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某一列数据自增

需求：如何实现表格某列数据自增

背景：

在客户使用表格(Table)实现常见的增删改查操作时,有一列需要用来展示当前记录的序号,但序号可能不等于记录的ID,如果让客户再额外去维护一个字段必然会造成存储上的浪费。

实现方式：

针对这一需求,我们可以想象一下,如果换成excel上的UI操作,肯定是直接按序列拖拽填充更加简单.那搬到代码中也是一样的.其实很多需求,我们如果实在无从下手,都可以想象我们自己要做这件事情时,常用的步骤是什么,将这些步骤转变成代码即可。

表格在做增删操作的时候,我们需要去监听行的变化,然后执行自动填充就可实现我们的需求,核心代码如下:

// 监听表格行变化
sheet.bind(GC.Spread.Sheets.Events.TableRowsChanged, function (e, data) {
  fillTableCol(table);
});

function fillTableCol(table) {
  let { row, col, rowCount, colCount } = table.dataRange();
  sheet.setValue(row, col, 1);
  sheet.fillAuto(new GC.Spread.Sheets.Range(row, col, rowCount, 1), {
    fillType: GC.Spread.Sheets.Fill.FillType.linear,
    series: GC.Spread.Sheets.Fill.FillSeries.column,
    direction: GC.Spread.Sheets.Fill.FillDirection.down,
  });
}

详细代码请参考附件Demo：table某列数据自增.zip

作者: Winny.Zhang | 审核：Lynn.Dou | 更新时间：2023.11.17