我发现了怎么做这里;这样可行：

  string  constring = Properties.Settings.Default .CPSDataConnection; 
使用（SqlConnection con =  new  SqlConnection（constring））
 {
使用（SqlCommand cmd =  new  SqlCommand（  SELECT单位FROM MasterUnits ORDER BY单位，con））
 {
 cmd.CommandType = CommandType.Text; 
使用（SqlDataAdapter sda =  new  SqlDataAdapter（cmd））
 {
 DataTable dt =  new  DataTable（）; 
 sda.Fill（dt）; 
（（ListBox）MemberListBox）.DataSource = dt; 
（（ListBox）MemberListBox）.DisplayMember =   Unit; 
（（ListBox）MemberListBox）.ValueMember =   Unit; 
} 
} 
} 

I can retrieve the data I want in LINQPad.

Trying to get it programmatically *and* assign it to a CheckedListBox in C#, though, has not yet worked. My code is:

var sqlDal = new SQLServer(Properties.Settings.Default.PltypusDataConnection) { CommandTimeout = 120 };
DataSet dsMembers = sqlDal.runSQLDataSet("SELECT PoisonToeLength FROM Platypi ORDER BY PoistonToeLength", "PoisonToes");
var dtMembers = dsMembers.Tables[0];
MemberListBox.DataSource = dtMembers;

All this does is fill the CheckedListBox (MemberListBox) with a slew of items displaying "System.Data.DataRowView"

How can I display the values from the query in the CheckedListBox?

I found out how to do it here ; so this works:

string constring = Properties.Settings.Default.CPSDataConnection;
using (SqlConnection con = new SqlConnection(constring))
{
    using (SqlCommand cmd = new SqlCommand("SELECT Unit FROM MasterUnits ORDER BY Unit", con))
    {
        cmd.CommandType = CommandType.Text;
        using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
        {
            DataTable dt = new DataTable();
            sda.Fill(dt);
            ((ListBox)MemberListBox).DataSource = dt;
            ((ListBox)MemberListBox).DisplayMember = "Unit";
            ((ListBox)MemberListBox).ValueMember = "Unit";
        }
    }
}