在reactJs中带有标题的动态表

问题描述

我试图基于带有标题的输入（行数和列数）创建动态表，并将其值存储在字典变量列表中，其中键将是标题数据，而值将是行数据。

问题： 我无法将我的动态2D数组（tableArrayData）转换为表数据的字典列表（tableDictData）。 我试图为一行创建一个字典对象，但是每次我在行中输入内容时都会得到多个对象。

我知道问题在74至85之间，只是不确定在这里可以做什么。 沙盒链接：https://codesandbox.io/s/issue-with-header-6xod9?file=/src/demo.js

import React,{ Fragment,useState,useRef,useEffect } from "react";
// Material-ui imports
import { fade,withStyles } from "@material-ui/core/styles";
import { makeStyles } from "@material-ui/core/styles";
import Table from "@material-ui/core/Table";
import TableBody from "@material-ui/core/TableBody";
import TableCell from "@material-ui/core/TableCell";
import TableContainer from "@material-ui/core/TableContainer";
import TableRow from "@material-ui/core/TableRow";
import Paper from "@material-ui/core/Paper";
import InputBase from "@material-ui/core/InputBase";
import TextField from "@material-ui/core/TextField";
const useStyles = makeStyles({
  table: {
    minWidth: 650
  }
});
const BootstrapInput = withStyles((theme) => ({
  root: {
    "label + &": {
      marginTop: theme.spacing(3)
    }
  },input: {
    borderRadius: 4,position: "relative",backgroundColor: theme.palette.common.white,border: "1px solid #ced4da",fontSize: 16,width: "60%",padding: "5px 6px",transition: theme.transitions.create(["border-color","Box-shadow"]),"&:focus": {
      BoxShadow: `${fade(theme.palette.primary.main,0.25)} 0 0 0 0.2rem`,borderColor: theme.palette.primary.main
    }
  }
}))(InputBase);

export default function DataTabelVariable(props) {
  // Table
  const classes = useStyles();
  const [rowValue,setRowValue] = useState(0);
  const [columnsValue,setColumnsValue] = useState(0);
  const [tableCellsData,setTableCellsData] = useState();
  const [tableArrayData] = useState([[]]);
  const [tableDictData] = useState([]);
  // const header_row = [];
  const ref = useRef(null);

  const getUniqueKeyFromArrayIndex = (rowNum,columnNum) => {
    return `${rowNum}-${columnNum}`;
  };

  
  const onChangeHandler = (e) => {
    setTableCellsData({
      ...tableCellsData,[e.target.name]: e.target.value
    });
    let [row,col] = e.target.name.split("-");
    row = parseInt(row,10);
    col = parseInt(col,10);

    if (!tableArrayData[row]) {
      tableArrayData[row] = [];
      tableArrayData[row].push([]);
      // tableDictData[row].push({});
    }
    tableArrayData[row][col] = e.target.value;
 

    let header = tableArrayData[0];
    // go through cells
    for (var i = 1; i < tableArrayData.length; i++) {
      var tableRow = tableArrayData[i];
      var rowData = {};
  
      for (var j = 0; j < tableRow.length; j++) {
        rowData[header[j]] =tableRow[j];
      }
  
      tableDictData.push(rowData);
    }

    // if (!tableArrayData[row]) {
    //   tableArrayData[row] = [];
    //   tableArrayData[row].push([]);
    // }
    // tableArrayData[row][col] = e.target.value;
    // props.value(tableArrayData)
  };


  useEffect(() => {
    // console.log(tableArrayData.length);
    // console.log(tableArrayData[0]);
    console.log(tableDictData)
    console.log(tableArrayData);
  },[tableCellsData]);

  const generateTable = () => {
    let table = [];
    // Outer loop to create parent
    let rowVariable = 1;
    rowVariable = rowValue + rowVariable;
    // console.log(rowVariable)
    for (let i = 0; i < rowVariable; i++) {
      let children = [];
      //Inner loop to create children
      for (let j = 0; j < columnsValue; j++) {
        children.push(
          <td>
            {rowVariable === 1 ? (
              <BootstrapInput
                placeholder="header_value"
                name={getUniqueKeyFromArrayIndex(i,j)}
                onChange={onChangeHandler}
              />
            ) : (
              <BootstrapInput
                placeholder="row_value"
                name={getUniqueKeyFromArrayIndex(i,j)}
                onChange={onChangeHandler}
              />
            )}
          </td>
        );
      }
      table.push(
        <TableRow key={i}>
          <TableCell>{children}</TableCell>
        </TableRow>
      );
    }
    return table;
  };

  return (
    <Fragment>
      <div>
        <h5>Select Row number and Columns number</h5>
        <div className={"rowColumnsNumber"} style={{ marginTop: 20 }}>
          <TextField
            id="Row-number"
            label="Row(s)"
            type="number"
            InputLabelProps={{ shrink: true }}
            inputProps={{ min: "0",max: "1000",step: "1" }}
            onChange={(e) => setRowValue(parseInt(e.target.value,10))}
            variant="outlined"
          />
          <TextField
            id="Columns-number"
            label="Columns(s)"
            type="number"
            inputProps={{ min: "0",step: "1" }}
            InputLabelProps={{ shrink: true }}
            onChange={(e) => setColumnsValue(parseInt(e.target.value,10))}
            variant="outlined"
          />
        </div>
        <br />
        <div className={"TableContainer"}>
          <TableContainer component={Paper}>
            <Table className={classes.table} aria-label="simple table">
              <TableBody ref={ref}>{generateTable()}</TableBody>
              {/* <TableBody> {generateTable()}</TableBody> */}
            </Table>
          </TableContainer>
        </div>
      </div>
    </Fragment>
  );
}

解决方法

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