cmd.ExecuteReader();//查询似乎存在延时性，即已经修改的记录值，但查询的还是老记录。 如下代码中，CallNum已经update，但是查询的结果有延时？？？？？ string strSql = "select * from " + TableName1 + " where CCharacter='" + iString[i] + "'"; OleDbCommand cmd = new OleDbCommand(); cmd.Connection = conn; cmd.CommandText = strSql; OleDbDataReader reader = cmd.ExecuteReader(); if (reader.Read()) { ID = Convert.ToInt32(reader["ID"]); CallNum = Convert.ToInt32(reader["CallNum"]); WordString = reader["WordString"].ToString(); } //----修改访问次数 string strSql1 = "update " + TableName1 + " set CallNum='" + (CallNum+1) + "' where ID=" + ID; int num= d.AccessOperation(strSql1);