473,385 Members | 1,630 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,385 software developers and data experts.

Reading a Block of Characters into a String

I have huge image files, from which I need to read only the first 20,000
characters, looking for a particular substring. The closest I've come to
being able to do that is with the StreamReader. But the ReadBlock only
gives you a char array and the ReadToEnd, which does read into a string,
would take about an hour.

How can I read into a string the first 20,000 characters of an image file?
Thanks.
Nov 21 '05 #1
2 1061
Phil Galey wrote:
The closest
I've come to being able to do that is with the StreamReader. But the
ReadBlock only gives you a char array


Once you've got your data into a char array, you can easily convert it into
a string as follows:

\\\
Dim s As New String(yourCharArray)
///

--

(O) e n o n e
Nov 21 '05 #2
Thanks.
Nov 21 '05 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

9
by: javastudent | last post by:
Hi, I am implementing a server that reads for socket connections at a port, and processes the socket on a separate thread. We do not control the client implementation. Here is the scenario. ...
3
by: muser | last post by:
With the following code I'm trying to read a text file (infile) and output inaccuracies to the error file (printerfile). The text file is written and stored on disk, while the printerfile has to be...
1
by: muser | last post by:
The following program reads two lines of a file in my A drive and reads no more. Can some sarmartian tell me why that is. Please copy and paste the program into your own compiler please. ...
1
by: inkapyrite | last post by:
Hi all. I'm using ifstream to read from a named pipe but i've encountered an annoying problem. For some reason, the program blocks on reading an ifstream's internal buffer that's only half-filled....
20
by: sahukar praveen | last post by:
Hello, I have a question. I try to print a ascii file in reverse order( bottom-top). Here is the logic. 1. Go to the botton of the file fseek(). move one character back to avoid the EOF. 2....
3
by: Fernando Arbeiza | last post by:
Hi: I need some clarification about a code like this: printf("%s", "a string with NO trailing newline"); scanf("%d", &i); Regarding if a fflush() of the standard output is needed or not. I...
11
by: Freddy Coal | last post by:
Hi, I'm trying to read a binary file of 2411 Bytes, I would like load all the file in a String. I make this function for make that: '-------------------------- Public Shared Function...
6
by: efrenba | last post by:
Hi, I came from delphi world and now I'm doing my first steps in C++. I'm using C++builder because its ide is like delphi although I'm trying to avoid the vcl. I need to insert new features...
1
by: ndedhia1 | last post by:
I was reading in a log file like this that had no milliseconds: QuoteBlockTiming exceeded 1 ms: 1 --- Thu Dec 10 02:01:40 CST 2009 170.137.15.155 Class key = 601650761 block size QuoteBlockTiming...
1
by: CloudSolutions | last post by:
Introduction: For many beginners and individual users, requiring a credit card and email registration may pose a barrier when starting to use cloud servers. However, some cloud server providers now...
0
by: Faith0G | last post by:
I am starting a new it consulting business and it's been a while since I setup a new website. Is wordpress still the best web based software for hosting a 5 page website? The webpages will be...
0
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 3 Apr 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome former...
0
by: ryjfgjl | last post by:
In our work, we often need to import Excel data into databases (such as MySQL, SQL Server, Oracle) for data analysis and processing. Usually, we use database tools like Navicat or the Excel import...
0
by: taylorcarr | last post by:
A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...
0
by: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
0
by: aa123db | last post by:
Variable and constants Use var or let for variables and const fror constants. Var foo ='bar'; Let foo ='bar';const baz ='bar'; Functions function $name$ ($parameters$) { } ...
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.