Multiple DataFields in Asp CheckBoxList?

Question

I'm currently working on a small quiz type app that populates questions and answers from an SQL .mdf database. I've been looking for a control in Visual Studio 2012 that could hold the four answers (preferably checkboxlist ).

The only problem is I have the questions saved in different columns, answer1 , answer2 etc.

The main question is, is there a way to populate the checkboxlist control with multiple data fields rather than just one?

I tried using four separate checkboxlists , but this made validation extremely difficult (Only one option should be selected). Does anyone have any advice or suggest how I could insert the four columns into a control that I could validate?

I read online about combining the answers using sql ie. SELECT Answer1 + ' ' + Answer2 , this works but again I don't know how to integrate this into a combo box list.

Answer 1

there are two easy ways:

on the database side you could use:

SELECT convert(Char,[Answer1]) FROM [TABLE1] union ALL  SELECT convert(char,[Answer2])   FROM [TABLE1] 

From the application side you could use Merge:

 dim dt as new datatable
dt = SQLdataTable("SELECT [Answer1]  FROM [TABLE1]")
dt.Merge(SQLdataTable("SELECT [Answer2]  FROM [TABLE1]").Copy)