Multiple Selection
If the widget embedded into the DropDownBox allows multiple selection, synchronize the DropDownBox value with the selected items. Synchronization instructions are the same for every selection mode.
In this demo, the DataGrid's selection.mode and TreeView's selectionMode options are used to enable multiple selection.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
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var DemoApp = angular.module('DemoApp', ['dx']);
DemoApp.controller('DemoController', function DemoController($scope) {
var treeView;
var syncTreeViewSelection = function(treeView){
if (!treeView) return;
if (!$scope.treeBoxValue) {
treeView.unselectAll();
return;
}
$scope.treeBoxValue.forEach(function(key){
treeView.selectItem(key);
});
};
var makeAsyncDataSource = function(jsonFile){
return new DevExpress.data.CustomStore({
loadMode: "raw",
key: "ID",
load: function() {
return $.getJSON("../../../../data/" + jsonFile);
}
});
};
var treeDataSource = makeAsyncDataSource("treeProducts.json"),
gridDataSource = makeAsyncDataSource("customers.json");
$scope.treeBoxValue = ["1_1"];
$scope.treeBoxOptions = {
bindingOptions: {
value: 'treeBoxValue'
},
valueExpr: "ID",
displayExpr: "name",
placeholder: "Select a value...",
showClearButton: true,
dataSource: treeDataSource,
onValueChanged: function(){
syncTreeViewSelection(treeView);
},
treeView: {
dataSource: treeDataSource,
dataStructure: "plain",
keyExpr: "ID",
parentIdExpr: "categoryId",
displayExpr: "name",
selectByClick: true,
selectNodesRecursive: false,
showCheckBoxesMode: "normal",
bindingOptions: {
selectionMode: "selectionMode"
},
onContentReady: function(e) {
treeView = e.component;
syncTreeViewSelection(treeView);
},
onItemSelectionChanged: function(args){
$scope.treeBoxValue = args.component.getSelectedNodeKeys();
}
}
};
$scope.gridBoxValue = [3];
$scope.gridBoxOptions = {
bindingOptions: {
value: "gridBoxValue"
},
valueExpr: "ID",
placeholder: "Select a value...",
displayExpr: "CompanyName",
onValueChanged: function(e){
$scope.gridBoxValue = e.value || [];
},
showClearButton: true,
dataSource: gridDataSource,
dataGrid: {
dataSource: gridDataSource,
columns: ["CompanyName", "City", "Phone"],
hoverStateEnabled: true,
paging: { enabled: true, pageSize: 10 },
filterRow: { visible: true },
scrolling: { mode: "infinite" },
height: 345,
selection: { mode: "multiple" },
bindingOptions: {
"selectedRowKeys": "gridBoxValue"
},
onSelectionChanged: function(selectedItems){
$scope.gridBoxValue = selectedItems.selectedRowKeys;
}
}
};
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script>
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.6/css/dx.common.css"/>
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.6/css/dx.light.css"/>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.16/angular.min.js"></script>
<script>window.angular || document.write(decodeURIComponent('%3Cscript src="js/angular.min.js"%3E%3C\/script%3E'))</script>
<script src="https://cdn3.devexpress.com/jslib/20.1.6/js/dx.all.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css"/>
<script src="index.js"></script>
</head>
<body class="dx-viewport">
<div class="demo-container" ng-app="DemoApp" ng-controller="DemoController">
<div id="form">
<div class="dx-fieldset">
<div class="dx-field">
<div class="dx-field-label">DropDownBox with embedded TreeView</div>
<div class="dx-field-value">
<div dx-drop-down-box="treeBoxOptions">
<div data-options="dxTemplate: { name: 'content' }">
<div dx-tree-view="treeBoxOptions.treeView"></div>
</div>
</div>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">DropDownBox with embedded DataGrid</div>
<div class="dx-field-value">
<div dx-drop-down-box="gridBoxOptions">
<div data-options="dxTemplate: { name: 'content' }">
<div dx-data-grid="gridBoxOptions.dataGrid"></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
#form .dx-fieldset {
height: 500px;
}