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Luc Pattyn17-Sep-09 5:38

17-Sep-09 5:38

This may all be true and beautiful, but it is not what the OP needs; he is struggling with old VB code and fiddling with InitializeComponent(), so lets stick to the essentials and postpone the unnecessary magic.

BTW: I don't think your and my code are equivalent, mine also matches CheckBox derivatives.

Smile | :)

Luc Pattyn

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Re: VB6 to C# conversion SetIndex issue

xtr33me17-Sep-09 5:44

xtr33me

17-Sep-09 5:44

Thanks for the help! Our code is not the same Luc, but I see what you were trying to do so I am going to play with that. I can't thank you enough for the quick response! Thanks again!

Dan

Re: VB6 to C# conversion SetIndex issue

N a v a n e e t h17-Sep-09 5:45

N a v a n e e t h

17-Sep-09 5:45

My mistake. It should be CheckBox. Updated the post.

Smile | :)

Navaneeth

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premature garbage collection of static class causing problem

akhanal17-Sep-09 4:05

akhanal

17-Sep-09 4:05

Well I know only objects are garbage collected, but please hear me out..

I have a class "serverClass" in my program.cs file in a project. All the members of this class are static, moreover the members of this class are DLLIMPORTS of an unmanaged Dll. This file also has the IDE generated "Program" class which has the Main() function that invokes the Form1 GUI i.e.; Application.Run(new Form1());

Now, I have the Form1.cs file with Form1 class that has buttons and listboxes. The Form1 class has the button events, etc, i have also created a couple of member functions in the Form1 class (startServer() and stopServer()). These functions call the static members of the "serverClass" from the program.cs file. But as I said earlier the serverClass is static class and hence I cannot create an instance to access its functions, instead I go serverClass.function1() (i.e.; className.memberFunction()), serverClass.function2(), etc.

I want to access the startServer() and stopServer() functions on the click of the buttons "Start" and "Stop" respectively. So in the click events of these buttons I call these functions.

The project compiles fine. When I run the application/form and click 'Start' button the startServer() function is called and the server runs fine as desired. But my problem is when I click the 'Stop' button and the stopServer() function is called, I get a runtime error "CallbackOnCollectedDelegate" on the line in the stopServer() function where I call a member of serverClass as serverClass.function2().

I might be wrong in the class structuring itself....I appreciate all the suggestions and ideas.

BTW all of the mentioned classes are in the same namespace.

Re: premature garbage collection of static class causing problem

Luc Pattyn17-Sep-09 4:19

Luc Pattyn

17-Sep-09 4:19

Without seeing any code, all one can do is guess. Maybe you have some local variables inside your static methods, say a delegate inside serverClass.Start() which is passed to some unmanaged piece of code, and hence all managed references to it are lost, so the next time around the GC will throw it out?

Smile | :)

Luc Pattyn

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Re: premature garbage collection of static class causing problem

akhanal17-Sep-09 4:31

akhanal

17-Sep-09 4:31

Yes that was my guess too, the serverClass.Start(), takes a variable serverID so it is actually serverClass.Start(serverID); so I defined this variable in the serverClass as public and I use it in the functions as serverClass.Start(serverClass.serverID); and just to verify I tried printing this variable right before the line of error and it prints fine. As a matter of fact I tried accessing another function of serverClass from this position too, this function just reads some data that does not have anything thing to do with server creation or destruction and it works fine too.

But the combination; serverClass.Stop(serverclass.serverID); is problematic.

If the serverID is ok and serverClass.anotherFunction() is ok then what might be the issue???

Re: premature garbage collection of static class causing problem

Luc Pattyn17-Sep-09 4:57

Luc Pattyn

17-Sep-09 4:57

1. again[^]

2. IMO things that have state should not be modeled as a static.

Smile | :)

Luc Pattyn

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Re: premature garbage collection of static class causing problem

akhanal17-Sep-09 5:18

akhanal

17-Sep-09 5:18

Thank you for your efforts, but I am bound not to release the code.

I tried making the serverClass as non static and defining its functions and variables as non static too but then: The DllImport attribute must be specified on a method marked 'static' and 'extern'

Oh this is something...

Re: premature garbage collection of static class causing problem

akhanal17-Sep-09 5:25

akhanal

17-Sep-09 5:25

one more thing to add here, in the original console based application (c#), both the start() and stop() functions are in the main() and after the start() initiates, the console waits for the user to hit return (Console.readline()) and then the stop() function initiates.

All this works very fine in that application. I just wanted them to initiate on the click of the buttons.

Error in Loading assembly from Assembly.Load

SRKSHOME17-Sep-09 3:31

SRKSHOME

17-Sep-09 3:31

Hi,
I am getting an exception in the following code. Exception is "Could not load file or assembly 'AutomationAddIn, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c1461fa3837aae41' or one of its dependencies. Failed to grant permission to execute. (Exception from HRESULT: 0x80131418)"

AssemblyName _asmName = new AssemblyName();
_asmName.CodeBase = "file://" + "D://dinesh//CSharp//AutomationAddIn//AutomationAddIn//bin//Debug//AutomationAddIn.dll";

 Assembly.Load(_asmName);

Any suggestions?
Thanks.

Re: Error in Loading assembly from Assembly.Load

Not Active17-Sep-09 4:19

Not Active

17-Sep-09 4:19

"file://" is not necessary

only two letters away from being an asset

Re: Error in Loading assembly from Assembly.Load

Luc Pattyn17-Sep-09 4:20

Luc Pattyn

17-Sep-09 4:20

what's with all those double slashes? it is backslash that needs escaping, not slash.

Smile | :)

Luc Pattyn

Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.

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Calling GUI & path finding gurus

izakfick17-Sep-09 3:27

izakfick

17-Sep-09 3:27

Hello

Is there anyone out there that knows how to develop the connection points that indicate relational mappings between two objects.. example: C# dataset designer can indicate foreign key relationships, or MSSQL diagrams also have the same connecting points that are adjustable. Adjustable by means of it not always being a straight line at all times..

So i'm building a busines object modeller and require the ability to show relational connection points on my business objects on a designer canvas. This leads my to believe that a implentation of maybe IDesignerHost is valid, but i would not know where to start with those connecter objects..
The connecting points must indicate what type of relationship it it and also must be adjustable when moved by using the mouse..

any ideas where to start.. please help.
Regards

Re: Calling GUI & path finding gurus

Pete O'Hanlon17-Sep-09 4:11

Pete O'Hanlon

17-Sep-09 4:11

You could always start by downloading Netron[^], and having a look to see how this was solved there.

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Allow space in text box - add the code for allowing spaces in regular expression validator

coolsharath17-Sep-09 3:21

coolsharath

17-Sep-09 3:21

Hi All,

In my text box i need to allow alphanumerics and some special characters. Below is the code i used in Regular expression valiadator -it works perfectly fine.
"^[0-9a-zA-Z,@&_.-]+$"

I need to allow spaces in textbox. so can anyone please help me how to add it. I tried to add a space in the above existing validation but throws an error. Help required in this. Thanks in advance.

Thanks,
Santa.

Re: Allow space in text box - add the code for allowing spaces in regular expression validator

Calla17-Sep-09 3:40

Calla

17-Sep-09 3:40

Did you try with \s for the white space?
How does your code look like?

Re: Allow space in text box - add the code for allowing spaces in regular expression validator

coolsharath17-Sep-09 3:51

coolsharath

17-Sep-09 3:51

How to add the \s in the above expression. I added in many ways and saw it was not working.

Thanks,
Santa

Re: Allow space in text box - add the code for allowing spaces in regular expression validator

coolsharath17-Sep-09 4:06

coolsharath

17-Sep-09 4:06

can anyone plese help me in this issue.
i am struck here ..
requirement --- need to allow spaces text box so to need to add code for it in the regular expression validator.

Thanks,
Santa

Re: Allow space in text box - add the code for allowing spaces in regular expression validator

Calla17-Sep-09 4:20

Calla

17-Sep-09 4:20

This code:

Regex rx = new Regex(@"\s");
string test = "1234 abc";
			
if (rx.IsMatch(test))
   Console.WriteLine("White space");
else
   Console.WriteLine("No white space");

gives the output: White space for me.

Re: Allow space in text box - add the code for allowing spaces in regular expression validator

coolsharath17-Sep-09 4:26

coolsharath

17-Sep-09 4:26

can you please tell me how to add this \s in this expression
"^[0-9a-zA-Z,@&_.-]+$".
Thanks in advance.

Thanks ,
Santa

Re: Allow space in text box - add the code for allowing spaces in regular expression validator

OriginalGriff17-Sep-09 4:36

OriginalGriff

17-Sep-09 4:36

I think you need to learn a little bit about regular expressions, as it is simple to add the \s to your expression. Try looking at Expresso[^] which is a tool for creating, testing and examining regular expressions.

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how one can programatically send keystroke, mouse move, mouse click

Tridip Bhattacharjee17-Sep-09 2:18

Tridip Bhattacharjee

17-Sep-09 2:18

suppose i have one form with one button and i want when i will click the button then mouse will go to a folder and double click on it to open. so please someone tell me how can i do this programatically.

i need this type of idea for developing screen sharing apps. i can develop apps with remoting that which run in client machine and capture client screen and send the scree to my apps and then my apps paint its screen with that image. it is easy but suppose client desktop has one folder called test and when i will click on the picture of that test folder from my end then what i need to send as a result apps in client end can programatically open that folder.

please i need good idea to move in right direction to develop a screen share apps. please give me the idea that how to open folder of client machine after clicking on the image of client desktop transferred by apps sitting in client machine.

i will be highly obliged if anyone can help me to develop this apps with idea and also can tell me if is there any site available from where i can download the sample code.

Thanks in advance

tbhattacharjee

how to see datagrid print printpriview in c# windows.

Ramesh Reddy1111117-Sep-09 2:17

Ramesh Reddy11111

17-Sep-09 2:17

i written following code under printDocument1_PrintPage event

Font f = new Font("Arial", 14, FontStyle.Regular);
Brush b = Brushes.Black;
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
for (int j = 0; j < dataGridView1.Columns.Count; j++)
{
e.Graphics.DrawString(this.dataGridView1(i, j) + " ", f, b, j * 5, i * 5);
}
}

i am getting error this.dataGridView1(i, j)
error message isError 1 Non-invocable member FormsApplication2.Form1.dataGridView1' cannot be used like a method.
please help me .

Re: how to see datagrid print printpriview in c# windows.

Henry Minute17-Sep-09 2:48

Henry Minute

17-Sep-09 2:48

The part of your code that is giving the error is

e.Graphics.DrawString(<big>this.dataGridView1(i, j)</big> + " ", f, b, j * 5, i * 5);

You are using this.dataGridView1(i, j) as if there were a DataGridView method that takes a row index and a column index and returns the value stored there. There is no such method.

You need to use square brackets '[]'.
Like this:

e.Graphics.DrawString(<big>this.dataGridView1[i, j]</big> + " ", f, b, j * 5, i * 5);

but as you have it you will get incorrect results, as it is dgrid[colindex, rowindex] and you are using dgrid[rowindex, colindex]

You can use something like

e.Graphics.DrawString(this.dataGridView1.Rows[i].Cells[j].Value.ToString() + " ", f, b, j * 5, i * 5);

so that you do not get confused about cols and rows.

Note also the .Value.ToString() in the last bit of code, you may, or may not need to use it in your code.

Henry Minute

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Windows Service Credentials

Sangioo17-Sep-09 2:09

Sangioo

17-Sep-09 2:09

Hi,

I developped a windows service and I'd like to retrieve its own credentials (the "Run As" credentials, not the WindowsIdentity). Is it possible?

If yes, can those credentials be converted to NetworkCredentials? (for webservices calls)

thanks

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