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       
(Showing Draft Content)

Excel IO要素

Excel IO要素を使用すると、Excelファイルのインポートおよびエクスポート機能を簡単に実現できます。

  1. Reactアプリを作成する

    コマンドプロンプトウィンドウを開き、次のコマンドを入力します。

    npm install -g create-react-app
    create-react-app quick-start
    cd quick-start
    npm start

    コマンドを実行すると、ディレクトリ内の指定の場所にReactプロジェクトが作成されます。Reactプロジェクトの詳しい作成方法については、https://ja.reactjs.org/docs/create-a-new-react-app.html を参照してください。


  2. Spread.Sheetsモジュールをインストールする

    Spread.Sheets Reactモジュール、および日本語リソースを、npmからインストールします。

    npm install @grapecity/spread-sheets
    npm install @grapecity/spread-sheets-react
    npm install @grapecity/spread-sheets-resources-ja


  3. スタイルをインポートする

    index.jsファイルで、スタイルファイルをインポートします。

    import '@grapecity/spread-sheets/styles/gc.spread.sheets.excel2013white.css';


  4. プロジェクトでExcel IO ReactモジュールとFileSaver Reactモジュールをインストールする

    次のコマンドを使用して、Excel I/Oおよびfile-saverモジュールをプロジェクトにインストールします。

    npm install @grapecity/spread-excelio
    npm install file-saver --save


  5. ReactアプリでExcel IOを使用する

    必要に応じてApp.jsファイルを変更します。 ブラウザウィンドウが更新されると、変更が反映されます。次のサンプルコードを使用します。

    次のサンプルコードは、ReactアプリケーションでExcel IO要素を使用する方法を示します。

    import React from 'react';
    import './App.css';
    import GC from '@grapecity/spread-sheets';
    import { SpreadSheets, Worksheet } from '@grapecity/spread-sheets-react';
    
    // ExcelIOモジュールをインポートします。
    import * as ExcelIO from "@grapecity/spread-excelio";
    
    // file-saverモジュールをインポートします。
    import saveAs from 'file-saver';
    var SpreadJSKey = "xxx";
    GC.Spread.Sheets.LicenseKey = SpreadJSKey;
    
    // 同じライセンスキーを使用して、Excel IOモジュールのライセンスを個別に取得する必要があります。
    ExcelIO.LicenseKey = SpreadJSKey;
    class App extends React.Component {
        constructor(props) {
            super(props);
            this.hostStyle =
                {
                    width: '1100px',
                    height: '800px'
                };
        }
    
    // ワークブックのinitializedイベントを処理します。
        workbookInit = (spread) => {
            this.setState({
                spread: spread
            });
        }
    // Excelをインポートします。
        importFile = () => {
            var excelFile = document.getElementById("fileDemo").files[0];
            // IOクラスのインスタンスを取得します。
            let excelIO = new ExcelIO.IO();
            excelIO.open(excelFile, (json) => {
                this.state.spread.fromJSON(json);
            }, (e) => {
                console.log(e);
            });
        }
    // Excelをエクスポートします。
        exportFile = () => {
            // IOクラスのインスタンスを取得します。
            let excelIO = new ExcelIO.IO();
            let fileName = document.getElementById("exportFileName").value;
            if (fileName.substr(-5, 5) !== '.xlsx') {
                fileName += '.xlsx';
            }
            var json = JSON.stringify(this.state.spread.toJSON());
            excelIO.save(json, (blob) => {
                saveAs(blob, fileName);
            }, (e) => {
                console.log(e);
            });
        }
        render() {
            return (
                <div>
                    <input type="file" name="files[]" id="fileDemo" accept=".xlsx" />
                    <input type="button" id="loadExcel" value="Import" onClick={this.importFile} />
                    <input type="button" id="saveExcel" value="Export" onClick={this.exportFile} />
                    <input type="text" id="exportFileName" placeholder="エクスポートするファイルの名前。" value="export.xlsx" />
                    <SpreadSheets backColor={this.spreadBackColor} hostStyle={this.hostStyle} workbookInitialized={this.workbookInit}>
                        <Worksheet>
                        </Worksheet>
                    </SpreadSheets>
                </div>
            )
        }
    }
    export default App;