Selection & Export
The Grid widget allows users to select specific cells and then to export them to Excel or a Telerik UI Chart for ASP.NET Core .
For runnable example, refer to the Demo on copying/exporting selected cells
Getting Started
The following sections provide step-by-step instructions and examples on getting started with the Grid Selection Export functionality.
The selection export functionality relies on the client-side Grid API. In this example, a Telerik UI ContextMenu is used to execute Grid methods related to copying and exporting of the selected cells.
Enabling Excel Export
-
Configure the Selectable property and apply the following settings:
- Set the Selection Mode to Multiple.
- Set the Selection Type to Cell.
-
To take full advantage of the Excel export feature, download the JSZip library and include the file before the Kendo UI JavaScript files in the
Layout.cshtml
. For more information, refer to the article with the requirements.<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script> <script src="https://unpkg.com/jszip/dist/jszip.min.js"></script> <script src="https://kendo.cdn.telerik.com/2024.4.1112/js/kendo.all.min.js"></script> @(Html.Kendo().Grid<OrderViewModel>() .Name("grid") .Selectable(selectable => selectable .Mode(GridSelectionMode.Multiple) .Type(GridSelectionType.Cell)) .DataSource(dataSource => dataSource .Ajax() .Read(read => read.Action("Orders_Read", "Grid")) ) )
<kendo-grid name="grid"> <selectable mode="multiple,cell" /> <datasource type="DataSourceTagHelperType.Ajax"> <transport> <read url="@Url.Action("Orders_Read","Grid")" /> </transport> </datasource> </kendo-grid>
Initializing a ContextMenu
-
Add an icon for the ContextMenu.
<span class='k-primary k-bg-primary k-icon k-i-menu contextMenuIcon'></span>
-
Create the widget.
@(Html.Kendo().ContextMenu() .Name("contextmenu") .Target(".contextMenuIcon") .ShowOn("click") .AlignToAnchor(true) .Items(items => { items.Add().Text("Copy").HtmlAttributes(new { id = "copy" }); items.Add().Text("Copy with Headers").HtmlAttributes(new { id = "copyWithHeaders" }); items.Add().Separator(true); items.Add().Text("Export").HtmlAttributes(new { id = "export" }); items.Add().Text("Export with Headers").HtmlAttributes(new { id = "exportWithHeaders" }); items.Add().Text("Export to Chart").HtmlAttributes(new { id = "exportToChart" }); }) .Events(ev => ev.Select("onSelect")) )
<kendo-contextmenu name="contextmenu" target=".contextMenuIcon" show-on="click" align-to-anchor="true" on-select="onSelect"> <popup-animation> <open effects="fade:in" duration="500" /> </popup-animation> <items> <menu-item text="Copy" image-html-attributes='new Dictionary<string,object> { ["id"] = "copy" }'> </menu-item> <menu-item text="Copy with Headers" image-html-attributes='new Dictionary<string,object> { ["id"] = "copyWithHeaders" }'></menu-item> <menu-item separator="true"></menu-item> <menu-item text="Export" image-html-attributes='new Dictionary<string,object> { ["id"] = "export" }'> </menu-item> <menu-item text="Export with Headers" image-html-attributes='new Dictionary<string,object> { ["id"] = "exportWithHeaders" }'> </menu-item> <menu-item text="Export to Chart" image-html-attributes='new Dictionary<string,object> { ["id"] = "exportToChart" }'> </menu-item> </items> </kendo-contextmenu>
-
Define the event handling function.
function onSelect(e) { var item = e.item.id; switch (item) { case "copy": copySelected(); break; case "copyWithHeaders": copySelectedWithHeaders(); break; case "export": exportSelected(); break; case "exportWithHeaders": exportSelectedWithHeaders(); break; case "exportToChart": exportToChart(); break; default: break; }; }
Copying Selected Data
To enable users to copy the selected data, call the copySelectionToClipboard
method.
function copySelected() {
let selected = grid.select();
if (selected.length === 0) {
kendo.alert("Please select cells before copying.");
return;
}
grid.copySelectionToClipboard(false);
}
function copySelectedWithHeaders() {
let selected = grid.select();
if (selected.length === 0) {
kendo.alert("Please select cells before copying.");
return;
}
grid.copySelectionToClipboard(true);
}
Exporting Selected Data to Excel
To enable users to export the selected data, call the exportSelectedToExcel
method.
function exportSelected() {
let selected = grid.select();
if (selected.length === 0) {
kendo.alert("Please select cells before exporting.");
return;
}
grid.exportSelectedToExcel(false);
}
function exportSelectedWithHeaders() {
let selected = grid.select();
if (selected.length === 0) {
kendo.alert("Please select cells before exporting.");
return;
}
grid.exportSelectedToExcel(true);
}
Exporting Selected Data to Chart
To enable users to export the selected data to a Kendo UI Chart, call the getSelectedData
method and initialize a Chart widget with the data.
-
Add an empty div before initializing the Grid.
<div id="chart-container"></div>
-
Define the
exportToChart
method as demonstrated below.function exportToChart() { var container = $('#chart-container'); var windowInstance = $('#chart-container').data('kendoWindow'); var currInstance = container.find('.k-chart').data('kendoChart'); /* Get the selected data. */ var data = grid.getSelectedData(); if (!data.length) { kendo.alert('Please select cells before exporting.'); return; } /* If the user selects only a value(Freight) without a category(ShipCountry), set the ShipCountry name to Uknown.*/ let unknownCountries = $.extend(true, [], data); unknownCountries.forEach(function (item, index, array) { if (!array[index].ShipCountry) { array[index].ShipCountry = "Unknown" } }); /* Destroy the window instance. */ if (windowInstance) { windowInstance.destroy(); } /* Destroy the chart instance. */ if (currInstance) { currInstance.destroy(); } /* Initialize a new window instance and increase it's width for every row that has been selected. This way the chart can fit properly. */ let windowWidth = data.length > 5 ? data.length * 75 : 500; windowInstance = container.kendoWindow({ width: windowWidth }).data('kendoWindow'); container.empty(); /* Create a chart using the data and append it to the window. */ var element = $('<div></div>').appendTo(container); windowInstance.open().center(); element.kendoChart({ dataSource: { data: unknownCountries }, series: [{ type: "column", field: 'Freight' }], categoryAxis: {field: "ShipCountry"} }); }
Selection Types
The following selection types are supported:
- Cell selection - the user holds down the
CTRL
key (Command
key on Mac) and uses theleft-click
of the mouse to select cells. - Range selection - the user holds down the
left-click
on the mouse and drags across a range of cells. - Range and Cell selection - the user can combine the two approaches from above and select both a range and separate cells.
- Range combination selection - the user performs a range selection and while holding the
CTRL
key (Command
key on Mac), they perform another range selection.
Known Limitations
- The
copySelectionToClipboard
,exportSelectedToExcel
andgetSelectedData
methods do not work with rows that are persisted across different pages. - The Export to Chart method does not work with
Range and Cell selection
type.