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       
(Showing Draft Content)

百万单元格性能优化

问题:使用SpreadJS完成100万个单元格性能优化


背景:

在SpreadJS使用过程中,经常会通过setArry方式写入数据

sheet.setArray(2, 1, dataArray1, false);
sheet.setArray(0, dataArray1[0].length + 1, dataArray2, false);
sheet.setArray(3, dataArray1[0].length + 1, dataArray3, false);

然后通过getRange(),后对区域通过backColor(),foreColor(),formatter(),hAlign(),vAlign()方法对区域进行样式设计。

sheet.getRange(0, 0, rowCount, columnCount, GC.Spread.Sheets.SheetArea.viewport).backColor("#fff");
sheet.getRange(2, 1, 1, columnCount, GC.Spread.Sheets.SheetArea.viewport).foreColor('#000');
sheet.getRange(0, 0, rowCount, columnCount, GC.Spread.Sheets.SheetArea.viewport).hAlign(GC.Spread.Sheets.HorizontalAlign.center);
sheet.getRange(0, 0, rowCount, columnCount, GC.Spread.Sheets.SheetArea.viewport).vAlign(GC.Spread.Sheets.VerticalAlign.center);
sheet.getRange(1, column1 + 1, 2, columnSplit, GC.Spread.Sheets.SheetArea.viewport).backColor("#C9DEF4");
sheet.getRange(3, column1 + 1, row1, columnSplit, GC.Spread.Sheets.SheetArea.viewport).backColor("#DFDFDF");
sheet.getRange(1, columnSplit + column1 + 1, 2, columnCount, GC.Spread.Sheets.SheetArea.viewport).backColor("#CDFFCD");

设置颜色。

editArr.forEach((item) => {
  sheet
    .getRange(
      item,
      columnSplit + column1 + 1,
      1,
      columnCount,
      GC.Spread.Sheets.SheetArea.viewport
    )
    .backColor("#FCE6C7");
});
sheet
  .getRange(
    3,
    column1 + 1,
    row1,
    columnCount,
    GC.Spread.Sheets.SheetArea.viewport
  )
  .backColor("#DFDFDF");
sheet
  .getRange(0, 0, 3, columnCount, GC.Spread.Sheets.SheetArea.viewport)
  .font("bold 13px arial");
sheet
  .getRange(3, 0, rowCount, columnCount, GC.Spread.Sheets.SheetArea.viewport)
  .font("13px arial");
sheet
  .getRange(0, 0, 13, columnCount, GC.Spread.Sheets.SheetArea.viewport)
  .setBorder(
    new GC.Spread.Sheets.LineBorder("#D7D7D7", GC.Spread.Sheets.LineStyle.thin),
    { all: true }
  );

由于整个sheet,10000多行,100多列,使用getRange()对进行样式和字体设置,相当于遍历设置样式,整个页面加载时间较长:

优化方案:

1、将字体水平居中,垂直居中通过setDefaultStyle()设置:

let sytleAlignment = new GC.Spread.Sheets.Style();
sytleAlignment .hAlign = GC.Spread.Sheets.HorizontalAlign.center;
sytleAlignment .vAlign = GC.Spread.Sheets.VerticalAlign.center;
sytleAlignment .backColor = "#fff";
sheet.setDefaultStyle(sytleAlignment);

2、将较大区域通过setStyle(),设置在列上,如下图的3,和4区域,行数都超过了10000行,然后将小区域部分通过getRange()方式设置样式和字体。

部分代码如下:

let styleBackColor = new GC.Spread.Sheets.Style();
styleBackColor.backColor = "#DFDFDF";
styleBackColor.hAlign = GC.Spread.Sheets.HorizontalAlign.center;
styleBackColor.vAlign = GC.Spread.Sheets.VerticalAlign.center;
for (let i = column1 + 1; i < columnCount; i++) {
  sheet.setStyle(-1, i, styleBackColor);
}
sheet
  .getRange(0, column1 + 1, 1, columnCount, GC.Spread.Sheets.SheetArea.viewport)
  .backColor("#fff");

总结

1、在进行样式设置时,如果所有单元格都适用,优先使用setDefaultStyle()设置

2、对大片区域进行样式设置时,优先使用setStyle()将样式设置在列上

3、先对大片区域进行样式设置,再对小部分区域进行样式设置,覆盖样式(注意样式的优先级)

具体代码请参考该链接

作者: GrapeCity China | 审核:Lynn.Dou | 更新时间:2023.12.10