i want my destination rule (send to manager) to get the value from a form that started my process. in the form, there will be a value from a textbox there that will contain a domain/username which will be stored to my K2 data field called UserName.

in k2 studio, i generate code for my destination rule. here's the generated code

oDEManager = oDSH.GetManager(oDSH.GetUser("domainusername").Path)

how do i edit this code to dynamically get the value of my UserName data field which was filled up from the form? i tried

oDEManager = oDSH.GetManager(oDSH.GetUser(K2.ProcessInstace.DataFields("UserName").ToString).Path)

but i get an error saying object not reference not set to an instance of the object. please help.

thanks