C# Discussion Boards - CodeProject

Anonymous22-Jul-05 7:44

22-Jul-05 7:44

i think i had the same problem a time ago
you need to install Oracle Data Provider ( i think you can download 4 free)
and use the objects in the Oracle.DataAccess namespace ( firs add the dll to the project )

Re: oracle with c#

seyakuza24-Jul-05 4:32

seyakuza

24-Jul-05 4:32

how can i find it..?

also i found something in the oracle's web...
it s writing thet 'you can connect to 9i with this for .NET ftamework' i try but i couldn t do...

aqny other ideas..?

tnx

Rational Rose (not XDE) and C#

LiamD21-Jul-05 23:59

LiamD

21-Jul-05 23:59

I am wondering how people manage the transfer of design in Rational Rose to Visual Studio and C# (and vice versa). I know the Rational has XDE which allows round trip development - this is not an option for me. I am using Rose Pro ver 8.3.

I want to be able create code in VS using C# and take the class diagram over to Rose. And also create a model in Rose and transfer that to VS as easily as possible.

I could retype all the information between the two but this seems a long winded way of doing it. Does anyone have suggestions on how to achieve this with greater ease?

Thanks,
Liam

concatenate text into a .def file

Member 211897921-Jul-05 23:30

Member 2118979

21-Jul-05 23:30

Hi I want to update a .def file from different window forms .I want to concatenate some text in the .def file and dont want to lose already available text in the .def file. Is there a option to directly concatenate into a file or do I need to store all the information in a class and then write it.

Thanks and Regards
KR

Re: concatenate text into a .def file

Mike Dimmick22-Jul-05 0:02

Mike Dimmick

22-Jul-05 0:02

When creating your StreamWriter, use a constructor[^] which takes a boolean 'append' parameter. Specify 'true' for this parameter.

Stability. What an interesting concept. -- Chris Maunder

Re: concatenate text into a .def file

Dave Kreskowiak22-Jul-05 4:47

Dave Kreskowiak

22-Jul-05 4:47

If you want to append this text to the very end of the file, then follow what Mike said. Otherwise, you'll have to read the file in, write the beginning of the file back out until you reach the point where you want to append your text, append your text, then continue writing out the rest of the .def file.

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

Customize errors

lovelylooney21-Jul-05 23:23

lovelylooney

21-Jul-05 23:23

Hello All,

I want to customize error messages returned by exceptions. For example I want to customize the following error

"Error [42000] [Microsoft] [Odbc SQL Server Driver] [SQL Server] could not find stored procedure"

I know I can restrict exception.message and throw a customized error, but how I will know whether the error is because of this..or something else...

Could anyone please let me know how can I do that in C#...

Thanks

Looney

Re: Customize errors

MihirV22-Jul-05 0:19

MihirV

22-Jul-05 0:19

hi
you have to write two catch Block to handle ODBC and other type of exception..

try<br />
{<br />
//..Code that generate error<br />
}<br />
catch(OdbcException odbc_ex)<br />
{<br />
for (int i=0; i < myException.Errors.Count; i++)<br />
{<br />
if (odbc_ex.Errors[i].NativeError == 42000)<br />
Console.WriteLine("Procedure not found...");<br />
else<br />
Console.WriteLine(odbc_ex.Errors[i].Message);<br />
}<br />
}<br />
catch(Exception ex)<br />
{<br />
//..<br />
}

Mihir...

Re: Customize errors

lovelylooney23-Jul-05 20:09

lovelylooney

23-Jul-05 20:09

Thanks a lot. I will follow what you have said.

Export / Inport of data

nidhelp21-Jul-05 23:21

nidhelp

21-Jul-05 23:21

Hi,
how do i export and import data to a database, thumbdrive, zipdrive etc.. (but first i got to create a database and i dono how to do dat)..

Thz a lot!

passing and recieving specific index of array

iramg21-Jul-05 22:59

iramg

21-Jul-05 22:59

hello
plz tell me how to pass a specific index of the array to a function and how to recieve that what will be function call code and function declaration code.
like if i want to pass array [1] element. so wht will be the passing and receiving code.
thanks

Re: passing and recieving specific index of array

MihirV21-Jul-05 23:20

MihirV

21-Jul-05 23:20

void FunctionCaller()
{
string [] ArrStr = new string[]{"str1","str2","str3"};
int [] ArrInt = new int[]{1,2,3,4,5};
MyFunction(ArrStr[1]);
MyFunction(ArrInt[2]);
}

void MyFunction(object ArrElement)
{
Console.WriteLine(ArrElement);
}

may be helpful to you Smile | :)

Mihir...

Check if a string doesn't starts with a caracter

anderslundsgard21-Jul-05 22:18

anderslundsgard

21-Jul-05 22:18

Well, how would you: check if a string doesn't starts with a caracter.

I've gladly take tips on good string searching/manipulating classes. I'm wellknown of StringBuilder...

_____________________________

...and justice for all

APe

Re: Check if a string doesn't starts with a caracter

AmmuRaj21-Jul-05 22:43

AmmuRaj

21-Jul-05 22:43

U means "string doesn't starts with a character" ?

If so,
if(!strName.StartsWith(ch))

Ammu

Re: Check if a string doesn't starts with a caracter

anderslundsgard21-Jul-05 23:25

anderslundsgard

21-Jul-05 23:25

But I like to check if it starts with a or b or c or.....

Don't really like to do this:

if (str.StartsWith("a")...)....
if (str.StartsWith("b")...)....
if (str.StartsWith("c")...)....
if (str.StartsWith("d")...)....
if (str.StartsWith("e")...)....

_____________________________

...and justice for all

APe

Re: Check if a string doesn't starts with a caracter

lovelylooney21-Jul-05 23:42

lovelylooney

21-Jul-05 23:42

private void txtFirstName_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)

if(txtbox1.Text.Length == 0)
{
if (!Char.IsLetter(e.KeyChar))
e.Handled=true;
}
}

The above code in will check for each key press and will only allow characters...You can modify the code to ur advantage...

Looney

Re: Check if a string doesn't starts with a caracter

AmmuRaj22-Jul-05 1:37

AmmuRaj

22-Jul-05 1:37

So u want to check whether the first character is alphabet or digit. Am I correct ????

Then,

char.IsLetter(str,0)

It will return true if the first character is a letter; otherwise false.

Rose | [Rose]

Ammu

Ammu

Read from a used file.

adonis.damian21-Jul-05 19:53

adonis.damian

21-Jul-05 19:53

Hello,
Using C#, how can I read from a file which is used be another process? Something like Notepad opens a file which is used be another process.

Thank you in advance,

adosun

Re: Read from a used file.

MihirV22-Jul-05 0:06

MihirV

22-Jul-05 0:06

hi
i think it is not possible to access file which is accessed by the another process..you will get access violation exception while accessing this file.

...but in a case, you open a text file in any editor e.g Notepad, WordPad you can access file coz what editor does is it access file and append it in to the control and close it. Smile | :)

Mihir...

Re: Read from a used file.

Dave Kreskowiak22-Jul-05 4:41

Dave Kreskowiak

22-Jul-05 4:41

If the file is opened DenyShareRead by the host process, you can't open it until the host closes the file, period. There's no way around this.

By deault, the FileStream object opens a file with FileShare.Read permissions. That means that any other process can open the file for reading while you have the file open.

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

Only one copy of application allowed to run

Anonymous21-Jul-05 19:13

Anonymous

21-Jul-05 19:13

How can I ensure that only one copy of my application (C#) runs?

(In technical terms - it may mean one process or one thread or something else?)

Thanks

Re: Only one copy of application allowed to run

Andrew Kirillov22-Jul-05 0:27

Andrew Kirillov

22-Jul-05 0:27

Don't you like to search here before ?

You can use mutex for it. There are a lot articles on the topic. Here is one of them [^].

Andrew

Re: Only one copy of application allowed to run

MihirV22-Jul-05 0:40

MihirV

22-Jul-05 0:40

hi
do this

public static void Main()<br />
{<br />
<br />
System.Diagnostics.Process[] process = <br />
 System.Diagnostics.Process.GetProcessesByName("YourAppName");<br />
<br />
if ( process.Length >= 2 )<br />
{<br />
MessageBox.Show("Application already running..");<br />
Appliction.End();<br />
}<br />
else<br />
{<br />
Application.Run(new Form1());<br />
}<br />
<br />
}

Mihir...

checking MSWord version

ppp00121-Jul-05 17:59

ppp001

21-Jul-05 17:59

Hi,

How to check the version of MSWord installed in the pc in C# ?
Any code samples ?

Thanks

How to setup a CDECL callback to C# Delagate

Think RS23221-Jul-05 15:01

Think RS232

21-Jul-05 15:01

I have a Win32 DLL that has a standard _stdcall (WINAPI) exports. I am able to call these fine from C#. One call in particular however has a callback to a CDECL function. How would I set that up? Following is the specific.

Win32 DLL Declaration for function in MyDLL.dll
extern "C" int WINAPI SpecialTimerFunction(int Val, int (*Callback)(int InVal))

C# Declaration
public class MyClass
{
public delegate int MyCallback(int InVal);

[DllImport("MyDLL.dll")]
public static extern int SpecialTimerFunction(int Val,MyCallback Callback);
}

How do I declare the delegate to ensure that the marshaller will understand that the callback is of type CDECL?

Thanks a million.
Berto

WCSC (Willies Computer Software Co)
http://www.wcscnet.com

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