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Web API Service
Documentation
This example demonstrates the Diagram widget communicating with a Web API service. All data editing and processing operations are delegated to the server. The DevExtreme.AspNet.Data extension’s createStore method configures access to the server from the client. The server implementation is available under the DiagramEmployeesController.cs tab in the ASP.NET MVC version of this demo.
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<template>
<DxDiagram
id="diagram"
ref="diagram"
>
<DxNodes
:data-source="dataSource"
:key-expr="'ID'"
:text-expr="'Title'"
:parent-key-expr="'HeadID'"
>
<DxAutoLayout :type="'tree'"/>
</DxNodes>
<DxContextToolbox
:shape-icons-per-row="2"
:width="100"
:shapes="['rectangle']"
/>
<DxToolbox
:show-search="false"
:shape-icons-per-row="2"
>
<DxGroup
:title="'Items'"
:shapes="['rectangle']"
/>
</DxToolbox>
</DxDiagram>
</template>
<script>
import { DxDiagram, DxNodes, DxAutoLayout, DxToolbox, DxContextToolbox, DxGroup } from 'devextreme-vue/diagram';
import { createStore } from 'devextreme-aspnet-data-nojquery';
const url = 'https://js.devexpress.com/Demos/Mvc/api/DiagramEmployees';
const dataSource = createStore({
key: 'ID',
loadUrl: `${url}/Employees`,
insertUrl: `${url}/InsertEmployee`,
updateUrl: `${url}/UpdateEmployee`,
deleteUrl: `${url}/DeleteEmployee`,
onBeforeSend: function(method, ajaxOptions) {
ajaxOptions.xhrFields = { withCredentials: true };
},
onInserting: function(values) {
values['ID'] = 0;
values['Title'] = values['Title'] || 'New Position';
values['Prefix'] = 'Mr';
values['FullName'] = 'New Employee';
values['City'] = 'LA';
values['State'] = 'CA';
values['HireDate'] = new Date();
}
});
export default {
components: {
DxDiagram, DxNodes, DxAutoLayout, DxToolbox, DxContextToolbox, DxGroup
},
data() {
return {
dataSource: dataSource
};
}
};
</script>
<style scoped>
#diagram {
height: 725px;
}
</style>
import { createApp } from 'vue';
import App from './App.vue';
createApp(App).mount('#app');
<!DOCTYPE html>
<html>
<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" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/css/dx-diagram.css" />
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import('./index.js');
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app">
</div>
</div>
</body>
</html>
System.config({
transpiler: 'plugin-babel',
meta: {
'*.vue': {
loader: 'vue-loader'
},
'devextreme-aspnet-data-nojquery': {
'esModule': true
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
'vue': 'npm:vue@3.0.0/dist/vue.esm-browser.js',
'vue-loader': 'npm:dx-systemjs-vue-browser@1.0.15/index.js',
'devextreme-aspnet-data-nojquery': 'npm:devextreme-aspnet-data-nojquery@2.6.1/index.js',
'mitt': 'npm:mitt/dist/mitt.umd.js',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.4',
'devextreme-vue': 'npm:devextreme-vue@20.2.4',
'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.9.7/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.5/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.8/dist/dx-gantt.js',
'preact': 'npm:preact@10.5.7/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.7/hooks/dist/hooks.js',
'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js'
},
packages: {
'devextreme-vue': {
main: 'index.js'
},
'devextreme': {
defaultExtension: 'js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
babelOptions: {
sourceMaps: false,
stage0: true
}
});