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the IF will fit here . google strategy pattern also enlightening . refactor condision with strategy also .
f(yf) = yf
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Well, C# only supports function overloading by parameters not return type (which incidentally is not the case for .NET overall) so you either need to create a different named function for each type which is probably useless for what you're trying to do or make your function return an object.
Everything is an object you see, then you can downcast it to whatever you want later. The as keyword is good for this (with reference types).
Regards,
Rob Philpott.
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Thanks for your suggestions. I have a feeling it can be solved somehow using Generics, but I'm not sure how. Anybody have an idea?
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Well I'm not sure if this'll help, but you can do something like this:
public T GetInstanceOf<T>() where T : new()
{
return new T();
}
Standards are great! Everybody should have one!
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arnold_w wrote: How should I implement the getAllItems method?
You shouldn't. What you propose in a real context would likely be considered bad practice from a design perspective. However the code you posted makes no sense. What is the purpose of a class with members myString, myInt, myByte? these are meaningless. Classes are for designing an Object Oriented structure not a Type Oriented structure. Class names and member names should be meaningful not meaningless.
led mike
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Oh lord - you're reconstructing the Variant structure. Please don't do it - there's a reason that we let it die. Don't bring it out of the grave.
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Pete O'Hanlon wrote: Oh lord - you're reconstructing the Variant structure. Please don't do it - there's a reason that we let it die. Don't bring it out of the grave.
Oh Peter, you should know - just like it's progenitor (VB) - it never really died. It's there when you go to bed at night.
You can glance it's fat bulbous a$$ out of the corner of your eye, yet when you look straight at it there's no telling what it'll be. A sock, a chair? Who knows.
But just remember: while you sleep it will come and steal your memory ...
I'm largely language agnostic
After a while they all bug me 
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MidwestLimey wrote: But just remember: while you sleep it will come and steal your memory ...
Noooooooooooooooooooo!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 
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Thank you all for your time and help.
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Hello everyone,
I need to build up using C# HTTP Server (HTTP Listener, which could parse various HTTP fields, like post data and return response) and I also need to get an HTTP client which could package various HTTP fields (like URL, post data, etc.).
Are there any sample codes to recommend? I searched MSDN, failed to find any complete client and server samples. I have searched some other samples, which is built on TCP listener, and manually package/unpackage from TCP other than HTTP package level.
thanks in advance,
George
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Hi All,
Is there a way to suppress/hide a section programmatically???
Thanx.
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I've got some GUI win forms project1 with some class developed say SomeClass. That class has serialization ability to save its object to file and load it later.
SomeClass.Serialize()
{
...
IFormatter formatter = new BinaryFormatter();
formatter.Serialize(stream, this);
...
}
SomeClass SomeClass.Deserialize()
{
using (Stream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read))
{
IFormatter formatter = new BinaryFormatter();
return (SomeClass)formatter.Deserialize(stream);
}
}
Now the GUI has assemblyinfo.cs with its assembly AssName1  . I run the GUI and serialize the class to file. In that file that AssName is present at the beggining of the file.
Now I have another project2 with different name and assembly name AssName2. I added that SomeClass.cs code to that project and try to deserialize the object from that project.
It says:
can not find assembly "AssName1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"
If I serialize that class from project2 it puts AssName2 to the serialized file. So it seems you can not share the serialized versions of SomeClass between differently named projects?
How can I deserialize the SomeClass object in project2 which was saved in project1?
chesnokov
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The problem you have is that you've duplicated the code for SomeClass in both assemblies. This will make them different classes. (A classes full name includes it's assembly name).
What you need to do is only define SomeClass in one place, and reference it from everywhere that needs it. I would suggest you create a 3rd project (of type class library), call is SharedLibrary and place SomeClass.cs in that project. Then reference SharedAssembly from both Project1 and Project2.
(You can add references by right clicking on the project in the solution explorer and clicking "add reference", then using the browse tab to brose to the file.)
You can also create 2 solutions. The first containing Project1 and the SharedLibrary and the second containing project2 and the SharedLibrary. Now when you click "add reference" the SharedLibrary will appear under the projects tab.
Simon
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I want read digital input status from Advantech PCI card,
but I have error like this:
"System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
//My Device configuration******************
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ADSDAQ]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ADSDAQ\Device000]
"DeviceName"="PCI-1730 SwitchID=0 I/O=5000H"
"DriverName"="ADS1730.dll"
"KernelKey"="ADS1730S"
"BoardID"=dword:00000087
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ADSDAQ]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ADSDAQ\Device000]
"DeviceName"="PCI-1730 SwitchID=0 I/O=5000H"
"DriverName"="ADS1730.dll"
"KernelKey"="ADS1730S"
"BoardID"=dword:00000087
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ADS1730S]
"Type"=dword:00000001
"Start"=dword:00000002
"Group"="Extended Base"
"ErrorControl"=dword:00000001
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ADS1730S\Device000]
"DeviceName"="PCI-1730 SwitchID=0 I/O=5000H"
"DriverName"="ADS1730.dll"
"KernelKey"="ADS1730S"
"BaseAddress"=dword:00005000
"BoardID"=dword:00000087
"SwitchID"=dword:00000000
"AllowConflicts"=dword:00000001
"Interrupt"=dword:00000000
"TimerClock"=dword:0000000a
"OnSystem"=dword:00000001
"BusNumber"=dword:00000000
"SlotNumber"=dword:00000000
"CardNo"=dword:00000000
"Trigger Mode"=dword:01010101
000:
My Code:********************************************************,
//Import dll********************
[DllImport( "adsapi32.dll", SetLastError = true, CallingConvention = CallingConvention.Winapi )]
private static extern int DRV_DeviceOpen( int DeviceNum, ref int DeviceHandle );
[DllImport( "adsapi32.DLL", SetLastError = true, CallingConvention = CallingConvention.Winapi )]
private static extern int DRV_DioReadBit( int DriverHandle, ref PT_DioReadBit lpDioReadBit );
[StructLayout( LayoutKind.Sequential )]
public struct PT_DioReadBit
{
public UInt16 port; //USHORT port;
public UInt16 bit; //USHORT bit;
public IntPtr state; //USHORT far *state;
}//PT_DioReadBit, FAR * LPT_DioReadBit;
**********USING********:
int errCde;
int driverHandle = 0;
int deviceNum = 0;
errCde = DRV_DeviceOpen( deviceNum, ref driverHandle );
PT_DioReadBit readBit = new PT_DioReadBit();
readBit.port = 0;
readBit.bit = 0;
errCde = DRV_DioReadBit( driverHandle, ref readBit );
int value = readBit.state.ToInt32();
modified on Wednesday, April 2, 2008 10:06 AM
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arturw82 wrote: int driverHandle = 0;
int deviceNum = 1;
errCde = DRV_DeviceOpen( deviceNum, ref driverHandle );
Considering you're using an arbitrary handle and not a handle that's returned from the driver, it's no surprise that you're getting this message. Is it documneted anywhere that the driver handle will always be 0?? I doubt it... The same is true for the device number.
Your single best source of information on this is going to be the manufacturer of the board and the library you have to use to talk to it. Since your applciation is so very specific to a single piece of rarely-seen hardware, it's very unlikely your post is ever going to be seen by anyone with first-hand knowledge on using it.
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Sorry, this error i have when deviceNum = 0;
When deviceNum = 1 i have error code "30" from function DRV_DioReadBit "Invalid driver handle"
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Ok, great. This still doesn't change the fact that you're asking the wrong group of people for help with a very specific piece of hardware.
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Hello all,
I have got 2 problems while working with crystal reporting in C#. I am a beginner with C# and crystal report
1. In my software every user has to be signed in with an ID and password. Now how can I show one particular user's report in crystal report. As a beginner I have used the wizard. But using the wizard I can show the full data table but not the data of a particular user with photograph.
2. I am using dotnetcharting class library for charting in my software. How can I include this tool in crystal report? In the report more than one charts will show the data of a particular user (who is signed in).
Please help me to solve this out
Thanks in advance 
Faysal,
MSc Candidate, U-Health Lab,
Department of Biomedical Engineering,
Kyung Hee University, South Korea.
email: faysal_002299@yahoo.com
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as far as the execution speed is concerned , should we use the crystal reports ?
I think , the exporting concepts should be implemented , over the crystal reports.
If you have an apple & I have an apple and we exchange our apples, then each of us will still have only one apple but if you have an idea & I have an idea and we exchange our ideas, then each of us will have two ideas!
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hello,
How can i display my word document that contain text and images into my richtextbox?
best regards
dghdfghdfghdfghdgh
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Save the word document as RTF and open it up in the RTB.
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but can this save method made automaticaly in the c# application or into a buffer without putting data into ma disk
best regards
dghdfghdfghdfghdgh
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There are several controls on codeproject that allow to display word files. Use search to find them.
Giorgi Dalakishvili
#region signature
my articles
#endregion
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Hi,
Please can anyone got answer of the following issue:
I have developed a Web Part in SharePoint using C#.Net. A TreeView control I have created which is pointing to some directories. Created an event of the TreeView (SelectedNodeChanged) Which is not firing all the time. Sometime it fires and sometime its not. I cant figure out the reason of such abnormal behavior. Find the attached code. Please help.
--------------------------------------------------------------------
CreateChildControl
{
Some More Codes here.....
TreeViewReportListTree.SelectedNodeChanged += new EventHandler(TreeViewReportListTree_SelectedNodeChanged);
Controls.Add(TreeViewReportListTree);
Some more codes here.....
}
----------------------------------------------------------------------
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