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how do i change the vb project into a dll and then in th c# app how do i get it to start.
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Ashley Staggs wrote: how do i change the vb project into a dll
when you create a new project you are given a choice between many possibilities, one
of them is a "class library" or something like that. So create one of those, copy/paste
almost all your code in there, and just leave an almost empty program in your original exe
project.
Ashley Staggs wrote: how do i get it to start.
if the dll basically holds a Form derivative, you instantiate and show it.
Luc Pattyn [Forum Guidelines] [My Articles]
This month's tips:
- 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 PRE tags to preserve formatting when showing multi-line code snippets.
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I dont know how to control ports of serial of my computer with programming.
I want to know the code of it and exactly how to tell the computer that i want it to turn on the outputs of the ports.
I am very thankful if you give me the code in c# and tell me how to wark with it.![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
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Hi,
you want the SerialPort class (available since .NET 2.0)
open the port, then write data to operate the TxD line, and/or use the appropriate
properties (such as DtrEnable) to control the control lines.
Warning: turn off hardware handshaking if you want to be in charge of some of those lines!
Advice: read all the MSDN pages on SerialPort, AND search CodeProject for SerialPort articles
and read some of those as well.
Luc Pattyn [Forum Guidelines] [My Articles]
This month's tips:
- 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 PRE tags to preserve formatting when showing multi-line code snippets.
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Hi,
Can anyone tell me how the normal parameter in C# are passed? is it by Ref? or just value?
Cuz i'm getting a bit problem with my code. I have this code that calculates statistics and for that i need to sort() my array. but this method also (somehow) is being applied to the array that i passed into the function...
for i.e.
<br />
private int iAnswer(ArrayList arData)<br />
{<br />
arData.Sort();<br />
}<br />
<br />
text1.Text = iAnswer(arNum).ToString();<br />
So what i'm trying to say is that when i do arData.Sort() it also sorts arNum somehow??!!
- Stop thinking in terms of limitations and start thinking in terms of possibilities -
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C# parameters are passed by value. But there are some sutle things here. C# has reference-base objects and value-based objects. For the reference-based object, you can think it as an object holding an address. So, when you pass them to a function, only the address will be copied. For your code, the last line passed arNum to iAnswer. iAnswer copy the address holded by arNum to it's own parameter, arData. When you sort arData, the real object that is pointed by arData and arNum will be changed.
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Bert delaVega wrote: The ArrayList is a object, so it's allocated to the heap (a reference type). So in your case it is by ref.
That is not correct. It's a reference that is passed as a parameter, but it's not passed by reference. The reference itself is copied and sent as a parameter, it's not a reference to the reference that is sent as a parameter.
Despite everything, the person most likely to be fooling you next is yourself.
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Hi,
if you are familiar with older languages such as C, it is very similar:
1. simple things (int, double) get copied (pass by value);
2. for complex things (strings, class instances) a pointer is passed (so there is no object
copied, it is the same object you get). Whether you call this by value or by ref however
is a bit confusing (you can optionally add a ref keyword to increase the level of indirection
by one)
Luc Pattyn [Forum Guidelines] [My Articles]
This month's tips:
- 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 PRE tags to preserve formatting when showing multi-line code snippets.
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Thank you all for your reply. It really helped me to understand this concept.
- Stop thinking in terms of limitations and start thinking in terms of possibilities -
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I m new in C# please give me code for datageid conectivity with database.
Thanx in advance
help as a alias.
Be happy and make others happy.Cheer up...........
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Use google for this also in codeproject you can get multiple articels
Keyword to search DataGrid+databind
Sarvesh Upadhyay
Senior Software Engineer
Birlasoft India Ltd.
Microsoft Certified Professional Developer in Dotnet 2.0 Enterprise Application
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thanx
help as a alias.
Be happy and make others happy.Cheer up...........
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using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
class TextFile
{
public static void Main(string[] args)
{
string inFile;
string yazi;
Console.WriteLine("Dosya Ismini Giriniz");
Console.WriteLine("Örnek: d:\\filename.LOG");
inFile = Convert.ToString(Console.ReadLine());
StreamReader dosyaOku = File.OpenText(inFile);
yazi = dosyaOku.ReadLine();
string onEk = " Frequencies -- ";
int i = 1;
while (yazi != null)
{
if (yazi.StartsWith(onEk))
{
string gecici = yazi.Replace(onEk, "");
string[] parcalar = gecici.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
Console.WriteLine(string.Format("{0}\n{1}\n{2}", parcalar[0], parcalar[1], parcalar[2]));
i++;
}
yazi = dosyaOku.ReadLine();
}
Console.ReadLine();
dosyaOku.Close();
StreamWriter sw = new StreamWriter(@"C:\filename.LOG");
sw.WriteLine(string.Format("{0}\n{1}\n{2}", parcalar[0], parcalar[1], parcalar[2]));
sw.Flush();
sw.Close();
}
}
ERROR:(37,53): error CS0103: The name 'parcalar' does not exist in the current context
I want to write to text file after file is readed(modicificated) that is , I want to write output data but I cant be able to
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It means that you've declared parcalar in the wrong place. Move the declaration to before the while and it will be visible. So, you get
string[] pacalar = null; However, you do know that you are only going to write one line to the file don't you?
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"However, you do know that you are only going to write one line to the file don't you? "
mr.pete as your told it is writed one line to the file but i want to as a column by reading all line. please help me.
sample:
1456
4596
122.2
145.4
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Move the declaration of the streamwriter before the while loop, and write to it when you need to then close it afterwards.
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I test to your said but this time code isnt run (
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using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
class TextFile
{
public static void Main(string[] args)
{
string inFile;
string yazi;
Console.WriteLine("Dosya Ismini Giriniz");
Console.WriteLine("Örnek: d:\\filename.LOG");
inFile = Convert.ToString(Console.ReadLine());
StreamReader dosyaOku = File.OpenText(inFile);
yazi = dosyaOku.ReadLine();
string onEk = " Frequencies -- ";
int i = 1;
string[] parcalar = null;
while (yazi != null)
{
if (yazi.StartsWith(onEk))
{
string gecici = yazi.Replace(onEk, "");
string[] parcalar = gecici.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
Console.WriteLine(string.Format("{0}\n{1}\n{2}", parcalar[0], parcalar[1], parcalar[2]));
i++;
}
yazi = dosyaOku.ReadLine();
}
Console.ReadLine();
dosyaOku.Close();
StreamWriter sw = new StreamWriter(@"C:\filename.LOG");
sw.WriteLine(string.Format("{0}\n{1}\n{2}", parcalar[0], parcalar[1], parcalar[2]));
sw.Flush();
sw.Close();
}
}
firstly thanks for help you.
later ERROR:(28,26): error CS0136: A local variable named 'parcalar' cannot be declared in this scope because it would give a different meaning to 'parcalar', which is already used in a 'parent or current' scope to denote something else
called file contents:
Frequencies -- 1093.5623 1094.7121
Red. masses -- 6.4909 1.3756
Frc consts -- 4.5735 0.9713
Frequencies -- 0.0002 0.0400
Raman Activ -- 0.0000 0.0000
Depolar (P) -- 0.7162 0.6260
Frequencies -- 0.8346 0.7700
output data
1093.5623
1094.7121
0.0002
0.0400
0.8346
I want to write to a file, "OUTPUT DATAS"
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You've decalred the variable parcalar twice, although in different scopes. The problem is the compiler would have no way of knowing to which you were refering so it will give you that compile time error.
Remove the 'string[]' from the second declaration.
Also try using pre tags with code to preserve indenting. You'll get more help.
I'm largely language agnostic
After a while they all bug me 
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Hi all,
I am looping through a series of directories moving files fom one place to another, this i haven't got a problem with.
My query finds all files and moves them without a problem with the exception of all the .zip files.
This has me stumped.
I can get the FileInfo for the zip files and response.write the name onto the page, so I know they're being found, however the File.Copy isn't moving them.
I am running the query under an if (FileName.Extension.toString() == ".zip")
which works for writing the name, just not copying the files?
Please help if you can, many thanks in advance
Mark
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private void Form1_Load(object sender, EventArgs e)<br />
{<br />
File.Copy(@"C:\Demo2.zip", @"C:\NewDemo2.zip");<br />
}
Seems to work fine with me.... 
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Here's a tip: Learn how to debug. It will be far more efficient than posting a question in a forum every time something like this happens.
led mike
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Hi All,
I thought it would be simple solution but not really being able to crack it.
I have a webservice which acts as data provider to the client which is a windows application. The webservice has various web methods and I have written them in a way that they share same SQLTransaction object while retrieving data.
WebService has BeginTransaction(), CommitTransaction() and RollbackTransaction() methods. when I want to perform an operation (which typically consists of 3/4 webmethod calls) I call BeginTransaction() first and CommitTransaction() or RollbackTransaction() after the operation is finished or in case of exception.
The problem:
If the user makes the application to end using task manager after BeginTransaction() has been called and before CommitTransaction() or RollbackTransaction() is called. When next time the application is launched, it fails to fetch data and gets stuck attempting to retieve it. This is because the previous transaction is still locking the tables!
Well, It might take long to read the post but I thought it was important to explain it in detail.
Can anyone think of any way out?
Thanks in Advance
AD
Every bit counts
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The odds of that happening are EXTREMELY Slim...
It's like the "If x is saving, and I have a Power Failure, then it crashes next time it starts up."
type of question.
Although, maybe in your case you could have a true / false setting which decides if the transaction is in process, with a timeout. If it expires, it automatically rolls back.
Just an idea 
- Reelix
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