progress bar while creating excel file asp.net - asp.net

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.

Related

Loop asLongAs() in Gatling using Scala

`I am trying to use a loop e.g. asLongAs() in Galing but not getting enough data on google about how to use.
My scenrio is to open a HTML page and that page takes some time to load and for that I have a css selector to check that once the report get loaded we have one css selector to check in the source code.
my code is like:
`exec (http("ABC -${ID} - Id -${ID2}")
.get("web/a/b/c/")
.check(css(.abc).saveAs("URL"))
.exec(session =\> {
val response = session("URL").as\[String\]
println(s"url is: \\n$response")
session
})
exec(http("Open the redirected report - ${ID1} Id-${ID2}")
.get(session =\> session("URL").as\[String\])
Some checks
.check(css(".Image").exists)`
I want to create a loop till this css(.Image) is loading. Because once the URL is hitting at that time this CSS doesn't appear and it takes time to load and i want to calculate that time only.
but not getting enough data on google
Have you tried the official documentation ? It has samples for Java, Scala and Kotlin.
https://gatling.io/docs/gatling/reference/current/core/scenario/#aslongas

How to implement JS infine scroll

I would like to display a table which have several thousand rows with complex formatting (color, font, border, etc. done on the ASP.Net Core server).
Initially, I generated an html copy of all the data (stored in a SQL Server database), but realised it wasn't optimal since the generated html data accounted for more than 50MB.
No, I only generate about 200 rows; 100 visible and 50 hidden above and below (cache). I would like to freely scroll the tablen, but when there are only 25 hidden rows above or below, fetch new rows from the controller which are then prepend or append to the table. Basically, I want to give enough room so I can can populate the table when I'm scrolling through the "hidden" (cache) rows.
Everything seems to work well, but I believe I need to use a web-worker to run the function in a background thread which add new rows to the table independently of the table being scrolled.
Below is a excerpt of the code :
I use a debunce function to only catch the lastest position of the mouse scroll.
The scroll function basically only checks whether there are enough hidden rows (cache) above or below the table. If it reaches the threshold, it either prepends (scroll upwards) or appends (scroll downwards) rows obtained from the controller.
The main issue is that I can't scroll the table when the new rows are being fetch as the page freezes. It only takes about 1 to 2 seconds to populate to new (scrollable) rows but it isn't smooth.
Could anyone help me improve the code? (general ideas) I also read that there are already existing libraries but can't really get my head around them..
$('#fields-table > tbody').on('wheel', _.debounce(async function (event) {
await scroll(); // Probably change it to a web-worker or promise?
}
async function scroll() {
var threshold = 200; // Corresponds to approximatively 50 rows (above and below).
var above = $('#fields-table').scrollTop();
var below = $('#fields-table > tbody').height() - $('#fields-table').height() - above;
// Gets the scroll delta based on the table heights.
var delta = 0
if (above < threshold) delta = above - threshold; // Scrolls upwards.
if (below < threshold) delta = threshold - below; // Scrolls downwards.
await addCacheRows(delta); // Prepends (delta < 0) or appends (delta > 0) or appends rows obtained via the fetch API.
}
Your problem is unlikely to resolve with a web worker. Without seeing more code I cannot tell for sure, but I suspect your code to generate new rows is not sufficiently efficient. Remember:
Use DocumentFragment to create the HTML, do not immediately append it to the main DOM tree row by row. Appending elements to a document triggers some recalculations.
Unless this is a LOT of data or requires lots of work serverside, you can immediately start preloading next/previous rows. Keep the promise object and only await it once you need them, that's the simplest way to go around it
Use passive scroll event listener - Firefox even shows a console warning whenever you do not do that
There is no way generating 200 rows of table data should take seconds. Since you use JQuery anyway (really, in 2022?), note that there are plugins for this. I don't remember what I used, but it worked perfect and scrolled smooth with much more data than what you have.
Thank you for your help. I realise it won't be as straightforward as I initally thought (I made some tests with WPF virtualization as well).
Regarding the time it takes to generate the extra rows, I believe it mostly comes from the server. Sure, I can probably load new rows independently of the threshold.
I've never heard about DocumentFragment, but that something I should definitely consider.

How to add time widget/picker?

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]))

Qualtrics.SurveyEngine.addOnload runs twice in preview mode in Qualtrics survey software

Whenever I try to test a Qualtrics survey in preview mode, Qualtrics.SurveyEngine.addOnload will be called twice. This is not a problem for conditional events (as in most of the examples), but a large problem for unconditional code a timed page change (this will be triggered twice as well). See the following snippet:
Qualtrics.SurveyEngine.addOnload(function()
{
$('NextButton') && $('NextButton').hide();
var that = this;
var timeOutInterval=1000+Math.trunc(Math.random()*10000);
alert(timeOutInterval); //for Testing only
var myVar;
myVar = setTimeout(function(){ that.clickNextButton();}, timeOutInterval);
});
If I launch the survey, this will lead to a page change after 1-11 seconds. If I preview the survey, this change will happen as well, followed by a second change. The alert will be shown twice as well.
Does anyone have a solution, how this functionality could be tested in preview mode?
I've run into Survey Preview issues with JFE as well. There are ways to get around JFE mode and preview in non-JFE mode.
If only care about a specific set of questions in a block and don't care about the survey flow, the easiest solution is to use View Block. It does not use JFE. Go to the Block drop down and choose View Block.
If you need to preview the whole survey, there are tricks to 'break' JFE and force it to non-JFE mode. These tricks seem to be a moving target as Qualtrics makes changes. The best one (easiest) I've found that is working for me today on my Qualtrics account (notice all the qualifiers) is to add an end of survey object to the survey flow, click custom, and check the "Override Survey Options" box.
If that doesn't work, I've found that once a survey gets over a certain size, it doesn't use JFE mode anymore. I don't know what the limit is, but if you add a bunch of fake questions after your end of survey you can trick it that way as well.
Qualtrics links jQuery as of current writing (albeit the shorthand $ is reserved for the prototype.js library).
Following should skip execution of addOnload javascript in the mobile preview:
Qualtrics.SurveyEngine.addOnload(function()
{
if(jQuery(this.questionContainer).parents('.MobilePreviewFrame').length)
{
console.log('Mobile Preview - skipping rest of addOnload');
return true;
};
console.log("Running addOnload()");
// The rest of your code. Log statements can obviously be removed
});
Hope this is helpful
It seems Qualtrics now defaults to JFE mode for live surveys as well. We have been able to resolve this by adding the query string &Q_JFE=0 to the end of our survey URLs, like so:
https://uleidenss.eu.qualtrics.com/SE/?SID=SV_123432434343&Q_JFE=0
This had the additional benefit of solving our issue with JFE mode breaking several of our long time running Qualtrics JQuery experiments.

Flex slow first Http request

When i use loader.load(request); for the first time, my flex freeze for 10 secondes before posting the data (i can see the web server result in real time).
However if redo a similar POST with other data but same request.url, it's instantaneous.
// Multi form encoded data
variables = new URLVariables();
variables.user = "aaa";
variables.boardjpg = new URLFileVariable(data.boardBytes, "foo.jpg");
request = new URLRequestBuilder(variables).build();
request.url = "http://localhost:8000/upload/";
loader.load(request);
How can i see what is taking so long ?
Thanks !
Ok, this is an old question, anyway I find it searching for other things so quick adding this
URLFileVariables nor URLRequestBuilder are core classes in AS3, so I guess you're using some custom library to build your request. I don't know which library you use, but it seems that the purpose is to serialize some binary data to build a POST. Serializing usually takes some times the first time (lookup initialization and the like) and goes faster next, a well known example is Remoting in his different flavours

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