asp.net 插入数据时出现错误！

这是数据库插入的语句。。     
  string check =Request["ckblb"];
        if (ddlyhlx.SelectedValue == "1")
        {

            SqlOper oper = new SqlOper();
            DataTable dt = oper.RetQueryStringData("insert into cj_irs_sys_user(VC_ID,VC_YHMC,VC_YHZH,VC_PSW,I_DQ,I_LX,VC_BSLX,VC_LXR,VC_LXDH,VC_EMAIL,VC_BZ) values('02222','" + txtyhmc.Text + "','" + txtyhzh.Text + "','" + txtpsd.Text + "',3,1,'" + Request["ckblb"] + "','" + txtlxr.Text + "','" + txtlxdh.Text + "','" + txtemail.Text + "','" + txtbz.Text + "')");

            Response.Redirect("user_main.aspx");
         
        }


这是方法
    public DataTable RetQueryStringData(string strsql)
    {
        //XmlDocument result = new XmlDocument();
        sqlda = new OracleDataAdapter(strsql, sqlcon);
        ds = new DataSet();
        sqlda.Fill(ds);
        //resul