从字节数组解析字符串,将字节数组转换为字符串 [英] Parsing string from byte array, Convert byte array to string
本文介绍了从字节数组解析字符串,将字节数组转换为字符串的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想解析;rb(7167) As Byte
或将其转换为String.
我的代码示例如下:
I want parse or convert ;rb(7167) As Byte
to String.
My code example is below:
Sub help()
Dim HttpWebRequest As HttpWebRequest, HttpWebResponse As HttpWebResponse
HttpWebRequest = WebRequest.Create("http://www.google.com")
HttpWebResponse = HttpWebRequest.GetResponse
Dim rb(64) As Byte
Dim tbr As Integer
tbr = HttpWebResponse.GetResponseStream.Read(rb, 0, 65)
Dim Str As String = ""
'I did
For i = 0 To tbr-1
Str = Str & Strings.Chr(rb(i))
Next
'But i need some thing simple and full data.
End Sub
推荐答案
看看msdn上的示例.这样可以帮助您:
http://msdn.microsoft.com/en-us/library/system. net.httpwebresponse.getresponsestream.aspx [ ^ ]
祝您好运!
Have a look at the example on msdn. That will help you out:
http://msdn.microsoft.com/en-us/library/system.net.httpwebresponse.getresponsestream.aspx[^]
Good luck!
一个建议:您的代码在字符串连接&"中显示出非常差的性能.为此,您应始终使用Text.StringBuilder.Append
.
这就是为什么.
字符串是不可变的.这意味着字符串连接永远不会修改字符串.像在所有字符串操作中一样,将创建一个全新的字符串并复制其他字符串的内容.如果您以循环方式执行此操作,则将不断创建不断增长的目标字符串实例,并一遍又一遍地复制前一个结果.Text.StringBuilder.Append
确实修改了StringBuilder
的实例,因此可以有效地解决问题.
顺便说一句,string.Format
对于一次性操作也更有效,但不应循环使用,因为只有Text.StringBuilder
才能很好地发挥作用.
正如我已经说过的,请不要使用",请使用string.Empty
.
—SA
A side advice: your code shows very poor performance in string concatenation "&". Your should always useText.StringBuilder.Append
for such purposes.
Here is why.
Strings are immutable. It means that string concatenation never modifies a string. Like in all string operations, a brand new string is created and the content of tho other strings are copied. If you do this in cycle, your ever-increasing target string instance is re-created with full copy of the previous result over and over.Text.StringBuilder.Append
really modifies the instance of theStringBuilder
, so it solves the problem efficiently.
By the way,string.Format
is also more efficient for one-time operation, but should not be used in cycle, where onlyText.StringBuilder
does a good job.
As I already said, don''t use "", usestring.Empty
.
—SA
这篇关于从字节数组解析字符串,将字节数组转换为字符串的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文