Re: Calling code from Win32 dll - C# Discussion Boards

Le centriste3-Apr-09 2:25

Le centriste

3-Apr-09 2:25

Don't bother, we will write the code and send it to you for free.

Ok, enough sarcasm. Here is where you start.[^]

Read that, get your hands on it. When you have issues or need more help on a particular area of the multithreading, post your question here.

King Julien3-Apr-09 2:26

3-Apr-09 2:26

Multithreaded Programming Using C#[^]

Multithreading Concepts in C#[^]

Please use the above links for best answers......

Have a Happy Coding.....

musefan3-Apr-09 3:08

musefan

3-Apr-09 3:08

see this[^] if you want the source code for it

Life goes very fast. Tomorrow, today is already yesterday.

#realJSOP3-Apr-09 4:49

#realJSOP

3-Apr-09 4:49

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J4amieC3-Apr-09 5:59

J4amieC

3-Apr-09 5:59

How can it be a bit urgent? Isnt that like being a bit pregnant?

Calling code from Win32 dll

Luc Pattyn3-Apr-09 6:56

Luc Pattyn

3-Apr-09 6:56

J4amieC wrote:
Isnt that like being a bit pregnant?

not at all. He wants an almost prompt delivery.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

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_AnsHUMAN_ 3-Apr-09 2:12

3-Apr-09 2:12

Hello Masters,
Can you just put some light on which is the best way to invoke function's from a Win32 dll?
I have already studied the following ways:
Solution A: Create Bridge Functions and Use PInvoke.
Solution B: Create a Bridge DLL in Managed C++. If we don’t have the source code for the dll’s this approach would be better.

Also do we need to write a wrapper for each and every function a WIN32 dll exposes?

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Giorgi Dalakishvili3-Apr-09 2:14

Giorgi Dalakishvili

3-Apr-09 2:14

If you are calling small amount of functions or performance is not very critical you can use P/Invoke approach. If performance is an issue, use managed c++

Giorgi Dalakishvili

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_AnsHUMAN_ 3-Apr-09 2:50

3-Apr-09 2:50

so you suggest to write a wrapper for the exposed functions from the dll in managed C++ before using them? I knowthat the number of functions in the C++ dll are more than what you would call manageable.

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Luc Pattyn3-Apr-09 2:46

Luc Pattyn

3-Apr-09 2:46

Hi,

I use P/Invoke to call native code. When I am in charge of the native code's API, I keep it as simple as possible, so not to rely on automatic marshaling which tends to cause data copying if one isn't careful.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

_AnsHUMAN_ 3-Apr-09 2:51

3-Apr-09 2:51

I don't have the API's code available as well. Not being a C# developer can you please make me understand what is automatic marshalling and how can it be implemented.

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Luc Pattyn3-Apr-09 2:56

Luc Pattyn

3-Apr-09 2:56

either do some research, or ask a specific question, or both.
calling Win32 API functions is handled rather well at this PInvoke site[^]

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

_AnsHUMAN_ 3-Apr-09 3:00

3-Apr-09 3:00

Thanks for your reply. Will prefer investigation Wink | ;)

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

MEB download Link! Help....

N a v a n e e t h3-Apr-09 4:29

N a v a n e e t h

3-Apr-09 4:29

_AnsHUMAN_ wrote:
Create a Bridge DLL in Managed C++. If we don’t have the source code for the dll’s this approach would be better.

You are using C++/CLI right? C++/CLI supports C++ Interop and it is more preferable than P/Invoke. So I think Solution B is going to be good.

_AnsHUMAN_ wrote:
Also do we need to write a wrapper for each and every function a WIN32 dll exposes?

I think, you only need to wrap functions that you use. Take a look at Nish's C++/CLI in Action, it covers these topics.

Smile | :)

Navaneeth

How to use google | Ask smart questions

Rajdeep.NET is BACK3-Apr-09 2:09

Rajdeep.NET is BACK

3-Apr-09 2:09

Hi Guys,

Can anyone give me the download link for Microsoft Expression Blend (MEB) and by the way, whats the size of the Setup?

Your help will be appreciated,
Rajdeep.NET Thumbs Up | :thumbsup:

Re: MEB download Link! Help....

Mirko19803-Apr-09 2:15

Mirko1980

3-Apr-09 2:15

You can dowload a 30-day trial here[^] (it's 200Mb big).
For the full version you have to pay 500$[^]

Help required in comparing an image file with a text file

ADIDADPU3-Apr-09 2:03

ADIDADPU

3-Apr-09 2:03

Friends,

I want to compare an image file which contains text with a text file.

Is it possible? If so, could you please help me in achieving the same.

Thank,
Snu

Re: Help required in comparing an image file with a text file

King Julien3-Apr-09 2:19

Re: Help required in comparing an image file with a text file

3-Apr-09 2:19

You mean a text in an image need to copmared with a string????

IF this is the case then you need to go for image recognition systems.....
(Not such an easy task as easy to say).....

Have a Happy Coding.....

mrithula86-Apr-09 3:37

Retrieving multiple items from listview

6-Apr-09 3:37

Hi I dont mean text in an image. I have a TableLayoutPanel and i have added label controls to the each cell of its 1st column.Also i have used a listview control to display the list of all files from a directory.For a design purpose, i want the name of the file to be displayed in the 1st label in the 1st cell of the table when i select any file name from the listview control.Similarly when the 2nd item from listview is selected it should appear in the 2nd label.

Currently i have a design which has a mapping like when i select on the 1st filename it appears in the 1st label,2nd file name in the 2nd label...the drawback that i face here is that suppose if by random i select 5th filename from listview it appears on the 5th label.

I hope im making myself clear.Please help me with this

mrithula83-Apr-09 1:23

3-Apr-09 1:23

Hi Can you please tel me how to retrieve multiple items from Listview?
If i use

ListView.SelectedListViewItemCollection sl = this.listView1.SelectedItems;
            lb4.Text = sl[0].Text;

The item that is selected first from the listview should be displayed in the 1st label added to the TableLayoutPanel.The next selected item from listview should be displayed in the 2nd label added to the Table.Can you please help me with this?

King Julien3-Apr-09 1:49

3-Apr-09 1:49

mrithula8 wrote:
ListView.SelectedListViewItemCollection sl = this.listView1.SelectedItems;
lb4.Text = sl[0].Text;

the above code itself will get you the list of selected items.

If you want to assign each selected item to each label, then create a control array of label and iterate through a for loop

like

for(int i= 0; i < sl.Count; i++)
{
Labelarray[i].Text = sl[i].text;
}

Have a Happy Coding.....

mrithula83-Apr-09 4:39

3-Apr-09 4:39

Hi I used the following code

foreach (ListViewItem ltv in listView1.SelectedItems)
            {
                lb4.Text = ltv.Text;

listView1.SelectedItems gets all the selected items from the listview.The first item that i select from the listview gets displayed in the lb4.I want the next selected item from the listview to get displayed in lb5.I believe that ltv contains the list of all selected items but i do not know how to add it to label.Can you tell me how to do this?

King Julien6-Apr-09 4:29

6-Apr-09 4:29

I think you have posted wrongly to some other thread i believe....

Have a Happy Coding.....

mrithula86-Apr-09 5:27

6-Apr-09 5:27

ya im sorry

mrithula86-Apr-09 5:28