数据更改时如何刷新ReactJS中的Material-Table(Material-ui)组件

Burak Ozdemir

我在ReactJS项目中使用了材料表,并且检查了它的文档,但是当数据不断变化时(例如每500ms左右),我不知道如何刷新表。我感谢任何信息。

以下代码是我要使用的数据表的代码。如下创建数据表后,我想定期从传入的UDP消息中更新行中元素的值。我将在500毫秒内通过UDP消息接收新值,并且我必须更新这些值。

import React from 'react';
import { forwardRef } from 'react';
import MaterialTable from 'material-table';

import AddBox from '@material-ui/icons/AddBox';
import ArrowDownward from '@material-ui/icons/ArrowDownward';
import Check from '@material-ui/icons/Check';
import ChevronLeft from '@material-ui/icons/ChevronLeft';
import ChevronRight from '@material-ui/icons/ChevronRight';
import Clear from '@material-ui/icons/Clear';
import DeleteOutline from '@material-ui/icons/DeleteOutline';
import Edit from '@material-ui/icons/Edit';
import FilterList from '@material-ui/icons/FilterList';
import FirstPage from '@material-ui/icons/FirstPage';
import LastPage from '@material-ui/icons/LastPage';
import Remove from '@material-ui/icons/Remove';
import SaveAlt from '@material-ui/icons/SaveAlt';
import Search from '@material-ui/icons/Search';
import ViewColumn from '@material-ui/icons/ViewColumn';

const tableIcons = {
    Add: forwardRef((props, ref) => <AddBox {...props} ref={ref} />),
    Check: forwardRef((props, ref) => <Check {...props} ref={ref} />),
    Clear: forwardRef((props, ref) => <Clear {...props} ref={ref} />),
    Delete: forwardRef((props, ref) => <DeleteOutline {...props} ref={ref} />),
    DetailPanel: forwardRef((props, ref) => <ChevronRight {...props} ref={ref} />),
    Edit: forwardRef((props, ref) => <Edit {...props} ref={ref} />),
    Export: forwardRef((props, ref) => <SaveAlt {...props} ref={ref} />),
    Filter: forwardRef((props, ref) => <FilterList {...props} ref={ref} />),
    FirstPage: forwardRef((props, ref) => <FirstPage {...props} ref={ref} />),
    LastPage: forwardRef((props, ref) => <LastPage {...props} ref={ref} />),
    NextPage: forwardRef((props, ref) => <ChevronRight {...props} ref={ref} />),
    PreviousPage: forwardRef((props, ref) => <ChevronLeft {...props} ref={ref} />),
    ResetSearch: forwardRef((props, ref) => <Clear {...props} ref={ref} />),
    Search: forwardRef((props, ref) => <Search {...props} ref={ref} />),
    SortArrow: forwardRef((props, ref) => <ArrowDownward {...props} ref={ref} />),
    ThirdStateCheck: forwardRef((props, ref) => <Remove {...props} ref={ref} />),
    ViewColumn: forwardRef((props, ref) => <ViewColumn {...props} ref={ref} />)
  };


export default function ElementsTable() {
  const [state, setState] = React.useState({
    columns: [
      { title: 'Element Name', field: 'elmName' },
      { title: 'Value', field: 'elmVal' },
      { title: 'Direction', field: 'msgDirection',
        lookup: { 1: 'INCOMING', 2: 'OUTGOING' }
      },
      {
        title: 'Value Type',
        field: 'valType',
        lookup: { 1: 'Engineering', 2: 'Raw' },
      },
    ],
    data: [
      { elmName: 'Elem1', elmVal: 'STATUS_ON', msgDirection: 1, valType: 1 },
      { elmName: 'Elem2', elmVal: 'STATUS_OFF', msgDirection: 2, valType: 2 },
      { elmName: 'Elem2', elmVal: 'STATUS_ON', msgDirection: 1, valType: 1 },
    ],
  });

  return (
    <MaterialTable
      title="Element List"
      icons={tableIcons}
      columns={state.columns}
      data={state.data}
      editable={{
        onRowAdd: newData =>
          new Promise(resolve => {
            setTimeout(() => {
              resolve();
              setState(prevState => {
                const data = [...prevState.data];
                data.push(newData);
                return { ...prevState, data };
              });
            }, 600);
          }),
        onRowUpdate: (newData, oldData) =>
          new Promise(resolve => {
            setTimeout(() => {
              resolve();
              if (oldData) {
                setState(prevState => {
                  const data = [...prevState.data];
                  data[data.indexOf(oldData)] = newData;
                  return { ...prevState, data };
                });
              }
            }, 600);
          }),
        onRowDelete: oldData =>
          new Promise(resolve => {
            setTimeout(() => {
              resolve();
              setState(prevState => {
                const data = [...prevState.data];
                data.splice(data.indexOf(oldData), 1);
                return { ...prevState, data };
              });
            }, 600);
          }),
      }}
    />
  );
}
多米诺987

您可以简单地使用useEffect中的时间间隔更新数据对象:

 useEffect(() => {
    const timer = setInterval(() => {
      setData(prevData => [
        {
          ...prevData[0],
          value: Math.round(Math.random() * 1000)
        }
      ]);
    }, 500);
    return () => clearInterval(timer);
}, []);

我创建了一个沙箱来向您展示它如何工作。您需要进行更新以适合您的数据。

本文收集自互联网,转载请注明来源。

如有侵权,请联系 [email protected] 删除。

编辑于
0

我来说两句

0 条评论
登录 后参与评论

相关文章