variable names - C# Discussion Boards

Re: collection as a parameter in an interface method

10-Dec-09 6:22

Are you talking about using a dot net collection parameter in a dot net interace method?

Could you please provide some more details so that the scenario becomes clearer?

There's nothing left in my right brain and nothing right in my left brain.

modified on Thursday, December 10, 2009 12:40 PM

Chiman111-Dec-09 17:34

Chiman1

11-Dec-09 17:34

ok..

Let say ..

Interface IMyInterface
{
void DisplayData(??????);
}

Class MyClass : IMyInterface
{

void IMyInterface.DisplayData(??????)
{
Logic to display data
Display First Name ,
Display last name...
}
}

///From client.

Class Client
{

//I have a data structure (some data container or .net collection obj) , which saves data in a<< key , value >> format ..

MyClass myclass = new MyClass()
myclass.DisplayData( ???)
}

My question is how can i pass a collection data structure as a parameter in a interface DisplayData() method ??

Can i directly pass a collection object in interface method?? (Please note that this is an interface method and can be used by other languages.)

Send a class object to a webservice

Gktony10-Dec-09 5:32

Gktony

10-Dec-09 5:32

Hi all,

I am trying to send a class to a web service but I get error

SoapException was unhandled by user code
System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Runtime.InteropServices.COMException (0x800706BA): The RPC server is unavailable.

It happens when I call the webservice in the follwoing line
info.sendInformation(createFile);

here is my web method,

[WebMethod]
public void sendInformation(object info)
{
etc.
}

and my code to call it

info createFile = new info();

createFile .Reference = txtReference.Text;
createFile .AccountNo = txtAccountNo.Text;
createFile info = new InfoService ();
info.sendInformation(createFile);

and the class

public class fax : TestPage
{

public string Reference
{
get { return _Reference; }
set { _Reference = value; }
}

public string AccountNo
{
get { return _AccountNo; }
set { _AccountNo = value; }
}
etc.

}

Thanks

Re: Send a class object to a webservice

hammerstein0510-Dec-09 5:52

hammerstein05

10-Dec-09 5:52

I'm pretty certain that

info createFile = new info();

createFile .Reference = txtReference.Text;
createFile .AccountNo = txtAccountNo.Text;
createFile info = new InfoService ();
info.sendInformation(createFile);

doesn't compile. Can you clarify. And although I stand to be corrected, I'm pretty sure you can't send Object to a web service, it needs definition. Make your service accept an Info object or Fax as it is.

Re: Send a class object to a webservice

Gktony10-Dec-09 6:08

Gktony

10-Dec-09 6:08

Sorry I copied it wrong, the following is the correct one and compiles fine

info createFile = new info();
createFile .Reference = txtReference.Text;
createFile .AccountNo = txtAccountNo.Text;
InfoService info = new InfoService ();
info.sendInformation(createFile);

Even if I define the same class in the web service still doesn't work because is different namespace.

Thanks

Re: Send a class object to a webservice

hammerstein0510-Dec-09 6:30

hammerstein05

10-Dec-09 6:30

Ok. In your web service, define your class. Then accept the type of Fax in your sendInformation method of the WS.

Now, when you consume the web service, a type of Fax will become available. Visual studio creates code files to represent the objects you can pass up so, without you physically defining the file locally, you can;

Fax createFile = new Fax( );

createFile.Reference = txtReference.Text;
createFile.AccountNo = txtAccountNo.Text;

InfoService info = new InfoService( );

info.SendInformation( createFile );

Where your WS method looks like;

[WebMethod]
public void SendInformation( Fax info)
{
// do something with info in here
}

variable names

benjamin yap10-Dec-09 4:59

10-Dec-09 4:59

Hi,

I want to create an Annotation object inside a foreach loop with different name for it.

Example

foreach(...)
{
Annotation anno_1 = charts[0].CreateAnnotation();
}

How can i create the name of the Annotation foreach item..

example anno_1, anno_2, anno_3..

thanks

Keith Barrow10-Dec-09 5:05

Keith Barrow

10-Dec-09 5:05

At a stab:

List<Annotation> annotations = new List<Annotation>();

foreach(var chart in charts)
{
 Annotations.Add(chart.CreateAnnotation());
}

CCC solved so far: 2 (including a Hard One!)
37!?!! - Randall, Clerks

OriginalGriff10-Dec-09 5:05

OriginalGriff

10-Dec-09 5:05

Why? How are you going to refer to them again? (without confusing the code with reflection of your running stuff?) Why not just keep them in a list like everyone else?

All those who believe in psycho kinesis, raise my hand.

PIEBALDconsult10-Dec-09 5:18

PIEBALDconsult

10-Dec-09 5:18

Choose a different language. You can do that in DCL[^]. Big Grin | :-D

But, seriously, use System.Collections.Generic.List<Annotation>.

benjamin yap10-Dec-09 5:22

10-Dec-09 5:22

actually this is the code i want to run inside the foreach loop

// Add annotation to the line chart.
Annotation aonnotation = m_ChartControl.Charts[0].AnnotationList.CreateAnnotation();

// Bind annotation to the first category in the last series (Volume).
// X coordinate is category
// Y coordinate is series
aonnotation.Location.TypeX = LengthType.Bound;
aonnotation.Location.X = 6;
aonnotation.Location.TypeY = LengthType.Bound;
aonnotation.Location.Y = 0;

// Set annotation properties
aonnotation.Data = "     ";
aonnotation.Font.Size = 4;
aonnotation.Font.Bold = false;
aonnotation.Color = Color.FromArgb(1, 1, 1);

modulePath = this.GetType().Module.FullyQualifiedName;
moduleDir = Path.GetDirectoryName(modulePath);
aonnotation.ImageFile = Path.Combine(moduleDir, "ArrUp.png");

This code will be create in each loop, but i cannot use the same variable name aonnotation because i need different name to generate annotations onto my chart.

Abhinav S10-Dec-09 5:32

10-Dec-09 5:32

Could you use an IEnumerable collection here?

There's nothing left in my right brain and nothing right in
my left brain.

benjamin yap10-Dec-09 5:39

10-Dec-09 5:39

could you give me a little sample of using IEnumerable in my above code?

thanks

Abhinav S10-Dec-09 5:47

10-Dec-09 5:47

foreach(...){IEnumerable<annotation> anno = charts[0].CreateAnnotation();}

You can then access each of the annotation objects like an array.

anno[0].<property> = "...." etc.

There's nothing left in my right brain and nothing right in my left brain.

benjamin yap10-Dec-09 5:53

10-Dec-09 5:53

hmm i get this error

Error 21 Cannot implicitly convert type 'Manco.Chart.CF.Layout.Annotation' to 'System.Collections.IEnumerable'. An explicit conversion exists (are you missing a cast?)

I tried doing this also cant work

IEnumberable<annotations> anno = m_ChartControl.Charts[0].AnnotationList.CreateAnnotation();

Abhinav S10-Dec-09 5:58

10-Dec-09 5:58

Apologies. This may work.

IEnumerable<Annotation> anno;<br />
foreach(...){ anno.Add(charts[0].CreateAnnotation());}

You can then access each of the annotation objects like an array.

anno[0]. = "...." etc

There's nothing left in my right brain and nothing right in my left brain.

benjamin yap10-Dec-09 6:06

10-Dec-09 6:06

hmm

now i get this error

Error 21 'System.Collections.Generic.IEnumerable<Manco.Chart.CF.Layout.Annotation>' does not contain a definition for 'Add' and no extension method 'Add' accepting a first argument of type 'System.Collections.Generic.IEnumerable<Manco.Chart.CF.Layout.Annotation>' could be found (are you missing a using directive or an assembly reference?)

Luc Pattyn10-Dec-09 6:08

Luc Pattyn

10-Dec-09 6:08

of course that should work. and so would a List<Annotation> as has been said earlier. I suggest you read up on the List class and some generic stuff, it is really powerful, and you can use it as an array (and more).

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Keith Barrow10-Dec-09 6:12

Keith Barrow

10-Dec-09 6:12

[Edited to clarify my rubbish English]
The problem is, judging from your code, m_ChartControl.Charts[0].AnnotationList.CreateAnnotation(); creates an individual annotation not a collection of annotations. This is causing the error you are getting.

In my earlier post, List<Annotation> is IEnumerable, and it shows you how to add individual annotations.

The problem you are experiencing in getting an answer here is because what you asked for in your original post is highly unusual in c# (though possible in laguages that follow a different paradigm). The normal c# practise is to create a in instance of a collection type such as list, array or collection (or their generic equivalents which are better) and add objects to the collection (rather than trying to create paremeters for each). You can the iterate over the collection as required.

What is the reason for trying to create a parameter-per-annotation?

CCC solved so far: 2 (including a Hard One!)
37!?!! - Randall, Clerks

PIEBALDconsult10-Dec-09 6:32

PIEBALDconsult

10-Dec-09 6:32

What is it you're foreaching?

benjamin yap10-Dec-09 17:56