Kendo ui Multi Select Remove Selected element using value - kendo-ui

I am using kendo ui multiple select
http://demos.kendoui.com/web/multiselect/events.html
i have this code
var data =
[
{ text: "Africa", value: "1" },
{ text: "Europe", value: "2" },
{ text: "Asia", value: "3" },
{ text: "North America", value: "4" },
{ text: "South America", value: "5" },
{ text: "Antarctica", value: "6" },
{ text: "Australia", value: "7" }
];
var multi = $("#select").kendoMultiSelect({
dataTextField: "text",
dataValueField: "value",
dataSource: data
}).data("kendoMultiSelect");
now i can add the values using this
multi.value(["5", "3"]);
now i want to remove from the selected values
is there any way to remove the values using value or text
for example if i want to remove 5 then is there any method like multi.remove(["5"]);
or any other way to remove it???

For removing element from a MultiSelect programmatically, you can use:
// Elements to be removed
var subtract = ["1", "5"];
// Get copy of current selected elements
var values = multi.value().slice();
// Remove elements from subtract
values = $.grep(values, function(a) {
return $.inArray(a, subtract) == -1;
});
// Clean filtering
multi.dataSource.filter({});
// Set new values
multi.value(values);
Where subtract are the elements to be removed (in this example "1" and "5").
TIP: For adding, you can use:
// Elements to add
var add = ["4", "5"];
// Get copy of current selected elements
var values = multi.value().slice();
// Merge withe elements to add
var merge = $.merge(values, add);
// Clean filtering
multi.dataSource.filter({});
// Remove duplicates and set them back
multi.value($.unique(merge));
Running example in here : http://jsfiddle.net/OnaBai/9WfGA/

This is already answered but this mught help someone. I had the same issue, wanted to remove values but didn't had the values to remove. This helped me out. It will remove all the selected values from dropdown
Add a css class to page
.hide-selected > li.k-state-selected {
display: none;
}
and add this code to pageload
var multiselect= $("#select").data("kendoMultiSelect");
multiselect.ul.addClass('hide-selected');

Related

Cant get a grouped kendo ui column chart to hide when some items in group don't have a value

I've been trying to get a telerik kendo ui column chart to display grouped data but where the groups might not have entries for all possible values and I don't want to show space/empty columns in these empty cases.
Telerik dojo of problem
Is anyone aware of anyway to get this to work more like the screenshot below
Excel has grouped the data but doesn't display a column at all if the data is null/zero
I couldn't find a built-in way to do this, so I ended up just placing the bars manually by overriding the visual function. In my case, I only needed to move one bar and that bar will always be the same category, which made it a whole lot easier in that I only had to identify it by matching the category. I could then move it with a transform. You cannot move it by setting the coordinates because the visual has already been created.
It would be more complex to do this dynamically, but it's certainly possible. This may give someone a start in the right direction.
One downside of this method is that you must also place the labels manually, which I have also done below. You can override the visual function of the labels, as well, but no references to any other elements are passed with the event data. Note how the documentation says the sender field may be undefined; in my experience, this is always the case.
It also does not move the tooltip or the highlight. You could use the same method to move the highlight (override the visual function, though on the series instead of the seriesDefaults) and draw the tooltip manually while moving the highlight -- similar to how the method below draws the label while moving the column.
Telerik Dojo Example
$(document).ready(function () {
$("#chart").kendoChart({
legend: { visible: false },
tooltip: { visible: false },
categoryAxis: {
name: "categoryAxis",
categories: ["1", "2", "3"],
},
series: [
{
data: [1, 2, 3],
highlight: { visible: false },
},
{
data: [1.5, null, 3.5],
highlight: { visible: false },
}
],
seriesDefaults: {
type: "column",
labels: { visible: false },
visual: function (e) {
if (e.value === null) return;
var visual = e.createVisual();
var axisRect = e.sender.getAxis("categoryAxis").slot("2");
var group = new kendo.drawing.Group();
var label = new kendo.drawing.Text(e.value, [0, 0], {
font: "20px sans-serif",
fill: { color: "black" }
});
var lbox = label.clippedBBox();
label.position([
e.rect.origin.x + e.rect.size.width / 2 - lbox.size.width / 2,
e.rect.origin.y - label.bbox().size.height * 1.5
]);
group.append(visual, label);
if (e.category === "2") {
var x = (axisRect.origin.x + axisRect.size.width / 2) - e.rect.size.width / 2;
group.transform(kendo.geometry.transform().translate(x - e.rect.origin.x, 0));
}
return group;
},
}
});
});

Filter Kendo Dropdownlist values within a kendo grid row based on value from another row

I have Kendo Grid, inside which I have dropdown input [editable]. Now I want to filter the values in dropdown based on value present in row next to it. For ex:
_________________________________________
Column 1 | Column 2 (this is a dropdown)
_________________________________________
A | Show only values relevant to A
__________________________________________
B | Show values relevant to B
_____________________________________________
C | Show values relevant to C
_________________________________________
you can do the following
On editing the row get the name from the first column
filter the second column based on the first column value
In the given sample below, I edited an existing sample provided by the Kendo UI for cascading dropdowns, so I wrote extra codes to get the Id of the first column, so in your case you can exclude the additional steps
The HTML needed
<div id="grid"></div>
The scripts needed
<script>
// array of all brands
var brands = [
{ brandId: 1, name: "Ford" },
{ brandId: 2, name: "BMW" }
];
// array of all models
var models = [
{ modelId: 1, name: "Explorer", brandId: 1},
{ modelId: 2, name: "Focus", brandId: 1},
{ modelId: 3, name: "X3", brandId: 2},
{ modelId: 4, name: "X5", brandId: 2}
];
$("#grid").kendoGrid({
dataSource: {
data: [
{ id: 1, brandId: 1, modelId: 2 }, // initial data item (Ford, Focus)
{ id: 2, brandId: 2, modelId: 3 } // initial data item (BMW, X3)
],
schema: {
model: {
id: "id",
fields: {
id: { editable: false }, // the id field is not editable
brandId: {editable: false}
}
}
}
},
editable: "inline", // use inline mode so both dropdownlists are visible (required for cascading)
columns: [
{ field: "id" },
{
// the brandId column
title: "Brand",
field: "brandId", // bound to the brandId field
template: "#= brandName(brandId) #", // the template shows the name corresponding to the brandId field
},
{
//The modelId column
title: "Model",
field: "modelId", // bound to the modelId field
template: "#= modelName(modelId) #", //the template shows the name corresponding to the modelId field
editor: function(container) { // use a dropdownlist as an editor
var input = $('<input id="modelId" name="modelId">');
input.appendTo(container);
input.kendoDropDownList({
dataTextField: "name",
dataValueField: "modelId",
//cascadeFrom: "brandId", // cascade from the brands dropdownlist
dataSource: filterModels() // bind it to the models array
}).appendTo(container);
}
},
{ command: "edit" }
]
});
function brandName(brandId) {
for (var i = 0; i < brands.length; i++) {
if (brands[i].brandId == brandId) {
return brands[i].name;
}
}
}
function brandId(brandName) {
for (var i = 0; i < brands.length; i++) {
if (brands[i].name == brandName) {
return brands[i].brandId;
}
}
}
function modelName(modelId) {
for (var i = 0; i < models.length; i++) {
if (models[i].modelId == modelId) {
return models[i].name;
}
}
}
// this function will be used by the drop down to filter the data based on the previous column value
function filterModels()
{
// bring the brand name from previous column
var brandName = $('#modelId').closest('td').prev('td').text();
// additional work in this sample to get the Id
var id = brandId(brandName);
// filter the data of the drop down list
var details= $.grep(models, function(n,i){
return n.brandId==id;
});
return details;
}
</script>
here a working demo
hope it will help you

How to set default value in Kendo DropDownList

I have a Kendo DropDownList, but strangely enough I can not set its initial value.
Html.Kendo().DropDownList()
.Name("PersonalCoachName")
.BindTo(new SelectList((List<string>)ViewData["coachResources"]))
.HtmlAttributes(new { style = "font-size:8pt;" })
ViewData["coachResources"] is a List of string type. Regardless I use
.BindTo(new SelectList((List<string>)ViewData["coachResources"], "Default"))
or
.SelectedIndex(3)
DropDownList does not change it value and only display the 1st value in the list. I need help on this. Thanks.
The value works only in jquery, not in html helper. So it works in Jquery like
var dropdownlist = $("#PersonalCoachName").data("kendoDropDownList");
dropdownlist.value(coachId);
dropdownlist.refresh();
Use the Value-method. See example code below.
#(Html.Kendo().DropDownList()
.Name("DropDownListName")
.DataTextField("Text")
.DataValueField("Value")
.BindTo(model.DropDownListItems)
.Value(model.Selected)
)
EDIT:
DropDownList needs to be bind to List<SelectListItem> and it can be initialized as seen below.
var items = new List<SelectListItem>
{
new SelectListItem { Text = "Item0", Value = "0" },
new SelectListItem { Text = "Item1", Value = "1" }
};
In addition, I would recommend to use MVVM to attach it to view.
public class DropDownViewModel
{
public String Selected;
public List<SelectListItem> DropDownListItems;
public DropDownViewModel(String selected, List<SelectListItem> dropDownListItems)
{
Selected = selected;
DropDownListItems = dropDownListItems;
}
}
Use the property 'index' while initializing the kendo combobox to set the Default value.
$("#fabric").kendoComboBox({
autoWidth: true,
dataTextField: "text",
dataValueField: "value",
dataSource: [
{ text: "Cotton", value: "1" },
{ text: "Polyester", value: "2" },
{ text: "Cotton/Polyester", value: "3" },
{ text: "Rib Knit", value: "4" }
],
filter: "contains",
suggest: true,
index: 3
});
There are two ways to set default value when initializing a kendo dropdown list.
$("#yourdropdownlist").kendoDropDownList({
dataTextField: "valueName",
dataValueField: "valueCode",
dataSource: [
{ valueName: "A", valueCode: "0" },
{ valueName: "B", valueCode: "1" }
],
//Method 1 -set index
//index: 0
//Method 2 - set default value and text
value: "0",
text:"行政区划"
});
This was my dropdown:
#(Html.Kendo().DropDownList()
.HtmlAttributes(new { style = "width:95%", id = "customerSelection" })
.Name("customers-dropdown")
.DataTextField("Text")
.DataValueField("Value")
.BindTo(Model)
.OptionLabel("Select Customer...")
)
I wanted to select the default option "Select Customer..." upon some function. I was able to do this using following code:
var dropdownBox = $("#customerSelection").data("kendoDropDownList");
dropdownBox.text("");
dropdownBox.value("");

Kendo grid resizable column width

The grid columns may be resizable. I want to store user-adjusted columns width and restore them when the next session starts.
The best way to store columns width I've found is the following:
var element = $('#grid').kendoGrid({
...
resizable: true,
columnResize: function(e) {
var state = {};
this.columns.every(function(c,i) {
state[c.field] = c.width;
return true;
});
var state_txt = JSON.stringify(state);
localStorage['profile_userprofile_grid_column_width'] = state_txt;
}
}
Now I want to restore column width saved in the previous user session. I can read columns width from the storage:
var state = JSON.parse(localStorage['profile_userprofile_grid_column_width']);
Does somebody know some elegant way to apply these values back to the grid if it is already created at this time? The resize handle does it internally, so it is possible, but the code doing it in the grid source is ugly.
You can trigger the columnResize event post initilisation as shown below
function grid_columnResize(e) {
// Put your code in here
console.log(e.column.field, e.newWidth, e.oldWidth);
}
$("#grid").kendoGrid({
columns: [
{ field: "name" },
{ field: "age" }
],
dataSource: [
{ name: "Jane Doe", age: 30 },
{ name: "John Doe", age: 33 }
],
resizable: true
});
var grid = $("#grid").data("kendoGrid");
grid.bind("columnResize", grid_columnResize);
Documentation
This is an old question, but here is what we have. Function handles column widths and groups.
var _updateResultsGridColumns = function(columns, groups) {
var kendoGrid = $resultsGrid.data("kendoGrid");
if (kendoGrid) {
kendoGrid.setOptions({
columns: columns,
});
var dataSource = kendoGrid.dataSource;
dataSource.group(groups);
kendoGrid.setDataSource(dataSource);
}
}

How to get kendo ui grid sort event?

I currently have a Kendo-UI grid. It has a few column where user can sort on, works great. I also have a details link on each row, so if the user clicks on this they are taken to a details page. I need to pass the current sort into the details page as a value. How can I get the current sort? is there an event I can bind to?
Thanks
You can get the sorting configuration whenever you want using sort method.
Example: Being grid the id of your Grid. Do:
// Get the grid object
var grid = $("#grid").data("kendoGrid");
// Get the datasource bound to the grid
var ds = grid.dataSource;
// Get current sorting
var sort = ds.sort();
// Display sorting fields and direction
if (sort) {
for (var i = 0; i < sort.length; i++) {
alert ("Field:" + sort[i].field + " direction:" + sort[i].dir);
}
} else {
alert("no sorting");
}
I ran into this need today and learned that the event is now present as of 2016 R3 release (2016.3.914).
Example usage:
<div id="grid"></div>
<script>
$("#grid").kendoGrid({
columns: [
{ field: "name" },
{ field: "age" }
],
dataSource: {
data: [
{ id: 1, name: "Jane Doe", age: 30 },
{ id: 2, name: "John Doe", age: 33 }
],
schema: {
model: { id: "id" }
}
},
sortable: true,
sort: function(e) {
console.log(e.sort.field);
console.log(e.sort.dir);
}
});
</script>
See: http://docs.telerik.com/kendo-ui/api/javascript/ui/grid#events-sort

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