Re: classes as enum (or something like an enum) - C# Discussion Boards

Positioning MdiChild in the Parent Form

Randal Vance Cunanan9-Dec-09 2:14

Randal Vance Cunanan

9-Dec-09 2:14

Simple question:

How do I position an MDI child form inside the parent form when you call the child form?

Thanks.

Re: Positioning MdiChild in the Parent Form

Randal Vance Cunanan9-Dec-09 2:18

Randal Vance Cunanan

9-Dec-09 2:18

Nevermind. Found a solution.

Changed the startup position property of the childform to "Manual".
Then you can specify the Location of the childForm when it is created.

Any other way to do this?
Thanks.

classes as enum (or something like an enum)

Nathan Gloyn9-Dec-09 1:53

Nathan Gloyn

9-Dec-09 1:53

I'm working with a third party web service that exposes a status property on one of its classes but this property is in fact another class itself.

Whilst this is no great shakes I'm trying to make use of this web service easier for other developers in the company since the web service is abstracted away and we have our own adapter classes exposing just the properties/methods we need and I have been trying to come up with a way that will allow me to treat the status object much like a enum

What I would like to end up with is something like object.status = StatusAdapter.<value>
which would allow something along the lines of if(foo.Status == StatusAdapter.NotStarted){...}

Before anybody says 'simply use an enum' the reason I am not simply using an enum is that the status data that the web service object represents can be added to by a user at any time which means that I need to create all relevant classes required at run-time. If I used an enum I'd have to change the class library and re-deploy to all applications that use it.

I cannot use an interface as was suggested here [^] simply because the consumers of the class library will not be the ones extending the list of statuses they are just needing to use the statuses I provide.

Any ideas?

Re: classes as enum (or something like an enum)

Keith Barrow9-Dec-09 2:32

Keith Barrow

9-Dec-09 2:32

Nathan Gloyn wrote:
exposes a status property on one of its classes but this property is in fact another class itself

What do you mean by this excatly, is there a subtype-per-status (good OO, but exposing the problem of translating this to Web/WCF services)? If so the following code will be possible:

ReturnObjectType value =  Method();
if(value.Status is StatusType)
{
 ...
}

Method is the service method invoked
ReturnObjectType is the return type of the Service method call.
StatusType is the type of the status you are looking for.

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

Re: classes as enum (or something like an enum)

Nathan Gloyn9-Dec-09 3:11

Nathan Gloyn

9-Dec-09 3:11

No subtype just different property values.

But what I wanted to do is present to users of my class library the values in a form something akin to an enum so that if they create an object and need to set the status of it you wouldn't have to use some sort of 'magic string'

Re: classes as enum (or something like an enum)

Keith Barrow9-Dec-09 3:36

Keith Barrow

9-Dec-09 3:36

Pity.

The "magic string" effect is a consequence of [good] advice from Microsoft WRT to maintainability of the service. If they had exposed an enum, adding new values would involve re-gen'ing the client & rebuild, also the numeric values of the enums can change.

Really the message contract types aren't OO'd in the full sense, they are close to object like data bags.

To get round this problem we have converters to convert Data Contracts from the server to pukka objects on the client side. This can be automated with a bit thought.

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

Re: classes as enum (or something like an enum)

PIEBALDconsult9-Dec-09 5:10

PIEBALDconsult

9-Dec-09 5:10

Make a static class that exposes properties that are of the proper type?

public static class StatusWrapper
{
    private static StatusClass notstarted = new StatusClass ( whatever means not started ) ;

    public static StatusClass NotStarted { get { return notstarted ; } }

    ...
}


StatusClass status = StatusWrapper.NotStarted ;

Or, if that's too ummm... static... the wrapper could use a Dictionary to map enumerated values to the status type.

Re: classes as enum (or something like an enum)

Nathan Gloyn9-Dec-09 5:19

Nathan Gloyn

9-Dec-09 5:19

Thanks PIEBALDconsult both of those answers may be of some use, I must admit to leaning towards the dictionary simply because its a) simple b) can hold as many statuses as the user may want to create.

Admittedly not sure how the end developer may interact with the dictionary but perhaps thats me just being dumb as not coded it yet. Smile | :)

How to query a matrix using LINQ

@_csharp9-Dec-09 1:33

@_csharp

9-Dec-09 1:33

int[][] num = {
      int[]{0, 4, 3, 4},
      int[]{1, 3, 0, 0},
      int[]{0, 0, 0, 0},
      int[]{3, 1, 3, 0}
};

how to use LINQ to found that follow the location (vertical)
0,0
1,0
2,0
3,0

In case, result is 2;
How to count the value larger than zero?

Re: How to query a matrix using LINQ

^Sir Dot Net9-Dec-09 8:46

^Sir Dot Net

9-Dec-09 8:46

try:
from n in num
from z in n
where z > 0
select new Point(n,z)

Re: How to query a matrix using LINQ

@_csharp9-Dec-09 13:02

@_csharp

9-Dec-09 13:02

no work..

any idea?

Re: How to query a matrix using LINQ

^Sir Dot Net10-Dec-09 14:07

^Sir Dot Net

10-Dec-09 14:07

Give this a shot. The tough part was trying to figure out how to get the indexer (using Select func)

var q = from n in num.Select( ( a, index ) => new { IX = index, Arr = a } )
        from z in n.Arr
        where z > 0
        select new {
             RootIndex = n.IX,
             Value = z
        };

This'll flatten out the matrix and only return index/values where value > 0
$Shucks | :-\$

Deplying a C# Application with Database Connection!

dennis_max279-Dec-09 1:23

dennis_max27

9-Dec-09 1:23

I've a application running now with a database connection and wanna make a deployment of it

I tried much things. So that's why I'm asking now is there a easy guide to follow where I can see what to do.

My connection string is hard coded, after I deployed the application it's still hard coded what is the way to let the Data Source (Computer Name) change automaticly to the new computername where it is installed?

(return @"Data Source=KONING-AF02EAF7\SQLEXPRESS;Initial Catalog=KringVrienden;Integrated Security=True";)

SofwareI'm using:
Visual Studio 2008.
SQL Server 2005
SQL Management Server 2005

Please help me.
Dennis,

Re: Deplying a C# Application with Database Connection!

loyal ginger9-Dec-09 4:25

loyal ginger

9-Dec-09 4:25

I am assuming that each of your target machine has a db server installed.

In your program use System.Environment.MachineName to get the machine name. Use this instead of the hard-coded machine name in your connection string.

Hope this helps.

Re: Deplying a C# Application with Database Connection!

vtchris-peterson9-Dec-09 4:45

vtchris-peterson

9-Dec-09 4:45

Rather than including your development machine name, simply use ".\SQLEXPRESS" or "(local)\SQLEXPRESS" as this will point to instance "SQLEXPRESS" on the local machine.

Code Project

Muhammad Farooq Qadri9-Dec-09 1:16

Muhammad Farooq Qadri

9-Dec-09 1:16

what is meant by threading? Muhammad Farooq Qadri, Ghousia Public School and Ghousia Institute of Fast Technology (GIFT), Khuiratta Azad Kashmir

Muhammad Farooq Qadri, Khuiratta AJK

Re: Code Project

Rob Philpott9-Dec-09 1:18

Rob Philpott

9-Dec-09 1:18

Dude,

You've posted this FOUR times.

http://msdn.microsoft.com/en-us/library/3e8s7xdd(VS.71).aspx

Regards,
Rob Philpott.

Re: Code Project

Ashfield9-Dec-09 1:28

Ashfield

9-Dec-09 1:28

Well, its like posting the same question several times. I would suggest you go to google and try there, there are over 500,000 articles.

Bob
Ashfield Consultants Ltd
Proud to be a 2009 Code Project MVP

Code Project

Muhammad Farooq Qadri9-Dec-09 1:15

Muhammad Farooq Qadri

9-Dec-09 1:15

what is meant by threading? Muhammad Farooq Qadri, Ghousia Public School and Ghousia Institute of Fast Technology, Khuiratta Azad Kashmir

Muhammad Farooq Qadri, Khuiratta AJK

Code Project

Muhammad Farooq Qadri9-Dec-09 1:15

Muhammad Farooq Qadri

9-Dec-09 1:15

what is meant by threading? Muhammad Farooq Qadri, Ghousia Public School and Ghousia Institute of Fast Technology, Khuiratta Azad Kashmir

Muhammad Farooq Qadri

Re: Code Project

Programm3r9-Dec-09 1:17

Programm3r

9-Dec-09 1:17

What is meant by threading?[^]

The only programmers that are better C# programmers, are those who look like this -> Green Alien | [Alien]

Programm3r
My Blog: ^_^

Code Project

Muhammad Farooq Qadri9-Dec-09 1:08

Muhammad Farooq Qadri

9-Dec-09 1:08

code project is really a big project, working for IT development. Muhammad Farooq Qadri, Ghousia Public School and Ghousia Institute of Fast Technology, Khuiratta Azad Kashmir

Muhammad Farooq Qadri

Re: Code Project

Programm3r9-Dec-09 1:12

Programm3r

9-Dec-09 1:12

Huh?

The only programmers that are better C# programmers, are those who look like this -> Green Alien | [Alien]

Programm3r
My Blog: ^_^

Memory Consumption

abcurl9-Dec-09 0:44

abcurl

9-Dec-09 0:44

string str = null;
can u tell, In the above line of code, what shall be teh memory consumption by the variable str

Re: Memory Consumption

Rob Philpott9-Dec-09 0:56

Rob Philpott

9-Dec-09 0:56

Well, str is a reference type which doesn't reference anything, so it will be just the size of reference itself. I think this will be 4 bytes for the reference itself, and a further 8 for synchronisation and other .NET internal stuff. So, likely 12 bytes.

Regards,
Rob Philpott.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.