连接oracle提示无效数字错误?!
string l_cj=this.TextBox1.Text;
OracleConnection conn = new OracleConnection("User Id=real;Password=real;Data Source=fc");
conn.Open(); // 连接数据库
string strCmd =("select a.bsit,a.barea,b.ownernum from fc_room a, fc_owner b where a.ownerid=b.ownerid and rownum=1 and a.earthnum||'/'||a.blocknum||'/'||a.housenum||'/'||a.roomnum="+l_cj);
OracleDataAdapter da = new OracleDataAdapter(strCmd,conn);
OracleCommandBuilder cb = new OracleCommandBuilder(da);
DataSet ds = new DataSet();
da.Fill(ds);
DataTable tab = ds.Tables[0]; // 获取DataTable
this.bsit.Text=ds.Tables["bsit"].ToString();
da.Fill(ds);这句提示无效数字错误。。。