Hey, I tried to move tasks through the SP UI from one Summary Task to other in the same task list, but I didn't find possibility for it.
Then I spent time to learn the SP Client Object Model and now I can read tasks form the list. I see every task has a "FileRef" and a "FileDirRef" field. If I think right these fields show the relation between list elements for example between a Task and a Summary Task elements.
I changed these fields' values and I tried to Update the ListItem but I got this error message: "Invalid data has been used to update the list item. The field you are trying to update may be read only."
I really need to move tasks what were created below a wrong Summary Task so please explain a method or pattern how I can do this. (I can create a new Task below to any Summary Task and I can set field values but I hope there is a way to really move tasks (I mean I should change the right field values somehow.).
I can reach the Task List both on the server and client side so I'm very interested in every solution. PowerShell solution is also good for me.
I'm using SharePoint 2010 SP2.
Thank you for your answer and your time. :)
Csaba Marosi