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Re: Generics Casting

gnjunge15-Jan-09 0:57

gnjunge

15-Jan-09 0:57

Thanks. Great explanation.

I guess I'm not the only one who bumps into this. Any known workarounds? Or rethink the whole implementation from scratch?

Re: Generics Casting

Simon P Stevens15-Jan-09 1:17

Simon P Stevens

15-Jan-09 1:17

gnjunge wrote:
Any known workarounds?

That kind of depends what you are trying to do.

If you are trying to treat generics of a class tree as a tree themselves, I suspect you are slightly misusing the idea of generic classes. You might be better defining explicit classes instead of generic ones, and then having them all inherit from the same interface or abstract class instead if you need that.

What is it you are trying to archive?

Simon

Re: Generics Casting

gnjunge15-Jan-09 1:43

gnjunge

15-Jan-09 1:43

For now I made my own work around.
The code has changed multiple times, and I'm sure there was a reason for using generics. Have to check it when I have time.

Re: Generics Casting

S. Senthil Kumar15-Jan-09 1:39

S. Senthil Kumar

15-Jan-09 1:39

C# 4.0 brings generic covariance[^]. While the current code will still not compile, inserting an interface will get you going.

public interface IGenericClass<out t=""> where T : Base { public T Item {get; } } // note, having a set will not work

public abstract class GenericClass<t> : IGenericClass<t> {...}

var derived = new FirstImplementation();
IGenericClass<Base> baseInterface = derived;
</t></t></out>

C# 4.0 is still in CTP stage though.

Regards
Senthil [MVP - Visual C#]
_____________________________
My Home Page |My Blog | My Articles | My Flickr | WinMacro

Re: Generics Casting

gnjunge15-Jan-09 1:44

gnjunge

15-Jan-09 1:44

That's great.

Add Row to the Bottom of Grid

satsumatable14-Jan-09 23:11

satsumatable

14-Jan-09 23:11

Hi,

I want to add Rows bottom of the Grid but for some reason it goes here and there or always last but one.

MyGrid.Rows.Add();

Thanks

Re: Add Row to the Bottom of Grid

nelsonpaixao15-Jan-09 6:11

nelsonpaixao

15-Jan-09 6:11

why do you want to add a row to the DGV? Confused | :confused:

You only get that output if you add records to your database, refresh, and display the data in DGV.

You have to remember that you dont edit the DGV, you edit your database!
You use the DGV to display data.

You can add and delete rows but not like you ask here, got it? OMG | :OMG:

nelsonpaixao@yahoo.com.br

trying to help & get help

Re: Add Row to the Bottom of Grid

satsumatable16-Jan-09 0:42

satsumatable

16-Jan-09 0:42

Anyway at last i got the solution !!

I just built a Data Table that is assigned to Data Grid as a Data Source so whenever i make changes in Data Table things are getting affected.

Using Crystal Report from C# .net

Hema Bairavan14-Jan-09 21:40

Hema Bairavan

14-Jan-09 21:40

Hi all,

I want to call a crystal report from C# application
can i know the syntax and process please

waiting for your reply.

Re: Using Crystal Report from C# .net

N a v a n e e t h14-Jan-09 21:56

N a v a n e e t h

14-Jan-09 21:56

Hema Bairavan wrote:
process please

Go to a bookstore and get a C# and crystal report book.

Smile | :)

Navaneeth

How to use google | Ask smart questions

Re: Using Crystal Report from C# .net

Hema Bairavan14-Jan-09 21:59

Hema Bairavan

14-Jan-09 21:59

mr Navneeth,

I KNOW TO DO THAT
, it should be done by using the viewer,
but it is not working?

do you know how to do that?

Re: Using Crystal Report from C# .net

Tom Deketelaere14-Jan-09 22:06

Tom Deketelaere

14-Jan-09 22:06

Well why don't you post some code then.
Say what you expect it to do and what it actually does.
Do you get errors?
If so where and what errors?
...

The way you posed your question is open for the interpretation that you are asking us to completely explain how to show a CR with code and all.
At the very least you have to show that you actually tried it on your own.

Re: Using Crystal Report from C# .net

Eddy Vluggen14-Jan-09 22:41

Eddy Vluggen

14-Jan-09 22:41

Hema Bairavan wrote:
I KNOW TO DO THAT

Well, what book did you buy? Confused | :confused:

Here is a walkthrough, enjoy Smile | :)

I are troll Smile | :)

Re: Using Crystal Report from C# .net

nelsonpaixao15-Jan-09 6:22

nelsonpaixao

15-Jan-09 6:22

it not hard, i thought it was. Almost the same way you do when display data in DGV.

You have to remember that the DGV accepts any kind of dataset regardless of the data scheme, you know? with CR you have to create a dataset (design time) that has a scheme that is 100% of the output of your Store Procedure (i trigger SP).
If you know to display data in a DGV from a triggered procedure is the same.
Use the cristalreportviewer like the DGV.

add cristalreportviewer to application, create cristalreport and dataset in designtime.

i assually run DGV and cristalreportviewer together
i can post the little code later, but is not about it. Unsure | :~

nelsonpaixao@yahoo.com.br

trying to help & get help

Who has the code generator? Can generate C # code

tz_soul14-Jan-09 21:37

tz_soul

14-Jan-09 21:37

Who has the code generator? Can generate C # code

Re: Who has the code generator? Can generate C # code

David NGI14-Jan-09 21:50

David NGI

14-Jan-09 21:50

1SmartCoder is an object to simple mapping (O/R mapping) code generation tool that lets you map and generate well designed Asp.net business, data objects and web pages.

Map objects and embed SQL and business rules
Generate .NET components and DotNetNuke Module in C# with a clean design
Customizable code generator with powerful Template IDE
Extendable special business rules generation with Tag in mapped objects and their attributes.
Support Microsoft Visual Studio 2005 and DotNetNuke 4.x
Do round trip development without losing any of your code changes
Generate common Membership web application with Department, User, Group/Role, Resource/Permission managetment, with it you can focus on the business logic development without trouble permission management.

more: http://www.1smartengine.com

Re: Who has the code generator? Can generate C # code

CPallini14-Jan-09 22:11

CPallini

14-Jan-09 22:11

tz_soul wrote:
Who has the code generator?

The (working) brain. Roll eyes | :rolleyes:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Who has the code generator? Can generate C # code

Hamid_RT15-Jan-09 2:31

Hamid_RT

15-Jan-09 2:31

The computer. Big Grin | :-D

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: Who has the code generator? Can generate C # code

dan!sh 15-Jan-09 1:12

dan!sh

15-Jan-09 1:12

tz_soul wrote:
One Who has the code generator, ~~? C~~can generate C # code.

~~Code~~ Quote of the day.

The word "politics" describes the process so well: "Poli" in Latin meaning "many" and "tics" meaning "bloodsucking creatures."

जय हिंद

Re: Who has the code generator? Can generate C # code

Pete O'Hanlon15-Jan-09 1:52

Pete O'Hanlon

15-Jan-09 1:52

Who has the code generator?

You do. For C#, it's CSC.exe. You could always build your apps using the CodeDOM, but it's easier with csc.exe.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

My blog | My articles | MoXAML PowerToys

Re: Who has the code generator? Can generate C # code

dan!sh 15-Jan-09 2:54

dan!sh

15-Jan-09 2:54

Pete O'Hanlon wrote:
You could always build your apps using the CodeDOM, but it's easier with csc.exe.

Cmon Pete, be a man. Poke tongue | ;-P

The word "politics" describes the process so well: "Poli" in Latin meaning "many" and "tics" meaning "bloodsucking creatures."

जय हिंद

getting array as an input from the user

lawrenceinba14-Jan-09 21:37

lawrenceinba

14-Jan-09 21:37

string[] observations =new string[] {"walk","shop","clean"};
startProbability = new double[] { 0.6, 0.4 };
transitionProbability = new double[,]{{0.7, 0.3},{0.4, 0.6}};
emissionProbability = new double[,] {{0.1,0.4,0.5},{0.6,0.3,0.1} };
problem = new int[] { 0, 1, 2 };

these are the assigned values.. how to get these values as an input from the user... kindly help me out

Re: getting array as an input from the user

S. Senthil Kumar14-Jan-09 22:09

S. Senthil Kumar

14-Jan-09 22:09

You'll have to do some kind of string parsing using a delimiter. For a one dimensional array, assuming that the values in the array will not contain spaces, you can split on the space character.

public T[] ConvertToArray<t>(string s)
{
  string[] arr = s.Split(' ');

  T[] retArr = new T[arr.Length];
  return Array.ConvertAll<string,>(arr, str => (T)Convert.ChangeType(str, typeof(T)));
}
</t>

For 2D arrays, you'll have to have another delimiter to separate dimensions, split on that (recursively?) and call ConvertToArray on the resulting split arrays.

Regards
Senthil [MVP - Visual C#]
_____________________________
My Home Page |My Blog | My Articles | My Flickr | WinMacro

Re: getting array as an input from the user

lawrenceinba14-Jan-09 22:35

lawrenceinba

14-Jan-09 22:35

thanks a lot... Smile | :)

the quieter u become more u hear

How can I convert an object to ArrayList

Naveed72714-Jan-09 21:31

Naveed727

14-Jan-09 21:31

I want to convert object to Array List but stuck how to do.

Actually I am doing this because I am passing argument of an array this array is contains some panels.

When I pass these panels to another form it copy the references of panels. Any thing changes in child form(in panels ) affect the father form panels.

Here is the code.

object obj = array.Clone();

Now the object become object array but there is no technique to convert this obj to object[].

If you have any suggestion to overcome my problem to not copy the references of the array(panels) .

You are most welcome if you give any suggestion.

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