[翻譯] FastReport 格式化和突出顯示

本文轉載自查看原文 2016-05-27 14:31 2282 Fastreport

一：格式化一個值

聚合函數的一個特征是，返回的數值沒有格式化，如如下例子所示，它使用“SUM”：

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數據字段通常返回一個格式化的值，這是一個沒有任何變化的“文本”對象所顯示的值. 格式化“SUM” 的結果, 讓我們用FastReport中的格式化工具.

雙擊報表上的對象，切換到'Display Format...' 頁進行設置：

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這個編輯器在左邊顯示格式的類別, 相應的格式字符顯示在右邊. 我們選擇 “Number” 分類和 "$1,234.50" 格式. 格式字符串是“Format”函數的一個參數, FastReport使用來實現數字格式的. 格式字符串和小數分隔符可以改變. 如果將小數分隔符留下空白，則使用當前區域設置值.

點擊后ОК並預覽報表，你會發現現在報表的總和是正確的格式:

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Note the combobox at the top of the dialogue form. If we have more than one expression in an object, we may set different formatting for each expression.

二：內部格式化

內部格式化允許你在對象上設置不同的格式化字符串表達式. 這個被用於以前版本的FastReport. 現在是過時的(使用格式化對話為每個表達式設置不同的格式).

使用例子, re-size the footer and its object and change the object text to this:

Total: [SUM(<Group."ItemsTotal">,MasterData1)]

Number: [COUNT(MasterData1)]

The total and the number of orders will be displayed in the object.

In the report preview both of these values are shown in monetary format, which we had previously set. This is incorrect:

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To display each value in its correct format they need to be formatted individually. To do this we use format tags, which are placed just before the closing square bracket of the expression. In our example, disable formatting for the object (select “Text (no formatting)” category in the format editor). Now we need to specify the format for just the first expression, as the second one will be displayed correctly by default (i.e. as an integer). Change the object text as follows:

Sum: [SUM(<Group."ItemsTotal">,MasterData1) #n%2,2m]

Number: [COUNT(MasterData1)]

Preview the report to make sure that the object is displayed correctly:

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The general syntax of format tags is:

[expression #formattag]

Note that the space character between the expression and the “#” symbol is mandatory! The format tag itself might look like:

#nformat_string – numerical format

#dformat_string – date/time format

#bFalse,True – boolean format

Format_string in each case is the argument to the function used for formatting. So, for numerical formatting the Delphi Format function is used, and for date/time the FormatDateTime function. The syntax for these functions can be found in the Delphi help system. Below are several values used in FastReport:

for numerical formatting:

%g – number with the minimal places after the decimal point

%2.2f – number with a fixed number of places after the decimal point

%2.2n – as previous, but with thousands separator

%2.2m – monetary format, accepted by the Windows OS, dependent on the regional settings in the control panel

for date/time formatting:

dd.mm.yyyy – date as '23.12.2003'

dd mmm yyyy – date as '23 Nov 2003'

dd mmmm yyyy – date as '23 November 2003'

hh:mm – time as '23:12'

hh:mm:ss – time as '23:12:00'

dd mmmm yyyy, hh:mm – date and time as '23 November 2003, 23:12'

A comma or a dash can be used instead of the dot in the format_string for numerical formatting. This symbol is used as the separator between the integer and the fractional parts of the value. Any other character is not allowed.

For formatting with the “#b” type (boolean), the format_string is entered as two values separated by a comma. The first value corresponds to “False” and the second to “True”.