Re: Very Urgent: Regarding C#.NET - C# Discussion Boards

smadan5-Apr-06 0:12

5-Apr-06 0:12

Hi,

I am working on a web application in ASP.net & C# .For one of the utilities on my site, i need to use an available VC++ project.
This VC++ project produces an exe as its output.
I tried changing the output type of the VC++ project to .dll, but it doesn't help and after this, the project itself stops working.

Can someone please tell me as to how to use this VC++ project into my web application?

Thanks.

Re: .net Language Interoperability

Erich Ledesma30-Mar-10 23:39

Erich Ledesma

30-Mar-10 23:39

There're some very big issues involved here. If your VC++ project produces an exe, it is either a Windows or Console application project. So look bellow. This would work with VS2008, I don't remember how to do it using older versions.

1.- [Easiest] Is the VC++ project a managed project? Go to project properties and take a look under "Common Properties", if this tab works. Allows you to change "Targeted Framework", add references or so. It is a managed project. Solution: Just changed your project output type: Go to "Configuration Properties" > "General" > "Configuration Type" and change it to "Dynamic Library (.dll)". And just try placing the reference in your web.config, it should work. Down side. Global funcions and not managed types are not going to work for you ASP.NET site. All types you'd like to use must be marked as "__gc" or "__value". Take a look to this MSDN link > ms-help://MS.VSCC.v90/MS.MSDNQTR.v90.en/dv_vclang/html/63b1e7ab-d1c8-4582-aa89-21bfddf694a9.htm

2.- [Hardest] Your project is a native one. Solution: First, change the project type, same as above (not mandatory, exe also can export functions). You'll have to make sure you're exporting the funcions you'd like to use from managed code. To see exported functions use "dumpbin.exe /EXPORTS <exe or="" dll="" file="">" from VS command prompt. Then you'll have to create a "wrapper" managed library to access to unmanaged, see this one to use native functions from managed code > ms-help://MS.VSCC.v90/MS.MSDNQTR.v90.en/fxref_mscorlib/html/36830e35-7f2e-b1fa-87ca-144346051059.htm . Down side, most web hostings won't allow you to access to native code, or at lest no more than .NET native libraries or Windows API.

Hope it'll help

How to check Screen saver is running

Shajeel4-Apr-06 23:52

Shajeel

4-Apr-06 23:52

Hi
how can i check whether a screen saver is running or not.

Shajeel

Re: How to check Screen saver is running

scoroop5-Apr-06 22:42

scoroop

5-Apr-06 22:42

tip #1: use google :>

tip #2: http://www.neowin.net/forum/lofiversion/index.php/t298659.html

Smile | :)

Distortation/flickering occur while Open one form & Close another in c#(Windows)

Sushil Badyal4-Apr-06 23:38

Sushil Badyal

4-Apr-06 23:38

Distortation/flickering occur while Open one form & Close another in c#(Windows)

On some Event(e.g Button Click) on Form1

Form2 f=new Form2(ref newDataSet);
f.show();
Form1.close();

i'm also passing some DataSet,Variable to the constructor of Form2

Sushil

-- modified at 5:41 Wednesday 5th April, 2006

Very Urgent: Regarding C#.NET

ballameharmurali4-Apr-06 23:11

ballameharmurali

4-Apr-06 23:11

hi everyone,
Here is my question:
In a WebForm we have taken two dropdownlists say dropdownlist1 and dropdownlist2.In the drop down list1 there is(jpeg image,textdocument) attached to it.
We have taken one folder(folder name temp) on the desktop.This folder contains(jpeg image1,textdocument1,jpegimage2,textdocument2 ).
now my question is on the dropdownlist1 when i click on jpegimage the file which is there on the desktop those two jpeg images i.e,image1 and image2 should be displayed on the dropdownlist2.
plz give me code for this program
thanku,
byeee

murali

Re: Very Urgent: Regarding C#.NET

Ed.Poore5-Apr-06 7:47

Ed.Poore

5-Apr-06 7:47

Do your own homework Dead | X|

Re: Very Urgent: Regarding C#.NET

Dan Neely5-Apr-06 8:17

Dan Neely

5-Apr-06 8:17

http://www.parashift.com/c++-faq-lite/how-to-post.html#faq-5.2

C# and standard C library

hung_ngole4-Apr-06 22:54

hung_ngole

4-Apr-06 22:54

I have a standard C library file : "abc.dll". Now I want to reuse it with C# (VS.NET 2005). How can I do this?
Thanks,
Hung.

Hung

Re: C# and standard C library

Judah Gabriel Himango5-Apr-06 4:20

Judah Gabriel Himango

5-Apr-06 4:20

Search for "pinvoke"; you can use Platform Invocation Services (P/Invoke) to call native exported C methods.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: How 'bout a little guitar now?
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

Re: C# and standard C library

russellsoft5-Apr-06 4:30

russellsoft

5-Apr-06 4:30

You must use InteropServices...

<br />
using System.Runtime.InteropServices<br />

then DllImport attribute

<br />
[DllImport("User32.dll")]<br />
public static extern int MessageBox(int h, string m, string c, int type);<br />

Then you are avaible to use MessageBox function

all code will be locking such the following:

<br />
using System;<br />
using System.Runtime.InteropServices;<br />
class MainClass <br />
{<br />
    [DllImport("User32.dll")]<br />
    public static extern int MessageBox(int h, string m, string c, int type);<br />
<br />
    static int Main() <br />
    {<br />
        string myString; <br />
        Console.Write("Enter your message: ");<br />
        myString = Console.ReadLine();<br />
        return MessageBox(0, myString, "My Message Box", 0);<br />
    }<br />
}<br />

Re: C# and standard C library

hung_ngole5-Apr-06 5:30

hung_ngole

5-Apr-06 5:30

Thanks!

But my "abc.dll" file is not registered in Windows, and I don't want to register it! Do you have other ideas?

Hung

Re: C# and standard C library

Dominik Reichl5-Apr-06 6:51

Dominik Reichl

5-Apr-06 6:51

Put it into the same directory where your .NET executable is.

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: C# and standard C library

hung_ngole5-Apr-06 16:10

hung_ngole

5-Apr-06 16:10

Can you explain more details!!
I tried to add reference to standard C .dll file but VS.NET does not allow me to do.
Thanks,

Hung

setup file

Mridang Agarwalla4-Apr-06 22:31

Mridang Agarwalla

4-Apr-06 22:31

i've created my c# application and now i want to setup file for it. The problem i'm facing is that my application requires some actions to be performed during setup such as:

copy E:\lib\myodbc3S.lib E:\\Windows\System32
copy E:\lib\myodbc3.dll E:\\Windows\System32
copy E:\lib\myodbc3.lib E:\\Windows\System32
copy E:\bin\myodbc3i.exe E:\\Windows\System32
copy E:\bin\myodbc3m.exe E:\\Windows\System32
copy E:\bin\myodbc3c.exe E:\\Windows\System32
copy E:\doc\*.hlp E:\\Windows\System32

and afyer this call a the regsvr32 command. How do I do this? I read something about an insatller class or something but i couldn't understand.

Update form after query

wistiti54-Apr-06 22:21

wistiti5

4-Apr-06 22:21

Hello,

I have problem with updating my form after I've executed an update or insert query.

How can I refresh my windows form in c#.

Thx

wistiti 5

Re: Update form after query

imsathy4-Apr-06 23:42

imsathy

4-Apr-06 23:42

no need to refresh the page to get updated.

for example:

f1() : write a function to display all the information on the page

f2(): write a separate function for doing modification and updating the database.

now u want the page to have the updated value to b displayed, for that wat u have to do is call the f1() process again..

sathy

Executing a batch file from C#

krishna194-Apr-06 21:49

krishna19

4-Apr-06 21:49

Hi,
I have a server database and multiple client databases.
We need to update client databases everytime server database is updated.
And we need to do it using .Net i.e through the application server.
We intend to use ftp for file transfer and windows services to schedule it.
We have a batch file(dos-script) which reads from the flat file and updates the local database.
I need some help regarding running the batch file from windows services(using C#).
Can you suggest any way to do it as i am completely clueless now....

Thanks in anticipation....

Re: Executing a batch file from C#

J4amieC4-Apr-06 22:22

J4amieC

4-Apr-06 22:22

Process.Start("yourbatchfile.bat");

PDF to SharePoint documentlibrary

dade20054-Apr-06 21:48

dade2005

4-Apr-06 21:48

who can tell me, how I can export a pdf-file to a SharePoint documentlibrary with C#?
I create with MS-Access a lot of turnoverlists every month. These lists are to be exported in differently documentlibraries.
I have a textfile with all pdf-files with name from link, name of documentlibrary and name from pdf-file (delimiter = ; ):
http://localhost;VB1;Dokumente;b:\CustVB1200603.pdf;"customer.pdf".
With C# I read the textfile and then...?

-- modified at 3:49 Wednesday 5th April, 2006

Problem in accessing values from IDataReader

MudkiSekhon4-Apr-06 21:19

MudkiSekhon

4-Apr-06 21:19

I am using Microsoft Patterns and Practices Enterprise Library Data Access Block. I have called a function which returns an object of type IDataReader. It has only single row in it.

I am writing this code

IDataReader dr =db.ExecuteReader(cmd);
string CityName = dr.GetValue(0).ToString();

On running this code I am getting the exception as

InvalidOperationException: Invalid attempt to read when no data is present.]
System.Data.SqlClient.SqlDataReader.PrepareRecord(Int32 i)
System.Data.SqlClient.SqlDataReader.GetValue(Int32 i)

But when I add two lines of code in it which has nothing to do with the running code, I don't get any exception. The code is as

IDataReader dr =db.ExecuteReader(cmd);
if (dr.Read()==true)//yaha kuch gadbad hai
{
int mkio =0;
}
string CityName = dr.GetValue(0).ToString();

Why this problem is happening and why it is not occuring when i add code which has nothing to do with the results.

Thanks,
Sandy

Re: Problem in accessing values from IDataReader

Vasudevan Deepak Kumar4-Apr-06 21:29

Vasudevan Deepak Kumar

4-Apr-06 21:29

You first need to ensure that there are values in the active row that is being accessed. dr.Read() ensures that.

Vasudevan Deepak Kumar
Personal Web: http://www.lavanyadeepak.tk/
I Blog At:
http://www.dotnetjunkies.com/weblog/deepak/
http://deepakvasudevan.blogspot.com/
http://deepak.blogdrive.com/

Re: Problem in accessing values from IDataReader

J4amieC4-Apr-06 21:42

J4amieC

4-Apr-06 21:42

When you first get an instance of IDataReader, its position is set before the first row. So any attempt to read a value will cause the error you saw.

The corrrect way to use a datareader with a single row is

if(dr.Read())<br />
{<br />
 // read values here<br />
}

or for a datareader with multiple rows

while(dr.Read())<br />
{<br />
  // read a row here<br />
}

the reason you stopped getting the error, is because you inadvertantly added a Read() command

Help me on MDI Parent form please

Bobby8874-Apr-06 21:07

Bobby887

4-Apr-06 21:07

When i put a control on a MDIParent form , every child form opens behind this control. Mad | :mad:

How can i handle this problem ?

Thank you in advanced.

STOP form_load

Cliffer4-Apr-06 21:06

Cliffer

4-Apr-06 21:06

hi,
i have to stop the load of my form when i catch an error,
i want to close the form.

but if i write:

try
{
...
}
catch
{
Close();
}

i get an error. because it's impossible to close form on load.
someone has any ideas? how can i stop the load?

thanks a lot. Cliffer

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