AIR SQL 学习笔记(20080229)
29 二 2008
AIR 本地数据为SQLite，
applicationDirectory 路径为 %APPDATA%\appName\
applicationStorageDirectory路径为 %APPDATA%\appName\Local Store\
%APPDATA% 为系统环境变量，默认为 %SystemDrive%\Documents and Settings\%USERNAME%\Application Data
appName为AIR应用程序名称
组织出了一个基础的SQL类库。方便今后常用数据库操作。
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package { import com.cbmland.data.SQL; import flash.display.Sprite; import flash.events.ErrorEvent; import flash.events.Event; import flash.filesystem.File; import flash.text.TextField; public class SQL_test extends Sprite { var sql:SQL= new SQL() var _textField:TextField=new TextField() public function SQL_test() { sql.addEventListener(SQL.RESULT,sql_RESULT) sql.addEventListener(SQL.ERROR,sql_ERROR) sql.open(File.applicationStorageDirectory.resolvePath("DBSample.db")) //尝试创建数据库以及一个表 var sqlText= "CREATE TABLE IF NOT EXISTS employees (" + " empId INTEGER PRIMARY KEY AUTOINCREMENT, " + " firstName TEXT, " + " lastName TEXT, " + " salary NUMERIC CHECK (salary > 0)" + ")"; query(sqlText) //插入一个记录 sqlText="INSERT INTO employees (firstName, lastName, salary) " + "VALUES ('Bob', 'Smith', 8000)"; query(sqlText) //查询 sqlText='SELECT * FROM employees ' query(sqlText) _textField.multiline=true _textField.width= stage.stageWidth _textField.height= stage.stageHeight this.addChild(_textField) } private function query(text:String){ sql.text=text sql.execute() } private function view_RESULT(result):void { if(result.data!=null){ var numRows:int = result.data.length; for (var i:int = 0; i < numRows; i++) { var output:String = ""; for (var columnName:String in result.data[i]) { output += columnName + ": " + result.data[i][columnName] + "; "; } trace("row[" + i.toString() + "]\t", output); _textField.appendText("row[" + i.toString() + "] "+output+'\n') } // if(!result.complete){sql.next()} }else if(result.rowsAffected>0){ trace(result.lastInsertRowID) } } private function sql_RESULT(event:Event){ var result=(event.target.getResult()) view_RESULT(result) } private function sql_ERROR(event:ErrorEvent){ trace("Error message:", event['error'].message); trace("Details:", event['error'].details); } } } |
AIR SQL 学习笔记(20080229) (9.8 KiB, 220 hits)
