数据集插入记录返回0，请高手帮助

我是WINFORM ACCESS数据库 没有提示任何错误，只是返回UPDATA返回0
代码如下string cmdselect = "SELECT * FROM [base] where 0>1";
                string myConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + System.Windows.Forms.Application.StartupPath + "\\database\\esenge.mdb" + ";User ID=admin;Jet OLEDB:Database Password=lq~b819_531~by";
                OleDbConnection conn = new OleDbConnection(myConnectionString);
                
                conn.Open();
                OleDbCommand command = conn.CreateCommand();
                command.CommandText = cmdselect;  //SQL命令赋值 ，以获得结构
                //command.CommandType = CommandType.TableDirect;                OleDbDataAdapter adapter = new OleDbDataAdapter(command);
                
                
                //adapter.SelectCommand = cmdselect;
                DataSet ds = new DataSet();
                adapter.Fill(ds, cmdselect);
                adapter.TableMappings.Add("base", "base");
                DataRow dr = ds.Tables[0].NewRow(); ;
                //ds.Clear();//清除该表记录，只保留结构
                
                
                
                //DataRow dr = ds.Tables[0].NewRow();//增加新的一行；                dr[0] = nform0.Text;
                dr[1] = nform1.Text;
                dr[2] = nform2.Text;
                dr[3] = nform3.Text;
                dr[4] = nform4.Text;
                dr[5] = DateTime.Parse(nform5.Text);
                dr[6] = nform6.Text;
                dr[7] = nform7.Text;
                dr[8] = nform8.Text;
                dr[9] = nform9.Text;
                dr[10] = nform10.Text;
                dr[11] = nform11.Text;
                dr[12] = nform12.Text;
                dr[13] = nform13.Text;
                if (nform14.Text == "") { nform14.Text = "510000"; }
                dr[14] = Convert.ToUInt32(nform14.Text);
                
                dr[15] = nform15.Text;
                dr[16] = nform16.Text;
                dr[17] = nform17.Text;
                dr[18] = nform18.Text;
                dr[19] = nform19.Text;
                dr[20] = nform20.Text;
                dr[21] = nform21.Text;
                dr[22] = DateTime.Parse(nform22.Text);
                dr[23] = nform23.Text;
                dr[24] = nform24.Text;
                dr[25] = nform25.Text;
                if (nform26.Text == "")
                {
                int a = 0;
                dr[26] = a;
                }
                else {
                    dr[26] = Convert.ToUInt16(nform26.Text);
                }                dr[27] =DateTime.Parse(nform27.Text);
                dr[28] = nform28.Text;
                dr[29] = nform29.Text;
                dr[30] = nform30.Value;
                dr[31] = nform31.Text;
                dr[32] = nform32.Value;
                dr[33] = nform33.Value;
                dr[34] = nform34.Text;
                dr[35] = nform35.Text;
                dr[36] = lizhi;
                dr[37] = nform37.Value;
                if (nform38.Text == "")
                {
                    dr[38] = 0;
                }
                else { dr[38] = Convert.ToUInt16(nform38.Text); }                if (nform39.Text == "") { dr["工资"] = 0; } else { dr["工资"] = Convert.ToDecimal(nform39.Text); }                dr[40] = nform40.Text;                //adapter.UpdateCommand = mycb.GetUpdateCommand();
                OleDbCommandBuilder mycb = new OleDbCommandBuilder(adapter);                
                    ds.Tables[0].Rows.Add(dr);//这行增加一行
                adapter.Fill(ds);
                MessageBox.Show(ds.Tables[0].Rows.Count.ToString() + adapter.InsertCommand.ToString());
                try
                {                    if (adapter.Update(ds, "base") >= 1)
                    {
                        MessageBox.Show("成功");
                    }
                    else 
                    {
                        MessageBox.Show("没有成功(:");
                    }
                }
                catch( Exception err )
                {
                MessageBox.Show(err.Message);
                }
                finally
                {
                //ds.Dispose();
                //adapter.Dispose();
                conn.Close();//这里关闭数据库了
                }