我老出现新的问题这个又提示：至少一个参数没有被指定！　　
哪位高手能给我个样板啊
只要点击一个按钮　　，然后让一个文本中的内容插入到数据库中　
小弟跪求，再此感激涕零……　

            String s1= comboBoxIncome.Text.ToString();
            String s2 = textBoxItem.Text.ToString();
            String s4 = textBoxSum.Text.ToString();
            String  s3= richTextBoxRemark.Text.ToString();
            try
            {
                if (s1 != "请选择类别" && s2 != "" && s3 != "" && s4 != "￥０")
                {
                    String strconn = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=Data.mdb" ;
                    OleDbConnection oleconn = new OleDbConnection(strconn);
                    oleconn.Open();
                    String strInsert = "INSERT INTO InOut(收支,类别,项目,备注,金额（￥）,日期)VALUES('收',s1,s2,s3,s4,System.DateTime.Now)";
                    OleDbCommand olecom = new OleDbCommand(strInsert,oleconn);
                    olecom.ExecuteNonQuary();
                    oleconn.Close();
                    DataSet ds = new DataSet();
                    BindingManagerBase myBind;
                    myBind=this.BindingContext[ds,"InOut"];

                    ds.Tables["InOut"].Rows[myBind.Position].BeginEdit();
                    ds.Tables["InOut"].Rows[myBind.Position].EndEdit();
                    ds.Tables["InOut"].AcceptChanges();


                    MessageBox.Show(s1 + "\n" + s2 + "\n" + s3 + "\n" + s4 + "\n" + "已加入数据库", "提示！");

                }
                else
                    MessageBox.Show("必须填满所有字段值！", "错误！");
            }catch(Exception me)
            {
                MessageBox.Show("保存数据记录发生"+me.ToString(),"错误！");
            }

可是，我都看了，不知道怎么办，再看看吧！