AIR数据处理的方法

 

AIR连接sqllite的方法，这里主要是做了数据的插入和删除的方法

<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
        preinitialize="init()"
        fontSize="12" backgroundColor="#FFFFFF" width="600" height="700">
        <mx:Script>
                <![CDATA[
                        import flash.data.SQLConnection;
                        import flash.events.SQLErrorEvent;
                        import flash.events.SQLEvent;
                        import flash.filesystem.File;
                        
                        private var conn:SQLConnection;
                        private var initComplete:Boolean = false;
                        private var sqlStat:SQLStatement;
                        
                        private function init():void{
                        //新建sqlConnection                
                        conn = new SQLConnection();
                        //不知道flash什么时候才能做成多线程..这样写起来真的很累                        
                        conn.addEventListener(SQLEvent.OPEN, openHandler);
                        conn.addEventListener(SQLErrorEvent.ERROR, errorHandler);
                        //获取当前目录                        
                        var dbFile:File = File.applicationResourceDirectory.resolvePath("DBSample.db");
                        //打开sql连接
                        conn.open(dbFile);                        
                        }
                        
                        //连接后对数据库进行初始化，初始化脚本可以是*.sql，这里就不做这种处理了
                        private function openHandler(event:SQLEvent):void
                        {
                                //初始化sqlStatement对象
                            sqlStat = new SQLStatement();
                                sqlStat.sqlConnection = conn;
                                var sql:String =         "CREATE TABLE IF NOT EXISTS employees (" + 
                                                                    "    empId INTEGER PRIMARY KEY AUTOINCREMENT, " + 
                                                                    "    firstName TEXT, " + 
                                                                    "    lastName TEXT, " + 
                                                                    "    salary NUMERIC CHECK (salary > 0)" + 
                                                                    ")";
                                sqlStat.text = sql;
                                sqlStat.addEventListener(SQLEvent.RESULT, statResult);
                                sqlStat.addEventListener(SQLErrorEvent.ERROR, createError);
                                sqlStat.execute();                        
                        }
                        private function statResult(event:SQLEvent):void
                        {
                                //很无耻地强迫获取数据时更新数据
                            var sqlresult:SQLResult = sqlStat.getResult();                                
                                if(sqlresult.data == null){
                                        getResult();
                                        return;                                        
                                }
                                datafiled.dataProvider = sqlresult.data;
                        }
                        //获取数据函数
                        private function getResult():void{
                                var sqlquery:String = "SELECT * FROM employees"
                                excuseUpdate(sqlquery);                                
                        }
                        private function createError(event:SQLErrorEvent):void
                        {
                            trace("Error code:", event.error.code);
                            trace("Details:", event.error.message);
                        }
                        
                        private function errorHandler(event:SQLErrorEvent):void
                        {
                            trace("Error code:", event.error.code);
                            trace("Details:", event.error.message);
                        }
                        //数据更新接口
                        private function excuseUpdate(sql:String):void{
                                sqlStat.text = sql;
                                sqlStat.execute();
                        }                        
                        //插入操作
                        private function insertemp():void{
                                var sqlupdate:String = "Insert into employees(firstName,lastName,salary) values('" + 
                                                firstName.text + 
                                                "','" + 
                                                lastName.text + 
                                                "','" + 
                                                salary.text + 
                                                "')";
                        debug.text+=sqlupdate+"\n"                                                
                                excuseUpdate(sqlupdate)
                        }
                        //删除操作
                        private function deleteemp():void{
                                var sqldelete:String = "delete from employees where empId='" + 
                                                datafiled.selectedItem.empId + 
                                                "'";
                                excuseUpdate(sqldelete);
                                debug.text+=sqldelete+"\n"                                
                        }
                        
                ]]>
        </mx:Script>
        <mx:TextArea x="21" y="10" width="402" height="179" id="debug"/>
        <mx:DataGrid x="21" y="197" id="datafiled">
                <mx:columns>
                        <mx:DataGridColumn headerText="ID" dataField="empId"/>
                        <mx:DataGridColumn headerText="firstName" dataField="firstName"/>
                        <mx:DataGridColumn headerText="lastName" dataField="lastName"/>
                        <mx:DataGridColumn headerText="salary" dataField="salary"/>
                </mx:columns>
        </mx:DataGrid>
        <mx:Form x="21" y="471">
                <mx:FormItem label="firstName">
                        <mx:TextInput id="firstName"/>
                </mx:FormItem>
                <mx:FormItem label="lastName">
                        <mx:TextInput id="lastName"/>
                </mx:FormItem>
                <mx:FormItem label="salary">
                        <mx:TextInput id="salary"/>
                </mx:FormItem>
        </mx:Form>
        <mx:Button x="300" y="503" label="添加" click="insertemp()"/>
        <mx:Button x="300" y="533" label="删除" click="deleteemp()"/>
</mx:WindowedApplication>