在字符串中搜索多个内容 [英] Search for multiple things in a string

问题描述

你能在另一个字符串中搜索多一个字符串吗？


类似于：


someString.IndexOf（" something1"，" something2"，some thing3，0）


或者你需要做类似的事情：


if （（someString.IndexOf（" something1"，0）> = 0）||

（（someString.IndexOf（" something2"，0）> = 0）||

（（someString.IndexOf（" something3"，0）> = 0））

{

做点什么

}


谢谢，


Tom

Can you do a search for more that one string in another string?

Something like:

someString.IndexOf("something1","something2","some thing3",0)

or would you have to do something like:

if ((someString.IndexOf("something1",0) >= 0) ||
((someString.IndexOf("something2",0) >= 0) ||
((someString.IndexOf("something3",0) >= 0))
{
Do something
}

Thanks,

Tom

推荐答案

Tom，


您最好的选择是使用正则表达式。您可以使用System.Text.RegularExpressions命名空间中的

类来执行此操作。


希望这会有所帮助。

-

- Nicholas Paldino [.NET / C＃MVP]

- mv*@spam.guard.caspershouse.com


" tshad" < TS ********** @ ftsolutions.com>在留言中写道

新闻：OO ************** @ TK2MSFTNGP09.phx.gbl ...

Tom,

Your best bet would be to use a regular expression. You can use the
classes in the System.Text.RegularExpressions namespace to do this.

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

"tshad" <ts**********@ftsolutions.com> wrote in message
news:OO**************@TK2MSFTNGP09.phx.gbl...

你能做一个搜索吗？对于另一个字符串中的一个字符串更多吗？

someString.IndexOf（" something1"，" something2"，" some thing3"，0）

或者你需要做的事情如下：

if（（someString.IndexOf（" something1"，0）> = 0）||
（（someString.IndexOf（" something2"，0）> = 0）||
（（someString.IndexOf（" something3"，0）> = 0））
{}

谢谢，

Tom

Can you do a search for more that one string in another string?

Something like:

someString.IndexOf("something1","something2","some thing3",0)

or would you have to do something like:

if ((someString.IndexOf("something1",0) >= 0) ||
((someString.IndexOf("something2",0) >= 0) ||
((someString.IndexOf("something3",0) >= 0))
{
Do something
}

Thanks,

Tom

" Nicholas Paldino [.NET / C＃MVP]"< mv*@spam.guard.caspershouse.com>写在

消息新闻：O5 ************* @ TK2MSFTNGP12.phx.gbl ...

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.com> wrote in
message news:O5*************@TK2MSFTNGP12.phx.gbl...

Tom，

你最好的选择是使用正则表达式。你可以使用系统中的
类.Text.RegularExpr essions命名空间来做到这一点。


这对多个if测试更合适吗？


我不知道哪个更有效率。对于所有不同的物品，两者都必须返回并测试

。


谢谢，


Tom <希望这会有所帮助。

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

tshad < TS ********** @ ftsolutions.com>在消息中写道
新闻：OO ************** @ TK2MSFTNGP09.phx.gbl ...

Tom,

Your best bet would be to use a regular expression. You can use the
classes in the System.Text.RegularExpressions namespace to do this.
This would be preferrable to the multiple if tests?

I don''t know which is more efficient. Both would have to go back and test
for all the different items.

Thanks,

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

"tshad" <ts**********@ftsolutions.com> wrote in message
news:OO**************@TK2MSFTNGP09.phx.gbl...

你可以搜索更多的那个字符串在另一个字符串中？

类似于：

someString.IndexOf（" something1"，" something2"，" some thing3"，0）

或者你必须做类似的事情：

if（（someString.IndexOf（" something1"，0）> = 0）||
（（someString。 IndexOf（" something2"，0）> = 0）||
（（someString.IndexOf（" something3"，0）> = 0））
{
做点什么
}

谢谢，

Tom

Can you do a search for more that one string in another string?

Something like:

someString.IndexOf("something1","something2","some thing3",0)

or would you have to do something like:

if ((someString.IndexOf("something1",0) >= 0) ||
((someString.IndexOf("something2",0) >= 0) ||
((someString.IndexOf("something3",0) >= 0))
{
Do something
}

Thanks,

Tom

tshad< ts ********** @ ftsolutions.com>写道：

tshad <ts**********@ftsolutions.com> wrote:

您最好的选择是使用正则表达式。可以使用System.Text.RegularExpressions命名空间中的
类来执行此操作。

Your best bet would be to use a regular expression. You can use the
classes in the System.Text.RegularExpressions namespace to do this.

这将是preferra如果进行测试，可以使用多个？

我不知道哪个更有效率。两者都必须回去测试所有不同的项目。

This would be preferrable to the multiple if tests?

I don''t know which is more efficient. Both would have to go back and test
for all the different items.

就个人而言，我会选择if。测试 - 可能使用辅助方法

使用params字符串数组来提高可读性 - 除非性能确实是一个问题，在这种情况下测量性能和那个/>
的正则表达式是绝对必要的。


正则表达式非常强大，但可能更难阅读

比一系列非常简单的字符串操作。


-

Jon Skeet - < sk *** @ pobox.com>
http://www.pobox.com/~skeet

如果回复该组，请不要给我发邮件

Personally, I''d go for the "if" tests - possibly with a helper method
using a params string array to aid readability - unless the performance
is really a problem, in which case measuring that performance and that
of the regular expressions would be an absolute necessity.

Regular expressions are really powerful, but can be much harder to read
than a series of very simple string operations.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

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