Get DevExtreme DropDownBox Selected Values [closed] - asp.net-core

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I use multi select DevExtreme DropdownBox in View and fill it from model
but I can't get selected values in controller on Post method
how I can read selected values?

I got a #Html.HiddenField then filled the hiddenfield value in below js function:
function getSelectedItemsKeys(items) {
var result = [];
items.forEach(function (item) {
if (item.selected) {
result.push(item.key);
}
if (item.items.length) {
result = result.concat(getSelectedItemsKeys(item.items));
}
});
$("#myHF").val(result);
return result;
}
then send hidden field to controller by view model.

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why can i not call a function of my vue component in my callback [closed]

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i am use datatables and jquery in vue and
> <script>
> export default {
> methods: {
> ddd() {
> alert(44444444);
> },
> },
> mounted: function () {
> let table = new DataTable("#tbl", {});
> $("#tbl tbody").on("click", "tr", function () {
> this.ddd();
> });
> },
> };
> </script>
why ddd() is not work please help me
Your issue is lexical scoping. the callback method you're provided is an anonymous function which redeclares the value of this. To solve it, use a fat arrow.
$("#tbl tbody").on("click", "tr", () => {
this.ddd();
});

more elegant way to set state [closed]

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In the following function is there a more elegant or best practice way to setState?
startStop(){
if(this.state.start === 'Start') startStop = 'Stop'
else startStop = 'Start'
this.setState({start:startStop})
}
for the flag, instead of string Start/Stop use true-false,
Eg:-
constructor(props){
this.state={
start:false
}
}
startStop(){
this.setState({start:!this.state.start})
}
render(){
return<Text>{this.state.start?'Running':'Stopped'}</Text>
}
If you had something like:
state = {
keepGoing: false,
}
Then you could do the following to toggle:
this.setState({ keepGoing: !this.state.keepGoing });
this.setState({start:this.state.start==='Start' ? 'Stop' : 'Start'})

Yii2 data provider for rest api call [closed]

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Currently I'm using the yii2 array dataprovider for listing the datas from rest api. We have more than 10k records. Each rest api call can get only maximum 100 records, If we want more i need to give the limit and offset for this rest api call.
Is there any specific rest api dataprovider in yii2? else how can i implement pagination for this rest API?
dataprovider, in Yii2 has support for pagination. Suppose, your service receives it's params with the following code:
$params = Yii::$app->getRequest()->post();
You could include page parameter in the request, and then do a little hack (:P), like :
if (isset($params ['page'])) {
$_GET['page'] = (int) $params ['page'];
if ($_GET['page'] < 1) {
$_GET['page'] = 1;
}
}
Once you do that, your dataprovider automatically assigns the value of $_GET to it's result set. An example of dataprovider:
$dataProvider = new ActiveDataProvider([
'query' => Users::find(),
'pagination' => array('pageSize' => 10),
]);
Or, in your case:
$dataProvider = new ArrayDataProvider([
'allModels' => $query->from('post')->all(),
'sort' => [
'attributes' => ['id', 'username', 'email'],
],
'pagination' => [
'pageSize' => 10,
],
]);
To get the models, you could use getModels() method of dataprovider like following:
$models = $dataProvider->getModels();
Let me know if that solves your problem.

How to write html custom attribute in less use Mixins [closed]

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how to write html custom attribute in .less Use Mixins for example
[margin="2"]{margin:2px;}
You should explain why you want to use Less in this situation. Notice that Less only compiles static CSS.
You can use a Less mixin to dynamically built your CSS rules:
.createmargins(#i) {
& when (#i > 1) {
.createmargins(#i - 1);
}
[margin="#{i}"] { margin: unit(#i,px); }
}
.createmargins(100);
outputs:
[margin="1"] {
margin: 1;
}
[margin="2"] {
margin: 2;
}
[margin="3"] {
margin: 3;
}
and so on......
Demo: http://codepen.io/anon/pen/yyXEgg
The above possible generates a lot of unused CSS classes. Alternatively consider using jQuery (or jvascript) on DOM ready:
$("[margin]").each(function(){
$(this).css('margin',$(this).attr('margin') + 'px');
});
Demo: http://codepen.io/anon/pen/rawKjz

What Charting API / Tool is this? [closed]

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What Charting API / Tool is this?
http://wordpress.org/extend/plugins/multiple-post-thumbnails/stats/
The pie chart at least is an svg canvas inside of an iframe. i am confused what they are using, but I like it.
image http://img38.imageshack.us/img38/6513/picturets.png
google.load("visualization", "1", {packages: ["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
jQuery.getJSON('http://api.wordpress.org/stats/plugin/1.0/multiple-post-thumbnails?callback=?', function (data) {
draw_graph(data, 'version_stats', 'Active Versions');
});
}
function draw_graph(versions, id, title) {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Version');
data.addColumn('number', 'Usage');
var count = 0;
jQuery.each(versions, function (key, value) {
if (Number(value) > 1) {
data.addRow();
data.setValue(count, 0, key);
data.setValue(count, 1, Number(value));
count++;
}
});
var chart = new google.visualization.PieChart(document.getElementById(id));
chart.draw(data, {width: 360, height: 240, title: title});
}
It looks like they are using Google's charting API: http://code.google.com/apis/chart/interactive/docs/index.html