste, but the .aspx is messy enough already).

I am able to set InsertItemTemplate = ItemTemplate and when I set the mode to Insert the fields are all displayed. The problem is that when I try to do a FindControl in the submit event I always get null.

Answer 1

If you put all your controls in ItemTemplate into a container - say a panel - you can get to them in code through that panels .Controls property. Iterating over this you could then add them to panels in the other templates... Just an idea... :)

foreach (var item in myItemPanel.controls) myInsertPanel.controls.add(item)

If you have nested the original controls inside each others, you'd need to reflect that in the foreach loop...

Answer 2

You can create a user control to hold your layout. Register the control in your webpage:

<%@ Register TagPrefix="ctrl" TagName="FormControl" Src="FormControl.ascx" %>

And add it to the FormView :

<asp:FormView ID="FormView1" runat="server" 
DataSourceID="ObjectDataSource1" 
AllowPaging="True" EnableViewState="False">

  <ItemTemplate>
    <ctrl:FormControlID="MyControl1" runat="server" Mode="Item"/>
  </ItemTemplate>
  <InsertItemTemplate>
    <ctrl:FormControlID="MyControl2" runat="server" Mode="InsertItem"/>
  </InsertItemTemplate>
</FormView>

I added a Mode argument because it could be to change the layout inside your control depending on the selected mode.