Problem with windows service!! - C# Discussion Boards

Alan Balkany19-Oct-09 5:12

19-Oct-09 5:12

A couple of suggestions...

It takes a lot longer to process doubles than ints. Can you use ints for pixels?

A good algorithm for discovering classifiers is the ID3 algorithm (http://en.wikipedia.org/wiki/ID3_algorithm[^]). It analyzes your training set and automatically produces a decision tree that will classify a new case. Each branch of the decision tree will compare a feature (in this case a pixel) of the new case with a threshold.

Re: Code optimization

tvbarnard19-Oct-09 5:31

tvbarnard

19-Oct-09 5:31

Oh yes, already did that Smile | :)

Thanks, will have a look at the ID3. Unfortunately I'm running out of time, so can't change or add too much code.

tvb

Winpcap Wpcap.dll packet.all

Archy_Yu18-Oct-09 1:36

Archy_Yu

18-Oct-09 1:36

what is their functions? I am completely confused.
When sending arp message in LAN,Winpcap is very nessecery?
What is about it?
any one help me?
thanks in advance!

Re: Winpcap Wpcap.dll packet.all

DaveyM6918-Oct-09 1:59

DaveyM69

18-Oct-09 1:59

I've had a look at the documentation on their site, and it appears to be all C++ not C#. You will need to write a wrapper and use PInvoke to call the functions and write equivalent data structures etc so that data can be marshalled correctly, unless there is already a .NET wrapper for it such as this[^].

Dave

Generic BackgroundWorker - My latest article!
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: Winpcap Wpcap.dll packet.all

brickner26-Feb-10 6:20

brickner

26-Feb-10 6:20

There is a nice WinPcap wrapper you should try to use.
It uses C++/CLI instead of PInvoke, which has much better performance.

It is called Pcap.Net and available here:
http://pcapdotnet.codeplex.com

Establish several VPN connections with C# ?

Mohammad Dayyan18-Oct-09 1:22

Mohammad Dayyan

18-Oct-09 1:22

Hi guys.
I have a VPN connection to the Internet with 14kb/s. It's too low, but I can setup several VPN connections and it causes the speed increase ( 14kb/s per each VPN connection )
Now I'm going to establish several VPN connections to the Internet and configure them with C# !
Could you please guide me, how I can do it ?
Thanks.

Go to next page by scrolling in CrystalReport

C#_Programmer18-Oct-09 1:21

C#_Programmer

18-Oct-09 1:21

can i go to next page in a multi pages crystalreport without using next page button just scrolling down and next pages will come one by one.....how?????

Problem with windows service!!

Nafiseh Salmani18-Oct-09 1:06

Nafiseh Salmani

18-Oct-09 1:06

I run D:\Program Files\Microsoft Visual Studio 9.0\VC>Installutill.exe C:\Winservice\Release\LOG.exe to install windows service ,but The following problem occurred:

The Rollback phase completed successfully .

The transacted install has completed.
The installation failed, and the rollback has been performed.

------------
the installer class is as below:

public partial class Installer1 : Installer
    {
        //ICCIMLOGService
        ServiceInstaller ITServersLOG;
        ServiceProcessInstaller ICCIMProcessInstaller1;


        public Installer1()
        {
          
                        InitializeComponent();
                        ITServersLOG = new ServiceInstaller();
                        ICCIMProcessInstaller1 = new ServiceProcessInstaller();
                        //process.Account  = ServiceAccount.LocalSystem;
                        ICCIMProcessInstaller1.Account = ServiceAccount.LocalService ;
                        // Service will have Start Type of Manual
                        ITServersLOG.StartType = ServiceStartMode.Manual;
                        ITServersLOG.DisplayName = "ICCIMLOGService";
                        ITServersLOG.ServiceName = ITServersLOG.DisplayName;
                        Installers.Add(ITServersLOG);
                        Installers.Add(ICCIMProcessInstaller1);
               
        }
    }

how can i solve it?!! please help me!! D'Oh! | :doh:

how to searche in datagrid

hadidehghani17-Oct-09 23:33

hadidehghani

17-Oct-09 23:33

how to searche in datagrid word to word

Re: how to searche in datagrid

dan!sh 17-Oct-09 23:47

dan!sh

17-Oct-09 23:47

Does this[^] helps?

It's not necessary to be so stupid, either, but people manage it. - Christian Graus, 2009 AD

how to handle business layer validation error in presentation layer ?

hdv21217-Oct-09 23:31

hdv212

17-Oct-09 23:31

Hi i've use TableAdapter (typed dataSet) in my app, i extent my business layer to validate some information. when data is not valid then throw an exception.
now i want to handle this error in presentation layer. for example display error value in red color in datagridview, but i don't know how to do that.
can anybody help me to handle it in presentation layer ?
thanks

Re: how to handle business layer validation error in presentation layer ?

dan!sh 17-Oct-09 23:54

dan!sh

17-Oct-09 23:54

What information are you passing with the exception back to the presentation layer? I suppose there is any unique identifier that can help you identify the row having faulty data. Then, using Cells.Style property, you can set the fore color of the cell.

It's not necessary to be so stupid, either, but people manage it. - Christian Graus, 2009 AD

date format

Thaer Hamael17-Oct-09 22:20

Thaer Hamael

17-Oct-09 22:20

hello

i want to ask, how i can get the current date format?

thx

Thaer

Re: date format

DaveyM6917-Oct-09 22:34

DaveyM69

17-Oct-09 22:34

System.Threading.Thread.CurrentThread.CurrentCulture.DateTimeFormat.FullDateTimePattern;

Check out the other properties of DateTimeFormat - there's plenty available.

Dave

Generic BackgroundWorker - My latest article!
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: date format

Eddy Vluggen18-Oct-09 0:37

Eddy Vluggen

18-Oct-09 0:37

Click "Start", "Control Panel", "Regional and Language Options". You'll find a Short Date format[^] and a Long Date format[^].

I are Troll Smile | :)

Lock Access DB from C#

JollyMansArt17-Oct-09 18:43

JollyMansArt

17-Oct-09 18:43

I need to know how to go a bout locking the MS Access Applications Database via a C# Application.
I found this but this is vba reference not c#.
I will research more in the morning I wanted to see if anyone else know what the best way to go about handling this.

http://www.databasedev.co.uk/disable_shift_bypass.html[^]

Re: Lock Access DB from C#

JollyMansArt18-Oct-09 7:37

JollyMansArt

18-Oct-09 7:37

is there a way I can pass vba code to a ms access database from c# application to disable the Lock Access DB. I can find VBA code for ms access but I do not know how to do this from C#, so I can lock the file durring the copy process.

Importing excel to datagrid ....

nassimnastaran17-Oct-09 18:28

nassimnastaran

17-Oct-09 18:28

Hi all !
i want to import excel data to a datagrid for e.g. the first sheet . (i don't want to use any database (such as .mdb file or sql )) . how can i do it ?
thanks fo rany help !

Re: Importing excel to datagrid ....

dan!sh 17-Oct-09 21:28

dan!sh

17-Oct-09 21:28

You can do this by creating an OleDb connection to the excel file and then executing a select query on it. This would give you the excel data which you can use to populate the datagrid. You can find the connection string for this at ConnectionStrings[^].

It's not necessary to be so stupid, either, but people manage it. - Christian Graus, 2009 AD

Re: Importing excel to datagrid ....

nassimnastaran17-Oct-09 22:35

nassimnastaran

17-Oct-09 22:35

thanks ,
i use this :

OleDbConnection theConnection = new OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0;data source=c:\\test.xls;Extended Properties=Excel 8.0;");
            theConnection.Open();
            OleDbDataAdapter theDataAdapter = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", theConnection);
            DataSet ds = new DataSet();
            DataTable dt = new DataTable();
            theDataAdapter.Fill(dt);
            dataGrid1.DataSource = dt.DefaultView;

but in it will show onlt the title of "F1" and "F2" in DataGrid , do the data of [Sheet1$] excel File .

Re: Importing excel to datagrid .... [modified]

dan!sh 17-Oct-09 23:06

dan!sh

17-Oct-09 23:06

~~What is F1 and F2? Just check the data in the file and the one in the table you are binding with the grid.~~

Do you have any data in the file? Just inspect your datatable and match it with the file.

It's not necessary to be so stupid, either, but people manage it. - Christian Graus, 2009 AD

modified on Sunday, October 18, 2009 5:24 AM

Re: Importing excel to datagrid .... [modified]

nassimnastaran18-Oct-09 5:13

nassimnastaran

18-Oct-09 5:13

thanx , ...
now ...
i want to filter some rows have the code of "91" and "90" for i.e. in the field of "A" :
so , I added manually , A column in the DataGridView , name "Column1" . now when i import the excel file to this datagridview , the cell rows that have the value of for e.g. 90 and 91 , insert a value for instance 1 , the value of 100 and 101 , insert 2 and so on .
How can i do this ...
(excuse me for my bad english !)
thanx for help !

modified on Tuesday, October 20, 2009 4:04 AM

Generics and the == operator.

C^aptainS^eeS^harp17-Oct-09 18:02

C^aptainS^eeS^harp

17-Oct-09 18:02

When I was designing my type, I forgot that I can't even do a simple comparison between two of the same generic types. There has got to be a way don't you think?

I am working on a simple game where a reusable base class CellMap take a generic type. There is only one minor glitch that I need to take care of before it is completed and ready to be built on. I need to be able to compare two TCells to see if they have the same internal state. I have googled around and have seen some complex examples about how to mimic the functionality of operator overloading but those examples are too messy. All I need is to compare the internal state. What do you think is the best way to go about this?

Note that I only need the comparison in one line in one method, its just one little line of code that is holding me back. That line of code is commented out. I included surrounding code so you can see the context in which it is in.

class CellMap<TCell>
{

...

public void SetMap(TCell[][] newMap, bool redrawAll)
{
  CheckIncomingMap(mapWidth, mapHeight, newMap);

  if (!redrawAll)
  {
    for (ushort y = 0; y < mapHeight; y++)
    {
      for (ushort x = 0; x < mapWidth; x++)
      {
        //I need to compare these two TCells
        //if (newMap[x][y] == bufferMap[x][y]) continue;

        bufferMap[x][y] = newMap[x][y];
        changedCells.Enqueue(new CellData(x, y, newMap[x][y]));
      }
    }
    CommitBuffer(false);
  }
  else
  {
    for (ushort x = 0; x < mapWidth; x++)
      newMap[x].CopyTo(bufferMap[x], 0);
    
    CommitBuffer(true);
  }
}

...

}

Fall of the Republic[^]

Re: Generics and the == operator.

N a v a n e e t h17-Oct-09 19:09

N a v a n e e t h

17-Oct-09 19:09

CaptainSeeSharp wrote:
I forgot that I can't even do a simple comparison between two of the same generic types. There has got to be a way don't you think?

Your best bet would be to implement IEquatable(T) or similar interfaces on the cell class and add constraint to CellMap class so that it accepts a cell type that implements only IEquatable(T). You can use the Equals() method to check the equality.

Smile | :)

Best wishes,
Navaneeth

Re: Generics and the == operator.

DaveyM6917-Oct-09 21:45

DaveyM69

17-Oct-09 21:45

Three options that spring to mind.

The first is what Navaneeth suggested:

class CellMap<TCell> where TCell : IEquatable<TCell>
{
    public void SetMap(TCell[][] newMap, bool redrawAll)
    {
        // ...
       /if (newMap[x][y].Equals(bufferMap[x][y])) continue;
        // ...
    }
}

The second is similar but a different contraint

class CellMap<TCell> where TCell : class
{
    public void SetMap(TCell[][] newMap, bool redrawAll)
    {
        // ...
        if (newMap[0][0] == newMap[0][1]) continue;
        // ...
    }
}

The last option is to implement a base class that all TCells must derive from:

class CellMap<TCell> where TCell : CellBase
{
    public void SetMap(TCell[][] newMap, bool redrawAll)
    {
        // ...
        if (newMap[0][0] == newMap[0][1]) continue;
        // ...
    }
}
class CellBase
{
    // ...
}

I would prefer the last option as I then know how the == operator is implemented.

Dave

Generic BackgroundWorker - My latest article!
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)

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