我正在开发一个使用phonegap的应用程序,我正在使用数据库作为sqlite。 我创建使用下面的命令表:每当phonegap结果集长度增加SQLite数据库
var dbb;
var shortName = 'Vaccine1';
var version = '2.0';
var displayName = 'vaccine';
var maxSize = 100000;
dbb = window.openDatabase(shortName, version, displayName,maxSize);
和插入的值使用此功能
function AddDBvalues()
{
dbb.transaction(function(tx){
//tx.executeSql('DROP TABLE IF EXISTS Vaccin',nullHandler,nullHandler);
tx.executeSql('CREATE TABLE IF NOT EXISTS Vaccin(Vday INTEGER NOT NULL,VName TEXT NOT NULL, CCountryid INTEGER NOT NULL , Sex TEXT NOT NULL)', [],nullHandler,errorHandler);},errorHandler,successCallBack);
dbb.transaction(function(transaction) {transaction.executeSql('INSERT INTO Vaccin(Vday,VName,CCountryid,Sex) VALUES (?,?,?,?)',["0","BCG","91","both"], nullHandler,errorHandler);});
dbb.transaction(function(transaction) {transaction.executeSql('INSERT INTO Vaccin(Vday,VName,CCountryid,Sex) VALUES (?,?,?,?)',["0","OPV dose 1 of 5","91","both"], nullHandler,errorHandler);});
dbb.transaction(function(transaction) {transaction.executeSql('INSERT INTO Vaccin(Vday,VName,CCountryid,Sex) VALUES (?,?,?,?)',["1","Hepatites B dose 1 of 2","91","both"], nullHandler,errorHandler);});
dbb.transaction(function(transaction) {transaction.executeSql('INSERT INTO Vaccin(Vday,VName,CCountryid,Sex) VALUES (?,?,?,?)',["42","DPT dose 1 of 3","91","both"], nullHandler,errorHandler);});
dbb.transaction(function(transaction) {transaction.executeSql('INSERT INTO Vaccin(Vday,VName,CCountryid,Sex) VALUES (?,?,?,?)',["42","OPV dose 2 of 5","91","both"], nullHandler,errorHandler);});
dbb.transaction(function(transaction) {transaction.executeSql('INSERT INTO Vaccin(Vday,VName,CCountryid,Sex) VALUES (?,?,?,?)',["70","DPT dose 2 of 3","91","both"], nullHandler,errorHandler);});
}
..而且使用该功能来从数据库中获得valuse ..
function ShowValue()
{
var cnn = sessionStorage.getItem('cid');//getting from session
var cn=parseInt(cnn);
alert (cn); //always show correct value
dbb.transaction(
function (transaction) {
transaction.executeSql("SELECT * from Vaccin WHERE CCountryid='"+cn+"';",[], dataHandler, errorHandler);});
function dataHandler(transaction, results){
alert("first method" + results.rows.length);
for (var i=0; i<results.rows.length; i++) {
...... }
}}
我得到一个意想不到的错误是结果集的长度每次增加 意味着如果运行应用程序第一次它显示正确的值,当我运行我t再次显示resultset = results.rows.length + results.rows.length的长度意味着每次都是double等。
如果有人知道发生了什么问题,请帮助我。
是AddDBValues每次被调用。但如果我使用“IF NOT EXISTS”,则不应每次创建表格。我对吗?? –
感谢它的工作.. –