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Take ownership from trustedinstaller to administrator c# or vb

3-Dec-20 22:20

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Member 123929042-Dec-20 10:49

Member 12392904

2-Dec-20 10:49

how will I take ownership in registry subkey... from other owner(TrustedInstaller) to Administrator's.

Re: Take ownership from trustedinstaller to administrator c# or vb

Dave Kreskowiak2-Dec-20 18:21

Dave Kreskowiak

2-Dec-20 18:21

Google for "C# take ownership of registry key" for examples and start reading.

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Dave Kreskowiak

Combine Array Values in C#

Member 130810652-Dec-20 3:51

Member 13081065

2-Dec-20 3:51

I have an array of string which is 

    string[] myarr = new[] { "a", "b", "c" };

Can you please help me how to get this result?

    a
    ab
    abc

I tried this one but I just don't know how to get the value from the array and add it on my list 

    string[] myarray = new string[] { "a", "b", "c" };
                List<string> resultarray = new List<string>();

                int i, j;
                for (i = 0; i <= myarray.Length; i++)
                {
                    for (j = i; j <= i; j++)
                    {

                        


                    }
                }

Richard MacCutchan2-Dec-20 4:02

Richard MacCutchan

2-Dec-20 4:02

A simple loop: print the first character, print the first and the second, ...

Richard Deeming2-Dec-20 4:08

Richard Deeming

2-Dec-20 4:08

Member 13081065 wrote:
C#
for (j = i; j <= i; j++)

What values do you think j is going to take within that loop?

Try debugging your code and stepping through the loops. Do the values you see in the debugger match what you were expecting?

NB: You don't need an inner loop at all. String.Join[^] has an overload which lets you specify the range of elements from the array that you want to join. For example:

string[] input = { "0", "1", "2", "3" };
string output = string.Join(string.Empty, input, 0, 3);
// Output === "012"

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

OriginalGriff2-Dec-20 4:31

2-Dec-20 4:31

You get a value from an array by using an index - a numeric value that ruins from 0 to (N - 1), where N is the number of elements in the array. So valid indexes for your myarr array woudl be 0, 1, and 2.
If you want "a", then you use myarr[0]
If you want "b", then you use myarr[1]
If you want "c", then you use myarr[2]

That index value can be in a variable:

int index = 2;
Console.WriteLine(myarr[index]);

Would print "c" for example.

Think about what your tutor wants you do to, and work out how you would do it manually - that may help you work out what your code needs to do!

Give it a try - this isn't complicated!

Hint: you only need one loop!

Unity connection with a smartwatch and getting heart rate data

Gerry Schmitz2-Dec-20 5:33

Gerry Schmitz

2-Dec-20 5:33

string[] myarr = new[] { "a", "b", "c" };

string s = string.Join( "", myarr);

for ( int i = 1; i <= s.length; i++ ) {
   Console.Writeline( s.Substring( 0, i ) );
}

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

SkyVenus30-Nov-20 23:30

SkyVenus

30-Nov-20 23:30

Hello, I am working on a project where I have to make connections with a smartwatch (Samsung gear s3) and a Unity application, then use the heart rate data in the Unity app. Any help is appreciated since I am experiencing problems making it work. Thank you in advance! ^^

Re: Unity connection with a smartwatch and getting heart rate data

Sandeep Mewara1-Dec-20 0:06

Sandeep Mewara

1-Dec-20 0:06

I see there are published articles on how to do it. Couple of them:
Use Tizen Web To Measure Heart Rate With Galaxy Watches | Samsung Developers
Unity and Samsung Gear S2/S3 – The NUDev Blog

Would suggest to try them. Resopnse to specific queries related to thrid party SDK that helps in reading data would be faster in the related forums. You can surely post here too if someone can help/has experience on them. Though, please be specific and share details of what problem you experience and the effort made. Thumbs Up | :thumbsup:

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Re: Unity connection with a smartwatch and getting heart rate data

SkyVenus1-Dec-20 3:11

SkyVenus

1-Dec-20 3:11

Well the problem is that I have never worked before with creating connections of such kind and I don't even know where to begin with. I am currently looking for a client that could establish these connections but still do not know how...

Re: Unity connection with a smartwatch and getting heart rate data

Gerry Schmitz1-Dec-20 5:34

Gerry Schmitz

1-Dec-20 5:34

My wallet is empty ... can you put some money in it? I'm having problems filling it.

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Re: Unity connection with a smartwatch and getting heart rate data

OriginalGriff1-Dec-20 9:30

Re: Unity connection with a smartwatch and getting heart rate data

1-Dec-20 9:30

I suspect that one will make a loud whooshing noise as it flies quickly above him ... Sigh | :sigh:

Gerry Schmitz1-Dec-20 18:23

Gerry Schmitz

1-Dec-20 18:23

I'm trying to get into their zone ... the twilight zone.

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Differences

michaelbarb30-Nov-20 5:53

michaelbarb

30-Nov-20 5:53

What is the difference between Show/Hide or Visible/Hidden"? I have some windows I need to keep running in the background. Searching for something yesterday I came accost a comment that said that Show/Hide are obsolete in a Wpf and I should be using the other. I cannot really find a difference except that Visible/Hidden has an event you can tie to the change.

So many years of programming I have forgotten more languages than I know.

Re: Differences

OriginalGriff30-Nov-20 6:20

Is my program idea possible?

30-Nov-20 6:20

If this is a WPF question, then it should be asked in the appropriate forum: Silverlight / WPF Discussion Boards[^] - this is a "Generic C#" forum.

Re: Differences

michaelbarb30-Nov-20 6:39

michaelbarb

30-Nov-20 6:39

I reposted it under the forum you suggested. I almost put it there in the first place but some references showed it was part of C#.

So many years of programming I have forgotten more languages than I know.

Dioxazine27-Nov-20 20:09

Dioxazine

27-Nov-20 20:09

I have an idea for a program using the picture viewer control. I would like to have a label at the top of the form that says "Choose a photo of the musicians listed below to see a photo."

Then below that I would make four option buttons. And next to each option button put a musician's name.

Then below that on the bottom have two buttons. One buttons says "Show photo." The other button says "Clear image."

Problem is all the Youtube videos I've seen that demonstrate the picture box have you using open file dialog and it looks like you have to manually browse into the folder on your drive to select the photo.

I don't want to do that. I want my program to be automatic. No browsing for a photo. You select an option and then hit the button "Show photo" and the program shows the photo in the viewer.

But I don't know if this is possible so let me know please.

OriginalGriff27-Nov-20 20:20

27-Nov-20 20:20

Yes, it's possible: you do not need to use a OpenFileDialog to access the image, that just provides you with a path to the file.

If you want to load the file from a specific location, then you can just specify that:

byte[] data = File.ReadAllBytes(@"D:\Temp\MyImage.bmp");
MemoryStream ms = new MemoryStream(data);
Image im = Image.FromStream(ms);

Or you can load from the application EXE folder:

byte[] data = File.ReadAllBytes(@".\MyImage.bmp");
MemoryStream ms = new MemoryStream(data);
Image im = Image.FromStream(ms);

This has disadvantages in that you can't modify the image reliably as the folder is likely to be read only in production.
Or you can add the image as a resource and embed it in your application:

Image im = Properties.Resources.MyImage;

And now you can't change the image from run to run of your app at all because it is part of your application EXE file.

Dioxazine28-Nov-20 5:54

Dioxazine

28-Nov-20 5:54

Thanks. But I wish I understood what those lines of code mean. The only thing I understand is where you added the path to the image. That makes sense. But byte[] data and File.ReadAllBytes I don't know the why of that.

And I don't know what MemoryStream ms is either.

If you could perhaps explain what these lines do I would appreciate it.

OriginalGriff28-Nov-20 6:17

28-Nov-20 6:17

Oh come on! Are you trying to run before you can walk? This is pretty basic stuff!

You know what a byte[] is, don't you? It's an array of bytes, is all. So what do you think that File.ReadAllBytes does? And if you don't understand what a function does, look it up in the official documentation: File.ReadAllBytes(String) Method (System.IO) | Microsoft Docs[^]

The next two are there for a specific reason: while you can load an image directly from a file, that locks the file until the image is Disposed - so if you want to write a modified version back to the file in your app, you can't. Converting the data to a Stream gets round that, by locking the Stream instead of the file. And if you don't understand what a Stream is then how on earth are you doing any file input / output? Laugh | :laugh:

So those three lines do this:
1) Read the disk-based image file into an array of bytes.
2) Construct a memory-based Stream from the array.
3) Create an Image from the Stream.

Seriously, if you don't understand stuff like this, then you need to re-read your course notes from the beginning, because you have missed a heck of a lot of useful stuff!

Dioxazine28-Nov-20 8:09

Dioxazine

28-Nov-20 8:09

Come on now. I only program as a hobby. I've only done console programs so far. There is a lot of stuff I have not done. You programmers need to have some more understanding of what it's like not to be a full time developer.

If you came to me for guitar lessons I too could slice you to ribbons for all that you don't know. But that is a very poor way of teaching guitar.

Why would I need a byte array anyway. Just load the photo into the viewer. My photos will not be changing.

OriginalGriff28-Nov-20 8:22

28-Nov-20 8:22

Dioxazine wrote:
If you came to me for guitar lessons I too could slice you to ribbons for all that you don't know.

Yes, because I know nothing.

Dioxazine wrote:
But that is a very poor way of teaching guitar.

And so is what you are doing.

Suppose I came to you for help with my guitar playing, and told you that I was learning on my own by guessing what to do and wondering why I can't play as fast as others - but the forks and spoons I jam under the frets to select the notes to strum take me too long to pull out and move?

Clearly, I don't know enough to play the guitar because I've spent so long guessing what to do instead of sitting down and actually learning the right way!

And that's where you are with development. You've found code that does some of what you want, but you don't understand how it works - or even exactly what it is doing - so you can't change it to do something else yourself. And for the same reasons as me with my guitar spoons - they work for me, but not very well - I need to be taken back to the beginning and learn how to play in a structured way that introduces chords and so on in a logical progression.

Seriously, even as a hobby this is a complicated subject and it really benefits from learning the basics thoroughly before you try to rush ahead to "more interesting" projects.