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       
(Showing Draft Content)

表格绑定因行数报错

问题:进行表格的数据绑定,出现报错


从 v13.1.0 版本开始,SpreadJS 增强了表格的功能,新增表格行不需要在 sheet 上整行进行插入。

在这种模式下,表格下方有合并单元格或其他表格或者sheet行数不够时,表格内新增行时就会报错。

如下图所示的情形就是典型的情形之一,表格下方有合并单元格,表格内新增行时会引起,合并单元格被拆分,表单报错。

image

如图所示,用户在设计器中设计了如下图所示的表单:

image

在V13.1.0以前的版本,绑定数据源后,是如下图所示的效果,数据源有4条数据,源表单设计了6条数据的位置,绑定数据源后,原本的25,26行被删除,包括table及table 外的表单。

image

在新版本中,绑定数据源后,效果如下图,table 内的行数减少,并未影响右侧表单其他部分的样式:

image

为解决这种差异,在绑定数据源之前,可以添加如下的代码,思路是判断sheet中的table 有没有绑定数据源,如果绑定了数据源,就根据数据源的行数提前在sheet上新增或删除行,添加这样的逻辑后可以保持与原来版本的效果一致。

function beforeSetDataSource(sheet, source) {
console.log("source=", source);
sheet.suspendPaint();
var deleteTables = [];
for (let i = 0; i < sheet.tables.all().length; i++) {
	var table = sheet.tables.all()[i];
	var bindingPath = table.bindingPath();
	for (let i in source.xf) {
	if (i == bindingPath) {
		var length = source.xf[i].length;
		var range = table.range();
		if (length > range.rowCount) {
		var rindex = range.row + range.rowCount - 1;
		var rcount = length - range.rowCount + 1;
		sheet.addRows(rindex, rcount);
		break;
		}
		if (length < range.rowCount) {
		var rindex = range.row + range.rowCount - 1;
		var rcount = range.rowCount - length - 1;
		var deleteIndex = rindex - rcount;
		sheet.deleteRows(deleteIndex, rcount);
		break;
		}
	}
	} // debugger
  }
sheet.resumePaint();
}

在数据源的行数小于原先设计的行数时,如果想要保持原先的设计,不删除多余的行,实现思路是在绑定数据源前复制一份表单,绑定数据源后,将原先删除的行复制粘贴至绑定数据源后对应的位置,效果如下图所示:

image

核心代码:

//删除后新增原来的行数不改变样式
function afterInsertRows(sheet, tables) {
// 如果删除了的话,就直接进行instert操作,没有话不执行,放置多种table的情况
if (tables.length > 0) {
	let sheetCount = sheet.getRowCount(GC.Spread.Sheets.SheetArea.viewport);
	console.log("tables", tables);
	tables.forEach(({ table, deleteIndex, rcount, nsheet }, index) => {
	if (index === 0) {
		// 保持行高
		let actualRowHeight = sheet.getRowHeight(deleteIndex - 1);
		sheet.addRows(deleteIndex + 1, rcount);
		for (let key = 0; key < rcount; key++) {
		sheet.setRowHeight(deleteIndex + 1 + key, actualRowHeight);
		}
		var fromRanges = new GC.Spread.Sheets.Range(
		deleteIndex + 1,
		0,
		rcount,
		nsheet.getColumnCount()
		);
		var pastedRange = new GC.Spread.Sheets.Range(
		deleteIndex + 1,
		0,
		rcount,
		sheet.getColumnCount()
		);
		spread.commandManager().execute({
		cmd: "clipboardPaste",
		sheetName: sheet.name(),
		fromSheet: nsheet,
		fromRanges: [fromRanges],
		pastedRanges: [pastedRange],
		isCutting: false,
		clipboardText: "",
		pasteOption: GC.Spread.Sheets.ClipboardPasteOptions.all,
		});
	}
	spread.removeSheet(spread.getSheetIndex(nsheet.name()));
	});
  }
}

详细Demo请见论坛精华帖:SpreadJS 绑定数据源报错问题

作者: GrapeCity China | 审核:AlexZ | 更新时间:2023.09.22