[英]What is the difference between := and = in Excel VBA
我一直在使用Excel进行了一段时间,但我从来没有读过什么是这两个运营商之间的差异(“不管我都用了”) :=
和=
在Excel VBA
As you already know, =
is used to assign values or set objects - eg i=1
如您所知, =
用于分配值或设置对象 - 例如i=1
:=
on the other hand (like Comintern mentioned), is used to to assign a value to a certain named argument, afaik only ever inside a method or function. :=
另一方面(像Comintern提到的那样),用来为某个命名参数赋值,afaik只在一个方法或函数中。
Consider the following example: you could use something like MsgBox "Hello World", , "Title1"
- specifying MsgBox
's arguments in the default order - the prompt
, the default Buttons
-style, then the Title
. 考虑以下示例:您可以使用MsgBox "Hello World", , "Title1"
- 以默认顺序指定MsgBox
的参数 - prompt
,默认的Buttons
style,然后是Title
。
Alternatively, one could use :=
to write MsgBox Title:="Title1", prompt:="Hello world"
或者,可以使用:=
写入MsgBox Title:="Title1", prompt:="Hello world"
Notice that 请注意
the order of the arguments is of no importance here and 参数的顺序在这里并不重要
there is no need to specify empty placeholders for default-arguments , ,
. 没有必要为default-arguments指定空占位符, ,
。
Let us take for example the Range.Find
method 我们以Range.Find
方法为例
expression . 表达 。 Find( What, After, LookIn, LookAt, SearchOrder, SearchDirection, MatchCase, MatchByte, SearchFormat ) 查找( What,After,LookIn,LookAt,SearchOrder,SearchDirection,MatchCase,MatchByte,SearchFormat )
That is a LOT of conditions to set! 这是很多条件! But you just want a simple search of the number 2
in Range("A1:A500")
: 但是你只想在Range("A1:A500")
搜索数字2
Range("A1:A500")
:
Without the :=
operator, you would have to use commas to get to any optional variables to set: 如果没有:=
运算符,则必须使用逗号来获取要设置的任何可选变量:
Range("A1:A500").Find(2, , xlValue, , , , , , )
With the :=
operator, you can specify which conditions you want without delineating through all the default settings: 使用:=
运算符,您可以指定所需的条件,而无需通过所有默认设置进行描述:
Range("A1:A500").Find(what:=2, lookin:=xlValues)
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