I will simplify m demand...
In my RadGrid I have 2 visible columns : a GridTemplateColumn (col1) (TextBox in Edit mode) and a GridButtonColumn (col2).
The client click on the GridButtonColumn opens a RadWindow without firing a postback.
The user must fill the textbox in col1 then click on the button of the col2 to complete filling data in a PopUp window.
In the RadWindow, I have 1 Label and 1 Textbox (that represents 2 hidden columns (col3 and col4) in the RadGrid) and a validation buttons.
The Label must show the value filled of the col1. The user must fill the textbox and then on validation button click I fire BatchEditingCommand to save data in the RadGrid (and the PopUp of course).
What I need to do is to retreive the value of the textbox (col2) when I am in edit mode.
If my request is not clear let me know so I can provide a portion of my code.
Thank you in advance.