.NET (Core and Framework) Discussion Boards

GlobX6-Jan-11 14:05

6-Jan-11 14:05

Ah, ok, generic as in the normal meaning, not the specific programming meaning (i.e. List<KeyValuePair> or List(Of KeyValuePair)), right, sorry - misunderstood you.

In that case, if both ends are WCF, you should be able to cast the Value property objects when they come out the other end to their specific types (assuming you have access to them, i.e. you've included the assembly on the other end). If not I believe you would have to do some funky deserialisation code and manipulation of raw XML, yuck!

I would stick with the D.A.D.S. principle when talking about objects going over the wire:

[DataContract]
public class KeyValuePair
{
    [DataMember]
    public string Key { get; set; }
    [DataMember]
    public string Value { get; set; }
}

I agree with Mark, though - why not use WCF? You get all the data types on the receiving end as "real" objects, no loss of Intellisense. Plus, it feels safer Smile | :)

As for your original question/situation, that is a tough one - I'd need to think that one through for a while. I like to use role-play (just leave it Wink | ;)

) Walk yourself through the maintenance cycle with a pencil and paper, "you rolled a 5, new HW support required" or "you rolled a 2, implementation of HW type X changes" (no need for a die, that was purely for example). I find working through these situations helps me choose the easier path.

Don't really know if that's what you're looking for... I have emptystomachitis, off to lunch!

Re: Design question

#realJSOP7-Jan-11 0:16

#realJSOP

7-Jan-11 0:16

I still think my way of doing it is easier and much less maintenance intensive.

".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
-----
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass." - Dale Earnhardt, 1997

About my project [modified]

mandarapu27-Dec-10 21:42

mandarapu

27-Dec-10 21:42

hi,
i am doing one task in my project.i need to update the holidays in the frontend(ASP.NET).but when i am entering the data it is not getting saved and displaying data as "holiday id cannot allow null values".
i checked in the backend there is no problem in that it is displaying correctly.
only problem is front end.
In the holiday id identity specifications i incremented the properties.eventhough error is coming.

insert into HolidayList(Holiday,Date,Day)
values
(@Holiday,@Date,@Day);

select HolidayId = SCOPE_IDENTITY();

the query used in the sqlserver.in this we are not declaring the holidayid but when we are executing it automatically gets incremented.suppose there are 6 values in table if we enter the next value it automatically displays as 7 value and getting exeuted.
but when coming to the front end it is not saving the data.when we are clicking on the save the page is getting refreshed.

please give me the solution.it is very urgent for me.

thanks
Amala

modified on Tuesday, December 28, 2010 10:11 AM

Re: About my project

Abhinav S27-Dec-10 21:48

Abhinav S

27-Dec-10 21:48

You need to post some code here. Until then, it is virtually impossible to figure out the exact problem.

The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.

My latest tip/trick

Re: About my project

Eddy Vluggen28-Dec-10 7:25

Eddy Vluggen

28-Dec-10 7:25

mandarapuamala wrote:
the query used in the sqlserver

And how does the table-definition look? What columns and datatypes does it have?

mandarapuamala wrote:
"holiday id cannot allow null values".
i checked in the backend there is no problem in that it is displaying correctly.

Any triggers that are defined on the table?

mandarapuamala wrote:
but when coming to the front end it is not saving the data.when we are clicking on the save the page is getting refreshed.

Are you doing an insert or an update at that point?

mandarapuamala wrote:
please give me the solution.it is very urgent for me.

This is a free site and questions are answered by volunteers like you, in their spare time. Demanding them to hurry would be inappropriate.

You could also plough through the SCOPE_IDENTITY[^]-documentation on MSDN Smile | :)

I are Troll Suspicious | :suss:

Re: About my project

Ashwini K Singh8-Jan-11 3:23

Ashwini K Singh

8-Jan-11 3:23

I would suggest to use relevant title so that other people can benefit it Smile | :)

Convert a string to delegate

ptr_Electron27-Dec-10 1:18

ptr_Electron

27-Dec-10 1:18

"Callback" is the delegate. I have a calculated string which give the function name and I want to pass this string to delegate. How can I achive this. Please advice

String FunctionName ="Myfunction"
String FunctionID="5679"

FunctionName = FunctionName + "_" +FunctionID



cbk->m_pCallBack = gcnew Callback(this, FunctionName); // actually I should pass the addrss of function, but I had a functionName string

Please advice

Re: Convert a string to delegate

_Erik_27-Dec-10 3:14

_Erik_

27-Dec-10 3:14

What you ask is tricky, tedious and ugly, and I would suggest you to find a better approach. That said, I think I can give you some clues for what you are asking for, though I have not tested it:

Since you have the function name, you might use reflection to get its MethodInfo object. The MethodInfo has a property called MethodHandle, which returns a RuntimeMethodHandle object. This object can give you an IntPtr function pointer just invoking its GetFunctionPointer method, and you can convert this IntPtr function pointer to a delegate using Marshal.GetDelegateForFunctionPointer. As I said before, tricky, tedious and ugly. If you explain us a little more of what you want to do, maybe we can help you to find a better solution.

Re: Convert a string to delegate

ptr_Electron27-Dec-10 18:31

ptr_Electron

27-Dec-10 18:31

//function names string array

static array<String^>^ FunctionNames = gcnew array<String^> {
	
	//CMap <int ,int,CString,LPCTSTR> m_FunctionList
  	
    "&MyClass::Function_1",
    "&MyClass::Function_2",
    "&MyClass::Function_3",
    "&MyClass::Function_4",
    "&MyClass::Function_5",
.....
    "&MyClass::Function_40"
};

array<FLE^> ^ entry = gcnew array<FLE^>(40);

for each (String^ FuncName in FunctionNames) // if I dont use a loop here and manually add them all then no issues...
	 {
	
		//FunctionName = FunctionName + "_" + FunctionID; need to pass a Function pointer to the below function
		String FunctionName ="Myfunction"
		String FunctionID="Count.ToString();

		FunctionName = FunctionName + "_" +FunctionID="
		cbk->m_pCallBack = gcnew Callback(this, FunctionName);

		m_FL->Add(FunctionID, entry[iCount]);
		
		iCount++;
	}

Re: Convert a string to delegate

_Erik_28-Dec-10 3:48

_Erik_

28-Dec-10 3:48

I see you are storing the function names into a string array. Why don't you use a Dictionary<string, callback=""> to store the pair? The string representing the function name would be the key, and the corresponding delegate for that function would be the value. It would be much easier than what you pretend to do.

Re: Convert a string to delegate

Espen Harlinn2-Jan-11 0:52

Espen Harlinn

2-Jan-11 0:52

Some more info on what you are trying to achieve would be helpfull.

Not able to connect VS 2008 and SQL Server2000

saksp23-Dec-10 18:24

saksp

23-Dec-10 18:24

I am using ASP.Net 2008, and I want to connect Database SQL Server 2000 But when i add new database connection "Network related - Or Instance specific error occurred while establishing connection to the SQL Server." error comes. and when I connect to SQL Server 2005 it works properly. Anyone know the solution.

thanks

Re: Not able to connect VS 2008 and SQL Server2000

T210224-Dec-10 2:41

T2102

24-Dec-10 2:41

if you can connect with odbcad32.exe, then go to connectionstrings.com as your connection string is not correct.

Use Gruop By in Datatable.Compute() method

Naunt22-Dec-10 22:54

Naunt

22-Dec-10 22:54

Dear All,

I have the follow data in my Dataset1.Table(0)

col1	Col2	Col3	Col4	Col5	Qty
SS  	111	SIN	C	20	114
SS  	111	SIN	C	40	28
SS  	111	SIN	S	20	165
SS  	111	SIN	S	40	189

I want to SUM(Qty) those are same color
The result will like below

SSUM  	111	SGSIN      20	279   (row1 + row3)
SSUM  	111	SGSIN	   40	217   (row2 + row4)

I don’t want to loop and sum row by row. Is there any DataTable Method to get my result?

If I use like this how will be my result?

Dataset1.Table(0).Compute("Sum(Qty)","Group by Col1,Col2,Col3,Col5")

Please, any suggestion for the best way.
Thanks and Best Regards

Re: Use Gruop By in Datatable.Compute() method

TweakBird23-Dec-10 0:52

TweakBird

23-Dec-10 0:52

Have a look on this Helper[^]

Link2[^]

Re: Use Gruop By in Datatable.Compute() method

Manish Choudhary .NET expert27-Dec-10 20:25

Manish Choudhary .NET expert

27-Dec-10 20:25

Try this code:
You have to select each group from the table. Declare a new DataTable Temp, now select the group values or distinct value in this datatable by following code( I am using C# language.)

DataTable TEMP = new DataTable();
TEMP=Dataset1.Table(0).DefaultView.ToTable(true,"Col4");

Now the TEMP table will have following values in it-

1. C
2. S

Now you can use loop and

DataSet.Compute("Sum(Qty)","Col4='"+TEMP.Rows[location][0].ToString()+"'")

method for data stored in TEMP.

You can not use DataSet.Compute() method for multiple values as it is a single value function.
Big Grin | :-D

For any further clearification please mail me at cybosoft@gmail.com

C#, VB.NET,ASP.NET DEVELOPER

Compiler question

_Zorro_21-Dec-10 23:30

_Zorro_

21-Dec-10 23:30

Hello,

Today I've noticed something interesting to me and I'd like to understand.

Let's say I have a function like this one:

public enum SomeEnum
{
    Value1 = 0,
    Value2 = 1
}

public void DoSomething(SomeEnum theEnum)
{
    if(theEnum == SomeEnum.Value1)
        return;
}

When I build the project which is a ClassLibrary in Debug mode the compiler translates that to:

public void DoSomething(SomeEnum theEnum)
{
    if(theEnum == 0)
    {
        return;
    }
}

But when I build the same project in Release mode the result is:

public void DoSomething(SomeEnum theEnum)
{
    if(theEnum == null)
    {
        return;
    }
}

This seems to happen only when the Enum has two values.

Anyone?
Thanks.

Re: Compiler question

Luc Pattyn22-Dec-10 1:46

Luc Pattyn

22-Dec-10 1:46

_Zorro_ wrote:
the compiler translates that to...

I doubt that very much. How do you make such observation?
if reflector is involved (which version?), have a look at the IL code itself (not the decompiled "source" code), and show it here.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

Re: Compiler question

_Zorro_28-Dec-10 2:58

_Zorro_

28-Dec-10 2:58

Sorry for the delay, didn't checked my mail in a while D'Oh! | :doh:

Ok, I had to be drunk that day, even if i'm pretty sure of what I saw I am unable to reproduce that issue today... It's been an hour I'm trying with no success so I'll leave it there.

I shouldn't have deleted my test project... D'Oh! | :doh:

Thank's to you both for your answers and happy new year!

Re: Compiler question

T210223-Dec-10 12:51

T2102

23-Dec-10 12:51

Also doubt that, especially since the optimizing compiler is likely to change the test to !theEnum instead of using the == operator.

Re: Compiler question

_Zorro_28-Dec-10 2:59

_Zorro_

28-Dec-10 2:59

My reply above, thanks!

Return TreeNode Control in .NET Remoting

ganesh_IT21-Dec-10 23:07

ganesh_IT

21-Dec-10 23:07

Hi guys, now am in a remoting project. I need to transfer a TreeNode control using remoting.
Is it possible in remoting i don't know, if any one know explain me

Thanks in advance
ganesh_IT

Why is my AnyCPU program forced to 32-bit?

Geron21-Dec-10 2:54

Geron

21-Dec-10 2:54

I have this C# application that has been compiled as "AnyCPU". No problem running it on my 32bit machines. Nor my 64-bit machines. But a friend of mine is having a strange issue where the app seem to be forced into 32-bit-mode (TaskManager marks it with "(*32)"). This in turn causes a "BadImageFormatException" when a pice of code relying on a external DLL is loaded (during install the correct .dll file is copied based on wether Windows is 64 or 32 bit). CorFlags tell me that the application isnt force to 32bit, so why the heck is it running as 32 bit on a 64 bit OS?! (and yes, the .Net framework is installed for both 64 and 32 bit on the machine in question).

Re: Why is my AnyCPU program forced to 32-bit?

fjdiewornncalwe21-Dec-10 4:18

fjdiewornncalwe

21-Dec-10 4:18

Because AnyCPU will compile to target the lowest common denominator of supported hardware which is 32 bit.

I wasn't, now I am, then I won't be anymore.

Re: Why is my AnyCPU program forced to 32-bit?

harold aptroot21-Dec-10 23:42

harold aptroot

21-Dec-10 23:42

No it doesn't, you will get something that will run in 32bit mode on 32bit platforms and 64bit mode on 64bit platforms.
IMO it's a shame it's the default, many programs actually can't run in 64bit mode at all but were never tested.

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