C# 替代使用 InStr
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Alternative to using InStr
提问by XK8ER
how can I use a different function "InStr" this is the code that I am using and works fine but moving away from InStr is my goal
如何使用不同的函数“InStr” 这是我正在使用的代码并且工作正常但远离 InStr 是我的目标
i = InStr(1, Hostname, Environment.Newline)
采纳答案by ??ssa P?ngj?rdenlarp
String.Indexof()with several overloads:
String.Indexof()有几个重载：
Dim jstr = "How much wood could a woodchuck chuck if a woodchuck..."
' Find a character from a starting point
ndx = jstr.IndexOf("w"c) ' == 2 (first w)
' or within a range:
ndx = jstr.IndexOf("o"c, 12) ' == 15 first o past 12 (cOuld)
'Find a string
ndx = jstr.IndexOf("wood") ' == 9
' ...from a starting point
ndx = jstr.IndexOf("wood", 10) ' == 22 (WOODchuck)
' ...or in part of the string
ndx = jstr.IndexOf("chuck", 9, 15) ' -1 (none in that range)
' using a specified comparison method:
ndx = jstr.IndexOf("WOOD", StringComparison.InvariantCultureIgnoreCase) ' 9
ndx = jstr.IndexOf("WOOD", nFirst, StringComparison)
ndx = jstr.IndexOf("WOOD", nFirst, nLast, StringComparison)
There is also a String,LastIndexOf()method to get the last occurance of something in a string also with a variety of overloads.
还有一种String,LastIndexOf()方法可以使用各种重载来获取字符串中某事物的最后一次出现。
Available in MSDNor Object Browser (VIEW menu | Object Browser) in the VS near you.
在MSDN或您附近的 VS 中的对象浏览器（VIEW 菜单 | 对象浏览器）中可用。
i = Hostname.Indexof(Environment.Newline, 1)
回答by Alezis
If you need equivalent C# code you can use Stringsclass from Microsoft.VisualBasicassembly, thus code can be like following:
如果您需要等效的 C# 代码，您可以使用程序集中的Strings类Microsoft.VisualBasic，因此代码如下：
using Microsoft.VisualBasic;
. . .
i = Strings.InStr(1, Hostname, Environment.NewLine);
Another approach is using appropriate String.Indexoffunction.
另一种方法是使用适当的String.Indexof函数。
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