Parsing string from byte array, Convert byte array to string

Question

3.00/5 (2 votes)

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I want parse or convert ;rb(7167) As Byte to String.

My code example is below:

VB

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

Posted 17-Mar-11 2:57am

AHBB

Updated 17-Mar-11 3:08am

v4

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Comments

CPallini 17-Mar-11 9:10am

Where is the question?

[no name] 17-Mar-11 9:18am

What error it shows?

Sergey Alexandrovich Kryukov 17-Mar-11 17:00pm

By the way, use string.Empty, not "".
--SA

2 solutions

Solution 2

A side advice: your code shows very poor performance in string concatenation "&". Your should always use Text.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 the StringBuilder, 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 only Text.StringBuilder does a good job.

As I already said, don't use "", use string.Empty.

—SA

Posted 17-Mar-11 11:08am

Sergey Alexandrovich Kryukov

Comments

Espen Harlinn 17-Mar-11 19:17pm

While I agree on your notes on StringBuilder, he currently has a stream containing the html returned by his request, so I guess wrapping the stream in a System.IO.TextReader would be a nice solution. Your suggestion would still do wonders for the performance, so my 5

Sergey Alexandrovich Kryukov 17-Mar-11 22:07pm

Thank you for understanding and your vote. I completely agree. My advices simply addressed the OP's code in front of me.
--SA

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E.F. Nijboer · Accepted Answer · 2011-03-17T03:20:00

Solution 1

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!

Posted 17-Mar-11 3:20am

E.F. Nijboer

Comments

AHBB 17-Mar-11 10:14am

thanks. my 5

Espen Harlinn 17-Mar-11 10:24am

Nice link, my 5