Re: Getting upper special character of a key from KeyPressEventArgs.KeyChar - C# Discussion Boards

Member 87436711-Apr-05 8:03

11-Apr-05 8:03

Hi I am experiencing a problem with the .Net ArrayList that I hope someone is familiar with. I have an interface that multiple classes derive from. For example:

public interface ITest
{
void TestFunc1();
void TestFunc2();
}

class Test1 : ITest
{
}

class Test2: ITest
{
}

When these classes are instantiated, they are inserted into an arraylist which, as I understand, converts them into objects. When I try to use the objects in the array, I wanted to cast them to the interface and call methods against it. This is so I would not have to know the type of object in the array, just that it adhered to the interface contract. This way I could iterate using the same line of code:

arraylist[0] = new Test1(); for example
arraylist[1] = new Test2();

((ITest)arraylist[0]).TestFunc1(); // calls Test1 TestFunc1();
((ITest)arraylist[1]).TestFunc1(); // calls Test2 TestFunc1()

The polymorphic behavior works outside of the arraylist but as soon as the objects are inserted, they seem to lose the inheritance heirarchy. For example, the cast to ITest is flagged as invalid. I can cast to the derived type (Test1 or Test2) and this works but forces me to know the specific type that was inserted. I tested replacing the interface derivation with a base class

public class Test1 : BaseClassTest
{

{

and tried to cast using ((BaseClassTest)arraylist[0]).TestFunc1();
with the same invalid cast error. Does anyone know of a way to recover an element out of a .Net collections and recover the base derivation without using dynamic invocation or reflection? Sorry for the complicated example but thanks in advance for your help.

Re: Arraylist cast

Darryl Borden11-Apr-05 9:43

Darryl Borden

11-Apr-05 9:43

I set up the following and it appeard to work fine for me without any problems.

public interface ITest
{
void TestFunc1();
void TestFunc2();
}

class Test1 : ITest
{
public void TestFunc1()
{
MessageBox.Show("Here1");
}
public void TestFunc2()
{
MessageBox.Show("Here2");
}
}

class Test2: ITest
{
public void TestFunc1()
{
MessageBox.Show("Here3");
}
public void TestFunc2()
{
MessageBox.Show("Here4");
}
}

private void button1_Click(object sender, System.EventArgs e)
{
ArrayList al = new ArrayList();
al.Add(new Test1());
al.Add(new Test2());
((ITest)al[0]).TestFunc1();
((ITest)al[1]).TestFunc2();
}

I got "Here1" and "Here4" as exptected

Darryl Borden
Principal IT Analyst
dborden@eprod.com

Location for PDB file

benjymous11-Apr-05 5:43

benjymous

11-Apr-05 5:43

In Visual C++, you can define the output path for a pdb file like so:

/PDB:c:\Some\path\to\my\debuginfo.pdb

which lets us keep all the pdb's in a single location

However C# only seems to have an option to turn on the debugging info, but nowhere to specify where the info should go

Does anyone know if there's an option somewhere I'm missing?

--
Help me! I'm turning into a grapefruit!
Phoenix Paint - back from DPaint's ashes!

Re: Location for PDB file

Dave Kreskowiak11-Apr-05 6:57

Dave Kreskowiak

11-Apr-05 6:57

Nope. You didn't miss anything, you just can't find what's not there...

C# Compiler Options[^]

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Getting upper special character of a key from KeyPressEventArgs.KeyChar

Rama Sharma11-Apr-05 3:39

Rama Sharma

11-Apr-05 3:39

In a particular situation, I have a KeyPressEventArgs.KeyChar property from which using the code I am getting value of selected Ascii character. I am able to show all lower ascii characters on the keyboard. If I want to show upper-case (or upper) characters for these keys, I am able to use the ToUpper() method to get the upper characters on the alphbatic keys (i.e., from "A" to "Z"). However, when I try to get the upper keys on the numeric keys, I am not able to use ToUpper() method.

The problem is that in the particular program on which I am working, I am getting only partial ascii values (i.e., lower keys only and not the upper keys). Due to some peculiar reasons, I have to live with this situation. I want to get the upper keys on the keyboard by checking the status of the "Shift" key.

Thus, how can I get the upper keys of the keyboard (for numeric keys) such as #, ^, &, *, $, etc. by programatically combining with Shift key status the the lower key values such as 5, 6, 7, 8, etc.? Is there any method equivalent to ToUpper() which can be used to convert, say 4 to $ (i.e., lower to upper key)?

Re: Getting upper special character of a key from KeyPressEventArgs.KeyChar

leppie11-Apr-05 3:43

leppie

11-Apr-05 3:43

No, every keyboard has its own layout.

^{xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots}

Re: Getting upper special character of a key from KeyPressEventArgs.KeyChar

Rama Sharma11-Apr-05 4:01

Rama Sharma

11-Apr-05 4:01

thanks for the quick reply.

But, even as per a given layout of a keyboard, can i represent the upper key (whatever it may be in a keyboard layout) using the lower key and the status of Shift, by accessing some method similar to ToUpper.

I have seen method such as IsSymbol in the char structure, which can tell me whether it is a symbol or not. My problem is how to get the symbol on the upper key(whatever it might be) from the lower key?

I hope I am clear about the requirement facing me.

Re: Getting upper special character of a key from KeyPressEventArgs.KeyChar

Dave Kreskowiak11-Apr-05 4:27

Dave Kreskowiak

11-Apr-05 4:27

.ToUpper() does NOT mean the upper, or Shifted, character on the keyboard. It simply converts a string to its Upper Case equivalent (lower case, UPPER CASE.) There is no function that will convert your key code to whatever the Shift-keycode is.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Starting services programatically

Esmo200011-Apr-05 3:37

Esmo2000

11-Apr-05 3:37

How do I start a service programatically? Is there a way to do it from the command prompt or in the service installer?

Thanks a lot,
Jim

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Re: Starting services programatically

leppie11-Apr-05 3:49

leppie

11-Apr-05 3:49

Add the System.ServiceProcess.dll as a reference and use System.ServiceProcess.ServiceController

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Re: Starting services programatically

Esmo200011-Apr-05 4:09

Esmo2000

11-Apr-05 4:09

Thanks, but how do I use that? I don't see a start command.

Thanks,
Jim

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Re: Starting services programatically

hooray11-Apr-05 4:13

hooray

11-Apr-05 4:13

try this:

this.serviceController1 = new System.ServiceProcess.ServiceController("place here the name of the service");

serviceController1.Start();

Re: Starting services programatically

Dave Kreskowiak11-Apr-05 4:19

Dave Kreskowiak

11-Apr-05 4:19

You didn't look very hard. ServiceController.Start Method[^] docs on MSDN.

ServiceController myService = new ServiceController(@"MyServiceName");
if ( (myService.Status.Equals(ServiceControllerStatus.Stopped) ) ||
   ( myService.Status.Equals(ServiceControllerStatus.StopPending) ) )
{
    myService.Start();
}
else
{
    Console.WriteLine("Service is already running...");
}

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Using the FillSchema() method with the Data Access Application Block

Andretux11-Apr-05 2:40

Andretux

11-Apr-05 2:40

Hello people,

i'm using the DAAB (Enterprise Library) to access the data in my system. But I need to use the schema from the tables i'm reading....

when I was using the default DataAdapter, I have used the FillSchema() method, but now, when I use de DAAB to fill de data, I couldn't get the primary keys columns, unique columns neither autoincrement columns...

This is the code that i'm using to get the data with DAAB:

===========================

Database db = DatabaseFactory.CreateDatabase();

DBCommandWrapper cmd = db.GetSqlStringCommandWrapper("SELECT * FROM Customer");

ds = db.ExecuteDataSet(cmd);

===========================

But this code don't return the schema from the "Customer" table.

Do you have any tip to do it?

thanks people

André

Change system locale

Mahesh Varma11-Apr-05 1:49

Mahesh Varma

11-Apr-05 1:49

Hi all,

Is there any API to change the system locale ?

I need to write a C# application which takes LCID as input, and based on the LCID it should change the system locale.

Thanks
Mahesh

Re: Change system locale

hooray11-Apr-05 2:21

hooray

11-Apr-05 2:21

how about putting this into the main

CultureInfo ci = new CultureInfo("De-de");
Application.CurrentCulture = ci;

the constructor of the cultureinfo accepts both - a string for the region or the code as int

Re: Change system locale

elizas16-Feb-10 22:46

elizas

16-Feb-10 22:46

SharePoint provides options to create sites with different types of locales available out of the box. Suppose we have a SharePoint site built using the English locale and we want to change the existing site to some other locale then this can be achieved using the following piece of code. Changing the locale of the site helps display the date and number formats with their respective decimal and group separators.

http://www.mindfiresolutions.com/Changing-SharePoint-site-locale-programmatically-834.php[^]

Cheers,
Eliza

Autocad + C#

Newbie_Toy11-Apr-05 0:54

Newbie_Toy

11-Apr-05 0:54

Anybody have a component that can use C# to view Autocad file like zoom in, zoom out?

Re: Autocad + C#

leppie11-Apr-05 1:36

leppie

11-Apr-05 1:36

You have already been answered. D'Oh! | :doh:

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Reading Data from an Excel File Using C#! Help please!

AfzalHassen11-Apr-05 0:50

AfzalHassen

11-Apr-05 0:50

Hi,

I am trying to read data from an Excel spreadsheet cell by cell which contains data with which I want to perform string manipulation and then save to SQL srvr..all the data in the spreadsheet are of a string data type..

I have recieved some help from one of the members of this site who gave me some direction, but using VB.NET code...I want to specifically use C# for this task.

How do i open the .xls file in order to read data from it??
How do I read the data from the cell(s) in a specified worksheet??
and (if i need to) how do i close the .xls file??

any advice and help will be greatly appreciated.

Thanks a million..
Afzal Hassen

Afzal Hassen

combobox items

chindiwo10-Apr-05 23:45

chindiwo

10-Apr-05 23:45