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If you add it to a listbox as an item, it will try to find a string-representation of your object. The thing it is displaying means it is working, and correctly. If you want images TO the items, try the Listbox.ImageList. There's an example on MSDN.
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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You may get more helpful replies here if you describe what the bitmaps you want to display are ... are they icons; do they vary in size, etc. ?
Start here: [^] and figure out:
1. would using a ListView or DatagridView be a better choice
... if not ...
2. would the facility to use an 'ImageList with the ListView do what you want
... if not ...
3. are you willing to take on drawing the graphics yourself ... sub-classing the ListView and owner-drawing ... see: [^]
«Where is the Life we have lost in living? Where is the wisdom we have lost in knowledge? Where is the knowledge we have lost in information?» T. S. Elliot
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I have an event right:
private void dataGridView1_SelectionChanged (object sender, EventArgs e)
{
}
I would like to trigger an event when it is made:
private void dataGridView1_RowContextMenuStripNeeded (object sender, DataGridViewRowContextMenuStripNeededEventArgs e)
{
}
Simply that the RowContex event worked with SelectionChanged ...
I searched the Internet and these mean me on average: |
If you can, it can be an example of how to do it?
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It's not a good idea, or even really necessary.
Instead of messing about trying to force events to occur, put the code in your event handler inside a separate method and call it from both locations. That way, you don't need to "force" events to happen (which is rarely a good idea) and you reduce the code in your event handler which is a good idea from a style POV.
Sent from my Amstrad PC 1640
Never throw anything away, Griff
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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it can not be otherwise. I created a dynamic DGV fill and it does not support the RowContextMenuStripNeeded event and the SelectionChanged event as much as possible. I also wanted calling the SelectionChanged event to involve calling the RowContextMenuStripNeeded event. So how to do it? except that it is not a good idea, etc.
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Sure.
private void DoWork()
{
}
private void dataGridView1_SelectionChanged (object sender, EventArgs e)
{
DoWork();
}
private void dataGridView1_RowContextMenuStripNeeded (object sender, DataGridViewRowContextMenuStripNeededEventArgs e)
{
DoWork();
}
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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I tried it. But if I do as you write, this is the exception:
private void dataGridView1_RowContextMenuStripNeeded (object sender, DataGridViewRowContextMenuStripNeededEventArgs e)
{
e.ContextMenuStrip = contextMenuStrip1; <--- here: The object reference has not been set to the instance of the object
selectedrowindex = e.RowIndex;
}
Can you do something about it?
I also tried this:
private void dataGridView1_SelectionChanged (object sender, EventArgs e, DataGridViewRowContextMenuStripNeededEventArgs ee)
{
dataGridView1_RowContextMenuStripNeeded (sender, ee);
}
it can not be so ... because there is a mistake:
CS0123 error None of the overloads for the "dataGridView1_SelectionChanged" element match the "EventHandler" delegate.
Regarding the code from the deasinger:
this.dataGridView1.SelectionChanged + = new System.EventHandler (this.dataGridView1_SelectionChanged);
how to make it fit?
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Member 10975497 wrote: how to make it fit?
The e.ContextMenuStrip will be null if you call it by hand. It is set in code by the DGV that is calling the event. If you call it, you either must create your own DataGridViewRowContextMenuStripNeededEventArgs and fill it with the correct data, or find another way to determine which context-menu strip is meant.
Member 10975497 wrote: I also tried this:
That's not allowed, since both events have different signatures.
Try adding the menustrip-thing as a parameter in the DoWork method 
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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Trying the menustrip-thing as a parameter in the DoWork method Smile | :)
Could you show me how? Programming is not my strong side
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private ContextMenuStrip contextMenuStrip1;
public Form1()
{
InitializeComponent();
dataGridView1.RowContextMenuStripNeeded += dataGridView1_RowContextMenuStripNeeded;
dataGridView1.SelectionChanged += dataGridView1_SelectionChanged;
contextMenuStrip1 = new ContextMenuStrip();
contextMenuStrip1.Items.Add("The turtle moves.");
}
void dataGridView1_SelectionChanged(object sender, EventArgs e)
{
DoMyBidding(null);
}
void dataGridView1_RowContextMenuStripNeeded(object sender, DataGridViewRowContextMenuStripNeededEventArgs e)
{
e.ContextMenuStrip = contextMenuStrip1;
int selectedrowindex = e.RowIndex;
DoMyBidding(e.ContextMenuStrip);
}
void DoMyBidding(ContextMenuStrip humbly)
{
}
This is what Griff was explaining in sorts, before you stated it cannot be otherwise
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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Thanks
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You're welcome
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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Please, anyone, help to make this?
Give me the source code of this project.
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Member 14089822 wrote: Give me the source code of this project.
Give me, oh let's say, £400,000 and I'll do it.
This space for rent
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Member 14089822 wrote: Give me the source code of this project.
No. "Help to make project" is one thing, "source code of this project" is another altogether.
Two reasons:
1) We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action.
Try it yourself, or learn the Magic Words: "Do you want fries with that?"
If you meet a specific problem, then please ask about that and we will do our best to help. But we aren't going to do it all for you!
2) You do realise that your tutor is almost certainly well aware of this site - and others - and will detect very quickly that what you handed in was not your own work? Indeed, I know of several teachers who are regular visitors here ...
And there is a technical term for "handing something in when you didn't write it" - it's called "plagiarism".
Sent from my Amstrad PC 1640
Never throw anything away, Griff
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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Hi,
that is easy, just ask for a copy of your friend's home work[^] and adjust the wordings of the form titles and labels.
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I am working on a desktop software that I eventually hope to sell next year.
It's an end user application, not a business app. It will cost like $30, or free if you don't mind the built-in nagware on every save.
I plan to have my licensing follow the following algorithm:
1. First Run
a. find a UniqueID for this installation
b. ask the server to provide a license key for that UniqueID (providing relevant info)
c. save licence key as text file in application folder
2. Later Runs
a. Find the installation UniqueID
b. Match system UniqueID to licence key
My problem now is step a., how to Find Installation UniqueID?
Idea 1.
One of the best candidate so far is to get a hard drive unique ID
Searching for a reliable hardware ID
Now, as some critics said, you have to license again if you change the hard drive.
However I am not sure how one could avoid licensing again on a new hardware / system.
Idea 2
Why bother with hard drive number, simply store a GUID generated on install, or first check and store in the Windows Registry.
Pretty much the same as idea 1 practically, as far as user experience is concerned though.
Other Ideas
Any better licensing model to suggest? or key generation method?
[EDIT]
Found something interesting in StackOverflow:
c# - What is a good unique PC identifier? - Stack Overflow
Which I can get with the following snippet:
static void Main(string[] args)
{
var key = RegistryKey.OpenBaseKey(
RegistryHive.LocalMachine,
Environment.Is64BitOperatingSystem
? RegistryView.Registry64
: RegistryView.Registry32);
using (var reg = key.OpenSubKey("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion"))
{
var v = reg.GetValue("ProductId");
Console.WriteLine(v);
}
}
modified 13-Dec-18 9:35am.
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This is rather not a C# question. You are still deciding how to setup your license model. Decide that first and then implement.
I have some experience of this from my last employment where we sold licenses for an application. Several times I was asked from customers to handle crashed computers or new computers. We also had another application witch had a different license system, I prefer the later system instead of handling all by yourself. I will describe both systems.
The first system (handling all by yourself):
* We used a combination of the hard drive's ID and MAC-address to generate the ID.
* We told the customer to specify the ID and we then returned the license.
* When there was a crashed computer or the license needed a move to another computer. We sold them a "license move" with some discount. The customer had to specify both the old ID and the ID to get a new license. (This is a risk: Because the customer might be lying and actually the old computer still runs. Therefore you have sold one license for a cheaper price).
Don't store the license in the Window's registry! Store it somewhere else. Not there!
The second system (handling by a service-provider):
We used the service "Solo-server" from "softwarekey.com" which provided us with a database where we stored everything for the licenses. In our program we access the database to check the license for that customer. They supply with an online login to the database in any web browser and from there we created and handled all licenses for our customers.
When a customer bought the program we generated a new license with ID and password. After that we mailed the ID and password to the customer. The customer then "installs" the license on there computer. Our program connected to the provider's service and checked ID and password.
When a customer had a computer crash or needed to move the license. They uninstalled the license and installed it on the new computer. Same license (ID and password) but different computer. Of course we could deactivate a license for a customer anytime, and as soon as the program connected to the provider's system it deactivated the program.
I prefer this system many many times more then the first model. It was so much easier and better performance.
The only downside was when the customer didn't had internet access, which is required. But the provider had a solution for that by using another computer with internet access to create a file with the license. The "license-file" was then needed to be transferred to the computer by any means. That was the customer's problem  .
There is therefore a solution for offline handling. But if your customers can handle it online with internet access, it's a piece of cake.
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I don't think that key would exist on Win XP / Vista / 8: does that raise an issue ?
«Where is the Life we have lost in living? Where is the wisdom we have lost in knowledge? Where is the knowledge we have lost in information?» T. S. Elliot
modified 13-Dec-18 17:47pm.
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Thanks Bill! 
I was wondering about that exact same question!
Given that I only have access to Windows 10 machines I can't really answer it...
But... This StackOverflow post is from 2010, so this key must be quite prevalent on many editions of Windows!
But now that you put it explicitly out there, me think since my app is end user stuff and since (most likely?) Windows 10 is the most prevalent edition of Windows, or bound to be... I might just go with it...
Also I am thinking to use 2 IDs, this Windows one and that other one below (auto generated) so that should be fine!
My other custom ID code
public static Guid GetUniqueAppId()
{
var company = CoreServices.AssemblyCompany;
var product = CoreServices.AssemblyProduct;
var identifier = string.IsNullOrEmpty(company)
? $@"SOFTWARE\{product}"
: $@"SOFTWARE\{company}\{product}";
using (var key = Registry.CurrentUser.CreateSubKey(identifier))
{
var ID = "InstallId";
var value = key.GetValue(ID) as string;
if (string.IsNullOrWhiteSpace(value) || !Guid.TryParse(value, out var result))
{
result = Guid.NewGuid();
key.SetValue(ID, result.ToString());
}
return result;
}
}
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No matter how you do it, someone will complain.
I've got one bit of software that uses who-knows-what, but EVERY time Windows updates, I have to reauthorize the software. I've no idea what they're using, but they're WRONG.
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it's a cat ass trophee! 
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Hello guys ...(.wav) Format unCompressed Audio is Playing in My Project...but (.WAV) Format Compressed Audio is not Playing in My Project
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How do you expect us to be able to help you when we have no idea what you project does, how it does it, or even what it does when it doesn't work?
Remember that we can't see your screen, access your HDD, or read your mind - we only get exactly what you type to work with, and that there are probably thousands of different ways you could be trying to do this!
Please, stop trying to type as little as possible and provide information - help us to help you!
Sent from my Amstrad PC 1640
Never throw anything away, Griff
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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OriginalGriff wrote: How do you expect us to be able to help you when we have no idea what you project does, how it does it, or even what it does when it doesn't work?
As it looks... neither has he  
M.D.V.
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
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