So I know how to store and retrieve data in a local database (Chrome). My function to retrieve data is
function SelectHandler(transaction, results) {
for (var i = 0; i < results.rows.length; i++) {
var row = results.rows.item(i);
var customer = new Object();
customer.id = row['id'];
customer.fname = row['fname'];
customer.lname = row['lname'];
}
}
I know how to assign the values from the function above to textboxes/labels etc but how do I create options in a dropdownlist with for example text first name and value id? I want to be able to select a name in the dropdown and then populate a textbox with the related last name (simplified example).
Thanks in advance.
for (var i = 0; i < results.rows.length; i++) {
var row = results.rows.item(i);
var newFeature = new Object();
newFeature.id = row['id'];
newFeature.name = row['name']
$('#ddlPatients').append(
$('<option></option>').val(newFeature.id).html(newFeature.name)
);
}
Related
I'm not sure how to change this query in google app maker language
var query = app.models.folders.newQuery();
query.filters.requestId._equals = request;
query.filters.filecount._equals = null;
var total = 0;
var recx = query.run();
So right now it is the equivalent of
select * from folders
where requestID = request
and filecount = null
But I would like to know if there is a way to change it to the equivalent of
select * from folders
where requestID = request
and (filecount = null or filecount < 0)
Maybe by using query.where?
You could try by just adding another filter to your query:
var query = app.models.folders.newQuery();
query.filters.requestId._equals = request;
query.filters.filecount._equals = null;
query.filters.filecount._lessThan = 0;
var total = 0;
var recx = query.run();
When I click on a userlist, the function addTab is triggered:
private var counter:int = 0;
public function addTab():void {
var new vBox:VBox = new VBox();
var textBox:RichEditableText = new RichEditableText();
var nameEm:String = "dynamicTextBox" + counter;
textBox.id = nameEm;
counter++;
var textFlow:TextFlow = new TextFlow();
vbox.addChild(textFlow);
vbox.addChild(textBox);
tabNavigator.add(vBox);
}
In another function, I would like to add Rich Text to the newly created TextBox, but I can not access it.
I tried getChildByName(vbox) and vbox.getChildByName(textBox), but that doesn't seem to work.
To get childbyname assigned a name to richeditable text and if you want to get it by counter then give name to vbox also, as in the sample here:
private var counter:int = 0;
public function addTab():void {
var new vBox:VBox = new VBox();
var textBox:RichEditableText = new RichEditableText();
var nameEm:String = "dynamicTextBox" + counter;
textBox.id = nameEm;
vBox.name=nameEm;
textBox.name=nameEm;
counter++;
var textFlow:TextFlow = new TextFlow();
vbox.addChild(textFlow);
vbox.addChild(textBox);
tabNavigator.add(vBox);
}
If you know the index then
var vb:VBox = tabNavigator.getChildByName("dynamicTextBox"+index) as VBox;
var txt:RichEditableText=vb.getChildByName("dynamicTextBox"+index) as VBox;
So this will give you RichEditableText.
Or if you want to get access just after adding in to tab then return RichEditableText from the addtab function.
Elaborating on my comment, the idea is that you do something like this:
private var counter:int = 0;
public function addTab():void {
var new vBox:VBox = new VBox();
vBox.name = "dynVbox" + counter;
var textBox:RichEditableText = new RichEditableText();
textBox.name = "dynamicTextBox" + counter;
var textFlow:TextFlow = new TextFlow();
textFlow.name = "dynamicTextFlow" + counter;
vbox.addChild(textFlow);
vbox.addChild(textBox);
tabNavigator.add(vBox);
counter++;
}
Now, outside this function, you just need to know the counter number of the vBox you want. So for example:
var myBox = tabNavigator.getChildByName('dynVbox'+ 32).getChildByName('dynamicTextBox'+32)
Without seeing more of your code, I don't know if this is the best way to go about it, but if you want to mark your boxes with some dynamically generated name and look them up later, this will work
Example documentation
I have a checkbox list i have which i have bound some document name to it's text field.now i need to find only the checkboxes which the text contains the .pdf extension and check them all in a single checkbox click.i have written the following javascript but it doesn't work for me
function CheckAllPDF() {
var checkBoxList = document.getElementById("<%= cblFiles.ClientID %>");
var checkBoxes = checkBoxList.getElementsByTagName("input");
for (i = 0; i < checkBoxes.length; i++) {
var string = checkBoxes[i].parentNode.getElementsByTagName('label').innerHTML;
var match = string.indexOf(".pdf");
if (match != -1) {
checkBoxes[i].checked = true;
}
else {
checkBoxes[i].checked = false;
}
}
can some one help?
When you put an asp.net check box list in the page it is translated to a list of input of type checkbox so you need to access each control and check it so you javascript code should look like:
//Get the main id of the asp.net check box list
var checkboxId = '<%= CheckBoxList1.ClientID %>';
//Loop on all generated input check boxes where the count function determine the number of generated checkboxes
for (var i = 0; i < <%= Count() %>; i++) {
//Append the count on the main asp.net check box id the value ('_'+i)
var checkBox = document.getElementById(checkboxId + '_' + i);
var checkBoxValue = checkBox.value;
var match = checkBoxValue.indexOf(".pdf");
if (match != -1) {
checkBox.checked = true;
}
else {
checkBox.checked = false;
}
}
And in your code behind write the count function as follows:
public int Count()
{
return CheckBoxList1.Items.Count;
}
i'm loading several sound files, and want to error check each load. however, instead programming each one with their own complete/error functions, i would like them to all use the same complete/error handler functions.
a successfully loaded sound should create a new sound channel variable, while an unsuccessfully loaded sound will produce a simple trace with the name of the sound that failed to load. however, in order to do this, i need to dynamically create variables, which i haven't yet figured out how to do.
here's my code for my complete and error functions:
function soundLoadedOK(e:Event):void
{
//EX: Sound named "explosion" will create Sound Channel named "explosionChannel"
var String(e.currentTarget.name + "Channel"):SoundChannel = new SoundChannel();
}
function soundLoadFailed(e:IOErrorEvent):void
{
trace("Failed To Load Sound:" + e.currentTarget.name);
}
-=-=-=-=-=-=-=-=-
UPDATED (RE: viatropos)
-=-=-=-=-=-=-=-=-
can not find the error.
TypeError: Error #1009: Cannot access a property or method of a null object reference. at lesson12_start_fla::MainTimeline/loadSounds() at lesson12_start_fla::MainTimeline/frame1():
//Sounds
var soundByName:Object = {};
var channelByName:Object = {};
var soundName:String;
var channelName:String;
loadSounds();
function loadSounds():void
{
var files:Array = ["robotArm.mp3", "click.mp3"];
var i:int = 0;
var n:int = files.length;
for (i; i < n; i++)
{
soundName = files[i];
soundByName[soundName] = new Sound();
soundByName[soundName].addEventListener(Event.COMPLETE, sound_completeHandler);
soundByName[soundName].addEventListener(IOErrorEvent.IO_ERROR, sound_ioErrorHandler);
soundByName[soundName].load(new URLRequest(soundName));
}
}
function sound_completeHandler(event:Event):void
{
channelName = event.currentTarget.id3.songName;
channelByName[channelName] = new SoundChannel();
}
function sound_ioErrorHandler(event:IOErrorEvent):void
{
trace("Failed To Load Sound:" + event.currentTarget.name);
}
You can do this a few ways:
Storing your SoundChannels in an Array. Good if you care about order or you don't care about getting them by name.
Storing SoundChannels by any name in an Object. Good if you want to easily be able to get the by name. Note, the Object class can only store keys ({key:value} or object[key] = value) that are Strings. If you need Objects as keys, use flash.utils.Dictionary, it's a glorified hash.
Here's an example demonstrating using an Array vs. an Object.
var channels:Array = [];
// instead of creating a ton of properties like
// propA propB propC
// just create one property and have it keep those values
var channelsByName:Object = {};
function loadSounds():void
{
var files:Array = ["soundA.mp3", "soundB.mp3", "soundC.mp3"];
var sound:Sound;
var soundChannel:SoundChannel;
var i:int = 0;
var n:int = files.length;
for (i; i < n; i++)
{
sound = new Sound();
sound.addEventListener(Event.COMPLETE, sound_completeHandler);
sound.addEventListener(IOErrorEvent.IO_ERROR, sound_ioErrorHandler);
sound.load(files[i]);
}
}
function sound_completeHandler(event:Event):void
{
// option A
var channelName:String = event.currentTarget.id3.songName;
// if you want to be able to get them by name
channelsByName[channelName] = new SoundChannel();
// optionB
// if you just need to keep track of all of them,
// and don't care about the name specifically
channels.push(new SoundChannel())
}
function sound_ioErrorHandler(event:IOErrorEvent):void
{
trace("Failed To Load Sound:" + event.currentTarget.name);
}
Let me know if that works out.
//Load Sounds
var soundDictionary:Dictionary = new Dictionary();
var soundByName:Object = new Object();
var channelByName:Object = new Object();
loadSounds();
function loadSounds():void
{
var files:Array = ["robotArm.mp3", "click.mp3"]; //etc.
for (var i:int = 0; i < files.length; i++)
{
var soundName:String = files[i];
var sound:Sound=new Sound();
soundDictionary[sound] = soundName;
soundByName[soundName] = sound;
sound.addEventListener(Event.COMPLETE, sound_completeHandler);
sound.addEventListener(IOErrorEvent.IO_ERROR, sound_ioErrorHandler);
sound.load(new URLRequest(soundName));
}
}
function sound_completeHandler(e:Event):void
{
var soundName:String=soundDictionary[e.currentTarget];
channelByName[soundName] = new SoundChannel();
}
function sound_ioErrorHandler(e:IOErrorEvent):void
{
trace("Failed To Load Sound:" + soundDictionary[e.currentTarget]);
}
//Play Sound
channelByName["robotArm.mp3"] = soundByName["robotArm.mp3"].play();
//Stop Sound
channelByName["robotArm.mp3"].stop();
I have a requirement to convert LINQ to DataTable.
I stole the following Extension Method from StackOverflow:
public static DataTable ToDataTable<T>(this IEnumerable<T> items)
{
var tb = new DataTable(typeof(T).Name);
PropertyInfo[] props =
typeof(T).GetProperties(BindingFlags.Public
| BindingFlags.Instance);
foreach (var prop in props)
{
tb.Columns.Add(prop.Name, prop.PropertyType);
}
foreach (var item in items)
{
var values = new object[props.Length];
for (var i = 0; i < props.Length; i++)
{
values[i] = props[i].GetValue(item, null);
}
tb.Rows.Add(values);
}
return tb;
}
When the table contains null values it throws exception.
(i.e)
DataSet does not support System.Nullable<>
Comission (Decimal type) column contains null value)
at
tb.Columns.Add(prop.Name, prop.PropertyType);
How to fix it?
Here's a pimped version:
public static DataTable ToDataTable<T>(this IEnumerable<T> items) {
DataTable table = new DataTable(typeof(T).Name);
PropertyInfo[] props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
foreach (var prop in props) {
Type propType = prop.PropertyType;
// Is it a nullable type? Get the underlying type
if (propType.IsGenericType && propType.GetGenericTypeDefinition().Equals(typeof(Nullable<>)))
propType = new NullableConverter(propType).UnderlyingType;
table.Columns.Add(prop.Name, propType);
}
foreach (var item in items) {
var values = new object[props.Length];
for (var i = 0; i < props.Length; i++)
values[i] = props[i].GetValue(item, null);
table.Rows.Add(values);
}
return table;
}
Edit: Modified my code a bit, tested it, it works! :)
You could check for null, and then store DBNull.Value as the value instead. There is an MSDN article about null values, that specifically calls out the lack of support for Nullable<> by Datasets.
Where you have
values[i] = props[i].GetValue(item, null);
make it
var value = props[i].GetValue(item, null);
values[i] = value ?? ((object)DBNull.Value);