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Hi all,
I have a class which inherit from System.WindowsForm.UserControl and an interface (with a method named Update)
I want to implement the Update method of my interface and not the user control method
is there a way to do that ?
like in C++ void Interface::Update() ? 
Thanks in advance
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You can have two update methods.
public void Update()
{
}
public void IMyInterface.Update()
{
}
MyControl control = GetControl();
control.Update();
((IMyInterface)control).Update();
The version called depends on what you have a reference to. If you have a reference to the class or one of its bases then the Update() method will be called, if you have a reference to the interface the IMyInterface.Update() will be called.
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Hi
void DoThis()
{
try
{
DangerousCall();
}
catch( MyExpectedException e )
{
}
catch ( Exception e1 )
{
}
}
You can replace the catch all catch ( Exception e1 ) with a parameterless catch catch { ... }.
...snip...
catch( MyExpectedException e )
{
}
catch
{
}
Why? What does this give you? Can you get any exception info?
I've done a test and you can't use catch (Exception e) with catch { } as the compiler knows that is already a catch all in there. Confused .
"More functions should disregard input values and just return 12. It would make life easier." - comment posted on WTF
"This time yesterday, I still had 24 hours to meet the deadline I've just missed today."
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No. The error is caught, but you can't get any detail about it. It has the effect of suppressing the error.
All exceptions derive from System.Exception, so catch {Exception e} will catch all exceptions regardless of type. You should only use catch {} if you deliberately want to suppress an exception if it is raised.
Paul
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Thanks. So it effectively replaces Catch(Exception e) but gives you less information.
Why would you want to not know what caused a problem?
I understand why you want to swallow exceptions, not rethrow them, etc, I do it when interfacing to an external system which is up and down like a yo-yo, but I like to at least look at the exception to see why if failed, and then optionally log it.
"More functions should disregard input values and just return 12. It would make life easier." - comment posted on WTF
"This time yesterday, I still had 24 hours to meet the deadline I've just missed today."
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Malcolm Smart wrote: Why would you want to not know what caused a problem?
Generally it is laziness. It is part of the anti-pattern known as try-catch-ignore.
However, there are "good" uses for it. And I put "good" in quotes because it stretches my incredulity a bit.
You could have used it in .NET 1.x before they had things like TryParse on DateTime and int to check if the parse operation completed successfully. You were probably not interested in why it went wrong, just that it did. TryParse just returns a boolean to say if the parsing failed or not.
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Malcolm Smart wrote: Why would you want to not know what caused a problem?
I'm not saying that it is good practice to use it, only that the language supports it.
Paul
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That depends on if you are using framework 1 or 2.
In framework 1, the difference is that catch(Exception) catches .NET exception, while a parameterless catch catches all exceptions.
In managed code you can only throw exceptions that derive from System.Exception, but if you call unmanaged code it may throw any object as an exception.
If you need to handle all exceptions in framework 1, you should use both a catch(Exception) and a parameterless catch, so that you get all available information.
In framework 2, anything thrown that doesn't derive from System.Exception is wrapped inside a System.Runtime.CompilerServices.RuntimeWrappedException object, so there is no longer any use for a parameterless catch. To specifically catch unmanaged exceptions you use catch(RuntimeWrappedException), otherwise you can just use catch(Exception) to catch them too.
---
single minded; short sighted; long gone;
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Good explanation. I think that's the clearest one I've seen in a while.
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Thanks. 
---
single minded; short sighted; long gone;
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Hi,
I have a MS Outlook application developed in C#.net.
Now I want to access a users calendar in outlook and get the meetings
scheduled, mails send & receive, respond and send meeting requests, etc. In other
words anything that happens with calendering on Outlook desktop
client, I want to develop that in my .net application.
I guess there must be a way to talk to the back end server and retrieve
the info for seamless integration with any application. I mean
interfaces, functions or objects.
As you can see I have no clue how to go about it.
Any help will be highly appreciated.
Thanks in advance.
Senselva
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Hi,
everything you need to know is on CDOLive:
http://www.cdolive.com[^]
____________________________________
There is no proof for this sentence.
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Hi,
How to create the Google Suggest feature with ASP.NET 2.0 using C#. Please help me with Sample code. Thanks in Advance
Jebin
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Use the keywords "auto complete" in CP, and you will see tons of articles about feature like Google Suggest
---------------------------------
Believe what you saw!
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when i run the application (c#) to get the parameters list of the report ( sql2005.reporting service)
it shows an error:
=============================
"System.Net.WebException: The request failed with HTTP status 502: Proxy Error ( The ISA Server denied the specified Uniform Resource Locator (URL). ).
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at TFIReportClient.RPTWebReference.ReportingService.GetReportParameters(String Report, String HistoryID, Boolean ForRendering, ParameterValue[] Values, DataSourceCredentials[] Credentials) in ...."
=============================
so, what can i do?
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You already posted this question here.[^] Please don't cross post.
Paul
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i dont get you
please elaborate more !!
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You posted your question in multiple forums. This is considered rude and makes it difficult for people to collaborate on a solution.
Paul
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code for reading afile from the folder on c#
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where is the code I also want the same
Man you should explain your problem
Paras Kaneriya
The difference between genius and stupidity is that genius has its limits.
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You should read the help on how to ask questions. And you should learn how to use google.
File.ReadAllBytes
or
File.ReadAllLines
will read a file.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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Hello,
I developed an application in C# .net. It also uses SQL server as database backend. I created an installer of this application which puts all the dlls,cofig file and related files to C:\MyApp folder. At some point of time the SQL connection breaks and apllication got crashed.
The problem starts after this event. Now though the connection is perfect then also the application threw the same sql exception. Some how it knows that this application was crased previously beacause of SQL error.
To confirm this i copied all the files from installable folder and pasted in another place, generated the same error by modifying the connection string(so it ll not find the required connection) from config file and tried to run it. It fails(perfect).
Now i correct the connection string and restart the application, it works.
So my trouble is that why the application from installer folder keep refers to the previous error and don't let it run.
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hi all,
How to display 5 or more images in a PictureBox in quick succession say within 2 seconds?
Thanks and regards,
praveen
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By setting a timer, and changing the image every time ?
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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