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Hello everyone,
I am actually trying to create or generate automatically struct using the class "TypeBuilder".
I have already found a solution to create an "enum".
Here is the Code that I found as example on the microsoft-page:
using System.Reflection;
using System.Reflection.Emit;
namespace IoddParser
{
class test{
public void CreateEnum()
{
AppDomain currentDomain = AppDomain.CurrentDomain;
AssemblyName aName = new AssemblyName("TempAssembly");
AssemblyBuilder ab = currentDomain.DefineDynamicAssembly(
aName, AssemblyBuilderAccess.RunAndSave);
ModuleBuilder mb = ab.DefineDynamicModule(aName.Name, aName.Name + ".dll");
EnumBuilder eb = mb.DefineEnum("Elevation", TypeAttributes.Public, typeof(int));
eb.DefineLiteral("Low", 0);
eb.DefineLiteral("High", 1);
Type finished = eb.CreateType();
ab.Save(aName.Name + ".dll");
foreach(object o in Enum.GetValues(finished) )
{
Console.WriteLine("{0}.{1} = {2}", finished, o, ((int) o));
}
}
How can I do the same procedure to get a struct (NOT A CLASS  )
Thank you.
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Because of the constraints that make using instances of run-time defined Types difficult, I'd recommend you look at an alternative like System.Dynamic ExpandoObject.
You create a Struct on-the-fly: any instance of it is going to be boxed, and right there you may have lost the potential benefits of using a Struct.
The few cases I've seen that needed to cook up some run-time bag of mixed Types could all be handled using System.Dynamic (or, even the now deprecated 'ArrayList).
Rick Strahl has done some very interesting work with ExpandoObject that I think could be relevant to your concerns: [^].
Describe your use case in detail, maybe you'll get more specific feedback.
«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 1-Aug-19 14:45pm.
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BillWoodruff wrote: or, even the now deprecated ArrayList
I'm not sure you'd ever need to use ArrayList, when you could just use List<object> instead. 
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Amen ! Wish I could say I was thinking of those doomed to use .NET pre-Linq, but I wasn't 
«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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The problem is that when the code runs in the design view, the current directory is the Visual Studio application directory, not your project's directory. The file C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\Common7\IDE\google.png doesn't exist, so the Bitmap constructor throws an exception.
You can use the DesignMode property[^] to test whether your control is in design mode. You should probably also check that the file hasn't been deleted:
Image img;
public tab()
{
InitializeComponent();
if (!DesignMode && File.Exists("google.png"))
{
img = new Bitmap("google.png");
}
}
private void tab_Paint(object sender, PaintEventArgs e)
{
if (img != null)
{
e.Graphics.DrawImage(img, rect);
}
} You should be able to adapt the code from this SO answer[^] to resolve the image path at design time, if you need to see the image in the designer:
private string ResolveImagePath()
{
string path = "google.png";
if (DesignMode)
{
var typeResolver = (ITypeResolutionService)GetService(typeof(ITypeResolutionService));
if (typeResolver != null)
{
AssemblyName name = System.Reflection.Assembly.GetExecutingAssembly().GetName();
string basePath = typeResolver.GetPathOfAssembly(name);
path = Path.Combine(basePath, path);
}
}
return path;
}
public tab()
{
InitializeComponent();
string imagePath = ResolveImagePath();
if (File.Exists(imagePath))
{
img = new Bitmap(imagePath);
}
}
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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___The bug is thrown at the initialization of the image. As you can see in the code below:
public tab()
{
InitializeComponent();
}
Image img = new Bitmap(@"google.png");
Rectangle rect = new Rectangle(5, 5, 22, 22);
private void tab_Paint(object sender, PaintEventArgs e)
{
e.Graphics.DrawImage(img, rect);
}
___ NEXT, i initialize it in the constructor, following your helping code like this:
public partial class tab : UserControl
{
public tab()
{
InitializeComponent();
if (!DesignMode && File.Exists("google.png"))
{
img = new Bitmap("google.png");
}
}
Image img;
Rectangle rect = new Rectangle(5, 5, 22, 22);
private void tab_Paint(object sender, PaintEventArgs e)
{
e.Graphics.DrawImage(img, rect);
}
but another Error appear:
https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/f/281c49f0-e874-4b83-bff6-9bc6b8526d42/ddctlq3-8c112b8d-5685-4a43-a96e-21046443ef9a.jpg?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1cm46YXBwOjdlMGQxODg5ODIyNjQzNzNhNWYwZDQxNWVhMGQyNmUwIiwiaXNzIjoidXJuOmFwcDo3ZTBkMTg4OTgyMjY0MzczYTVmMGQ0MTVlYTBkMjZlMCIsIm9iaiI6W1t7InBhdGgiOiJcL2ZcLzI4MWM0OWYwLWU4NzQtNGI4My1iZmY2LTliYzZiODUyNmQ0MlwvZGRjdGxxMy04YzExMmI4ZC01Njg1LTRhNDMtYTk2ZS0yMTA0NjQ0M2VmOWEuanBnIn1dXSwiYXVkIjpbInVybjpzZXJ2aWNlOmZpbGUuZG93bmxvYWQiXX0.1fkgpeEVDKRy30I70lftNt0WfbpoFl8LACty1N_fzsc[^]
Now what?
_ Your '!DesignMode' solution, is really nice and i didnt know it at all !
Awesome so far.
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_Q12_ wrote: another Error appear
You missed the update to the tab_Paint event handler:
private void tab_Paint(object sender, PaintEventArgs e)
{
if (img != null)
{
e.Graphics.DrawImage(img, rect);
}
}
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Thank you for all your help - you really inspired me.
It was a very very old problem and now you 'confirmed' it to me. Thats why im so thankful. And pointing that was more a design issue and not a compile issue, cemented it for me.
 
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Are you sure the root is correct?
What i did: I created a new alb.jpg file into (your specified folder root):
"c:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE
and the code now checks if in 'DesignMode', then load the default alb.jpg image.
Else, is runtime and load the normal image.
here is my code:
public tab()
{
InitializeComponent();
string alb = @"c:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\alb.jpg";
if (DesignMode==true)
{
img = new Bitmap(alb);
}
else
{
img = new Bitmap("google.png");
}
}
Image img;
Rectangle rect = new Rectangle(5, 5, 22, 22);
private void tab_Paint(object sender, PaintEventArgs e)
{
e.Graphics.DrawImage(img, rect);
}
string mytext;
public string tab_Text
{
get { return mytext; }
set
{
label1.Text = mytext = value;
}
}
I get the same error as the first time, not finding the png file.
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I find another solution but all thanks to your support, so many many thanks - it really helped me !!!
control code:
public tab()
{
InitializeComponent();
}
Image img;
Rectangle rect = new Rectangle(3, 3, 22, 22);
private void tab_Paint(object sender, PaintEventArgs e)
{
if (img!=null)
{
e.Graphics.DrawImage(img, rect);
}
else
{
e.Graphics.FillRectangle(new SolidBrush(Color.Black), rect);
}
}
public Image tab_Image
{
get { return img; }
set
{
img = value;
}
}
and in design mode i set the property for image. And the image is seen in the design mode this way with no apparent errors. I will see in time how good solution is this one.
.
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On top of what Richard said, for custom controls where you have images that don't change and are a mandatory part of your control, you should probably move the images to Resources instead of leaving them in files. You can then load the image from your controls Resource and you won't have any problems with managing files on the drive.
Load image from resources area of project in C# - Stack Overflow[^]
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Hello,
We faced a the remote share folder issues using the C#.
1. We used C# to build up a windows service to copy the file to the remote share folder.
2. There is a AD domain account which can be accessed to the share folder: \\server\path which on a remote server.
Issues:
If the server was be reboot, we will got the error when the Windows service tried to access to the share folder \\server\path on remote server.
But if I sign to Windows with the AD domain account and re-open the remote share folder using the authorized account without any password. Then the Windows service can access to the remote share folder.
So, is there any way to use the C# to access without sign in to Windows?
Thanks,
Jowvid.
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Create a service account that the windows service runs as.
Service Accounts (Windows 10) | Microsoft Docs[^]
".45 ACP - because shooting twice is just silly" - JSOP, 2010
-----
You can never have too much ammo - unless you're swimming, or on fire. - JSOP, 2010
-----
When you pry the gun from my cold dead hands, be careful - the barrel will be very hot. - JSOP, 2013
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I designed a CBT questions and answer using c# I have connected to the database using my sqlconne,but I don't know where to begin to start the code so the app can. Run or be active.or to function
Am stuck.
I don't know if u r getting this
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Now you need to decide on the client, so your options are Web or desktop and do you include mobile options?
If your clients in house and behind the firewall then WPF or winforms are your options. If you want it on the web then pick one of thousands of web frameworks to use.
I would leave any mobile options for a future date.
Never underestimate the power of human stupidity -
RAH
I'm old. I know stuff - JSOP
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Although, he could also do a web site that is restricted to the company's intranet as well.
".45 ACP - because shooting twice is just silly" - JSOP, 2010
-----
You can never have too much ammo - unless you're swimming, or on fire. - JSOP, 2010
-----
When you pry the gun from my cold dead hands, be careful - the barrel will be very hot. - JSOP, 2013
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Yah but I'm a desktop developer and have never liked the web stack since they killed off Silverlight.
Never underestimate the power of human stupidity -
RAH
I'm old. I know stuff - JSOP
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Blazor brings the web app option back to within reason. No JavaScript needed. Just HTML and C#.
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Member 14541728 wrote: I designed a CBT questions and answer using c#
Then tell us how you did this. If you actually wrote code, describe it.
We can't read your mind.
«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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BillWoodruff wrote: We can't read your mind.
Wha??
The difficult we do right away...
...the impossible takes slightly longer.
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Hello I want to print 2 copy of Invoice
1. Original Copy
2. Duplicate copy
i want above text is written on bill on right upper side!
and this event is occurs on one button click
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"I want" is not a question.
Show us what you have tried, tell us where you are stuck, and maybe somebody will be able to help you.
If you were expecting somebody to write the code for you, you've come to the wrong site.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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