Let Share Codes

Hi guys,
I have been nursing the idea of starting my blog for some times now but I have been very busy doing office work.
I have seen wonders that have been done in nairaland by developers. I feel its high time we truly help each other. I created this forum to serve as a forum where a developer can meet and help other developers. Mainly
i. Lets share general codes: I mean keep your business rules and share codes that are needed almost everywhere;
ii. Post any question(s) bothering you and possibly I or any other developer might find an answer to it;
iii. Lets share concepts and ideas.

Warning: I am MS developer, meaning I may be able to assist on VB, VB.NET, C, C++, C#, OOP only. Notwithstanding, I have done a little JAVA  in the past (or I may ask some colleagues in my office).  I may also assist on Javascript, PHP, etc.

So, LET US SHARE.

Good Luck.

@xanadu, welcome.

Check this:
Topic: Classes or Linear Programming

It is very interesting how some developers have neglected the use of classes these days. I have worked with some organizations that have never heard of classes one way or the other. Let me use this opportunity to state the advantages of using classes (the ones I can remember):

i. Class encapsulates;
ii. Makes your programming easier to maintain;
iii. Promotes readability;
iv. Oh sorry, Class is the core central  of OOP: add any advantage that you think OOP has.

Please Note that all my postings in this forum shall come in classes (method, interface, property , ).

Good luck.

Hi all,
I have been writing aspx some times now and I discovered that I have been writing the same function every time, so I decided to put it in a class and just call the function from the class whenever I need the function.
Here is a class that helps you to upload image file e.g. passport (u don't need to bother yourself everytime doing the same ):


public class UploadManager
{
public bool UploadFile(ref FileUpload f, ref string message)
{
    if (!f.HasFile)
    {
        message = "No file is selected.";
        return false;
    }
    HttpContext context = HttpContext.Current;
    string sessionid = context.Session.SessionID;
    string fileExtension = Path.GetExtension(f.FileName).ToLower();
    string[] allowedExtensions = new string[] { ".jpeg", ".jpg" };
    int totallegth = allowedExtensions.Length;
    for (int counter = 0; counter < totallegth; counter++)
    {
        if (fileExtension == allowedExtensions[counter])
        {
            Bitmap myImage = new Bitmap(120, 140);
            try
            {
                string path = context.Server.MapPath("~/UploadedImages/");
                string filename = sessionid + DateAndTime.get_Now().Millisecond.ToString() + ".jpg";
                string fullpath = path + filename;
                f.PostedFile.SaveAs(fullpath);
                myImage = new Bitmap(fullpath);
                if (((myImage.Width >= 110) & (myImage.Width <= 130)) & ((myImage.Height >= 130) & (myImage.Height <= 150)))
                {
                    message = "~/UploadedImages/" + filename;
                    return true;
                }
                message = "Invalid Picture size! The Passport Photograph must be of size 120 X 140px";
                return false;
            }
            catch (Exception exception1)
            {
                ProjectData.SetProjectError(exception1);
                Exception ex = exception1;
                AppException.LogError(ex.Message);
                message = "Image could not be uploaded at the moment.";
                ProjectData.ClearProjectError();
                return false;
                ProjectData.ClearProjectError();
            }
            finally
            {
                myImage.Dispose();
            }
        }
    }
    message = "Invalid Picture format! The Passport Photograph must a jpeg.";
    return false;
}

}

Usage:
 UploadManager um = new UploadManager();

if (um.UploadFile(this.filPassport, message) )
{
                this.imgPassport.ImageUrl = message;
                ViewState("picPath") = message;
 }
else
{
   this.lblErrorMesage = message;
}

Enjoy and please let me know if u have any problem using the class.

Good luck.
           

Sorry Fikzy,
will get back to u before end of work today. i have been very busy lately.

@Smart K
some how, this post is not active. why? or is there another code sharing link on this forumn where developers hang out?, 

Guys, check out this link.

Title: How to: Make Thread-Safe Calls to Windows Forms Controls

It explains how to check if the call to a thread is from the current Thread or not,
it also explained how to update UI using the BackgroundWorker RunWorkerCompleted(, ) and ProgressChanged(, ) metchods.

http://msdn2.microsoft.com/en-us/library/ms171728(VS.80).aspx

@miclad

PHP scripts to do WHOIS, check this out;
http://www.hotscripts.com/PHP/Scripts_and_Programs/Networking_Tools/Whois/index.html

To get elementry tutorial on php, check this out;
http://www.phpfreaks.com/tutorial_cat/8/Basics-&-Beginner-Tutorials.php

PHP is interesting and easy to lean.

all the best,

In the Spirit of Sharing code, anyone know how to write and able to share code for an ASP.NET/AJAX Image Preloader that basically allows users to select picture user would like to upload into web album and preview the image at the same time without necessarily uploading the picture??? I started working on one but since I am not really a Javascript guru, I was wondering if someone has already figured this out and would like to share.


KoboJunkie

@seluvsmayo
I am not conversant with delphi  but you can get tutorials corvering various aspect of Delphi from; http://www.delphibasics.co.uk/

@seluvsmayo

Check this link out;
http://delphi.about.com/od/beginners/Getting_Started_with_Delphi.htm

and this;
http://delphi.about.com/od/turbodelphitutorial/Turbo_Delphi_Tutorial_Free_Online_Beginner_Delphi_Tutorial.htm

or this;
http://www.xcalibur.co.uk/training/Delphi2005/

Best Regards.

    can i incorporate this code segment on a form in vb6.0 such that it enables me load pictures from a database?  e.g. ms access 

  wow, now this is getting even much more interesting. I've heard of stored procedures but don't know what they are and how they are used/implemented on vb 6.0 since I've never used them. I need more lectures on these areas _{stored procedures} and also on modules/classes/collections etc  Thanks

Hi guys,
I was doing a project recently and I needed to interact with server without post back. Guess wath I did: I created a webservice and called the webservice from client with javascript and i could now upate my UI with javascript. isn't that cool. I guess i may share some of the codes with u.
Note: this is for aspnet developers (the sample code is c# though simple enough to convert).

i. Create a webservice called MyService
using System;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.Protocols;

/// <summary>
/// Project:    Byaxiom  Service
/// Company:    Byaxiom Solutions Limited, http://www.byaxiom.com
/// Author:     I. A. Rahman
/// Created:    October 2007
/// </summary>
[WebService(Namespace = "http://www.byaxiom.com/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.Web.Script.Services.ScriptService()]
public class MyService : System.Web.Services.WebService
{
    public MyService()
    {
        //Uncomment the following line if using designed components
        //InitializeComponent();
    }

    public string doSomething(string tabID)
    {
      string retVal = "Up Smart.";//do your business logics here
        return retVal;   //return back to javascript
    }
}

ii. create an aspx code to consume the guy

      


<%@ Page Language="C#" AutoEventWireup="true" CodeFile="default.aspx.cs" Inherits="default" %>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Poolsol Portal 1.0</title>
    <link href=", /stylesheets/main.css" rel="stylesheet" type="text/css" />
    <link href=", /stylesheets/content.css" rel="stylesheet" type="text/css" />
    <script type="text/javascript" language="javascript" src=", /scripts/moduleProcess.js"></script>

<script type="text/javascript" language="javascript" >
function doSomethingFromWebService(action){       
        MyService.doSomething(action, doSomethingComplete, doSomethingError, doSomethingTimeOut);             
    }


function doSomethingComplete(arg)
      {
         document.getElementsByID("<%ReturnTextBox.ClientID %>").value=arg;         
      }
function doSomethingTimeOut(arg)
      {
         alert("timeOut has occured");
      }
function doSomethingError(arg)
      {
         alert("error has occured: " + arg._message);
      }
            
</script>
</head>

<body>
    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server">
            <Services>
                <asp:ServiceReference Path="~/MyService.asmx" />
            </Services>
        </asp:ScriptManager>
        <table border="0" width="100%" style="border-collapse: collapse" id="mainTable">
            <tr>
                <td id="master_header_left" >&nbsp;<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="doSomethingFromWebService(1)" />
                    <asp:TextBox ID="ReturnTextBox" runat="server"></asp:TextBox></td>
            </tr>
</table>
</form>
</body>
</html>

SO, GOOD LUCK.

[b] hey people, hw r yall doin? must commend the guy that started this blog,  it seems every body in this blog is too advanced 4 me. is there any other blog where the young developers can meet? i've just started studyin Java, got a supposed to be compiler but i don't know hw to test what i've studied. got it installed in my system though, but dnt knw hw to use it. can any body help? will be mo than grateful,  [b]

DOT NET: Anyone looking for ways to avoid page refresh re-sending your data. Check out
http://jarednevans.typepad.com/technoblog/2005/01/jareds_techno_b.html

you don't know how to use your java compiler?

install JDK (java development kit), set the path, and then go to cammand prompt, browse to
the folder where you hava your source code, and use the command "javac".
for example if your code is named wolf.java and it is in the root directory of your hard disk c.
then at command promt. type "cd\".
you will have something like this.  C:\>
then type "javac Wolf.java"
you will have "C:\>javac Wolf.java"
if your code contains no error. it will reurn to C:\>
then a class file will be generated. i.e Wolf.class
execute it by typing "java Wolf"
you will have C:\>java Wolf

the class file will be executed.

I do hope i've been able to solve your problem.