如果声明具有多个条件 [英] If statement with multiple condition

问题描述

C＃在单个if中不允许多个条件？或者我犯了错误

我的语法？当我把and和和时，它一直给我语法错误。或或或在

if statemnt用于多个条件检查。


if（（radioAllItems.Checked = TRUE）和

（这个。 lstSelections.SelectedItems.Count< lstSelections.Items.Count））;


谢谢，

Alpha

C# doesn''t allow multiple condition in a single if ? Or did I make a mistake
with my syntax? It keep giving me syntax error when I put "and" or "or" in
the if statemnt for multiple condition checking.

if ((radioAllItems.Checked = TRUE) and
(this.lstSelections.SelectedItems.Count < lstSelections.Items.Count));

Thanks,
Alpha

推荐答案

在C＃中，你使用&& for和，和||为或。另外！=不等于。


Marcie


星期一，2005年4月4日12:01:02 -0700，Alpha ;

< Al *** @ discussion.microsoft.com>写道：

In C#, you use && for and, and || for or. Also != is not equal to.

Marcie

On Mon, 4 Apr 2005 12:01:02 -0700, "Alpha"
<Al***@discussions.microsoft.com> wrote:

C＃在单个if中不允许多个条件？或者我的语法错误了吗？当我把and和和时，它一直给我语法错误。或或或
if statemnt用于多个条件检查。

if（（radioAllItems.Checked = TRUE）和
（this.lstSelections.SelectedItems.Count< lstSelections.Items.Count ））;

谢谢，
Alpha

C# doesn''t allow multiple condition in a single if ? Or did I make a mistake
with my syntax? It keep giving me syntax error when I put "and" or "or" in
the if statemnt for multiple condition checking.

if ((radioAllItems.Checked = TRUE) and
(this.lstSelections.SelectedItems.Count < lstSelections.Items.Count));

Thanks,
Alpha

Alpha，

C＃对逻辑表达式使用不同的语法。对于你想要使用&&，或者你想要使用||，就像这样：


if（（radioAllItems.Checked） = TRUE）&&

（this.lstSelections.SelectedItems.Count< lstSelections.Items.Count））


希望这会有所帮助。 />
-

- Nicholas Paldino [.NET / C＃MVP]

- mv*@spam.guard.caspershouse.com


" Alpha" <铝*** @ discussions.microsoft.com>在消息中写道

新闻：0D ********************************** @ microsof t.com ...

Alpha,

C# uses a different syntax for logical expressions. For and you want to
use &&, for or, you want to use ||, like so:

if ((radioAllItems.Checked = TRUE) &&
(this.lstSelections.SelectedItems.Count < lstSelections.Items.Count))

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"Alpha" <Al***@discussions.microsoft.com> wrote in message
news:0D**********************************@microsof t.com...

C＃在单个if中不允许多个条件？或者我用我的语法犯了一个
错误？当我把and和和时，它一直给我语法错误。用于多条件检查的if statemnt中的或或

if（（radioAllItems.Checked = TRUE）和
（this.lstSelections.SelectedItems） .Count< lstSelections.Items.Count））;

谢谢，
Alpha

C# doesn''t allow multiple condition in a single if ? Or did I make a
mistake
with my syntax? It keep giving me syntax error when I put "and" or "or"
in
the if statemnt for multiple condition checking.

if ((radioAllItems.Checked = TRUE) and
(this.lstSelections.SelectedItems.Count < lstSelections.Items.Count));

Thanks,
Alpha

它的语法：


AND =&&

OR = ||


等式：==（双等于）


if（（radioAllItems.Checked == TRUE）&&

（this.lstSelections.SelectedItems.Count< lstSelections.Items.Count ））

{

//做点什么

}


（也没有分号）在if语句结束时）


Alpha <铝*** @ discussions.microsoft.com>在消息中写道

新闻：0D ********************************** @ microsof t.com ...

Its in the syntax:

AND = &&
OR = ||

equality: == (double equal)

if ((radioAllItems.Checked == TRUE) &&
(this.lstSelections.SelectedItems.Count < lstSelections.Items.Count))
{
// do something
}

(Also no semi-colon at the end of the if statement)

"Alpha" <Al***@discussions.microsoft.com> wrote in message
news:0D**********************************@microsof t.com...

C＃在单个if中不允许多个条件？或者我用我的语法犯了一个
错误？当我把and和和时，它一直给我语法错误。用于多条件检查的if statemnt中的或或

if（（radioAllItems.Checked = TRUE）和
（this.lstSelections.SelectedItems） .Count< lstSelections.Items.Count））;

谢谢，
Alpha

C# doesn''t allow multiple condition in a single if ? Or did I make a
mistake
with my syntax? It keep giving me syntax error when I put "and" or "or"
in
the if statemnt for multiple condition checking.

if ((radioAllItems.Checked = TRUE) and
(this.lstSelections.SelectedItems.Count < lstSelections.Items.Count));

Thanks,
Alpha

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