【正文】 ataAdapter, so as to keep the data in the memory bining with DataSet object. DataAdapter object can hide the details that links up with Connection and Command. DataAdapter object allow to put the data to the data source ( DataSource )which gets from DataSet can also take out data from data source. By the same way,it can also operate the bottom data preserved by adding ,deleting or modifing. Database in joining The analysis of a example which visit the database of SQL SERVER in technology [ abstract ] With the thorough that applied along with distributed database, permanent database connection consumes resource fairly. When visiting the database of SQL SERVER, it can solve this problem perfectly with ADO . NET technology . This paper primarily discusses Net the major object of , and analyse the course of visiting SQL SERVER furtherly. [ keyword ] ADO. NET visit XML independently Drawing the bottom graph of the map, add new picture layer according to the fuction of defined , Setting picture layer visibility and so on: / / constructs function function FlashMap ( width: Number, height: Number, Geo_x: Number, Geo_y: Number ) { layersCount = 0。 layers=new Array()。 stageWidth=width。 stageHeight=height。 x=Geo_x。 y=Geo_y。 Map_mc=(Map_mc,0)。 (Map_mc,200)。 } //create object Map = new FlashMap( stagewidth, stagehight, Mapx, Mapy)。 //Loading map function initMap () { Map. drawMap ()。} The information inquiry of the map datas:The inquiry of datais was mainly carried out by the click of mouse and the choose of frame on the flash which is loaded with the line,the point and the side of layer .We can see whether the field of the mouse choosing contain the object data through querying the courrent layer of the picture ,if exiting,to return the inquiry result in the new Form simplyand show it to the user. The code of the script of mouse option: Function select ( ) { var selectedRegion: Array。 selectedRegion=new Array()。 for(j=0。j。 j++){var coverLayer:MapLayer= [j]。 for(i=0。i。 i++){var Region:MapRegion=MapRegion( [i])。 if((,)){(coverLayer)。 (Region)。 } } } III. The practice of concluding remarks proves , in database the campus geography information that doesn39。t request too high, development data to lose paratively demonstrate aspect, this is a kind of practical feasible , development the easy method with cheap cost. Besides, with the work electronic map colour of this kind of method produce pletion, it is rich , content much shape, if wander the work electronic map plane of fictitious realistic technology and this kind of produce method that bines and can e true the environment of campus geography with space wander. This kind of work electronic map demonstrate effect is traditional GIS software which is nearly impossible to reach , in campus situation demonstrate and construct subdistrict demonstrate etc. field ,this kind of method have greater develop potential. 中文一譯文： 技術 是 Microsoft 為解決 Web 和分布式應用程序問題而設計的。作為一種數(shù)據(jù)庫訪問框架 , 能處理當今 N 層的 Web 應用程序所要求的非連接數(shù)據(jù)體系結構 , 因而在訪問 SQL SERVER數(shù)據(jù)庫時 , 性能優(yōu)越 , 得到了廣泛應用。本文對此進行了討論。 一、 的主要對象 中有很多對象與 ADO 中的對象功能相似 , 但 中對象的功能更強大。同時 , 除 Connection、 Parameter、 Command 對象外 還添加了許多新的對象和程序化接口 , 如 DataSet 、 DataView、 DataAdapter、 DataReader、DataSetCommand 等 , 使得對數(shù)據(jù)庫的操作更簡單。 DataSet 對象 : DataSet 是 的核心 , 是專門用來處理從數(shù)據(jù)存儲中讀出的數(shù)據(jù) , 并以離線方式存在于本地內(nèi)存中?？梢允褂孟嗤姆绞絹聿僮鲝牟煌瑪?shù)據(jù)來源取得的數(shù)據(jù) , 不管底層的數(shù)據(jù)庫是 SQL Serv