ReactJS / React-Data-Grid渲染列更改

时间:2018-09-25 13:17:14

标签: javascript reactjs react-data-grid

对于ReactJS和编码我还是很陌生,我正在尝试使用“ react-data-grid”渲染一个React数据网格。现在,该网格由两个数组组成,一个行数组和一个列数组。现在,我已经创建了用于推送和弹出数组以添加或删除列和行的函数。

问题是,它实际上以行而不是列的形式呈现更改。我问了我一个比较有经验的同事,但是他帮不了我。但是,我们记录了控制台,“幕后”的一切工作正常,只是无法渲染:

我已将代码分为表部分和呈现部分:

 Import React from "react";
    import ReactDOM from "react-dom";
    import {Table} from "./react_table"
    import {columnsArray} from "./react_table";
    import {rowsArray} from "./react_table";


    let columnsId = 1;

    function columnsCreator (columnsCount) {

        columnsArray.push({key: `id${columnsCount}`, name: `Title${columnsCount}`});
        columnsId++;

        if (typeof rowsArray !== "undefined" && rowsArray.length === 0) {

            rowsArray.push({});
        }
    }

    function rowsCreator () {

        rowsArray.push({});
    }

    function columnsEraser () {

        columnsArray.pop();
        columnsId--;
    }

    function rowsEraser () {

        rowsArray.pop();
    }

    for (let i = 1; i <= 10; i++) {

        columnsCreator(columnsId);
    }

    for (let i = 1; i <= 10; i++) {

        rowsCreator();
    }

    for (let i = 1; i <= 5; i++) {

        columnsEraser();
    }

    for (let i = 1; i <= 5; i++) {

        rowsEraser();
    }


    class SiteRenderer extends React.Component {

        constructor(props) {

            super(props);
            this.state = {

                columnsNumber: columnsArray.length,
                rowsNumber: rowsArray.length
            };

            this.increaseColumnsNumber = this.increaseColumnsNumber.bind(this);
            this.increaseRowsNumber = this.increaseRowsNumber.bind(this);
            this.decreaseColumnsNumber = this.decreaseColumnsNumber.bind(this);
            this.decreaseRowsNumber = this.decreaseRowsNumber.bind(this);

        }

        increaseColumnsNumber() {

            columnsArray.push({key: `id${columnsId}`, name: `Title${columnsId}`});
            columnsId++;


            if (typeof rowsArray !== "undefined" && rowsArray.length === 0) {

                rowsArray.push({});
            }
            this.setState ({

                columnsNumber: columnsArray.length + 1
            })
        }

        increaseRowsNumber() {

            rowsArray.push({});
            this.setState ({

                rowsNumber: rowsArray.length + 1
            })
        }

        decreaseColumnsNumber() {

            columnsArray.pop();
            columnsId--;
            this.setState ({

                columnsNumber: columnsArray.length - 1
            })
        }

        decreaseRowsNumber() {

            rowsArray.pop();
            this.setState ({

                rowsNumber: rowsArray.length - 1
            })
        }

        render() {

            return(

                <div>
                    <h1>React-Table</h1>
                    <h2>Length of Column Array: {columnsArray.length}</h2>
                    <h2>Length of Row Array: {rowsArray.length}</h2>
                    <Table columnsNumber={this.state.columnsNumber} rowsNumber={this.state.rowsNumber}/>
                    <button type="button" id="btnCreateColumn" className="tableButtons" onClick={this.increaseColumnsNumber}>Add Column</button>
                    <button type="button" id="btnCreateRow" className="tableButtons" onClick={this.increaseRowsNumber}>Add Row</button>
                    <button type="button" id="btnEraseColumn" className="tableButtons" onClick={this.decreaseColumnsNumber}>Remove Column</button>
                    <button type="button" id="btnEraseRow" className="tableButtons" onClick={this.decreaseRowsNumber}>Remove Row</button>
                </div>
            )

        }
    }

ReactDOM.render(<SiteRenderer/>, document.body.appendChild(document.createElement("div")));

然后是表文件

import React from "react";
import ReactDataGrid from "react-data-grid";


export const columnsArray = [];
export const rowsArray = [];
const columnGetter = columnsNumber => columnsArray[columnsNumber];
const rowGetter = rowsNumber => rowsArray[rowsNumber];

export class Table extends React.Component {

    constructor(props) {

        super(props);
    }

    render() {


        return (

            <div>
                <ReactDataGrid
                    columns={columnsArray}
                    rowGetter={rowGetter}
                    columnGetter={columnGetter}
                    rowsCount={rowsArray.length}
                    enableCellSelect={true}
                    rowHeight={50}
                    minHeight={50*rowsArray.length + 55}
                    resizable={true}
                />
            </div>

        )
    }
}

首先,我知道代码到目前为止还不是很完美,我在尝试时进行了很多更改,而且一团糟,很抱歉,发现问题后,我打算对其进行优化。

我还知道创建或删除列和行的每个功能都是双重的,SiteRenderer-Component外部的方法仅是测试方法,现在我使用它在页面加载时创建一个起始表(也适用于列,但不适用于以后的更改,与始终有效的行相反)。

如果我错过了什么,对不起,随时问,这是我在这里的第一个问题。

0 个答案:

没有答案