Why jqgrid URL is invoked only one time? - asp.net-mvc-4

I have a javascript function in which i receive a value of drop down. function is below:
function SetTemplateId(id) // this method is called on drop down change event
{
templateId=id; // template id is global variable
showjqgrid(); //this method show the Jqgrid
}
ShowJqgrid method is below
function showjqgrid()
{
$("#grid").jqGrid({
datatype: 'json',
url: '/Home/DynamicGridData?id='+templateId,
........
}
jqgrid is works fine but the problem is when "setTemplateid" function is called first time it works fine and data is show correctly and after first time when i change drop down value the "setTemplateId" function is called(i checked by alert()) and showgrid is also called but the URL is not invoked. If i destroy jqgrid in "setTemplateId" function then jqgrid is not shownn. If i reload jqgrid then also the data show only first time. I debuged it. Only first time action method is called. After that its not called. What is the problem?

The reason is very easy. The function showjqgrid convert empty table <table id="grid"></table> in relatively complex structure of divs and tables. After that jqGrid makes request to the url.
So you have two main options (alternatives) to fix the problem:
include call of GridUnload method as the first line of showjqgrid. It will destroy the complex structure of divs and tables created previously and reduce there to one empty <table>.
you can create grid once. On the next time you should update url parameter using setGridParam and then trigger reloadGrid which will update the content of the grid holding the outer part unchanged.
Additionally I would recommend you to read the old answer which shown how to use postData parameter of jqGrid where the properties are defined as functions. I suppose that templateId which you use as the value of id parameter of url will be evaluated in some way inside of dropdown change event. So you can consider to do this inside of the function defined inside of postData.id. In the case you could use url: '/Home/DynamicGridData and the part ?id='+templateId will be appended by jqGrid.

Related

Aurelia Validation and event publish not updating values in View

I was using Event aggregate publish method to update view from another view. when I created publish and subscribe data was able to get in view model , but that is not updating in view with assigned variables. If I use JavaScript to fill value it's working but not able to trigger validate controller.
Expected result is:
From the subscribe method I have to fill the view values.
After that it should trigger validate on value changes.
In below gist run I have two view and view-model. One is registration-form and second one is data-form. In data-form I have table with data, on click of each row I am publishing one event with selected row data, and this published event I was subscribing in side of registration-form view-modal. For more details look into below gist run.
Gist run: https://gist.run/?id=8416e8ca1b9b5ff318b79ec94fd3220c
Two possible solutions: (to your "undefined" alert)
Change alert(this.email); to alert(myself.email);
Use the thick arrow syntax for the subscribe function. Change:
this.ea.subscribe('MyrowData', function(obj){
to
this.ea.subscribe('MyrowData', obj => {
This syntax allows the new function to preserve the context/scope of the parent, which means that this.email will still be accessible.
Another suggestion:
You could simplify your data-form.js function as follows:
Change:
this.eventAggregator.publish('MyrowData', this.items[this.items.indexOf(item)]);
to:
this.eventAggregator.publish('MyrowData', item);
This will work because you've already provided item in your function call click.delegate="PopulateData(item, $event)".
In fact, you could even delete $event and event from the two PopulateData definitions (in data-form.js and data-form.html).
When I implement these suggestions, your data is also validated correctly.

Aurelia: Trigger update on one custom element when a value in another custom element changes?

I've just recently asked a question ( Refreshing i18n translated string interpolated values in Aurelia ) regarding how to refresh i18n string interpolated values when a select input field (with language ids) changes. I received a great answer, however now I realized that there was another requirement.
It's not only string interpolated values that needs to be refreshed.
In my page-specific templates I have some select fields (custom elements), which gets their option values from injecting a "service" class. That service is responsible for doing the http fetch request, and returning a promise to the select field (custom element).
Now here's the problem. When the global (language) select field from my site-wide nav-bar custom element changes, and i18n refreshing happens using the notification approach proposed in the link above. How would I then also re-fetch my different select input custom elements inside the template, but with the new language id from the language select in the nav-bar?
The only solution I know so far is to do window.location (router.navigate(sameroute) didn't trigger a refresh) and refresh the current page whenever the language select changes, however that's obviously not a great way to handle this.
I'll try to see if I can put together a plunkr, since all this may sound a little confusing.
#chrismbeckett from in https://gitter.im/Aurelia/Discuss gave me this hint:
"For those types of inter-component syncs, use the EventAggregator.
Pub a 'lang-changed' event and let any component do what it needs to
update itself"
So in nav-bar.js i did this:
let payload = { 'lngId': this.appLngId};
this.eventAggregator.publish('lang_changed', payload);
and in the custom element which were to be refreshed I put this inside the attached() function:
this.eventAggregator.subscribe('lang_changed', payload => {
alert(payload.lngId)
self.myTodosService.getMyTodos(payload.lngId);
.then(function(data){
self.myTodos = data;
})
});

Yii2 Gridview get all selected row for all pagination

I wrapped my gridview with Pjax widget like this
\yii\widgets\Pjax::begin();
gridview
\yii\widgets\Pjax::end();
in order to make the gridview make ajax request when I click on each pagination.
I also use ['class' => 'yii\grid\CheckboxColumn'], in column as well.
and I find that when I'm on first pagination I checked some rows and then go to second page and check some rows but when I go back to first page what I've checked is gone.
My question is how can I keep all checkedrow for all pagination
With current conditions (Pjax, multiple pages, yii\grid\CheckboxColumn) it's impossible because of the way it works.
When you click on the pagination links all GridView html content is replaced by new one that comes from the AJAX response.
So obviously all selected checkboxes on the previous page are gone.
Few possible ways to solve that:
1) Write custom javascript and server side logic.
As one of the options, you can send AJAX request to server with parameter meaning that user has chosen to select all data for the bulk delete operation (or use separate controller action for bulk deletion). In this case actually we don't need to get the selected data from user, because we can simply get them from database (credits - Seng).
2) Increase number of displayed rows per page.
3) Use infinite scroll extension, for example this.
4) Break desired action in several iterations:
select needed rows on first page, do action (for example, delete).
repeat this again for other pages.
You can get selected rows like that:
$('#your-grid-view').yiiGridView('getSelectedRows');
[infinite scroll] : http://kop.github.io/yii2-scroll-pager/ will work good if you do not have any pjax filters. If you have filters also in play, do not use this plugin as it does not support pjax filters with it. For rest of the applications it is perfect to use.
Update1 : it seems to be straight forward than expected, here is the how I accomplished it
Add following lines to the checkbox column
'checkboxOptions' => function($data){
return ['id' => $data->id, 'onClick' => 'selectedRow(this)'];
}
Now add following JS to the common js file you will have in your project of the page where this datagrid resides
var selectedItems=[]; //global variable
/**
* Store the value of the selected row or delete it if it is unselected
*
* #param {checkbox} ele
*/
function selectedRow(ele){
if($(ele).is(':checked')) {
//push the element
if(!selectedItems.includes($(ele).attr('id'))) {
selectedItems.push($(ele).attr('id'));
}
} else {
//pop the element
if(selectedItems.includes($(ele).attr('id'))) {
selectedItems.pop($(ele).attr('id'));
}
}
}
Above function will store the selected row ids in the global variable array
Now add following lines to pjax:end event handler
$(document).on('pjax:end', function () {
//Select the already selected items on the grid view
if(!empty(selectedItems)){
$.each(selectedItems, function (index,value) {
$("#"+value).attr('checked',true);
});
}
});
Hope it helps.
I just solved this problem and it works properly with Pjax.
You may use my CheckboxColumn. I hope this can help. The checked items are recorded with cookies.
You can read the part with //add by hezll to understand how to fix it, because I didn't provide a complete general one.
Hope it works for you.
https://owncloud.xiwangkt.com/index.php/s/dGH3fezC5MGCx4H

web2py SQLFORM accepting too fast

I have a web2py SQLFORM that gets generated and returned by an AJAX call and the form is put in a DIV I defined.. I want that SQLFORM to be an update form, not an insert form. The problem is the form immediately runs it's accept function once it is written to that DIV. This doesn't happen if the form is for inserting, only updating. That initial accept fails and hitting the submit button does not allow for a second accept.
I don't know why the accept fails or why it happens immediately.
heres the JavaScript function that makes the AJAX call
function displayForm(currID){
//Remove everything from the DIV we want to use
$('#window').empty();
//Call the ajax to bring down the form to update the series
ajax('{{=URL('newForm')}}/'+currID,
[], 'window');
}
And here is the newForm controller
def newSerForm():
record = db.myTable(request.args[0])
form = SQLFORM(db.myTable, record, fields=['series_name','image_thumbnail'])
if form.accepts(request.vars,session):
print 'Series update successful!'
else:
print 'Series update Failed...'
return form
displayForm is fired by clicking a button and once you do the form accepts and fails and the submit button doesn't work again. Is there a way to make an SQLFORM do this? The weird thing is if I change this to make inserts into myTable, it works fine. It behaves exactly as it should. But doing it this way doesn't work.
Ok now this is where it gets weird.
I tried to achieve the same functionality here with a totally different approach, an iFrame. I made new functions in my controllers that create the form based on request.args[0]. looks like this
def editEntry():
print request.args[0]
record = db.myTable(request.args[0])
form = SQLFORM(db.CC_user_submission, record, fields=['series_name', 'image_thumbnail']).process()
return dict(form=form)
And then a corresponding HTML page that just displays form. What could be simpler right? I go to that page based on a link that gives the correct argument. Take me to a page with a form for updating. Updating works perfect. Great, now lets put it in an iFrame instead of linking to it. I put it in an iFrame on the original page. Open up the iFrame. Doesn't work. I have no idea what is going is there any part of an explanation to this?
By using the iFrame method I actually got this one to work. Since it required an iFrame to be appended with jQuery which needs quotes and the iFrame URL which also needs quotes, the notation got pretty confusing but it's doable. Looked like this:
var myURL = "{{=URL('editEntry')}}/"+idArg.toString();
$('#window').append("<iframe src = " + myURL + " width='450' height='400'> </iframe>");
It's not pretty but it works.

In-place editable field in web grid

I'm trying to add an in-place editable field to a web grid like this:
WebGrid new
columnNames: #('Test');
columnAspects: #(nil);
column: 1 addBlock: [:o | WebInPlaceEditableText aspect: #test for: o];
collection: self objects.
However, when pointing my browser to the page containing this element, I get:
Too late to add page headers, page is already streaming to response!
Add the following code at the beginning of the method where your code resides:
ScriptaculousLibrary ensure
This library initialization call is otherwise done automatically by WebInPlaceEditableText but because in your case it resides in a block which is executed late in page streaming phase, when a page is already composed, this error occurs. Therefore the manual library initialization is needed.