数字设置

如何设置数字和日期的显示格式

Microsoft Excel的一个非常强大的特性是它允许用户设置数字值和日期的显示格式。我们知道，数字数据可以用来表示不同的值，包括小数、货币、百分比、分数或会计值等。所有这些数值根据表示的信息类型以不同的格式显示。类似地，日期或时间可以以多种格式显示。 Aspose.Cells for Python via .NET支持此功能，允许开发人员为数字或日期设置任何显示格式。

如何在Microsoft Excel中设置显示格式

在Microsoft Excel中设置显示格式：

右键单击任何单元格。
选择设置单元格格式。将会出现一个对话框，用于设置任何类型值的显示格式。

在对话框左侧，有许多类别的值，如常规、数字、货币、会计、日期、时间、百分比等。Aspose.Cells for Python via .NET支持所有这些显示格式。

Aspose.Cells for Python via .NET提供了Workbook类，代表一个Microsoft Excel文件。Workbook类包含一个worksheets集合，允许访问Excel文件中的每个工作表。工作表由Worksheet类表示。Worksheet类提供一个cells集合，集合中的每个项目代表一个Cell类的对象。

Aspose.Cells for Python via .NET为get_style和set_style方法提供支持，用于Cell类。这些方法用于获取和设置单元格的格式。Style类提供一些有用的属性，用于处理数字和日期的显示格式。

如何使用内置数字格式

Aspose.Cells for Python via .NET提供一些内置的数字格式，用于配置数字和日期的显示格式。这些内置数字格式可以通过使用Number属性应用于Style对象。所有内置数字格式都赋予了唯一的数字值。开发人员可以将任何期望的数字值赋予Number属性，从而应用显示格式。这种方法速度快。Aspose.Cells支持的内置数字格式如下所列。

数值	类型	格式字符串
0	General	General
1	Decimal	0
2	Decimal	0.00
3	Decimal	#,##0
4	Decimal	#,##0.00
5	Currency	$#,##0;$-#,##0
6	Currency	$#,##0;[Red]$-#,##0
7	Currency	$#,##0.00;$-#,##0.00
8	Currency	$#,##0.00;[Red]$-#,##0.00
9	Percentage	0%
10	Percentage	0.00%
11	Scientific	0.00E+00
12	Fraction	# ?/?
13	Fraction	# /
14	Date	m/d/yyyy
15	Date	d-mmm-yy
16	Date	d-mmm
17	Date	mmm-yy
18	Time	h:mm AM/PM
19	Time	h:mm:ss AM/PM
20	Time	h:mm
21	Time	h:mm:ss
22	Time	m/d/yy h:mm
37	Currency	#,##0;-#,##0
38	Currency	#,##0;[Red]-#,##0
39	Currency	#,##0.00;-#,##0.00
40	Currency	#,##0.00;[Red]-#,##0.00
41	Accounting	_ * #,##0_ ;_ * “_ ;_ @_
42	Accounting	_ $* #,##0_ ;_ $* “_ ;_ @_
43	Accounting	_ * #,##0.00_ ;_ * “??_ ;_ @_
44	Accounting	_ $* #,##0.00_ ;_ $* “??_ ;_ @_
45	Time	mm:ss
46	Time	h :mm:ss
47	Time	mm:ss.0
48	Scientific	##0.0E+00
49	Text	@

	from aspose.cells import SaveFormat, Workbook
	from datetime import datetime
	from os import os, path

	# For complete examples and data files, please go to https:# github.com/aspose-cells/Aspose.Cells-for-.NET
	# The path to the documents directory.
	dataDir = RunExamples.GetDataDir(".")
	# Create directory if it is not already present.
	IsExists = path.isdir(dataDir)
	if notIsExists:
	os.makedirs(dataDir)
	# Instantiating a Workbook object
	workbook = Workbook()
	# Obtaining the reference of first worksheet
	worksheet = workbook.worksheets[0]
	# Adding the current system date to "A1" cell
	worksheet.cells.get("A1").put_value(datetime.now())
	# Getting the Style of the A1 Cell
	style = worksheet.cells.get("A1").get_style()
	# Setting the display format to number 15 to show date as "d-mmm-yy"
	style.number = 15
	# Applying the style to the A1 cell
	worksheet.cells.get("A1").set_style(style)
	# Adding a numeric value to "A2" cell
	worksheet.cells.get("A2").put_value(20)
	# Getting the Style of the A2 Cell
	style = worksheet.cells.get("A2").get_style()
	# Setting the display format to number 9 to show value as percentage
	style.number = 9
	# Applying the style to the A2 cell
	worksheet.cells.get("A2").set_style(style)
	# Adding a numeric value to "A3" cell
	worksheet.cells.get("A3").put_value(2546)
	# Getting the Style of the A3 Cell
	style = worksheet.cells.get("A3").get_style()
	# Setting the display format to number 6 to show value as currency
	style.number = 6
	# Applying the style to the A3 cell
	worksheet.cells.get("A3").set_style(style)
	# Saving the Excel file
	workbook.save(dataDir + "book1.out.xls", SaveFormat.EXCEL_97_TO_2003)

view raw Cells-Formatting-UsingBuiltInNumberFormats-1.py hosted with ❤ by GitHub

如何使用自定义数字格式

要为设置显示格式定义自定义的格式字符串，请使用Style对象的custom属性。这种方法不像使用预设格式那样快，但它更灵活。

	from aspose.cells import SaveFormat, Workbook
	from datetime import datetime
	from os import os, path

	# For complete examples and data files, please go to https:# github.com/aspose-cells/Aspose.Cells-for-.NET
	# The path to the documents directory.
	dataDir = RunExamples.GetDataDir(".")
	# Create directory if it is not already present.
	IsExists = path.isdir(dataDir)
	if notIsExists:
	os.makedirs(dataDir)
	# Instantiating a Workbook object
	workbook = Workbook()
	# Adding a new worksheet to the Excel object
	i = workbook.worksheets.add()
	# Obtaining the reference of the newly added worksheet by passing its sheet index
	worksheet = workbook.worksheets[i]
	# Adding the current system date to "A1" cell
	worksheet.cells.get("A1").put_value(datetime.now())
	# Getting the style of A1 cell
	style = worksheet.cells.get("A1").get_style()
	# Setting the custom display format to show date as "d-mmm-yy"
	style.custom = "d-mmm-yy"
	# Applying the style to A1 cell
	worksheet.cells.get("A1").set_style(style)
	# Adding a numeric value to "A2" cell
	worksheet.cells.get("A2").put_value(20)
	# Getting the style of A2 cell
	style = worksheet.cells.get("A2").get_style()
	# Setting the custom display format to show value as percentage
	style.custom = "0.0%"
	# Applying the style to A2 cell
	worksheet.cells.get("A2").set_style(style)
	# Adding a numeric value to "A3" cell
	worksheet.cells.get("A3").put_value(2546)
	# Getting the style of A3 cell
	style = worksheet.cells.get("A3").get_style()
	# Setting the custom display format to show value as currency
	style.custom = "£#,##0;[Red]$-#,##0"
	# Applying the style to A3 cell
	worksheet.cells.get("A3").set_style(style)
	# Saving the Excel file
	workbook.save(dataDir + "book1.out.xls", SaveFormat.EXCEL_97_TO_2003)

view raw Cells-Formatting-UsingCustomNumber-1.py hosted with ❤ by GitHub

如果使用custom属性设置数字格式，则会覆盖之前使用number属性设置的格式，反之亦然。

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