如何使用 Office 脚本删除表中的所有行

Question

我的电子表格中有一个表格，我想删除所有现有数据。我使用下面的代码，除非表格已经为空，否则该代码有效。

// Get the row count
let rowCount = table.getRangeBetweenHeaderAndTotal().getRowCount();

// Delete all the rows
table.deleteRowsAt(0,rowCount);

问题是即使表为空，rowCount 也会返回 1。当deleteRowsAt尝试删除空表中的行时，它会返回错误。

在 VBA 中我们可以使用table.ListRows.Count，如果表为空，这将返回 0。

示例：我的表中有 3 行

如果我选择所有行并将它们从表中删除，我会得到以下结果：

该表现在没有行，但我无法获得此结果。正如我所说，在 VBA 中我们将使用table.ListRows.Count它，这将返回 0，但我似乎找不到 Office 脚本的等效项。

Answer 1

UPDATE:

We now have getRowCount API on the table that you can use to solve this scenario. It'll return the actual rows (not counting the header or expansion row).

    // Assuming there's a table in the workbook named Table1
    let rowCount = workbook.getTable('Table1').getRowCount(); // Table1
    // Assuming there's a table in the workbook
    let rowCount = workbook.getTables()[0].getRowCount(); // First table

====

OLD ANSWER

I think we are lacking an API that will provide row count. We'll add that to the backlog. A workaround is this -

function main(workbook: ExcelScript.Workbook) {
  let table = workbook.getTable("Table26");
  let rowCount = table.getRangeBetweenHeaderAndTotal().getRowCount();
  try { 
    table.deleteRowsAt(0, rowCount);
  } catch (e) {
    if (rowCount === 1 && e.code === 'InvalidArgument') {
       console.log("This error means there's no row to delete.")
    }
  }
}

If row count is 1 and the error code is a specific one that's returned when we delete the 'insert-row', then we can ignore the error. Again, a better approach would be to use an API on the table object to get the row count and delete rows only when row count >= 1. We'll investigate further to improve the experience.