Re: System.Timers.Timer doesn't stop with Stop() - C# Discussion Boards

loupceuxl21-Jul-09 4:11

21-Jul-09 4:11

Hi from what I understand, the built-in System.Windows.Forms.Label class inherits from the System.Windows.Forms.Control class. Is there any way to change the Form.Label class' inheritance to a custom (SectionControl) class which is derived from the Forms.Control class?

so basically,

class SectionControl : Control
class MyLabel : Label

but override/replace the existing implict 'System.Windows.Forms.Label : Control' inheritance to 'System.Windows.Forms.Label : SectionControl'.

That way I get the benefits from both the SectionControl and MyLabel specializations. If this is possible I would proceed to add MyTextBox, MyCheckBox, etc... classes also deriving from the obvious parent and thereby retaining the commonality of all the custom controls in the SectionControl class. As C# doesn't allow multiple inheritance, and as i'm not interested in a semantic Interface either I'm at a loss. Any suggestions?

Re: Inheritance

PIEBALDconsult21-Jul-09 4:16

PIEBALDconsult

21-Jul-09 4:16

No. But you could wrap a Label in something that derives from SectionControl.

Calculation of Efficiency using Microsoft Solver Foundation

Anuj Chauhan from India21-Jul-09 3:47

Anuj Chauhan from India

21-Jul-09 3:47

Hi All,

Is it possible to calculate Efficiency of different Business Units on the basis some inputs and output using Microsoft Solver Foundation?

Following is the sample data for which efficiency needs to calculate.
Each row here represent the details of each Business Units.
1st column "Location" contains the location of business unit
2nd & 3rd columns "Personal" & "Business" are the outputs
4th column "Staff" is the input.

Location Personal Business Staff
Croydon 125 50 18
Dorking 44 20 16
Redhill 80 55 17
Reigate 23 12 11

In MS Excel, there is a add-in named as "Solver" that can be used to calculate the efficiency. For that we need to add the weighted output, weighted input and some more columns to meet the requirement of Solver add-in.

I believe some thing similar should be existing with Microsoft Solver Foundation, and can be calculate the efficiency programatically.

you all are requested to provide your thoughts on the same...

An earlier reply will be appreciated.

Regards,
Anuj Chauhan
anuj.mca@gmail.com
+91 9313499294
http://www.linkedin.com/in/anujchauhan[^]

Get file path hosted by an Excel process

Muneeb Abdul Shakoor21-Jul-09 3:38

Muneeb Abdul Shakoor

21-Jul-09 3:38

Hi!
I want to get the file path hosted by a certain excel process. I have its Process object only.
Thanks in advance.

Re: Get file path hosted by an Excel process

Brij21-Jul-09 3:45

Brij

21-Jul-09 3:45

Check the Link

Hope it helps

Cheers!!
Brij

Re: Get file path hosted by an Excel process

Muneeb Abdul Shakoor21-Jul-09 3:57

Muneeb Abdul Shakoor

21-Jul-09 3:57

Thanks for your reply. But that code brings focus forcefully to the excel application which I dont want and Marshal.GetActiveObject() will not work in that case.

System.Timers.Timer doesn't stop with Stop()

SimpleData21-Jul-09 2:24

SimpleData

21-Jul-09 2:24

Hi I have a timer which I've created in runtime with System.Timers.Timer myTimer = new System.Timers.Timer(10000);

I make some settings of this timer and start it with this code:

myTimer.Elapsed += new ElapsedEventHandler(myMethod);
myTimer.Start();

After myTimer started I stop myTimer using myTimer.Stop();

Some time later I need to start myTimer again so I start it with myTimer.Start(); But the weird thing is that it didn't actually stop when myTimer.Stop(); was executed. It's like two instances of myTimer are ticking at different times but I just want the last one to work.

How can I solve this problem?

Thanks in advance.

Re: System.Timers.Timer doesn't stop with Stop()

Abhishek Sur21-Jul-09 2:55

Abhishek Sur

21-Jul-09 2:55

I think the code block where new ElapsedEventHandler is added is called more than once.

It means when even is raised, more than once the myMethod will be called, and hence the timer will be incremented.

Abhishek Sur

My Latest Articles
Working with Excel using MDAC

Basics on LINQ and Lambda Expressions

Create .NET Templates

Re: System.Timers.Timer doesn't stop with Stop()

SimpleData21-Jul-09 2:58

SimpleData

21-Jul-09 2:58

So can I add more than one ElapsedEventHandler to my timer right?

If I

myTimer.Elapsed += new ElapsedEventHandler(Method1);
myTimer.Elapsed += new ElapsedEventHandler(Method2);

then when myTimer ticks both Method1 and Method2 runs, right?

If I

myTimer.Elapsed += new ElapsedEventHandler(Method);
myTimer.Elapsed += new ElapsedEventHandler(Method);

then when myTimer ticks Method will run twice, right?

Re: System.Timers.Timer doesn't stop with Stop()

stancrm21-Jul-09 3:18

stancrm

21-Jul-09 3:18

right

Re: System.Timers.Timer doesn't stop with Stop()

DoctorMick21-Jul-09 3:18

DoctorMick

21-Jul-09 3:18

Right, right and right again.

Re: System.Timers.Timer doesn't stop with Stop()

SimpleData21-Jul-09 3:19

SimpleData

21-Jul-09 3:19

Thank you, then problem solved Big Grin | :-D

Re: System.Timers.Timer doesn't stop with Stop()

PIEBALDconsult21-Jul-09 4:13

PIEBALDconsult

21-Jul-09 4:13

Yes, but I doubt you want to do that; did you do that accidently?

Re: System.Timers.Timer doesn't stop with Stop()

SimpleData21-Jul-09 4:14

SimpleData

21-Jul-09 4:14

Yes.

Re: System.Timers.Timer doesn't stop with Stop()

Abhishek Sur21-Jul-09 21:37

Abhishek Sur

21-Jul-09 21:37

So on every block I think it is better to do

myTimer.Elapsed -= new ElapsedEventHandler(Method);
myTimer.Elapsed += new ElapsedEventHandler(Method);

By this way even if this block is running more than one, everytime it will remove the eventhandler and then add it. Provided, if you are unsure that this block will run more than once.

Thumbs Up | :thumbsup:

Abhishek Sur

My Latest Articles
Working with Excel using MDAC

Basics on LINQ and Lambda Expressions

Create .NET Templates

Re: System.Timers.Timer doesn't stop with Stop()

SimpleData21-Jul-09 23:28

SimpleData

21-Jul-09 23:28

Thank you, that is a nice way of doing it too.

But I solved it with adding a global int called Session with default value 0. And everytime I get this adding ElapsedEventHandler if this session is greater than 1 I don't add it.

Re: System.Timers.Timer doesn't stop with Stop()

Abhishek Sur22-Jul-09 21:47

Abhishek Sur

22-Jul-09 21:47

yes .. this is a possible way...
nice to hear that you solved it.

Cheers. Thumbs Up | :thumbsup:

Abhishek Sur

My Latest Articles
Working with Excel using MDAC

Basics on LINQ and Lambda Expressions

Create .NET Templates

Re: System.Timers.Timer doesn't stop with Stop()

PIEBALDconsult21-Jul-09 4:11

PIEBALDconsult

21-Jul-09 4:11

Ummm... what? I didn't understand what you were trying to say.

What are you trying to accomplish and what problem are you having?

Re: System.Timers.Timer doesn't stop with Stop()

SimpleData21-Jul-09 4:13

SimpleData

21-Jul-09 4:13

I had a timer which I stopped and started some time later. But when I started it for the second time it was doing what it was doing when ticked twice. It turned out that I was adding new eventhandler twice Smile | :)

Re: System.Timers.Timer doesn't stop with Stop()

Luc Pattyn21-Jul-09 4:17

Luc Pattyn

21-Jul-09 4:17

So in the end this article[^] is about you?

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.

Re: System.Timers.Timer doesn't stop with Stop()

SimpleData21-Jul-09 4:19

SimpleData

21-Jul-09 4:19

Seems that way.

Debugging unmanaged DLL called from managed C#

Chesnokov Yuriy21-Jul-09 2:09

Chesnokov Yuriy

21-Jul-09 2:09

I've got simple console C# project that calls unmanaged DLL with Interop. I need to step into native DLL function either from C# or debug native DLL and break in C++ debugger.

I set up Enable unmanaged code debugging in C# console.
The DLL function is called correctly, e.g. it prints the message to console.

But as I run DLL with F5 and it invokes C# console, the break points do not work.
Nor can I step into DLL unmanaged code from C# console

Чесноков

Re: Debugging unmanaged DLL called from managed C#

stancrm21-Jul-09 3:23

stancrm

21-Jul-09 3:23