如何使用 VB.NET 在字节数组中查找字节
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How to find byte in array of bytes using VB.NET
提问by Afnan Makhdoom
How can I search within an array of byte for a specific byte?
如何在字节数组中搜索特定字节？
For example, I use Instr(String, "something to search")or InstrRev(String, "something to search")for strings. I basically don't want to loop through the byte array, because I have extremely long byte arrays and I want to search bytes in a flash.
例如，我使用Instr(String, "something to search")或InstrRev(String, "something to search")用于字符串。我基本上不想遍历字节数组，因为我有非常长的字节数组，我想快速搜索字节。
I just need the fastest and the simplest code possible for my task.
我只需要最快和最简单的代码来完成我的任务。
What would be a faster quicker and simpler way to search? A byte array of a file, or to stream a file with filestream and then to search within it?
什么是更快更简单的搜索方式？文件的字节数组，还是使用 filestream 流式传输文件然后在其中搜索？
回答by Bj?rn-Roger Kringsj?
The System.Arrayclass exposes many useful methods when working with arrays.
该System.Array的使用数组时类暴露许多有用的方法。
Dim [array] As Byte() = New Byte() {1, 2, 4, 6, 3}
Dim find As Byte = 3
Dim index As Integer = System.Array.IndexOf(Of Byte)([array], find)
If (index = -1) Then
'Not found...
Else
'Found!
End If
回答by Shabeer Shabeer
Use:
用：
Dim Tag As Byte, cTag() As Byte = UTF8Encoding.UTF8.GetBytes("Host: ") ' For poc
Dim Ret As Byte, cTagLength as Byte = cTag.Length 'POS
For Each Ret In cBuffer 'Ret pos seek "Host: "
If cBuffer(Ret) = cTag(Tag) Then
Tag = +1 ' Avryleter
Else
Tag = 0 ' Reset
End If
If Tag = cTagLength Then
Exit For
End If
Next
It still the same code (in VB.NET).
它仍然是相同的代码（在 VB.NET 中）。
