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Ishaan Karnik wrote: Please can someone help me with the serial programming as MSDN was of no help
If you think that is the case, then you are using the wrong search term. I found loads of Serial/RS232 tutorials with VB on MSDN.
Try altering your search!
Henry Minute
Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
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Hi,
You want the SerialPort class.
Luc Pattyn [Forum Guidelines] [My Articles]
- before you ask a question here, search CodeProject, then Google
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get
- use the code block button (PRE tags) to preserve formatting when showing multi-line code snippets
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I meant MSDN was of no help because it confused me.
From where exactly should I start.
I have no experence in this issue and even a begginer in VB.Net.
Do i need to get some dll or I can directly start as shown in MSDN.
I am using Visual Studio 2008.
Thank You.
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Hi,
if you are a beginner in .NET or in one of its languages, then a serial port application is not a good start. You should get well acquainted with the platform before you start tackling a serial communication, since that is, although not very complex, well hard to debug and get it right, since it takes some doing to figure out which end is or isn't doing what.
Once you know .NET and either C# or VB.NET you will need the SerialPort class. There are some good articles on CodeProject about serial communication.
The port being USB connected is rather irrelevant, assuming you install the driver that came with the USB-to-serial cable. The driver turns the port into a regular serial port, so it shows up
in all serial port enumerations, and most/all serial apps can use it, whether
HyperTerminal or some .NET based app using SerialPort class.
The app never is aware the USB-based serial port is connected in a different manner,
all the nasty details are hidden by Windows and the device drivers.
Luc Pattyn [Forum Guidelines] [My Articles]
- before you ask a question here, search CodeProject, then Google
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get
- use the code block button (PRE tags) to preserve formatting when showing multi-line code snippets
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hi
modified 28-Nov-12 8:55am.
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Give a solution for what? We're not going to do your work for you. You need to do the work, and when you hit an actual stumbling block, perhaps we can help.
Scott
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The fact remains that you did not ask any specific questions, so it's not clear what answer you are expecting.
For reading the text file, you may want something like System.IO.File.ReadAllLines.
That gives you an array of strings. It should be easy to move through the array, and parse out each string to obtain the first 'column', although you didn't specify how they are delimited.
Then you'll need some ado.net to query the database, and again some System.IO.File related classes to write out to the text files.
You didn't provide much detail, so I can't provide anything more specific.
Scott
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There are several ways to read and write the data to file. Search web and you will find lots of samples.
जय हिंद
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Honestly, 2 - 4 don't make sense to me. Maybe it's a lack of caffeine today on my part.
Post your code so we can see what you're attempting to do.
Any suggestions, ideas, or 'constructive criticism' are always welcome.
"There's no such thing as a stupid question, only stupid people." - Mr. Garrison
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Hello every one,
I am using VB.net 2005 Express to make a application.
My client keeps me asking some or the other new report. We are code each report and display in grid. After this again print each line as per client's desire.
I want to find a better way to manage reports (Like a report builder). I did a bit of googling around and got really confused.
Can any one plz help me out with some link of something in the above direction
Regards
Nishkarsh
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Try Crystal Reports. The Express Editions of Visual Studio don't come with the reporting goodies that the full versions do.
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Thanks for the input. Do i need t get (buy) Crystal Reports?
I had tried using a report utility available in Sharp Develop 2.2, any idea what is that all about? I tried googeling for it did not get almost any thing on it...
Regards
Nishkarsh
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nishkarsh_k wrote: Do i need t get (buy) Crystal Reports?
Yes.
nishkarsh_k wrote: I had tried using a report utility available in Sharp Develop 2.2, any idea what is that all about?
I've never used SharpDevelop.
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hi
modified 28-Nov-12 9:04am.
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I'm sure that this is just a typo;
cmd = New OleDbCommand("select ITEM_NBR,NPR_DC_NBR,NPR_NBR from E_Ensemb where ITEM_NBR =" + a, cn)
Are you getting an error? If not, does the query return results if you run it manually?
I are troll
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Does the code say
ITEM_NBR" = a, or
ITEM_NBR =" + a, ?
I are troll
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I do hope that you are executing the entire SQL-statement, and not just the piece that I pasted in the previous post
cmd = New OleDbCommand("select * from E_Ensemb where ITEM_NBR = '" + a + "'", cn)How does the SQL statement look if you do it manual? Something like this?
select * from E_Ensemb where ITEM_NBR = '1856977M3'
I are troll
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You're welcome. This is a new question actually, and a lot people won't read it, since it looks like the original question has been answered. New question -> new post
The UNION can be used to combine result-sets, but only if they have the same amount and type of columns. This is allowed:
SELECT 1, 'hello'
UNION
SELECT 2, 'world'
results in:
1, 'hello'
2, 'world'
This isn't allowed:
SELECT 1, 'hello'
UNION
SELECT 2
results in:
1, 'hello'
2, ???
In the latter version SQL server can't "add" the rows into a single set, as they're two different things.
My guess is that you're looking for a JOIN type statement. Do the tables have a corresponding field? Iow, do the tables have a field in common?
I are troll
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i need a project with source code on "college management system" which is used by principal,office staff and librarian..
i need it as early as possible...
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p_m_kanthi wrote: i need a project with source code on "college management system" which is used by principal,office staff and librarian..
Is this..
..homework?
..a job-assignment?
Do you want..
..an application that does these things?
..sourcecode to do these things?
p_m_kanthi wrote: i need it as early as possible...
In that case you better start searching as soon as possible
I are troll
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So, when you get out into the real world and get saddled with programming projects, or other projects for that matter, you're just going to go to a website and ask for someone elses work and turn it in as your own?? How much money do you expect to make in a position like that?? Better yet, how long do you think you're going to be employed?
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