This is pankaj vishwakarma a vb.net developer, I am currently working on the printing project.
Here I am creating a custom paper on the printer via code and then trying to print the text on a specified location . It does not
print After trying many time i found that printable area is not changed but it is changing height and width as custom paper still it's printable area remains the same as previous paper
I'm trying to read the contents of a file into an array, but for some reason the values are showing up in the array as nothing? The contents of the file look like this (the file length is about 5,690 lines long)
This is the section of code I have written to attempt to do this
'Read the stock symbols to be copied to a new folder into an arrayDim stocksymbolarrayLong(25000) AsStringDim filecount AsIntegerDim counter AsInteger'Count the lines in the file you are reviewing.Dim LongFile As System.IO.StreamReader
LongFile = System.IO.File.OpenText("C:\Users\George Desktop\Documents\Stock System\Stock Programs\Stock Program Data\LongStockTesting.txt")
filecount = 0Do Until LongFile.Peek = -1
filecount = filecount + 1LoopFor counter = 0To (filecount - 1)
stocksymbolarrayLong(counter) = Val(LongFile.ReadLine)
ReDim Preserve stocksymbolarrayLong(filecount - 1)
' Sort the array's
This should be very simple to do and solve, but i've been looking at it for a couple hours and don't know what I'm doing wrong?
is this VB6 or VB.NET?
how many times can you "read to the end"?
why do you read the file twice? you could extract and store the required data and find out the number of lines in one go (and your problem would suddenly disappear).
if VB.NET, why don't you use a List of Something rather than an array (whose dimension is an implicit limitation to your program)? And are you familiar with File.ReadAllText? File.ReadAllLines?
Luc, thanks for your prompt reply. Below are my replies to your questions.
I'm using VB.NET
I'm not sure I understand what you mean "read to end"?
I read the file twice. Once to get the length and once to read the data. I'm aware I could do it all at once, but I guess it's just poor form on my part. Not sure how this would make the "problem disappear".
The reason I don't use a list is I'm not familiar with lists and how they work. I am also not familiar with file.readalltext and fileradalllines. I'll look them up.
Please keep in mind I'm not someone who writes a lot of programs and has a lot of experience. I know there are better ways to accomplish what I am looking to do, but I'm curious as to why what I'm doing isn't working?
Eddy, I didn't get an error result and no message about my reader. Yes I did look up lists and file.readalllines(). Learned a lot today from some very kind people. I'll probably end up rewriting a few other programs using what I learned.
Yes, I am sorry -it looks like I replied under wrong heading. My post is intended for OP, and not you in any way. Your resolution is what I would have done too, btw .Thanks for letting me clear this up.
have a Great Day Luc!
Well, who I was meaning to refer to regarding readALLLines method-was the poster that offered up the ReadALlLines method of the File class.
Still, you offered a great help explaining why OP code was failing.
That was a good response.
I'm afraid you still haven't figured out why it failed the way you did it. You opened a file, then had a loop reading all its contents (till Peek fails), en then another loop supposed to read all content again. However you never told the file it should restart at the beginning (the again was in your mind, not in your code), so your second loop starts at the end of the file (where it had left off when the first loop ended) and then obviously finds nothing more. To restart a file, either close and open it again, or simply set its Position to zero.
So either do it yourself (as you tried) but do it correctly, or use what is available to tackle the most popular situations, such as File.ReadAllLines(). Quite often, less code also means fewer bugs.
Thank you for explaining what my error was because (as you mention) I never did understand why it didn't work. I actually rewrote my program using file.readalllines() and used a list instead of an array.
Thanks again for helping out. Not only did I get an answer to my original question, but I actually learned a better way to get my desired result.
Hey I'd uses a streamreader. so store your csv file in a variable and read it in a using statement using streamreader and set your array = reader.split(',') or ('/t') depending on what format your csv file is in.
Thanks for taking the time to read my post. I have spent lots of time reading other threads on here and everywhere else I could find and could not find a solution to my issue.
What I am trying to accomplish is to have two way communication between a service and a (single - for now) windows gui interface. I have found some basic examples on the web on how to pass a string to the server and playing around with it I was able to pass a Serializable class to the server and using functions get a class back from the server.
What I don't understand and can't figure out is how to get the server (service) to send an update to a client without the client requesting it, like an event. I found a server/client chat program that this works on but it is too complicated for me to follow and figure out how to do it.
Using the below example I changed the server into a Windows Form Application and then in the CommunicationService class I created a reference to the server form and called a public sub I had defined on it to bring the passed string into it. Although that works it is ugly and I am sure it is not the correct way to do it. How would I make more like a typical even driven system?
Below is an example I found on the net and I started with this to try and figure out how to accomplish my goals. What do I need to change or add to make this work the way I want it to?
PrivateSub cmdSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSend.Click
Dim ipcCh AsNew IpcChannel("myClient")
Dim obj As SharedInterfaces.ICommunicationService = _
Server - CommunicationService Class:
PublicSub SaySomething(ByVal text AsString) Implements SharedInterfaces.ICommunicationService.SaySomething
Console.WriteLine("The client said : " & text)
Server - Main:
Dim ipcCh As IpcChannel
ipcCh = New IpcChannel("IPChannelName")
GetType(CommunicationService), "SreeniRemoteObj", _
Console.WriteLine("Press ENTER to quit")
Sub SaySomething(ByVal text AsString)
Thanks for the reply. I had thought that there must be a way to use remoting like a typical class, define it withevents and then easily pick up events on either side.
After reading some more I decided to use WCF. The duplex part I got working but once again I am struggling with bringing the events (callbacks) into the client form (I have created a reference in the callback class to the client form) but it seems kludgey to me.
I would like to prepare simple crystal report and want to display in vb6 form. Here is the work I have done:
1 Crystal Report Created using Crystal Report 8.5
2 Designed Crystal Report and connect with Oracle 9i
3 Create standard exe project in vb6
4 Added Report which I have created.
5 While running i am getting following error.