Programmers Heaven Forums RSS Feed

Socket control

Fri, 09 May 2008 05:10:49 -0700

Socket control

Posted by today at 5:10 AM

Hi!

I would like to create an application, which well be inserted between the mail client (outlook express, or mozilla, etc) and a remote pop3 server. It is something like email scanners do. I want control the mail data. (actually it will be special a spam filter). I have searched google, but could not find any information, how to integrate an applicaton with the TCP data flow. I need only the basic concept.
Any help would be appriciated.

Thanx, have a nice day,
softman

Reversed Axis Direction???

Fri, 09 May 2008 04:57:44 -0700

Reversed Axis Direction???

Posted by today at 4:57 AM

Hi

I'm modelling a landscape in openGL but the X axis appears to have been reversed. As far as I know the axes are supposed to be laid out like so (positive values):

Y Z
| /
|/
'----X

however, in my model, the X axis is reversed.

Any ideas why this has happened and how I can correct it?

Thanks!

edit: it has occurred to me that possibly it is the z axis that is reversed and my idea of the axes was wrong..?

IDirect3DDevice9::Present

Fri, 09 May 2008 03:30:02 -0700

IDirect3DDevice9::Present

Posted by today at 3:30 AM

Hi everyone,

Here is the story. I am making an emulator which original system runs for 60 Hz displays. So I create a Direct3D device on fullscreen mode asking for a 60 Hz refreshing rate, I also use the D3DPRESENT_INTERVAL_ONE parameter to have the rendering synchonized with the VSync. And it looks pretty good.
Since the rendering consist mainly of displaying a 2d buffer with direct3d, the rendering function is pretty simple:

IDirect3DDevice9_BeginScene(d3ddev);
IDirect3DSurface9_LockRect(pMyOffscreenSurface, &d3dlr, 0, 0);
/* Here I copy my buffer to the offscreenSurface */
IDirect3DSurface9_UnlockRect(pMyOffscreenSurface);
IDirect3DDevice9_StretchRect(d3ddev, pMyOffscreenSurface, &srcRect, pRenderTarget, &dstRect, D3DTEXF_NONE);
IDirect3DDevice9_EndScene(d3ddev);

IDirect3DDevice9_Present(d3ddev, NULL, NULL, NULL, NULL);

Problem is that when I go to windowed mode, the frame rate drops for some reasons linked to the size of the window and the current display color mode.
Since I am a beginner in DirectX there is certainly something I miss, but I really wish I had the same quality in the windowed mode that I have in the fullscreen mode.

Could someone help me ?

Thanks a lot
Joe

An odd Dev-C++ Linker Error

Thu, 08 May 2008 22:32:10 -0700

An odd Dev-C++ Linker Error

Posted by yesterday at 10:32 PM

Hello programmers. =)

I'm trying to use Bloodshed's most recent Dev-C++ release (v. 4.9.9.2) to compile C++ programs that will run from Windows command prompt (MSDOS). However, I've been encountering an odd linker error, and I've been unable to find any references to it on the Web. Here is the code of my very simple test program:

#include <cstdlib>
#include <iostream>
using namespace std;

int main()
{
    cout << "Hello world!" << endl;
    
    return EXIT_SUCCESS;
}

This program compiles fine under the UNIX system we use for our C++ class. However, when I try to compile this code using Dev-C++, I'm given the following error:

[Linker error] undefined reference to `__cpu_features_init'
ld returned 1 exit status

I'm stumped. =/

Is there anyone who can explain this error to me and perhaps offer a solution?

manupulation using ADODB

Thu, 08 May 2008 20:45:03 -0700

manupulation using ADODB

Posted by yesterday at 8:45 PM

hello
I am beginner in visual basic 6, i am having problem in adding,saving and deleting records in vb using ms-access data base.

i don't know whether i am right or wrong. i am pasting my codeing below:

Dim con As New ADODB.Connection
Dim rs As New ADODB.Recordset

Private Sub Form_Load()
With con
.Provider = "Microsoft.Jet.OLEDB.4.0"
.ConnectionString = "D:\studata.mdb" (path to the database)
.Open
End With
rs.Open "select * from records", con, adOpenDynamic, adLockBatchOptimistic
End Sub

Public Sub fnDisplay()

Text1.Text = rs(0)
Text2.Text = rs(1)
Text3.Text = rs(2)
Text4.Text = rs(3)

End Sub

Private Sub Save_Click()
On Error Resume Next
rs.Save
Call fnDisplay
MsgBox "RECORD SAVED"
End Sub

Private Sub Add_Click()
On Error Resume Next
Text1.Text = ""
Text2.Text = ""
Text3.Text = ""
Text4.Text = ""
rs.AddNew
End Sub

Private Sub Del_Click()
rs.Delete
Call fnDisplay
End Sub

Plz tell me what to do..

All suggestion will be appreciated

How to plot the corrspoding points in two image?

Thu, 08 May 2008 19:16:47 -0700

How to plot the corrspoding points in two image?

Posted by yesterday at 7:16 PM

Mark some points in two images. And then we need to use line to connect the correspoding points. How to finish the above procedure using Matlab(or else tool)? Please see attachment.
Please help me! Thanks Thanks Thanks!

-----------
Thanks to your reading and writing.

080508-2.JPG (27698 bytes | downloaded 7 times)

ConnectionString

Thu, 08 May 2008 18:13:39 -0700

ConnectionString

Posted by yesterday at 6:13 PM

Hello!
I have just developed, as an assignment , a small conventional website, commonly used for “Log in “purposes. User enters the UserID and password. User ID is compares from the customer Table, to verify, if the name already exists in database. If yes, he is directed to main page.
Else he is directed to newuser Register page , for providing personal information . This information is added in the database table as a new recordset.

The code in index.aspx.vb file is as under.

Imports System.Data.SqlClient

Partial Class index
Inherits System.Web.UI.Page

Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load

End sub

Protected Sub Submit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Submit.Click
Session("Name") = txtusername.Text
Dim con As New SqlConnection(System.Configuration. ConfigurationManager.AppSettings("Zeedb"))

Dim dr As SqlDataReader
'Dim StudentID As String
Dim strSQL As String = "SELECT * FROM tblCustomer WHERE CustomerName = '" & txtusername.Text & "' and Password = '" & txtPassword.Text & "'"
Dim cmdSQL As SqlCommand
Try
con.Open()
cmdSQL = New SqlCommand(strSQL, con)
cmdSQL.ExecuteNonQuery()
dr = cmdSQL.ExecuteReader

If dr.Read Then
Response.Redirect("mainpage.aspx")
Else
Response.Redirect("index1.aspx")
End If

Catch ex As Exception
lblError.Text = ex.Message
Finally
con.Close()
End Try

End Sub

Protected Sub newuser_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles newuser.Click
Response.Redirect("register.aspx")
End Sub
End Class


The Customers file resides in database named “Zeedb “at a Local SQL server in a different directory within the same machine. Web server used is Local Host built-in within the same machine.

The problem I am facing is that when I debug the system, the build up succeeds. However, when data is entered in text boxes (User Name and Password) I receive an error message:

“The ConnectionString property has not been initialized”

As tried to search on MSDN and Google, it seems to be a very common mistake, but I could not find the remedy. The reason of the fault could not be identified.

Please help me, where id the oversight, which I cannot locate.
Thanks.
Abdul Hayee.

ADO SHAPE Help

Thu, 08 May 2008 17:27:29 -0700

ADO SHAPE Help

Posted by yesterday at 5:27 PM

Hi all.

Need some help with an syntax error with the ADO Shape command. I am adding featured to a Legacy VB6 application and I am trying to generate a hierarchy like this
Level 1
Data Set A
Data Set B
Data Set C
Data Set D

I can get it to work for data sets A,B, and C. When I add the shape command for Data set E, I get the very informitive Syntax error.

Code Snippet
strSql = "SHAPE {exec dbo.rxl_getTMSVersionTypes ?,?,?,?} as VersionTypes " & _
" APPEND ((SHAPE {exec dbo.rxl_getTMSPolicyVersions ?,?,?,?} as PolicyVersions " & _
" APPEND ({exec dbo.getTMSPolicyTransactions ?, ?} " & _
" relate PCH_VER_ID to PCH_VER_ID " & _
" ) as PolicyTransactions " & _
" APPEND ((SHAPE {exec dbo.getTMSVersionVehicles ?,?} " & _
" APPEND ((SHAPE {exec dbo.getTMSVehicleTransactions ?,?} " & _
" APPEND ({exec dbo.GetTMSCoverages ?} " & _
" relate VEH_ID to COV_VEH_ID, VEH_PCH_TRAN_ID to cov_veh_pch_tran_id) as coverages, " & _
" ({exec dbo.getTMSEndorsements} " & _
" relate veh_id to End_veh_id, veh_pch_tran_id to End_veh_pch_tran_id) as Endorsements) " & _
" relate PCH_TRAN_ID to VEH_PCH_TRAN_ID, veh_id to veh_id)) " & _
" ) " & _
" relate PCH_VER_CD to PCH_VER_CD, VER_EFF_DT to EFF_DT " & _
" ) as VersionSummary"

Thanks in advance

More Experimenting With JApplet KeyListener Wont Work

Thu, 08 May 2008 14:11:29 -0700

More Experimenting With JApplet KeyListener Wont Work

Posted by yesterday at 2:11 PM

Hi there.
It all looks good except that it's supposed to write out my key codes when i press them. The code marked in red wont trigger
Thanks for the help.
The SnakeWarPanel extends JPanel.

import java.awt.Color;
import java.awt.Container;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JComboBox;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;

public class SnakeWarApplet extends JApplet implements ActionListener,KeyListener{
    int width,height;
    
    Container content;
    JComboBox cb1;
    JButton b1;
    
    public void init() {
    
        width=getWidth();
        height=getHeight();
    
        content = getContentPane();
        content.setBackground(Color.white);
        content.setLayout(null);
    
     	String[] options = { "1 players", "2 players", "3 players", "4 players" };
    	cb1 = new JComboBox(options);
    	cb1.setSelectedIndex(1);	
    	cb1.setBounds(width/2-100,height/2-50,100,50);
    	cb1.setFocusable(false);
    	content.add(cb1);
    
    	b1 = new JButton("Start");
    	b1.setBounds(width/2,height/2-50,100,50);
    	b1.addActionListener(this);
    	content.add(b1);
    }
    public void actionPerformed(ActionEvent e){
    	System.out.println("ButtonPressed");
    	cb1.setVisible(false);
    	b1.setVisible(false);
    
    	SnakeWarPanel SWP=new SnakeWarPanel(cb1.getSelectedIndex()+1,width,heigh
t);
    	SWP.setBounds(0,0,width,height);
    	content.add(SWP);
    	SWP.addKeyListener(this);
    
    	repaint();
    }
    public void keyPressed(KeyEvent e)
    {
        System.out.println("P"+e.getKeyCode());
    }
    public void keyReleased(KeyEvent e)
    {
        System.out.println("R"+e.getKeyCode());
    }          
    public void keyTyped(KeyEvent e)
    {
        System.out.println("T"+e.getKeyCode());
    }
}

copy function

Thu, 08 May 2008 12:55:01 -0700

copy function

Posted by yesterday at 12:55 PM

use File::Copy;
mkdir '../test1';
mkdir '../test1/test2';
mkdir '../test3';

copy ( '../test1' , '../test3');

#why doesn't test2 get copied into test 3?

VSTO & Excel vlookup question

Thu, 08 May 2008 11:34:50 -0700

VSTO & Excel vlookup question

Posted by yesterday at 11:34 AM

I'm trying to use the vlookup function in VB.net, and I can't get it to work. In vba, this was simple, but I can't figure out how to call this function in VSTO. I think the problem is with the microsoft.office.interop.excel part. Help on this would be great, I'm struggling with pulling functionality from Excel into VSTO and .net. Thanks!

Private Function myLookup(ByVal value As String, ByVal aRange As Excel.Range, ByVal index As Integer, ByVal notexact As Boolean) As String

On Error GoTo ErrorHandler

myLookup = Microsoft.Office.Interop.Excel.WorksheetFunction.V Lookup(value, aRange, index, notexact)

If (IsError(myLookup) Or (Err.Number <> 0)) Then
myLookup = ""
End If
Exit Function

ASP.NET C# Crystal Reports Freelance Programmer

Thu, 08 May 2008 08:32:17 -0700

ASP.NET C# Crystal Reports Freelance Programmer

Posted by yesterday at 8:32 AM

Hello,

I have over 12+ years of experience in software development.

I am software developer looking for freelance or Full Time work, my skill sets:

.NET(ASP.NET / C# / VB.NET)
VB,
ASP (VBScript & Javascript),
SQL Server,
Access (VBA),
Excel (VBA),
Oracle
Crystal Reports &
SQL Reporting Service

I can work on migration projects, supporting exsisting project and looking out for new project.

waiting for your work.

sumeet.leo @ gmail.com or sumeet.leo @ hotmail.com

javascript that works in firefox but not IE

Thu, 08 May 2008 07:24:13 -0700

javascript that works in firefox but not IE

Posted by yesterday at 7:24 AM

Hello, I have tried to write a javascript. However, after i tested my script. I found out that it only works in firefox but not in IE. Does anyone have any idea that why is it like this?

dumbest question to date..

Thu, 08 May 2008 07:05:35 -0700

dumbest question to date..

Posted by yesterday at 7:05 AM

there are no stupid questions, just stupid people.. well, then i am a stupid person because i don't know sh*t about this stuff.. i am a graphic designer/ website creator.. i've made successful adult paysites over 10 years using basic html, frontpage 98, and ccbill.. question.. i now need a programmer with extensive database knowledge for a large scale project that i am launching.. i will hire and/or include this person in the business, if interested.. i need to know if i can design the site(graphics, pages, etc) now, then have the programmer integrate the functionality of the database applications at a later time? thanks, in advance..

Createobject on vista

Thu, 08 May 2008 03:57:33 -0700

Createobject on vista

Posted by yesterday at 3:57 AM

Hi,

Please find below my problem:

A Restricted user doesnot have privileges to edit HKLM\Software\Classes or HKCR section of registry, So i had modified my application installer to write in HKCU section of registry. Doing this I was able to make a clear install of my applicatio but it let me to a problem that a restricted user/power user can't run application, as it fails at "CreateObject"

Am i missing any more registry entry in Vista?

Any help will be appreciated!!

Flipbook

Thu, 08 May 2008 03:47:02 -0700

Flipbook

Posted by yesterday at 3:47 AM

Still looking for a good component 4 my website...
Please do help!

Createobject on vista

Thu, 08 May 2008 02:44:48 -0700

Createobject on vista

Posted by yesterday at 2:44 AM

How can you pass JSON objects from javascript to java applet?

Thu, 08 May 2008 02:17:22 -0700

How can you pass JSON objects from javascript to java applet?

Posted by yesterday at 2:17 AM

Hello, I've been frantically searching the web for this particular problem. It involves passing objects from javascript to an applet...

Say for example I have this code in javascript
<html>
<head>
<title>Test of passing javascript to java</title>

<script text="text/javascript" language="javascript">
function tryAlert()
{
var myJson = {"name":"ana","age":"19","gender":"female"};
document.json.getJson(myJson);//pass myJson to the method in the applet

}
</script>
</head>
<body>
<form name="test">
<input type="button" value="Send" onClick="tryAlert()">
</form>
</body>
</html>

//here is the java applet code
import java.applet.Applet;
import java.awt.*;
import javax.swing.*;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;
import org.json.JSONStringer;
import org.json.*;
public class testJson2 extends JApplet
{
public JSONArray arrvar;
public Object objvar;
public JSONObject o;
public String temp;
public JLabel label1,label2,label3,label4,label5;

public void init()
{

Container c;
c = getContentPane();
c.setBackground(Color.GREEN);
c.setForeground(Color.MAGENTA);
c.setLayout(new FlowLayout());
label1 = new JLabel("Passing json objects to applet.");
label2 = new JLabel();
label3 = new JLabel();
label4 = new JLabel();
label5 = new JLabel();
c.add(label1);
c.add(label2);
c.add(label3);
c.add(label4);
c.add(label5);
}

public void getJson(String obj)
{
try
{

this.o = new JSONObject(obj);
label2.setText("o.name= "+this.o.get("name").toString());
label3.setText("o.age= "+this.o.get("age".toString()));
label4.setText("o.gender= "+this.o.get("gender").toString());

}catch(JSONException je)
{
je.printStackTrace();
label3.setText("je= "+je);
}
}

}
Well, the problem is, it seems that JSON objects were not passed to the applet since it can't print the name age and gender. Please help me with this dilemma.

How to Update an xml file simultaneously from two applications

Thu, 08 May 2008 01:19:40 -0700

How to Update an xml file simultaneously from two applications

Posted by yesterday at 1:19 AM

Hello everyone,

I have an issue in working with xml files. i want to change the contents of an xml from two applications simultaneously.
this is my xml document
<?xml version="1.0" encoding="Windows-1252"?>
<OrderList>
<Order>
<Orderno>30</Orderno>
<Key>456</Key>
</Order>
<Order>
<Orderno>30</Orderno>
<Key></Key>
</Order>
</OrderList>

currently i have the code for update the contents
Dim XMLDom As New XmlDocument()
'//load your xml file
XMLDom.Load("c:\t2.xml")
Dim newXMLNodes As XmlNodeList = XMLDom.SelectNodes("/OrderList/Order/Orderno")

For Each newXMLNode1 As XmlNode In newXMLNodes
MsgBox(newXMLNode1.InnerText)
If newXMLNode1.InnerText = "31" Then
newXMLNode1.InnerText = "AS31"
End If

Next

XMLDom.Save("c:\t2.xml")
XMLDom = Nothing

its main problem is that i load the full document to XMLDom and finaly i overwrite the existing xml document,so i lost the data from the second application .
Can anyone please help me with this

with regards
rehna

Implementing shared/exclusive locking (readers/writer) lock

Wed, 07 May 2008 22:58:29 -0700

Implementing shared/exclusive locking (readers/writer) lock

Posted by on 7 May 2008 at 10:58 PM

Hi,
I am using semaphore to implement Single Writer Multiple Readers (Reader / writer) lock.
The problem is that semaphores are critical resources in linux systems, and there is a limit on the number of semaphores

that you can create.
So, after creating some semaphores, sometimes my application exceeds this limit, and I get an error like 'No space left on

device.'.

I have to reboot the system sometimes, to release the semaphores, if my application is terminated abruptly!

How should I implement readers/writers lock using something else than semaphore, which is scalable?

I don't need reader/writer locks across multiple processes. I just need to use them in multiple threads of my application,

which is a single process.
But I want a very scalable solution, say I want 500 locks through out my application daemon's lifetime.

I read in the link below that postgres also suffered the same problem, but there it is recommended that the limit should be

increased, which I don't want users to do.
http://www2.units.it/~nircdc/doc/postgres/kernel-resources.html

visual studio on WINCE

Wed, 07 May 2008 21:15:32 -0700

visual studio on WINCE

Posted by on 7 May 2008 at 9:15 PM

hi all can CE install visual studio 2008, if not wrong is cannot but is there anyway or similair program that I can install visual studio in CE?

Efficient way to store integer keys?

Wed, 07 May 2008 17:00:45 -0700

Efficient way to store integer keys?

Posted by on 7 May 2008 at 5:00 PM

Hi, I have to store sequences of integers, which have a value associated to the sequence. What is the most efficient way to store the keys? (I care first about access speed, memory would be second).

I've seen that tries offer an efficient way to store strings, but the tries I found use a char as the label for each arc/link. Is it better to use an int instead of converting the integers to chars?
e.g. given this sequence 100 200 3000
Using ints will make the trie more compact, because I don't have to break the ints into chars. However, there will be more arcs at each level and the searches could take longer, wouldn't it?

Thanks in advance!

SYSTEMTIME??

Wed, 07 May 2008 16:51:11 -0700

SYSTEMTIME??

Posted by on 7 May 2008 at 4:51 PM

I'm using SYSTEMTIME to get current time, but it doesn't return the Hour.

SYSTEMTIME st;
GetSystemTime(&st);

DWORD hours = st.wHour;
DWORD minutes = st.wMinute;

My current time is 4:50pm, and it returns 0:50pm. The hour doesn't show anything. Anyone knows why?

A very useful Website

Wed, 07 May 2008 16:31:33 -0700

A very useful Website

Posted by on 7 May 2008 at 4:31 PM

The following is a link to a Website called Delphi Basics.
The info is very well presented and easy to follow.

It is also downloadable as a Windows application if you prefer the info without having to websurf each time.

I hope you find this useful.

DBEdit problem with Floating Numbers

Wed, 07 May 2008 16:26:02 -0700

DBEdit problem with Floating Numbers

Posted by on 7 May 2008 at 4:26 PM

I have a situation that uses 5 DBEdit boxes. 4 of these boxes are involved with Integer data, while the fifth requires decimal places and is therefore involved with double numbers.

The calculations that occur need to be updated after each key press, which means that the data gets posted on every keypress from the DBEdit that has the current focus, after which the calculation functions correct the four fields.

This works fine with the integer numbers. However, with the double numbers, there is a problem.

If a solid number is typed, for example :- 4325

Everything is fine, but as soon as the '.' is pressed to insert a decimal number, after posting, the decimal is removed since the display rounds off the number since there is zero to the right of the decimal point.

In order to display the number as a fixed decimal number, the number needs to be formated as a string and then DBEdit.Text := FormatedString.

So if I reformat the data after post and send it to the DBEdit text, once focus is again on DBEdit, the cursor is to the left of the data.

Since posting occurs onkeypress, the whole situation does not work.

I managed to get a perfectly workable solution with an Edit box, but there is one issue there that I can not resolve.

The data in the DBEdit boxes is aligned to the left when focused and to the right when focus is elsewhere, while the Edit Box, the alignment is to the left while focused and remains to the left when focus is elsewhere.

I could not find any way to set either the DBEdit box or the Edit Boxes alignment so that they all are viewed the same.

So, if anyone can assist either in resolving the DBGrid decimal point issue, or alternatively assist with the alignment issue, I would be grateful.

Thank you for reading this long saga :)