import React from 'react';
import DataGrid, { Column, Editing } from 'devextreme-react/data-grid';
import { LoadPanel } from 'devextreme-react/load-panel';
import 'whatwg-fetch';
import reducer from './reducer.js';
import { saveChange, loadOrders, setChanges, setEditRowKey } from './actions.js';
const initialState = {
data: [],
changes: [],
editRowKey: null,
isLoading: false
};
const loadPanelPosition = { of: '#gridContainer' };
function App() {
const [state, dispatch] = React.useReducer(reducer, initialState);
const changesText = React.useMemo(() => {
return JSON.stringify(state.changes.map((change) => ({
type: change.type,
key: change.type !== 'insert' ? change.key : undefined,
data: change.data
})), null, ' ');
}, [state.changes]);
React.useEffect(() => {
loadOrders(dispatch);
}, []);
const onSaving = React.useCallback((e) => {
e.cancel = true;
e.promise = saveChange(dispatch, e.changes[0]);
}, []);
const onChangesChange = React.useCallback((changes) => {
setChanges(dispatch, changes);
}, []);
const onEditRowKeyChange = React.useCallback((editRowKey) => {
setEditRowKey(dispatch, editRowKey);
}, []);
return (
<React.Fragment>
<LoadPanel
position={loadPanelPosition}
visible={state.isLoading}
/>
<DataGrid
id="gridContainer"
keyExpr="OrderID"
dataSource={state.data}
showBorders
repaintChangesOnly
onSaving={onSaving}>
<Editing
mode="row"
allowAdding
allowDeleting
allowUpdating
changes={state.changes}
onChangesChange={onChangesChange}
editRowKey={state.editRowKey}
onEditRowKeyChange={onEditRowKeyChange}
/>
<Column dataField="OrderID" allowEditing={false}></Column>
<Column dataField="ShipName"></Column>
<Column dataField="ShipCountry"></Column>
<Column dataField="ShipCity"></Column>
<Column dataField="ShipAddress"></Column>
<Column dataField="OrderDate" dataType="date"></Column>
<Column dataField="Freight"></Column>
</DataGrid>
<div className="options">
<div className="caption">Options</div>
<div className="option">
<span>Edit Row Key:</span>
<div id="editRowKey">{state.editRowKey === null ? 'null' : state.editRowKey.toString()}</div>
</div>
<div className="option">
<span>Changes:</span>
<div id="changes">{changesText}</div>
</div>
</div>
</React.Fragment>
);
}
export default App;
import { sendRequest } from './utils.js';
const URL = 'https://js.devexpress.com/Demos/Mvc/api/DataGridWebApi';
export const FETCH_PENDING = 'FETCH_PENDING';
export const FETCH_SUCCESS = 'FETCH_SUCCESS';
export const FETCH_ERROR = 'FETCH_ERROR';
export const SAVING_PENDING = 'SAVING_PENDING';
export const SAVING_SUCCESS = 'SAVING_SUCCESS';
export const SAVING_ERROR = 'SAVING_ERROR';
export const SAVING_CANCEL = 'SAVING_CANCEL';
export const SET_CHANGES = 'SET_CHANGES';
export const SET_EDIT_ROW_KEY = 'SET_EDIT_ROW_KEY';
export async function loadOrders(dispatch) {
dispatch({ type: FETCH_PENDING });
try {
const { data } = await sendRequest(`${URL}/Orders?skip=700`);
dispatch({
type: FETCH_SUCCESS,
payload: {
data: data
}
});
} catch(err) {
dispatch({ type: FETCH_ERROR });
throw err;
}
}
export async function saveChange(dispatch, change) {
if (change && change.type) {
let data;
dispatch({ type: SAVING_PENDING });
try {
data = await sendChange(URL, change);
change.data = data;
dispatch({
type: SAVING_SUCCESS,
payload: {
change: change
}
});
return data;
} catch(err) {
dispatch({ type: SAVING_ERROR });
throw err;
}
} else {
dispatch({ type: SAVING_CANCEL });
}
}
async function sendChange(url, change) {
switch (change.type) {
case 'insert':
return sendRequest(`${url}/InsertOrder`, 'POST', {
values: JSON.stringify(change.data)
});
case 'update':
return sendRequest(`${url}/UpdateOrder`, 'PUT', {
key: change.key,
values: JSON.stringify(change.data)
});
case 'remove':
return sendRequest(`${url}/DeleteOrder`, 'DELETE', { key: change.key });
default:
break;
}
}
export function setChanges(dispatch, changes) {
dispatch({
type: SET_CHANGES,
payload: changes
});
}
export function setEditRowKey(dispatch, editRowKey) {
dispatch({
type: SET_EDIT_ROW_KEY,
payload: editRowKey
});
}
import applyChanges from 'devextreme/data/apply_changes';
import {
FETCH_PENDING,
FETCH_SUCCESS,
FETCH_ERROR,
SAVING_PENDING,
SAVING_SUCCESS,
SAVING_ERROR,
SAVING_CANCEL,
SET_CHANGES,
SET_EDIT_ROW_KEY } from './actions.js';
export default function reducer(state, { type, payload }) {
let newData;
switch (type) {
case SAVING_SUCCESS:
newData = applyChanges(state.data, [payload.change], { keyExpr: 'OrderID' });
return {
...state,
data: newData,
changes: [],
editRowKey: null,
isLoading: false
};
case SAVING_CANCEL:
return {
...state,
changes: [],
editRowKey: null
};
case SET_CHANGES:
return {
...state,
changes: payload
};
case SET_EDIT_ROW_KEY:
return {
...state,
editRowKey: payload
};
case FETCH_SUCCESS:
return {
...state,
...payload,
isLoading: false
};
case FETCH_PENDING:
case SAVING_PENDING:
return {
...state,
isLoading: true
};
case FETCH_ERROR:
case SAVING_ERROR:
return {
...state,
isLoading: false
};
default:
return state;
}
}
export async function sendRequest(url, method = 'GET', data) {
data = data || {};
const params = Object.keys(data)
.map((key) => {
return `${encodeURIComponent(key)}=${encodeURIComponent(data[key])}`;
})
.join('&');
const result = await fetch(url, {
method: method,
body: params || null,
headers:
method === 'GET'
? {}
: {
'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8'
},
credentials: 'include'
});
if (result.ok) {
const text = await result.text();
return text && JSON.parse(text);
} else {
const json = await result.json();
throw json.Message;
}
}
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(
<App />,
document.getElementById('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/20.2.5/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.5/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.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>
#gridContainer {
height: 440px;
}
.options {
padding: 20px;
margin-top: 20px;
background-color: rgba(191, 191, 191, 0.15);
}
.caption {
margin-bottom: 10px;
font-weight: 500;
font-size: 18px;
}
.option {
margin-bottom: 10px;
}
.option > span {
position: relative;
margin-right: 14px;
}
.option > div {
display: inline-block;
font-weight: bold;
}
System.config({
transpiler: 'plugin-babel',
meta: {
'devextreme/localization.js': {
"esModule": true
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@16.14.0/umd/react.development.js',
'react-dom': 'npm:react-dom@16.14.0/umd/react-dom.development.js',
'prop-types': 'npm:prop-types@15.7.2/prop-types.js',
'whatwg-fetch': 'npm:whatwg-fetch@2.0.4/fetch.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@20.2.5',
'devextreme-react': 'npm:devextreme-react@20.2.5',
'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.9.8/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.11/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.18/dist/dx-gantt.js',
'preact': 'npm:preact@10.5.11/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.11/hooks/dist/hooks.js',
// SystemJS plugins
'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': {
defaultExtension: 'js'
},
'devextreme-react': {
main: 'index.js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
});