Problem in accessing C# dll in VC 6.0 project - C# Discussion Boards

C# controls, .Net components. Help Desk Software

3-Feb-09 19:23

So, if I type in 'this is a stupid idea', you want to send 21 change messages ? Do you want to save you data 21 times ?

I would imagine the way to do this, is to set the Tag of the Textbox to contain the column and row, so you can parse it from there.

Christian Graus

Driven to the arms of OSX by Vista.

Re: DataGridView

CodingYoshi3-Feb-09 21:17

CodingYoshi

3-Feb-09 21:17

I actually did it by saving the column number and the row number at CellEnter.

Christian Graus wrote:
So, if I type in 'this is a stupid idea', you want to send 21 change messages ?

Yes.

Christian Graus wrote:
Do you want to save you data 21 times ?

No, just probe the object 21 times. For example,

private void textBox_TextChanged(Object sender, EventArgs e)
{
this.customer.Name = this.textBox.Text;
}

where customer is the object is I am probing.

CodingYoshi

Visual Basic is for basic people, C# is for sharp people. Farid Tarin '07

Re: DataGridView

MadArtSoft3-Feb-09 23:49

MadArtSoft

3-Feb-09 23:49

If you don't want to send 21 times message then you should think about how to catch your changes. One possibility is On leave event but you don't want do that. I think you should use on leave cell event.

How to naming a namespace in custom project?

calendarw3-Feb-09 18:24

calendarw

3-Feb-09 18:24

Hi,

I have already read some guideline for naming, but I want to know how to naming a namespace if the project is custom for other company?

Normally, the guideline prefer the following practice:
CompanyName.TechnologyName[.Feature][.Design]

But if I am working on CompanyA and its product is ProductA, I need to customize for CompanyB, which one is prefer?

CompanyB.ProductA or
CompanyA.ProductA.CompanyB or
any suggestion?

Thanks.

Re: How to naming a namespace in custom project?

Christian Graus3-Feb-09 19:17

Re: How to naming a namespace in custom project?

3-Feb-09 19:17

Whatever you like, I mean, it;s all going to work, right ?

I can't imagine that companyB wants to see CompanyA in their project tho.

Christian Graus

Driven to the arms of OSX by Vista.

calendarw3-Feb-09 20:00

calendarw

3-Feb-09 20:00

but if CompanyA is software house, CompanyB is the client and will not see that namespace, is it a good practice to keep CompanyB in the namespace to indicate the customized project is for CompanyB?

Problem in accessing C# dll in VC 6.0 project

raesa3-Feb-09 18:14

raesa

3-Feb-09 18:14

Hi, i have a small problem i have a csharp dll built in VS2005.I have to access the functions from this dll in my VC++ project done in VC 6.0.My VC project is not able to identify my C# namespace and class.I dont get what the problem is. Please do have a look at my c# code and VC Project code and do let me know if im making some mistake.I have also pasted the errors that i am getting. please do help me...i'm not able to understand the problem. Frown | :(

C# code:

using System;
using System.Collections.Generic;
using System.Text;
namespace TestDllCsharp
{
public class Class1
{
public void PrintMessage ()
{
System.Windows.Forms.MessageBox.Show("Test");
}
}
}

VC Project :
#import "TestDllCsharp.tlb"
using namespace TestDllCsharp;
#include <stdio.h>
void main()
{
HRESULT hresult;
CLSID clsid;
CoInitialize(NULL);
hresult=CLSIDFromProgID(OLESTR("TestDllCsharp.Class1"),&clsid);
if (hresult == 0)
{
_Class1 *t;
hresult=CoCreateInstance(clsid,NULL,CLSCTX_INPROC_SERVER,__uuidof(_Class1),(LPVOID *) &t);
t->PrintMessage ();
CoUninitialize();
}
}

I get errors like :
error C2065: '_Class1' : undeclared identifier
error C2065: 't' : undeclared identifier

Thnx in advance.

Re: Problem in accessing C# dll in VC 6.0 project

Christian Graus3-Feb-09 19:19

Re: Problem in accessing C# dll in VC 6.0 project

3-Feb-09 19:19

I assume the tlb means you've created a COM dll. Have you tried specifying the GUID directly, instead of using the smart pointer stuff ? Also, why are you sure the class name gets a _ put in front of it in VC ?

You'd do better to upgrade to a less crap version of C++, and then you can just use managed C++ as your bridge.

Christian Graus

Driven to the arms of OSX by Vista.

raesa3-Feb-09 21:25

raesa

3-Feb-09 21:25

My project requirement is that i have to use VC 6.0
Is there a way to solve this problem?I just dont undertsand why the code isn't able to identify my classes.Is there a problem with my tlb file generation.Please do tell me if there is a solution to this ?

Thnk you ...

### Problem with referenced assembly ? [modified]

bug_aonz3-Feb-09 17:55

bug_aonz

3-Feb-09 17:55

I need to build win app project with reference to a library i created. The structure of the output folder i need is something like this.

bin\Debug
>>|
>>|--app.exe
>>|
>>|-- Lib(folder stored library)
>>>>|
>>>>|-- myLib.dll

Rudimentary, after we build a win app project(an exe file), an exe file can run along with a referenced dll located at the same place as an exe file.
But i need to store dll file in Lib folder like the picture above.

Could you elarborate how to do something like this in C#.NET 2008?

thank in advance
AonzZung

modified on Wednesday, February 4, 2009 1:23 AM

Re: ### Problem with referenced assembly ?

Rob Philpott3-Feb-09 23:50

Rob Philpott

3-Feb-09 23:50

There's a few ways of doing this.

The nasty way would be to create a new AppDomain in your application and point its base path to your subfolder. You'd end up with marshalling nightmares doing that though.

The simple bodge would be to copy the files from the lib folder into your app's base folder.

Another way would be to dynamically load the dll with Assembly.Load. You can then instantiate the types it contains with the Activator class. Where this runs into difficulties is where your lib assembly references other assemblies. That resolution would not be done for you and you'd have to do it manually. If it only references assemblies in your app's base folder this isn't a problem.

Regards,
Rob Philpott.

Calling Child Form through MDI form

sjs4u3-Feb-09 17:52

sjs4u

3-Feb-09 17:52

hi,

I am having MDI form in my Project. I am calling child form through the below code. It's working fine.

Feedback childForm = new Feedback();
childForm.MdiParent = this;
childForm.Show();

But when I set background image on MDI form. It will not display the child form.

How can I do?

Thanks
sjs

Re: Calling Child Form through MDI form

Dave Kreskowiak3-Feb-09 18:25

Dave Kreskowiak

3-Feb-09 18:25

You should not be seeing the background image on the MDI Parent at all since the background image is being shown behind the Parent's MDIClient area that handles the MDIChild forms.

You have to search through the Parent's Controls collection and find the MDIClient control, then set its BackgroundImage property. I'm not entirely sure it will work, but it's worth a shot.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

how to maintain the same order in a treeview control where the nodes comes from other treeview. [modified]

Gonxh Aniket3-Feb-09 17:41

Gonxh Aniket

3-Feb-09 17:41

Hi,

In my windows application, I have 2 treeview controls, say trvw1 and trvw2. I populate trvw1 from XML file. Selected nodes will be shifted to trvw2. When I select node1 after selecting node3 trvw2 appears as below.

trvw1 trvw2
------ ------
node1 node3
node11 node31
node12 node32
node2 node1
node21 node11
node3 node12
node31
node32

But in trvw2, node1 should appear above the node3 as it appears in the trvw1. The order of nodes should not get disturbed in trvw2 .
Could you help me to solve this problem. Thanks in advance..

modified on Wednesday, February 4, 2009 12:34 AM

Re: how to maintain the same order in a treeview control where the nodes comes from other treeview.

MartyExodus3-Feb-09 19:18

3-Feb-09 19:18

Well, a horribly inefficient, but likewise easy method would be to use a BubbleSort, referring back to original TreeNode.

bool done = false;
int length = trvw2.Nodes.Count;

while(!done)
{
    done = true;
    for(int i = 1; i<length;>    {
        if(trvw1.Nodes.IndexOf(trvw2.Nodes[i])<trvw1.Nodes.IndexOf(trvw2.Nodes[i-1]))
        {
            done = false;
            //INSERT NODE SWAP CODE
        }
    }
}

I would include the "NODE SWAP CODE," but I'm not anywhere that I can check syntax, so yeah.

Sorry if it doesn't work or if there are small errors - I'm working entirely off of memory.

EDIT: Fixed typos.

There is no knowledge that is not power. - Mortal Kombat

Audio Input Class?

MartyExodus3-Feb-09 17:03

3-Feb-09 17:03

I'm working on a project for my Comp Sci class, so I figured I'd make a homebrew version of rock band/guitar hero, except with real instruments.

I was wondering if there is a way to capture the audio input in a stream, and then if there was a way to check the pitch of a particular point of that input stream.

Any help would be appreciated. Thanks.

There is no knowledge that is not power. - Mortal Kombat

Christian Graus3-Feb-09 17:44

3-Feb-09 17:44

Rock Band and Guitar Hero do not support real instruments.

You can capture the input, but I'm not sure how hard it is to work out a pitch, especially if it's a guitar, which can have vibrato, bent strings, whammy bar, etc.

Christian Graus

Driven to the arms of OSX by Vista.

MartyExodus3-Feb-09 17:52

3-Feb-09 17:52

Even capturing the input would be a good enough start from where I'm at.

I imagine I can learn how to manipulate the captured audio on my own - something about FFTs, I was reading. Makes me wanna play FF Tactics. Big Grin | :-D

Is there any way I could convince you to post a link or snippet showing how to capture the audio?

There is no knowledge that is not power. - Mortal Kombat

Christian Graus3-Feb-09 19:21

3-Feb-09 19:21

My first google hit was a code project article:

http://www.codeproject.com/KB/audio-video/cswavrec.aspx[^]

Christian Graus

Driven to the arms of OSX by Vista.

MartyExodus6-Feb-09 13:42