如何从工作表单元格中获取日期格式字符串? [英] How to get a date format string from a sheet cell?

问题描述

在谷歌脚本函数中，我需要从谷歌表中获取日期值，我已经做了这样的事情

In a google script function I need to get a date value from a google sheets I have done something like this

var csh = SpreadsheetApp.getActiveSheet();
var date = csh.getRange('A1').getValue();
var msg = "date = " + date;

我得到的是这样的

msg = "date = 42323"

如何格式化日期变量以显示为日期

How do I format the date variable to appear as a date

谢谢

推荐答案

正如 jvdh 所说，电子表格中的日期应该自动转换为 Google Apps 脚本中的 JavaScript 日期.到目前为止，我们还听说了您的情况.

As jvdh said, a date in a spreadsheet should be automatically converted to a JavaScript date in Google Apps Script. There's something more to your situation that we've heard so far.

在 2013 年的相关问题中，AdamL 出色地解释了日期的表示方式.他还暗示了一种将电子表格中的数字序列号"(或纪元")日期值转换为 JavaScript 中使用的 Unix 样式值的方法.

On a related question from 2013, AdamL did a great job explaining how dates are represented. He also hinted at a way to convert from the numeric "serial number" (or "Epoch") date value in a spreadsheet to the Unix-style values used in JavaScript.

这是我的那个实用程序的版本.要使用，只需传入从电子表格中读取的值，如下所示:

Here is my version of that utility. To use, just pass in the value read from the spreadsheet, like this:

var csh = SpreadsheetApp.getActiveSheet();
var date = convert2jsDate( csh.getRange('A1').getValue() );
var msg = "date = " + date;

该实用程序可以处理 JavaScript 的 dateString.

The utility can handle existing dates, "serial numbers", or string formats that are supported by JavaScript's dateString.

/**
 * Convert any spreadsheet value to a date.
 * Assumes that numbers are using Epoch (days since 1 Jan 1900, e.g. Excel, Sheets).
 * 
 * @param {object}  value  (optional) Cell value; a date, a number or a date-string 
 *                         will be converted to a JavaScript date. If missing or
 *                         an unknown type, will be treated as "today".
 *
 * @return {date}          JavaScript Date object representation of input value.
 */
function convert2jsDate( value ) {
  var jsDate = new Date();  // default to now
  if (value) {
    // If we were given a date object, use it as-is
    if (typeof value === 'date') {
      jsDate = value;
    }
    else {
      if (typeof value === 'number') {
        // Assume this is spreadsheet "serial number" date
        var daysSince01Jan1900 = value;
        var daysSince01Jan1970 = daysSince01Jan1900 - 25569 // 25569 = days TO Unix Time Reference
        var msSince01Jan1970 = daysSince01Jan1970 * 24 * 60 * 60 * 1000; // Convert to numeric unix time
        var timezoneOffsetInMs = jsDate.getTimezoneOffset() * 60 * 1000;
        jsDate = new Date( msSince01Jan1970 + timezoneOffsetInMs );
      }
      else if (typeof value === 'string') {
        // Hope the string is formatted as a date string
        jsDate = new Date( value );
      }
    }
  }
  return jsDate;
}

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