How set a ControlParameter to a textbox control in a FormView?

[JimFeng]

I have an ObjectDataSource need a ControlParameter point to a textbox control in a FormView. When I use "myFormView.txtName" as ControlID I got error "Could not find control 'myFormView.txtName' in ControlParameter 'cpTest'". How can setup this ControlID?

[minhpc_bk]

You need to use the $ or : as the delimiter instead of the ., also make sure that the control does exist by the time the control parameter's value is populated.