C# Discussion Boards - CodeProject

Evy_Soza25-Aug-06 7:02

25-Aug-06 7:02

Hi,

I'm very new in programing, I create a report in Crystal reports and I want to call it from my project in sharp develop.

Somebody could me explain step by step what things I have to do?

I'm using sharp develop 2.0.0 Build 1591.

Thanks

use C# function in VB

VK-Cadec25-Aug-06 3:57

VK-Cadec

25-Aug-06 3:57

Hi,

We have a function which parses csv into datatables written in C#

Want to use this function in my VB.net code. How would we go about doing this? I tried using the function name nd it doesn't seem to work, it comes back with swiggly lines. using VS 2005.

thanks.

Re: use C# function in VB

Not Active25-Aug-06 4:08

Not Active

25-Aug-06 4:08

Your best bet would be to give up the whole VB.NET thing and go with C# Poke tongue | ;-P

If the function is in an assembly that you have included in your project, then you should be able to use it within you VB.NET code by instantiating an instance of the class and calling the function.

only two letters away from being an asset

Re: use C# function in VB

VK-Cadec25-Aug-06 5:49

VK-Cadec

25-Aug-06 5:49

we should be able to use either without issues - .cs and .vb

Re: use C# function in VB

Not Active25-Aug-06 6:04

Not Active

25-Aug-06 6:04

You can, but not the way you are trying.

only two letters away from being an asset

Re: use C# function in VB

Judah Gabriel Himango25-Aug-06 4:43

Judah Gabriel Himango

25-Aug-06 4:43

Just add a reference in your VB.NET project to the dll containing the C# function. In your VB.NET code, you'll can then call the C# function as if it were written in VB.NET.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Dumbest. Movie. Title. Evaaar.
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

Re: use C# function in VB

VK-Cadec25-Aug-06 5:48

VK-Cadec

25-Aug-06 5:48

it is not a separate project. I am adding this .cs file into a vb.net project.

this .cs is reading a csv file and returning a datatable.

Thanks.

Re: use C# function in VB

Judah Gabriel Himango25-Aug-06 5:54

Judah Gabriel Himango

25-Aug-06 5:54

Sorry, that won't work. A project must be entirely in one language. If you need to use multiple languages, use multiple projects in a single solution.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Dumbest. Movie. Title. Evaaar.
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

Re: use C# function in VB

Dave Kreskowiak25-Aug-06 5:58

Dave Kreskowiak

25-Aug-06 5:58

That won't work; you have to create seperate projects. You cannot combine different languages in the same project. You can, however, combine projects of different languages in the same Solution. Your C# code would have to go into it's own Class Library project, then in your VB.NET project, add a reference to the C# project.

Dave Kreskowiak
Microsoft MVP - Visual Basic

Search DLL before P/Invoke?

Dominik Reichl25-Aug-06 3:03

Dominik Reichl

25-Aug-06 3:03

Hello!

I'm trying to do some P/Invoke, but the native DLL is an optional component, i.e. it isn't sure that it is present.

How can I test if P/Invoke will be able to call the DLL?

Best regards
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: Search DLL before P/Invoke?

Jun Du25-Aug-06 4:27

Jun Du

25-Aug-06 4:27

Can you test the DLL's existence before calling DllImport()?

Best,
Jun

Re: Search DLL before P/Invoke?

Dominik Reichl25-Aug-06 4:32

Dominik Reichl

25-Aug-06 4:32

Well, I'd need to search in several directories (system directory, application directory, etc.), and even if I find a DLL it's not sure that this DLL is really a valid library (could be a text file for example)...

Isn't there any way to test if a loadable DLL is present?

Best regards
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: Search DLL before P/Invoke?

Jun Du25-Aug-06 5:44

Jun Du

25-Aug-06 5:44

As far as I know, there is no way to test if a DLL is loadable, except for catching exceptions when DllImport fails.

Best,
Jun

Re: Search DLL before P/Invoke? [modified]

Dave Kreskowiak25-Aug-06 6:06

Dave Kreskowiak

25-Aug-06 6:06

You might want to look into trying to load the .DLL using the Assembly class. You might also want to look into doing this in a seperate AppDomain so you can unload it.

-- modified at 12:07 Friday 25th August, 2006

Dave Kreskowiak
Microsoft MVP - Visual Basic

Re: Search DLL before P/Invoke?

Andy Moore25-Aug-06 15:03

Andy Moore

25-Aug-06 15:03

No there is not. You could do interop to DllLoadLibrary to see if you can load the DLL this way. If it fails then the dll is not present.

Deus caritas est

Interesting date time comparison

coolestCoder25-Aug-06 2:48

coolestCoder

25-Aug-06 2:48

Hi,
I have a bit of situtation here..

I have to check whether the current time is between two pre-defined time values. But, if the second time value is less than the first, then the second time value must be assumed of next day and then current value should be compared. Details are as below ---

time t1 = 10.00.00 PM
t2 = 11.00.00 AM

Current time should be between these two. But as shown above t1 > t2, in this case i want to assume that t2 will be time of next day. (current day +1). And after these considerations i want to find out whether current time is between these t1 and t2.

Actually i am trying to replicate the night duty schedule. If the current time is between the night timings then some operation must be performed or if it is not between the office timings then the operation will be discarded.

Hope i am clear with the situation !!
Please reply as soon as possible.

<marquee>"A good programmer is someone who looks both ways before crossing a one-way street." -- Doug Linder

Anant Y. Kulkarni

Re: Interesting date time comparison [modified]

Shajeel25-Aug-06 3:08

Shajeel

25-Aug-06 3:08

try this

<br />
DateTime start = DateTime.Parse("10:00:00 PM");<br />
DateTime end = DateTime.Parse("11:00:00 AM");<br />
if(end < start)<br />
{<br />
  if(DateTime.Now < start)<br />
    start = start.AddDays(-1);<br />
  else<br />
    end = end.AddDays(1);<br />
}<br />
<br />
if(start < DateTime.Now && DateTime.Now < end)<br />
{...}

-- modified at 14:48 Friday 25th August, 2006
<edit> Just came to mind that internal if else is also required so added that.

Regards
Shajeel

Sending mail with C# ? Help please ...

cmpeng3425-Aug-06 2:41

cmpeng34

25-Aug-06 2:41

hi all,
how can i use the smtp server installed on my computer in order to send mails using it?

SmtpClient y = new SmtpClient();
>>> y.Host = "???"; //what should i write here ?
y.Send(textBox1.Text, textBox2.Text, textBox5.Text, textBox6.Text);

am i able to send mails to yahoo, hotmail, gmail or other mail servers using my smtp server ???

help me please ...
thanks in advance,
bye.

MFA

Re: Sending mail with C# ? Help please ...

rah_sin25-Aug-06 2:50