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Hi | |
I hope this helps you all get started with phonegap and sqlite in your | |
application | |
Dean-O | |
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" | |
"http://www.w3.org/TR/html4/strict.dtd"> | |
<html> | |
<head> | |
<!-- | |
This is an example that shows how to create an application that uses | |
an embedded sqlite database | |
in a mobile device (iphone,ipod,ipad,android using phonegap, jquery | |
and sqlite. | |
Your phonegap project will already contain the phonegap.js. | |
You will need to download and add to your project the jquery.min.js | |
file | |
The application will create a database called WebSqlDb with a | |
table in it called User, which contains three fields UserId, | |
FirstName and LastName | |
When the application is run the firsttime, if the local database does | |
not exist, the application | |
will create the database and the table. | |
The application shows two text boxes which you can use to add values | |
to the database using the add record button | |
The application also has a refresh button which will get the data from | |
the database and show it on the screen | |
When the application is run on the device the onBodyLoad() function is | |
called, which sets up the database and table | |
The Add Record button calls the AddValueToDB() function | |
The Refresh button calls the ListDBValues() function | |
There are a few alert statements in this application, which are only | |
there for debuggin purposes. They look like this | |
alert("DEBUGGING: followed by some text"); | |
These are only in the application to indicate where the application is | |
at when it is processing functions, etc | |
You will need to comment these out before you deploy/sell your | |
application | |
--> | |
<!-- Change this if you want to allow scaling --> | |
<meta name="viewport" content="width=default-width; user- | |
scalable=no" /> | |
<meta http-equiv="Content-type" content="text/html;charset=utf-8"> | |
<title>Embedded Sql Example</title> | |
<!-- include the next line to use phonegap javascript functions --> | |
<script type="text/javascript" charset="utf-8" src="phonegap.js"></ | |
script> | |
<!-- include the next line to use jquery functions in your application | |
you must download this and include the directory your html file is in | |
--> | |
<script type="text/javascript" charset="utf-8" src="jquery.min.js"></ | |
script> | |
<!-- main scripts used in this example --> | |
<script type="text/javascript" charset="utf-8"> | |
// global variables | |
var db; | |
var shortName = 'WebSqlDB'; | |
var version = '1.0'; | |
var displayName = 'WebSqlDB'; | |
var maxSize = 65535; | |
// this is called when an error happens in a transaction | |
function errorHandler(transaction, error) { | |
alert('Error: ' + error.message + ' code: ' + error.code); | |
} | |
// this is called when a successful transaction happens | |
function successCallBack() { | |
alert("DEBUGGING: success"); | |
} | |
function nullHandler(){}; | |
// called when the application loads | |
function onBodyLoad(){ | |
// This alert is used to make sure the application is loaded correctly | |
// you can comment this out once you have the application working | |
alert("DEBUGGING: we are in the onBodyLoad() function"); | |
if (!window.openDatabase) { | |
// not all mobile devices support databases if it does not, the | |
following alert will display | |
// indicating the device will not be albe to run this application | |
alert('Databases are not supported in this browser.'); | |
return; | |
} | |
// this line tries to open the database base locally on the device | |
// if it does not exist, it will create it and return a database | |
object stored in variable db | |
db = openDatabase(shortName, version, displayName,maxSize); | |
// this line will try to create the table User in the database just | |
created/openned | |
db.transaction(function(tx){ | |
// you can uncomment this next line if you want the User table to be | |
empty each time the application runs | |
// tx.executeSql( 'DROP TABLE User',nullHandler,nullHandler); | |
// this line actually creates the table User if it does not exist | |
and sets up the three columns and their types | |
// note the UserId column is an auto incrementing column which is | |
useful if you want to pull back distinct rows | |
// easily from the table. | |
tx.executeSql( 'CREATE TABLE IF NOT EXISTS User(UserId INTEGER NOT | |
NULL PRIMARY KEY, FirstName TEXT NOT NULL, LastName TEXT NOT NULL)', | |
[],nullHandler,errorHandler); | |
},errorHandler,successCallBack); | |
} | |
// list the values in the database to the screen using jquery to | |
update the #lbUsers element | |
function ListDBValues() { | |
if (!window.openDatabase) { | |
alert('Databases are not supported in this browser.'); | |
return; | |
} | |
// this line clears out any content in the #lbUsers element on the | |
page so that the next few lines will show updated | |
// content and not just keep repeating lines | |
$('#lbUsers').html(''); | |
// this next section will select all the content from the User table | |
and then go through it row by row | |
// appending the UserId FirstName LastName to the #lbUsers element | |
on the page | |
db.transaction(function(transaction) { | |
transaction.executeSql('SELECT * FROM User;', [], | |
function(transaction, result) { | |
if (result != null && result.rows != null) { | |
for (var i = 0; i < result.rows.length; i++) { | |
var row = result.rows.item(i); | |
$('#lbUsers').append('<br>' + row.UserId + '. ' + | |
row.FirstName+ ' ' + row.LastName); | |
} | |
} | |
},errorHandler); | |
},errorHandler,nullHandler); | |
return; | |
} | |
// this is the function that puts values into the database using the | |
values from the text boxes on the screen | |
function AddValueToDB() { | |
if (!window.openDatabase) { | |
alert('Databases are not supported in this browser.'); | |
return; | |
} | |
// this is the section that actually inserts the values into the User | |
table | |
db.transaction(function(transaction) { | |
transaction.executeSql('INSERT INTO User(FirstName, LastName) | |
VALUES (?,?)',[$('#txFirstName').val(), $('#txLastName').val()], | |
nullHandler,errorHandler); | |
}); | |
// this calls the function that will show what is in the User table in | |
the database | |
ListDBValues(); | |
return false; | |
} | |
</script> | |
</head> | |
<body onload="onBodyLoad()"> | |
<h1>WebSQL</h1> | |
<input id="txFirstName" type="text" placeholder="FirstName"> | |
<input id="txLastName" type="text" placeholder="Last Name"> | |
<input type="button" value="Add record" onClick="AddValueToDB()"> | |
<input type="button" value="Refresh" onClick="ListDBValues()"> <br> | |
<br> | |
<span style="font-weight:bold;">Currently stored values:</span> | |
<span id="lbUsers"></span> | |
</body> | |
</html> |
nice! thanks :)
Its now working, Thanks.
Is it possible to use serial data type in sqlite data base?
Does not seem to be working for me, throwing the error in alert box: Error could not prepare statement(1 no such table:User)code:5. I have copy pasted the same code given above and inserted required '.js' files. I am working on windows machine with phonegap installed on it.
Got it to work with little effort!!! @atul789, I actually saw the same error you did the first go and it was because I missed one of the errant line breaks in one of the comments in the onBodyLoad function. After I fixed that, it added the User table as designed. I would look back over your code for any improper line breaks if you haven't already.
Thanks so much for this example! I never realized so much potential was available using html5 app development and now I'm really excited to get started.
Will it work for cordova ?
Any version of the same using javascript and not jquery?
It doesn't work for me. When I click Add record or Refresh the data is not entered into the database. I've already modified all the lines etc
Finally after a week of aggravation i got this to work lol. For anyone still puzzled, you need to reformat a lot of the javascript, comment some lines out, etc. Also, make sure you download and include jquery-3.1.0.min.js and jquery-3.1.0.js in your project folder and reference them in the index.html file.
Now i have a question. I changed the <span>
tag to a <ul>
tag with the same id and it works, displaying as a numberd list. Cool. How can I have the entries in the <ul>
be links that I can click on to show that specific entry? In my form, i'm catpuring more than 2 field entries, but only want to show 1 field value in the list, then when the user clicks on that specific entry, it shows the whole entry (I hope that makes sense).
For example, user enters name, address and phone number, all entries get inserted into table but the <ul>
would only show the name. then user clicks on a name and it will show the whole entry (name, address, phone) Anyone have any ideas? Thanks in advance :)
Thanks so much. Works perfectly
This works great after the code edits, I have been scouring the internet but to no avail.
Thanks so much.
In my cordova 6.3x, it wasn't working and I was intrigued once it was working in both safari and chrome. So I read the other day about how the onClick= method was unstable, and I remove them from the inputs and wrapped all the inputs in a single form with a POST method and a submit button. Voi lá! Great code, thanks man, really appreciate.
Works great. Has anyone converted this to SQLite/phonegap? I have an existing SQLite db I want to access via a phonegap app.
hi, this example work good but i need that create a file .sql ... now i think that this database is in cache? i need a file db.sql
Thanks. for the example
sqlite is.... websql????