谢谢大家 问题解决了 现在把答案 公布 SqlCommand myCmd = new SqlCommand("Select * from cp" ,FangFa.myCn);
SqlDataReader mySdl;
mySdl=myCmd.ExecuteReader();
cpbhtxt.Items.Clear();
while (mySdl.Read())
{
cpbhtxt.Items.Add(mySdl.GetValue(0));
}
SqlDataReader mySdl;
mySdl=myCmd.ExecuteReader();
cpbhtxt.Items.Clear();
while (mySdl.Read())
{
cpbhtxt.Items.Add(mySdl.GetValue(0));
}
combobox1.DataSource = myCmd.ExecuteReader();