C# Discussion Boards - CodeProject

Re: Combobox problem

Gareth H8-Jul-08 23:52

Gareth H

8-Jul-08 23:52

You are always returning the first row...

int count=0, b=0;
dr=ds.Tables[0].Rows[b];
comboBox1.Items.Add (dr[1].ToString());

Regards,
Gareth.

(FKA gareth111)

Re: Combobox problem

Vibin Venugopal9-Jul-08 0:55

Vibin Venugopal

9-Jul-08 0:55

Thanks for the reply
Please guide me on what i should include to get all the data in that particular column.

Re: Combobox problem

Kjetil Svendsen9-Jul-08 2:34

Kjetil Svendsen

9-Jul-08 2:34

Hi.

You should databind:

Combobox1.DataSource = ds.Tables[0];
Combobox1.DisplayMember = "Column name for column to display";
Combobox1.ValueMember = "Column name for ID column";

Kjetil

Re: Combobox problem

Vimalsoft(Pty) Ltd9-Jul-08 3:02

Vimalsoft(Pty) Ltd

9-Jul-08 3:02

firstly you are using a reader with a dataset and that confuses more.
if you want to retrieve what is in the command object and in future you won't manipulate the data, you should use only a datareader.so you have combined dataset and a datareader. your code above can be written like this

OleDbConnection con=new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=D:\\JET PRINT LIMITED\\JET PRINT LIMITED.mdb");
OleDbDataReader dr; 
OleDbCommand comm = new SqlCommand(); 
comm.Connection=con;
comm.CommandType=CommandType.Text;
comm.CommandText = "select * from STOCKDET";

con.Open();
 
dr=comm.ExecuteReader();

con.Close();

comboBox1.Datasource=dr;

MessageBox.Show("data into Combobox successfuly!!!");

MessageBox.Show("Connected successfuly!!!");

Hope it helps

Vuyiswa Maseko,

Sorrow is Better than Laughter, it may Sadden your Face, but It sharpens your Understanding

VB.NET/SQL7/2000/2005
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vuyiswam@tshwane.gov.za

How to detect all usb device removal?

lovnin8-Jul-08 23:12

lovnin

8-Jul-08 23:12

I'm trying to make a program what can let me know when a USB device is removed from a system. If anyone has any ideas or help that would be
great!

Thanks in advnace,

Virtual memory problem

B!Z8-Jul-08 22:25

B!Z

8-Jul-08 22:25

hello

I m getting an error "Virtual memory is to low"; while running my real-time application that is developed in C#.In our application, we are capturing the Live video and transmitting on LAN as well. IS IT ANY hARDWARE PROBLEM

B!z

Re: Virtual memory problem

leppie8-Jul-08 22:35

leppie

8-Jul-08 22:35

B!Z wrote:
IS IT ANY hARDWARE PROBLEM

No, your application is probably causing a memory leak. Monitor it with Process Explorer.

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Re: Virtual memory problem

S. Senthil Kumar8-Jul-08 23:03

S. Senthil Kumar

8-Jul-08 23:03

Also check the max page file size (My Computer -> Properties -> Advanced -> Performance -> Settings -> Advanced -> Virtual Memory) and see if you are close to that limit (Task Manager -> Performance -> PF Usage).

Regards
Senthil [MVP - Visual C#]
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Re: Virtual memory problem

Alan Balkany9-Jul-08 4:55

Alan Balkany

9-Jul-08 4:55

It's helpful to call the Dispose () method on large objects (like bitmaps) that your program no longer needs. This allows .NET to use memory more efficiently.

Also see the standard dispose pattern. Here's a good discussion of it: http://www.codeproject.com/KB/dotnet/idisposable.aspx[^]

Whats wrong with DebuggerDisplay in Visual Studio 2008

MarkPhB8-Jul-08 22:05

MarkPhB

8-Jul-08 22:05

Hi, i discoverd the DebuggerDisplayAttribute don't work in Visual Studio 2008, at leat in mine.

In Visual Studio 2005 did that work

[DebuggerDisplay( "{FirstName} {LastName}" )]
class Person {
   public String FirstName { get; set; }
   public String LastName { get; set; }
}

i searched for that problem already but i didnt found something about that.

That why my question: Can you acknowledge that bug ?

Re: Whats wrong with DebuggerDisplay in Visual Studio 2008

leppie8-Jul-08 22:32

leppie

8-Jul-08 22:32

MarkPhB wrote:
In Visual Studio 2005 did that work

I noticed that too, personally I just override ToString() Smile | :)

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Re: Whats wrong with DebuggerDisplay in Visual Studio 2008

MarkPhB8-Jul-08 22:45

MarkPhB

8-Jul-08 22:45

Ok and how do we inform Mircosoft about that bug ?

Re: Whats wrong with DebuggerDisplay in Visual Studio 2008

leppie8-Jul-08 22:49

leppie

8-Jul-08 22:49

IIRC: connect.microsoft.com

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How To Use HASP Device Security

Thaer Hamael8-Jul-08 21:46

Thaer Hamael

8-Jul-08 21:46

Hi All
I wount to use the HASP Security Device By Using C#.Net .
But I Dont Know How i Can Use It .
How can hellp me About US .
if Any body have Dll About it Sent it To Me .
Thanks for any body hellp me Rose | [Rose]

Thaer

Re: How To Use HASP Device Security

leppie8-Jul-08 22:31

leppie

8-Jul-08 22:31

Google gave me this answer: http://www.aladdin.com/hasp/contribute/default.aspx[^]

First entry looks like a .NET assembly for it.

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Problem using DllImport when importing MFC DLLs

James848-Jul-08 21:33

James84

8-Jul-08 21:33

I have declared an internal class to store the functions of the MFC DLL

internal static class Translate
{
//Importing unmanaged Translation DLL
#region Translation DLL
[DllImport("ECTalc.dll", ExactSpelling = false, EntryPoint = "EC_newInstance")]
public static extern int EC_newInstance();
[DllImport("ECTalc.dll", ExactSpelling = false, EntryPoint = "EC_initSys")]
public static extern int EC_initSys();
[DllImport("ECTalc.dll", ExactSpelling = false, EntryPoint = "EC_quit")]
public static extern void EC_quit();
[DllImport("ECTalc.dll", ExactSpelling = false, EntryPoint = "EC_destroyInstance")]
public static extern void EC_destroyInstance();
#endregion
//endregion

}

After which at a point, I have these two statements:
Translate.EC_newInstance();
Translate.EC_initSys();

However when my program loads, Translate.EC_newInstance(); is able to load but not Translate.EC_initSys();
The given error is as follows : "Error reading system data files. Please reload the files."
Could anyone enlighten me on this problem?

Re: Problem using DllImport when importing MFC DLLs

leppie8-Jul-08 22:29

leppie

8-Jul-08 22:29

Sounds like a path or something is not setup correctly. Either way, the issue seems to come from the ECTalc.dll, so ask the authors of that what the issue is.

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Re: Problem using DllImport when importing MFC DLLs

James849-Jul-08 17:59

James84

9-Jul-08 17:59

Hi there,

Yup I managed to solve it already. The problem lies in the configuration of the DLL when i approached the author. Thanks for your help. Much appreciated.

Global Assembly cache

Pankaj Garg8-Jul-08 21:09

Pankaj Garg

8-Jul-08 21:09

I created a class library project dll , i wanted to add this dll in the windows/assembly folder for the purpose of making it public assembly.
For that , i created a strongname key file , then i added that file information in the assembly file of the classs library project dll.and afterwards i build the project and finally i wrote the following syntax
gacutil -i "dll path"
this added the dll in the assembly folder.
now whenever i try to add the reference of the dll in the new project
should i get my dll (which is now in the assembly folder) in the dialog box of add reference .

If you have an apple & I have an apple and we exchange our apples, then each of us will still have only one apple but if you have an idea & I have an idea and we exchange our ideas, then each of us will have two ideas!

Re: Global Assembly cache

leppie8-Jul-08 22:27

leppie

8-Jul-08 22:27

Pankaj Garg wrote:
now whenever i try to add the reference of the dll in the new project
should i get my dll (which is now in the assembly folder) in the dialog box of add reference .

Yes.

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Re: Global Assembly cache

N a v a n e e t h8-Jul-08 22:28

N a v a n e e t h

8-Jul-08 22:28

If it is deployed to GAC, you will get it in the add reference window.

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

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Re: Global Assembly cache

PIEBALDconsult9-Jul-08 15:19

PIEBALDconsult

9-Jul-08 15:19

Pankaj Garg wrote:
in the dialog box of add reference

I always use the Browse or Projects tab to get the DLLs I write, whether in the GAC or not.

How to develop Application to control Printer in C#

$unil Dhiman8-Jul-08 21:08

$unil Dhiman

8-Jul-08 21:08

Hi,
I need to develop an applicaion to control over printer,
It should support-
Print Test Page
Get User name
Get IP Address / system name
Get Printer status
Current Printed page count
Toner Status etc.

Is this possible to develop this application using Printer Job Language (PJL) ?

your quick help is appreciated.

Thanks.
Sunil

Re: How to develop Application to control Printer in C#

leppie8-Jul-08 22:25

leppie

8-Jul-08 22:25

Funny how everyone wants to do PJL all of a sudden...

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Urgent information required for PJL (Printer job language)

Rajesh_K_Sharma8-Jul-08 20:22

Rajesh_K_Sharma

8-Jul-08 20:22

Hi I would like to develop an application for printer using Printer Job Language .I am new in this domain. So, I would like to know that answers of the following questions.
1. Can I develop this application in C# using PJL
2. If yes, then how can I send command to printer and how can I get response?
3. Is Hp p2015 printer support PJL?

Please send me any fruitful link or reference so that I can easily develop this application

Regards
Rajesh

rajesh

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