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在已有内容上追加导入

问题：导入Excel文件后我希望在原有的sheet后再追加sheet怎么做

背景：

通过SpreadJS创建模板后，如果再导入新的excel文件，会发现导入的Excel文件会将原有的模板“覆盖了”。

需求希望导入的Excel文件不直接覆盖原先的模板，而是在模板的后面进行追加Sheet。

解决方案：

先解释下出现这个问题的原因，不管是Excel文件也好，SpreadJS创建的模板也好，本质上就是一个工作簿。导入新的工作簿之后，就会将原有的工作簿进行替换，这是设计使然，也是与Excel保持一致的。

既然导入新的工作簿后会将原有的SpreadJS进行替换，那么可以在导入Excel文件后，新建一个临时Spread（不直接使用原Spread），用于获取导入excel文件的Sheet Json信息，之后在原先SpreadJS基础上进行拼接Sheet。

var newSpread = new GC.Spread.Sheets.Workbook(document.getElementById('ss'));
newSpread.fromJSON(workbookObj);
                    
var i = 0;
// 将 newSpread 的命名样式合并在spread上
newSpread.getNamedStyles().forEach(function (namedStyle) {
    namedStyle.name = "sc" + i + "_" + namedStyle.name;
    spread.addNamedStyle(namedStyle);
});

// 将 newSpread 的sheet拼接在spread sheet后
var sheetCount = newSpread.getSheetCount();
for(let j=0; j<sheetCount; j++){
    let sheet = newSpread.getSheet(j);
    let sheetJSON = JSON.stringify(sheet.toJSON());

    sheetJSON = sheetJSON.replace(/"style":"/g, '"style":"sc' + i + "_");
    spread.suspendPaint();
    var newSheet = new GC.Spread.Sheets.Worksheet("sheet" + i + "_");
    newSheet.fromJSON(JSON.parse(sheetJSON));
    newSheet.name(newSheet.name()+i+"_"+j);
    spread.addSheet(spread.getSheetCount(), newSheet);
    spread.resumePaint();
}

作者: Grapecity.China | 审核：Clark.Pan | 更新时间：2023.09.27