Monster Select Statement Revisited

I have a database with a date of birth.  From this, I need to select records that include a large number of variables including records where an individual is older than a selected age and/or younger than a selected age, and even worse, of a given astrological sign if one is selected. 
I'm currently using a strongly typed dataset.  Is this something that's do-able with a dataset, or should I build the select string on the form programmatically?   I have an ASP site that I'm re-writing in ASP.NET 2.0.  In the ASP site the select string includes the code below.  I just don't see how  I can do this in a dataset.
if (strLowerAge <> 18) or (strUpperAge <> 99) then
      If (strLowerAge <> "") Then
         strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DateDiff(yyyy, [DATE OF BIRTH], '" & date & "') >= " & strLowerAge & ")"
      End If
      If (strUpperAge <> "") Then
         If (strSQL <> "") Then
            strSQL = strSQL & " AND (DateDiff(yyyy, [DATE OF BIRTH], '" & date & "') <= " & strUpperAge & ")"
         Else
            strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DateDiff(yyyy, [DATE OF BIRTH], '" & date & "') <= " & strUpperAge & ")"
         End If
      end if
   End If
   If (strAstSign <> "") Then
      Select Case strAstSign
         Case "Aries 3/21 - 4/19"
            If (strSQL <> "") Then
               strSQL = strSQL & " AND ((DATEPART(m,[DATE OF BIRTH]) = 3 AND DATEPART(d,[DATE OF BIRTH]) > 20 ) OR (DATEPART(m,[DATE OF BIRTH]) = 4 AND DATEPART(d,[DATE OF BIRTH]) < 20 ))"
            Else
               strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DATEPART(m, [DATE OF BIRTH]) = 3 AND DATEPART(d, [DATE OF BIRTH]) > 20 ) OR (DATEPART(m, [DATE OF BIRTH]) = 4 AND DATEPART(d, [DATE OF BIRTH]) < 20 )"
            End If
         Case "Taurus 4/20 - 5/20"
            If (strSQL <> "") Then
               strSQL = strSQL & " AND ((DATEPART(m,[DATE OF BIRTH]) = 4 AND DATEPART(d,[DATE OF BIRTH]) > 19 ) OR (DATEPART(m,[DATE OF BIRTH]) = 5 AND DATEPART(d,[DATE OF BIRTH]) < 21 ))"
           Else
               strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DATEPART(m,[DATE OF BIRTH]) = 4 AND DATEPART(d,[DATE OF BIRTH]) > 19 ) OR (DATEPART(m,[DATE OF BIRTH]) = 5 AND DATEPART(d,[DATE OF BIRTH]) < 21 )"
            End If
         Case "Gemini 5/21 - 6/20"
            If (strSQL <> "") Then
              strSQL = strSQL & " AND ((DATEPART(m,[DATE OF BIRTH]) = 5 AND DATEPART(d,[DATE OF BIRTH]) > 20 ) OR (DATEPART(m,[DATE OF BIRTH]) = 6 AND DATEPART(d,[DATE OF BIRTH]) < 21 ))"
           Else
               strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DATEPART(m,[DATE OF BIRTH]) = 5 AND DATEPART(d,[DATE OF BIRTH]) > 20 ) OR (DATEPART(m,[DATE OF BIRTH]) = 6 AND DATEPART(d,[DATE OF BIRTH]) < 21 )"
            End If
         Case "Cancer 6/21 - 7/22"
            If (strSQL <> "") Then
               strSQL = strSQL & " AND ((DATEPART(m,[DATE OF BIRTH]) = 6 AND DATEPART(d,[DATE OF BIRTH]) > 20 ) OR (DATEPART(m,[DATE OF BIRTH]) = 7 AND DATEPART(d,[DATE OF BIRTH]) < 23 ))"
           Else
               strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DATEPART(m,[DATE OF BIRTH]) = 6 AND DATEPART(d,[DATE OF BIRTH]) > 20 ) OR (DATEPART(m,[DATE OF BIRTH]) = 7 AND DATEPART(d,[DATE OF BIRTH]) < 23 )"
            End If  
         Case "Leo 7/23 - 8/22"
            If (strSQL <> "") Then
               strSQL = strSQL & " AND ((DATEPART(m,[DATE OF BIRTH]) = 7 AND DATEPART(d,[DATE OF BIRTH]) > 22 ) OR (DATEPART(m,[DATE OF BIRTH]) = 8 AND DATEPART(d,[DATE OF BIRTH]) < 23 ))"
           Else
               strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DATEPART(m,[DATE OF BIRTH]) = 7 AND DATEPART(d,[DATE OF BIRTH]) > 22 ) OR (DATEPART(m,[DATE OF BIRTH]) = 8 AND DATEPART(d,[DATE OF BIRTH]) < 23 )"
            End If
         Case "Virgo 8/23 - 9/22"
            If (strSQL <> "") Then
               strSQL = strSQL & " AND ((DATEPART(m,[DATE OF BIRTH]) = 8 AND DATEPART(d,[DATE OF BIRTH]) > 22 ) OR (DATEPART(m,[DATE OF BIRTH]) = 9 AND DATEPART(d,[DATE OF BIRTH]) < 23 ))"
            Else
               strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DATEPART(m,[DATE OF BIRTH]) = 8 AND DATEPART(d,[DATE OF BIRTH]) > 22 ) OR (DATEPART(m,[DATE OF BIRTH]) = 9 AND DATEPART(d,[DATE OF BIRTH]) < 23 )"
            End If
         Case "Libra 9/23 - 10/22"
            If (strSQL <> "") Then
              strSQL = strSQL & " AND ((DATEPART(m,[DATE OF BIRTH]) = 9 AND DATEPART(d,[DATE OF BIRTH]) > 22 ) OR (DATEPART(m,[DATE OF BIRTH]) = 10 AND DATEPART(d,[DATE OF BIRTH]) < 23 ))"
            Else
               strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DATEPART(m,[DATE OF BIRTH]) = 9 AND DATEPART(d,[DATE OF BIRTH]) > 22 ) OR (DATEPART(m,[DATE OF BIRTH]) = 10 AND DATEPART(d,[DATE OF BIRTH]) < 23 )"
            End If
         Case "Scorpio 10/23 - 11/21"
            If (strSQL <> "") Then
               strSQL = strSQL & " AND ((DATEPART(m,[DATE OF BIRTH]) = 10 AND DATEPART(d,[DATE OF BIRTH]) > 22 ) OR (DATEPART(m,[DATE OF BIRTH]) = 11 AND DATEPART(d,[DATE OF BIRTH]) < 22 ))"
            Else
               strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DATEPART(m,[DATE OF BIRTH]) = 10 AND DATEPART(d,[DATE OF BIRTH]) > 22 ) OR (DATEPART(m,[DATE OF BIRTH]) = 11 AND DATEPART(d,[DATE OF BIRTH]) < 22 )"
            End If
         Case "Sagittarius 11/22 - 12/21"
            If (strSQL <> "") Then
               strSQL = strSQL & " AND ((DATEPART(m,[DATE OF BIRTH]) = 11 AND DATEPART(d,[DATE OF BIRTH]) > 21 ) OR (DATEPART(m,[DATE OF BIRTH]) = 12 AND DATEPART(d,[DATE OF BIRTH]) < 22 ))"
            Else
               strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DATEPART(m,[DATE OF BIRTH]) = 11 AND DATEPART(d,[DATE OF BIRTH]) > 21 ) OR (DATEPART(m,[DATE OF BIRTH]) = 12 AND DATEPART(d,[DATE OF BIRTH]) < 22 )"
            End If
         Case "Capricorn 12/22 - 1/19"
            If (strSQL <> "") Then
               strSQL = strSQL & " AND ((DATEPART(m,[DATE OF BIRTH]) = 12 AND DATEPART(d,[DATE OF BIRTH]) > 21 ) OR (DATEPART(m,[DATE OF BIRTH]) = 1 AND DATEPART(d,[DATE OF BIRTH]) < 20 ))"
            Else
               strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DATEPART(m,[DATE OF BIRTH]) = 12 AND DATEPART(d,[DATE OF BIRTH]) > 21 ) OR (DATEPART(m,[DATE OF BIRTH]) = 1 AND DATEPART(d,[DATE OF BIRTH]) < 20 )"
            End If
         Case "Aquarius 1/20 - 2/18"
            If (strSQL <> "") Then
               strSQL = strSQL & " AND ((DATEPART(m,[DATE OF BIRTH]) = 1 AND DATEPART(d,[DATE OF BIRTH]) > 19 ) OR (DATEPART(m,[DATE OF BIRTH]) = 2 AND DATEPART(d,[DATE OF BIRTH]) < 19 ))"
            Else
               strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DATEPART(m,[DATE OF BIRTH]) = 1 AND DATEPART(d,[DATE OF BIRTH]) > 19 ) OR (DATEPART(m,[DATE OF BIRTH]) = 2 AND DATEPART(d,[DATE OF BIRTH]) < 19 )"
            End If
         Case "Pisces 2/19 - 3/20"
            If (strSQL <> "") Then
               strSQL = strSQL & " AND ((DATEPART(m,[DATE OF BIRTH]) = 2 AND DATEPART(d,[DATE OF BIRTH]) > 18 ) OR (DATEPART(m,[DATE OF BIRTH]) = 3 AND DATEPART(d,[DATE OF BIRTH]) < 21 ))"
            Else
               strSQL = "SELECT [DATE OF BIRTH], [FIRST NAME], [LAST NAME], [STATE], [MALE OR FEMALE] FROM members WHERE (DATEPART(m,[DATE OF BIRTH]) = 2 AND DATEPART(d,[DATE OF BIRTH]) > 18 ) OR (DATEPART(m,[DATE OF BIRTH]) = 3 AND DATEPART(d,[DATE OF BIRTH]) < 21 )"
            End If
      End Select  
   END IF

Diane