How to return 3 lists data from once class to Visual Web part

Hi All,

I have created a Visual Web Part and added a class(Splogic.CS) for SharePoint logic purpose.

In Visual Web Part i have added 4 dropdownlists. In Class Splogic.CS i wrote a method which fetch data from 4 different lists.like follow

using(spcontext obj)

{
	using(spweb object)
	{
            tryGetList();
            foreach(SPlistitem item in list.item)
             {
                What to do here?
              }
tryGetList();
            foreach(SPlistitem item in list.item)
             {
                What to do here?
              }
tryGetList();
            foreach(SPlistitem item in list.item)
             {
                What to do here?
              }
tryGetList();
            foreach(SPlistitem item in list.item)
             {
                What to do here?
              }

	}
}

so here i can get all 4 list's data. But my question is how to get that data from this class and bind each lists data to a separate Dropdownlist.

Please tell me how could i solve this?