C# Discussion Boards - CodeProject

Re: When is goto acceptable?

7-Jan-09 6:20

IMHO, Goto is only acceptable during the next Ice Age and every 3rd Ice Age thereafter.

Seriously, I haven't used one in over 8 years, and don't plan on doing so anytime soon. If your app, data model, algorithm, ..., is designed correctly, you shouldn't need one.

Dewald wrote:
Could anyone give me examples of where you would be willing to use the goto statement?

Have you ever seen the little window stickers of the kid peeing on some company logo?? Put the Goto in place of the logo...

A guide to posting questions on CodeProject[^]

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

Guffa7-Jan-09 6:24

Guffa

7-Jan-09 6:24

Dave Kreskowiak wrote:
Have you ever seen the little window stickers of the kid peeing on some company logo?? Put the Goto in place of the logo...

Ok, that is definitely an acceptable use of goto. Smile | :)

Despite everything, the person most likely to be fooling you next is yourself.

Creating Interops

satsumatable7-Jan-09 3:28

satsumatable

7-Jan-09 3:28

Hi
I've a DLL that basically refers 2 another .Net DLLs, with the given situation is it possible for us to create only one TLB file using (TLBEXP.EXE) with all dependencies?

Thanks in advance ...

Dave Kreskowiak7-Jan-09 5:59

7-Jan-09 5:59

Are you asking if it's possible to get all three .DLL's in the same TLB? No, it's not. AT least, I've never heard of a tool that will do this.

A guide to posting questions on CodeProject[^]

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

satsumatable7-Jan-09 17:44

satsumatable

7-Jan-09 17:44

Thanks for your reply.

So what is the option to build one CCW setup that should actually expose all DLLs?

Dave Kreskowiak8-Jan-09 1:37

8-Jan-09 1:37

Why do you have to have one?

AFAIK, there isn't an option.

A guide to posting questions on CodeProject[^]

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

satsumatable9-Jan-09 0:48

satsumatable

9-Jan-09 0:48

OK, i think if i explain my situation you can suggest me.

I've an application (.Net C#) and i want to give an interface to COM based users, for this i need to ship all APIs (like say i've 10 DLLs). I just dont want to build 10 different TLB file and register them separately at client machines.

Want to build one wrapper class that will expose all other DLLs, this is what i want to achieve. How can i get it done?

Thanks in advance.

Dave Kreskowiak9-Jan-09 1:52

image arrangment on canvas

9-Jan-09 1:52

satsumatable wrote:
Want to build one wrapper class that will expose all other DLLs

You just said it, right there. Build a COM-based wrapper class. All those .DLL's are still going to have to be registered though...

A guide to posting questions on CodeProject[^]

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

yogesh_deshmukh7-Jan-09 2:57

Re: image arrangment on canvas

7-Jan-09 2:57

how to arrange images on canvas to form collage with each image different angle and important part of image should be visible and no blank space

Eddy Vluggen7-Jan-09 4:38

about saliency extraction

7-Jan-09 4:38

Use Paint Shop Pro, make the collage as a bitmap and set this as the background of the form?

I are troll Smile | :)

yogesh_deshmukh7-Jan-09 2:51

7-Jan-09 2:51

how to select salient part of image ,salient means important part for which we taken out photograph, no matter what is background ,floor,sky...

Eddy Vluggen7-Jan-09 4:41

7-Jan-09 4:41

There are no standard-functions to do this in .NET that I'm aware of, I'm afraid you'll have to roll your own.

You're baking a photographers-paintprogram?

I are troll Smile | :)

yogesh_deshmukh7-Jan-09 19:39

7-Jan-09 19:39

actualy we r making image collage project which will show salient part of images and so is there any way by using intensity,saturation,hue of pixels we able extract that part

Eddy Vluggen8-Jan-09 0:24

8-Jan-09 0:24

This class can serve as an example on manipulating colors. Or, you can take a look at MSDN, and take a look at the GetSaturation method of the Color-class.

You got a though project on your hands there.. If I understand you correctly, you'll have to iterate through all the pixels, and judge them based on hue/intensity/color/something?

I are troll Smile | :)

yogesh_deshmukh9-Jan-09 2:05

9-Jan-09 2:05

Yes,now we r just considering pixels intensity factor,but problem with that is time required for two for loop quit large for getpixel(),setpixel() fun so is there other method so that we can increase speed of execution?

Eddy Vluggen9-Jan-09 2:18

9-Jan-09 2:18

Have you considered Parallel.For? Personally I prefer the AForge version, as it only requires .NET 2.0. It's quite an improvement in execution-time if you got a dual-core (or better) processor Smile | :)

Just noticed that the author is also doing a lot of image-manipulation.

I are troll Smile | :)

yogesh_deshmukh9-Jan-09 19:37

9-Jan-09 19:37

Thanks, we will implement it

yogesh_deshmukh16-Jan-09 20:32

16-Jan-09 20:32

i implemented parallel for loop but in below code it is throwing exception 'invalid operation for gepixel and setpixel' is it possible to use gepixel() in this context please help!!
AForge.Parallel.For(py1, py2, delegate(int z)
{
for (x = px1; x < px2; x++)
{
Color pixelColor = image2.GetPixel(x, z);
img1.SetPixel(x, z, pixelColor);
}
});

Eddy Vluggen18-Jan-09 2:34

Display numbers in HEX - DataGridView?

18-Jan-09 2:34

The AForge-framework provides an abstraction with it's Parallel.For, from threads. The framework actually generates some threads on the background, to execute the For-loop. Hence, the same rules apply to threading; you're not allowed to access variables from other threads.

See the BackgroundWorker class for more details on these limitations.

I are troll Smile | :)

liqnit7-Jan-09 2:46

liqnit

7-Jan-09 2:46

Hi I am using VS2008 C# with datagridview and filling the cells using a byte[].

Is there a away the cells will display the value in HEX ?
Thanks

Have a nice Day

DaveyM697-Jan-09 2:58

DaveyM69

7-Jan-09 2:58

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

liqnit7-Jan-09 3:30

liqnit

7-Jan-09 3:30

thanks a lot .
Maybe i am missing somthing is therea way of not converting to string and display the value as Hex
Thanks

Have a nice Day

DaveyM697-Jan-09 3:46

DaveyM69

7-Jan-09 3:46

A simple method like this should do it:

public string ToHexstring(byte[] byteArray)
{
    if (byteArray.Length > 0)
    {
        StringBuilder resultBuilder = new StringBuilder();
        foreach (byte value in byteArray)
            resultBuilder.Append(value.ToString("X2"));
        return resultBuilder.ToString();
    }
    else
        return "00";
}

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

Dave Kreskowiak7-Jan-09 5:57