ORA-01036: 非法变量名/编号,oracle的特有错误

婉9843

　　Oracle特有的错误，sqlserver是用@来表示变量，Oracle居然用:，小弟真是服了，这种错误，是个人就找不出来。
　　
　　string connstr = DbHelperOra.connectionString;
            OracleConnection conn = new OracleConnection(connstr);
            conn.Open();
            string sqlstr = "select count(*) from t_dm_gy_swry where swry_dm=:username and userpassword=:pwd";
            OracleCommand cmd = new OracleCommand(sqlstr, conn);
            cmd.Parameters.AddWithValue(":username", username);
            cmd.Parameters.AddWithValue(":pwd", pwd);
　　string i=Convert.ToString(cmd.ExecuteOracleScalar());
      
            if (i.Equals("1"))
            {
                Model.T_DM_GY_SWRY t=new Model.T_DM_GY_SWRY();
                string strsql="select * from t_dm_gy_swry where swry_dm=:username";
                OracleParameter[] myParm = new OracleParameter[] { new OracleParameter(":username",OracleType.VarChar,100)};
　　myParm[0].Value = username;
                DataSet ds = DbHelperOra.Query(strsql,myParm);
                DataRow dr = ds.Tables[0].Rows[0];
                t.MC = dr["MC"].ToString();
                return t;
　　}
            else
            {
                return null;
            }
            conn.Close();