SQL脚本带参数,嵌入式写法 C#

        public bool UpdateCaseInfo(Dictionary<string, object> Str, long caseId)
        {
            using (DbManager db = DbFactory.DB)
            {
                string updateStr = "";
                List<IDbDataParameter> paraS = new List<IDbDataParameter>();
                foreach (var item in Str)
                {
                    updateStr += item.Key + "=@" + item.Key+ ",";
                    paraS.Add(db.Parameter("@" + item.Key, item.Value));                   
                }
                updateStr = updateStr.Remove(updateStr.Length - 1);
                updateStr = "update dbo.T_table set " + updateStr + " where CaseID=‘" + caseId.ToString() + "‘";
                return db.SetCommand(updateStr, paraS.ToArray()
                    ).ExecuteScalar<bool>();
            }
        }