I was wondering if it's possible to add seconds to a clock in vb.net. I mean lt's say I have a label and I assign it to DateTime.Now(), how would I show/display the time with the seconds "ticking"?
I assume you're talking about ASP.NET and not a desktop app. In which case you're going to have to use JavaScript to update the user interface as once the time is set from the server side you can't update it. See this:
http://www.w3schools.com/js/tryit.asp?filename=tryjs_timing_clock
Related
I am setting local notifications to fire at specific time in Xamarin.Android application. It all works but the set time seems to be little off, set time comes from user input (with minute precision). When setting notifications further in the future (days later) the notification fired at the next minute than it should have.
Below is my current code to calculate time. calendarEvent.StartTime is a DateTime property.
TimeSpan span = calendarEvent.StartTime - DateTime.Now;
manager.Set(AlarmType.ElapsedRealtime,(long)(SystemClock.ElapsedRealtime() + span.TotalMilliseconds),pendingIntent);
I would like to know how to accurately calculate the time so that notifications would fire at the start of the minute they are supposed to. In the current code they fire in the middle of the minute or later.
If you really need precision try to use the SetExact() method of the alarm manager class.
TimeSpan span = calendarEvent.StartTime - DateTime.Now;
manager.SetExact(AlarmType.ElapsedRealtime,(long)(SystemClock.ElapsedRealtime() + span.TotalMilliseconds),pendingIntent);
And I don't know if it is relevant, but if you are using events for a calendar maybe you should use RTC, since AlarmType.RTC is based on the clock, whereas AlarmType.ElapsedRealTime is based on the time passed since the device was turned on.
I am using Change Feed processor library to read the Change Feed on a partitioned collection and below is the code for how I have configure it. I ma using most of the default options.
ChangeFeedProcessorOptions feedProcessorOptions = new
{
LeaseRenewInterval = TimeSpan.FromSeconds(15),
};
var docObserverFactory = DocumentFeedObserverFactory.Create(this.destinationCollectionInfo, this.dbRepository);
this.builder
.WithHostName(hostName)
.WithFeedCollection(this.monitoredCollectionInfo)
.WithLeaseCollection(this.leaseCollectionInfo)
.WithProcessorOptions(feedProcessorOptions)
.WithObserverFactory(docObserverFactory);
This runs fine as long as the Change Feed application is running and documents are being inserted/updated in the collection and the Change Feed app picks them up as expected.
The problem happens when I stop the Change Feed app for sometime and insert/update few documents in the Collection. Then when I start the Change Feed app, it doesn't pick changes from where it last left. Those changes that were inserted when the Change Feed app was stopped are lost. But when I set the flag StartFromBeginning to true, it picks everything from the start including changes that were inserted when the Change Feed app was stopped in between for sometime.
My understanding of read from current (StartFromBeginning to false) is that the Change Feed reads documents since it last left. But that doesn't seem to happen. Please help.
There are two ways to continue from exactly where you left it.
The first, and more accurate one, is to store the Continuation token of the last thing you read. That way you can specify it when you start again and it will win over both the StartTime and the StartFromBeginning flags.
The second one is to provide the StartTime property which will try and find the continuation token of a given time automatically. It has an approximate 5 second precision so there is a chance that you might miss some documents though.
New appmaker user here.
I'm trying to port the work permits approval "app" I made with G Suite form+spreadsheet+GAS; users should enter the day, the start and end time of the permit.
I can see from the Forum Sample that the Date field type is a DateTime field type, so I can use it in my model.
The problem is I cannot find the time picker in the widgets, and the date box has no option to also enter the time.
Am I missing something?
Time Pickers for App Maker
I read your question and thought I'd try to role one of my own and this is what I came up with. I put all of the buttons on a pageFragment and call it with app.showDialog(app.pageFragments.timePicker2);
I only use clientside script.
function updateOutput(){
var h=app.pageFragments.TimePicker2.properties.hour||'00';
var m=app.pageFragments.TimePicker2.properties.minute||'00';
var s=app.pageFragments.TimePicker2.properties.second||'00';
var t=h + ':' + m + ':' + s;
app.pageFragments.TimePicker2.descendants.timeLBL.text=t;
return t;
}
function updateHour(v){
app.pageFragments.TimePicker2.properties.hour=v;
updateOutput();
}
function updateMinute(v){
app.pageFragments.TimePicker2.properties.minute=v;
updateOutput();
}
function updateSecond(v){
app.pageFragments.TimePicker2.properties.second=v;
updateOutput();
}
Here's what my time picker looks like:
Yes. Adding all of the buttons is a nuisance but there are a few features about AppMaker that make it more tolerable.
First you can assign the TimePicker form properties which I use as global properties. I had three hour,minute and second.
Then after you add all of the hour buttons you can grab all of them at one time by clicking each one while holding down control on a windows machine and click on the onClick event and pick custom action and type this in updateHour(widget.text); the code completion won't give you text as an option but type it any way.
I just figured out how to grab the buttons all a one time by pushing shift and selecting with the mouse
Do the same thing with the minute and second buttons using updateMinute(widget.text) and updateSecond(widget.text); This saves you a lot of time typing all of the functions into each widget control panel. Also you don't have to bother giving all of the buttons special names like I did.
But you might like to format them with the following css.
And again you can grab all of the buttons at one time and change the following setting:
That way you can style all of the buttons at one time.
My save button just copies the final string into a label on the main panel.
app.pages.Testing.descendants.timeLBL2.text=app.pageFragments.TimePicker2.descendants.timeLBL.text;
app.closeDialog();
You will probably want to do something more elegant.
Here's a demo: in preview mode. Sorry about the 24 hour clock. I always use this for my own stuff because it's so much easier and I like it. You'll probably want AM & PM. I'll probably go back and do that too.
For an AM/PM Picker I used these functions:
function updateOutputAP(){
var h=app.pageFragments.TimePicker3.properties.hour||'00';
var m=app.pageFragments.TimePicker3.properties.minute||'00';
var s=app.pageFragments.TimePicker3.properties.second||'00';
var ap=app.pageFragments.TimePicker3.properties.ap||' ';
var t=h + ':' + m + ':' + s + ' ' + ap;
app.pageFragments.TimePicker3.descendants.timeLBL.text=t;
return t;
}
function updateHourPM(v){
app.pageFragments.TimePicker3.properties.hour=v;
app.pageFragments.TimePicker3.properties.ap='PM';
updateOutputAP();
}
function updateHourAM(v){
app.pageFragments.TimePicker3.properties.hour=v;
app.pageFragments.TimePicker3.properties.ap='AM';
updateOutputAP();
}
function updateMinuteAP(v){
app.pageFragments.TimePicker3.properties.minute=v;
updateOutputAP();
}
function updateSecondAP(v){
app.pageFragments.TimePicker3.properties.second=v;
updateOutputAP();
}
And this is what my picker looks like:
Now that I know how to pick the components easily with the mouse it was a break to make this change.
Three AppMaker Time Pickers:
At this time App Maker doesn't provide out of the box Time or Date/Time picker widgets, it means that you need to implement one by yourself. There are at least two ways to accomplish this task:
App Maker way
Wait and hope when App Maker will introduce Time or Date/Time picker widget or use existing App Maker widgets to emulate Time Picker. Calendar Sample can be a good starting point:
Hack into DOM/JS
If you have no concerns about cross-browser compatibility and you are OK to get you hands dirty with DOM manipulation by javascript, creating events listeners and other cool stuff, then you can play with HTML widget and native date/time or time input, or even some third party library.
One simple option would be to simply use a textbox and set the validation in the model field.
You can update your Date object on save or just use as is depending on your application. You get the benefit of auto validation errors in the UI to guide your user and it takes only seconds to set up.
Regex:
\b((1[0-2]|0?[1-9]):([0-5][0-9]) ([AaPp][Mm]))
I've got a ASP.net page that create an excel file using eeplus library (http://epplus.codeplex.com/). my problem is that I create a really big file. It take times to be done and showed to the client. I search a way to show a kind of progressbar of the creation.
for the moment, the client click and wait til the file is created, so I cant really showed something.
What you're trying to do is actually pretty complicated. You might just want to show a spinning wheel gif or something and save yourself the headache.
However, if you're feeling adventurous, read on.
To use a progress bar, you need to create a way to measure how much % complete your task is. This usually involves some kind of incrementer that gets measured against the total number of rows/column/whatever that you're creating. I don't know what language you're using, so here's some pseudo to help you out:
var totalRows = 100;
var processedRows = 0;
var progress = 0;
while( processedRows < totalRows ){
Process_A_Row();
processRows++;
progress = processedRows / totalRows;
StoreProgressSomewhereForPolling();
}
So there's your basic mechanism for tracking progress. On the client, you'll need to set up a way to poll the value of the progress variable. This gets messy because you'll quickly learn that you need a way to isolate the progress variable for every individual request. Its up to you how to implement this -- there are lots of ways to do it. One solution I saw stored the progress value in a static dictionary keyed by username so that it could be easily polled by the client with webmethods.
A quick solution would be to use the Ajax.NET UpdateProgress control. Just display a GIF that spins while the server is processing.
guys!
I'm developing an online auction with time limit.
The ending time period is only for one opened auction.
After logging into the site I show the time left for the open auction. The time is calculated in this way:
EndDateTime = Date and Time of end of auction;
DateTime.Now() = current Date and Time
timeLeft= (EndDateTime - DateTime.Now()).Seconds().
In javascript, I update the time left by:
timeLeft=timeLeft-1
The problem is that when I login from different browsers at the same time the browsers show a different count down.
Help me, please!
I guess there will always be differences of a few seconds because of the server processing time and the time needed to download the page.
The best way would be to actually send the end time to the browser and calculate the time remaining in javascript. That way the times should be the same (on the same machine of course).
Roman,
I had a little look at eBay (they know a thing or two about this stuff :)) and noticed that once the item is inside the last 90 seconds, a GET request gets fired every 2 seconds to update the variables in the javascript via a json response. you can look at this inside firebug/fiddler to see what it does.
here is an example of the json it pulls down:
{
"ViewItemLiteResponse":{
"Item":[
{
"IsRefreshPage":false,
"ViewerItemRelation":"NONE",
"EndDate":{
"Time":"12:38:48 BST",
"Date":"01 Oct, 2010"
},
"LastModifiedDate":1285932821000,
"CurrentPrice":{
"CleanAmount":"23.00",
"Amount":23,
"MoneyStandard":"£23.00",
"CurrencyCode":"GBP"
},
"IsEnded":false,
"AccessedDate":1285933031000,
"BidCount":4,
"MinimumToBid":{
"CleanAmount":"24.00",
"Amount":24,
"MoneyStandard":"£24.00",
"CurrencyCode":"GBP"
},
"TimeLeft":{
"SecondsLeft":37,
"MinutesLeft":1,
"HoursLeft":0,
"DaysLeft":0
},
"Id":160485015499,
"IsFinalized":false,
"ViewerItemRelationId":0,
"IsAutoRefreshEnabled":true
}
]
}
}
You could do something similar inside your code.
[edit] - on further looking at the eBay code, altho it only runs the intensive GET requests in the last 90 seconds, the same json as above is added when the page is initially loaded as well. Then, at 3 mins or so, the GET request is run every 10 seconds. therefore i assume the same javascript is run against that structure whether it be >90 seconds or not.
This may be a problem with javascript loading at different speeds,
or the setInterval will trigger at slightly different times depending on the loop
i would look into those two