NinethSense oWnZ mE!: Praveen’s drawing book

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Wed
26
Sep '07

Reverse text as you type

Part of PraVeeN's adventure in C#

Time pass ;) 

 
		public string Reverse(string x)
		{
			char[] charArray = new char[x.Length];
			int len = x.Length - 1;
			for (int i = 0; i < = len; i++)
				charArray[i] = x[len-i];
			return new string(charArray);
		}
 
 
		private void txtBox1_KeyUp(object sender, System.Windows.Forms.KeyEventArgs e)
		{
			textBox2.Text = Reverse(textBox1.Text);
		}

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'

Reorder listbox items with JavaScript and ASP.NET

Part of PraVeeN's adventure in VB.NET, ASP.NET

Default.aspx: 
 
< %@ Page Language=“VB” AutoEventWireup=“false” CodeFile=“Default.aspx.vb” Inherits=“_Default” ValidateRequest=“false”  %>
 
< !DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
 
<html xmlns=“http://www.w3.org/1999/xhtml” >
<head id=“Head1″ runat=“server”>
    <title>Untitled Page</title>
    <style type=“text/css”>
	#lstWishList {
		background-color:lightgrey;
		font:10px notmal arial;
		overflow:visible;;
	}
	
	#divNumbers {
		font:10px notmal arial;
		line-height:13px;
	}
	.imgbutton {
		cursor:pointer;
	}
</style>
<script language=“javascript”>
 
	function LoadNumbers() {
		lst = document.getElementById(“lstWishList”);		
		lst.size = lst.options.length;
		lstNumbers = document.getElementById(“lstWishListNumbers”);		
		div = document.getElementById(“divNumbers”);
		s = “”;
		for (i=1;i<lst .length+1;i++) {
			s += i+“<br>”;
		}
		div.innerHTML = s;
	}
	function ProcessUp(upordown) {
	    if (lst.selectedIndex < 0) return;
		v = (upordown==‘up’)?1:-1;
		lst = document.getElementById(“lstWishList”);
		oldindex = lst.selectedIndex
		newindex = lst.selectedIndex-v
		if (newindex &lt;0 || newindex > lst.options.length-1) return;
		
		
		temp = lst.options[oldindex].text;
		tempv = lst.options[oldindex].value;
		
		lst.options[oldindex].text = lst.options[newindex].text;
		lst.options[oldindex].value = lst.options[newindex].value;
 
		lst.options[newindex].text = temp;
		lst.options[newindex].value = tempv;
		
		lst.selectedIndex = newindex;
	}
	
	function ProcessRemoval() {
	    if (!confirm(“Are you sure you want to remove this item?”)) return;
	    lst = document.getElementById(“lstWishList”);
	    
	    for (i=0;i</lst><lst .options.length;i++) {
	        if (lst.options[i].selected)
	            lst.remove(i);
	    }
	    LoadNumbers();
	}
	
	function PopulateHiddenField(){
	    hid = document.getElementById(“hidListItems”);
	    lst = document.getElementById(“lstWishList”);
	    s = “”;
	    for(i=0;i<lst.options.length;i++) {
	        s += lst.options[i].value + “|” + lst.options[i].text;
	        if (i+1 != lst.options.length) s+= “~”;
	    }
	    hid.value = s;
	}
 
</script>
    
</lst></script></head>
<body>
    <form id=“form1″ runat=“server”>
    <table cellpadding=0 cellspacing=0>
	<tr>
		<td colspan=3 style=“border:solid 1px black”>
<table><tr><td valign=“top” style=“background-color:lightgrey;”>
<div id=“divNumbers”>test</div>
</td><td>
<asp :ListBox ID=“lstWishList” runat=“server”></asp>
</td></tr></table>
</td>
</tr>
 
<tr><td align=center valign=middle><img src=“up.gif” class=“imgbutton” border=1 onclick=“ProcessUp(’up’)”/></td>
<td align=center valign=middle><img src=“down.gif” class=“imgbutton” border=1 onclick=“ProcessUp(’down’)”/></td>
<td align=center valign=middle><img src=“x.gif” class=“imgbutton” border=1 onclick=“ProcessRemoval()”/></td>
</tr>
 
</table>
        <br />
        <asp :Button ID=“Button2″ runat=“server” Text=“Submit Changes” OnClientClick=“PopulateHiddenField()” /><br />
        <br />
        <asp :HiddenField ID=“hidListItems” runat=“server” />
        <br />
        <hr />
        &nbsp;<br />
        Preview of datatable dt :
        <br />
        <br />
        <asp :GridView ID=“GridView1″ runat=“server”>
        </asp>
        
    </form>
</body>
</html>
<script language = “JavaScript”>
	LoadNumbers();
</script>
Default.aspx.vb: 
 
Imports System.Data
 
Partial Class _Default
    Inherits System.Web.UI.Page
    Dim dt As New DataTable
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
 
 
        ‘ Fill sample data in listbox
        Dim dr As DataRow
        dt.Columns.Add(“id”)
        dt.Columns.Add(“title”)
        If (Not IsPostBack) Then
            dr = dt.NewRow() : dr(“id”) = “33″ : dr(“title”) = “My Title” : dt.Rows.Add(dr)
            dr = dt.NewRow() : dr(“id”) = “13″ : dr(“title”) = “My Title blah” : dt.Rows.Add(dr)
            dr = dt.NewRow() : dr(“id”) = “1523″ : dr(“title”) = “asd asdf asda” : dt.Rows.Add(dr)
            dr = dt.NewRow() : dr(“id”) = “1723″ : dr(“title”) = “My Title asdf asdasdasd” : dt.Rows.Add(dr)
            dr = dt.NewRow() : dr(“id”) = “123″ : dr(“title”) = “2222 My Title” : dt.Rows.Add(dr)
            dr = dt.NewRow() : dr(“id”) = “1123″ : dr(“title”) = “122222 My Title” : dt.Rows.Add(dr)
 
            lstWishList.DataValueField = “id”
            lstWishList.DataSource = dt
            lstWishList.DataTextField = “title”
 
            lstWishList.DataBind()
        End If
 
    End Sub
 
 
    Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
 
        ‘ You will get list items as a delimeted string in hidden field - hidListItems.Value - re-fill datatable dt
 
        dt.Clear()
        Dim s() As String = hidListItems.Value.Split(“~”)
        Dim i As Integer
        Dim j As Integer
        Dim dr As DataRow
        For i = 0 To s.Length - 1
            Dim s1() As String = s(i).Split(“|”)
            dr = dt.NewRow() : dr(“id”) = s1(0) : dr(“title”) = s1(1) : dt.Rows.Add(dr)
        Next
        lstWishList.Items.Clear()
        lstWishList.DataValueField = “id”
        lstWishList.DataSource = dt
        lstWishList.DataTextField = “title”
 
        lstWishList.DataBind()
 
        ‘Now you have re-ordered values in datatable dt - use it to update database.
        ‘Like - delete all the wishlist items of this customer, then add this dt list 
 
        ‘data preview in grid view
 
        GridView1.DataSource = dt
        GridView1.DataBind()
    End Sub
End Class

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Mon
24
Sep '07

Testing for Programmers - Beginners

Part of PraVeeN's adventure in General

My new article Testing for Beginners available on CodeProject.

This article provides basic information about software testing for programmers in a beginner’s level.

Explain in detail about subject - testing is out of scope of this article. Just a simple Google search can give you more than enough results. So I wrote this article with just programmers in mind.

CodeProject Link: http://www.codeproject.com/useritems/TestingBeginners.asp

The same I copied to my website also at - http://ninethsense.com/content/view/54/55/

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Fri
21
Sep '07

Microsoft XNA - Quick sample

Part of PraVeeN's adventure in DOTNET, C#

This is a quick sample which demonstates the loading of texture and output of a string.


No worries, 99% of the code is already supplied by Visual Studio ;) 


 
#region Using Statements
using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Storage;
#endregion
 
namespace WindowsGame1
{
 
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        ContentManager content;
 
 
        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            content = new ContentManager(Services);
        }
 
 
        protected override void Initialize()
        {
            // TODO: Add your initialization logic here
 
            base.Initialize();
        }
 
 
        
        protected override void LoadGraphicsContent(bool loadAllContent)
        {
            if (loadAllContent)
            {
            }
 
        }
 
 
 
        protected override void UnloadGraphicsContent(bool unloadAllContent)
        {
            if (unloadAllContent)
            {
                content.Unload();
            }
 
        }
 
 
        protected override void Update(GameTime gameTime)
        {
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();
 
 
            base.Update(gameTime);
        }
 
 
        protected override void Draw(GameTime gameTime)
        {
            graphics.GraphicsDevice.Clear(Color.CornflowerBlue);
 
            string str = “Hello”;
            SpriteBatch f = new SpriteBatch(graphics.GraphicsDevice);
            SpriteFont font = content.Load<spritefont>(“Arial”);
            Vector2 fo = font.MeasureString(str)/2;
            Texture2D texture = content.Load<texture2d>(“mysprite”);
 
            f.Begin();
            f.Draw(texture, fo, Color.Blue);
            f.DrawString(font, str, fo, Color.Red);
            f.End();
 
            base.Draw(gameTime);
        }
    }
}
 
</texture2d></spritefont>

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Thu
20
Sep '07

Change attributes of items in a combobox

Part of PraVeeN's adventure in DOTNET, C#

This was an expiriment program for changing fonts, colors, draw shapes etc.

To alter the items, you need to use comboBox1.DrawMode

 
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
 
namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        
        public Form1()
        {
            InitializeComponent();
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
            comboBox1.DrawMode = DrawMode.OwnerDrawVariable;
            comboBox1.DropDownHeight = 200;
            comboBox1.Items.Add(“Hello”);
            comboBox1.Items.Add(“W o r l d”);
            comboBox1.Items.Add(“And MEEEEEEEEEEEEEEEEEeeeeee”);
 
        }
 
        
 
        private void comboBox1_DrawItem(object sender, DrawItemEventArgs e)
        {
            Graphics g = e.Graphics;
            e.DrawBackground();
            if (e.Index == 0)
            {
                g.FillRectangle(Brushes.Yellow, 10, 10, 70, 20);
                g.DrawString(“test”, new Font(“arial”, 10), Brushes.Green, 10, 10);
            }
            if (e.Index == 1)
            {
                g.DrawArc(new Pen(Color.Brown), 20, 20, 30, 30, 30, 120);
                g.DrawString(“test”, new Font(“courier new”, 10), Brushes.Red, 10, 70);
            }
            if (e.Index == 3)
            {
                g.DrawArc(new Pen(Color.Brown), 20, 40, 30, 30, 30, 120);
                g.DrawString(“tesT”, new Font(“courier new”, 10), Brushes.Red, 10, 90);
            }
        }
 
        private void comboBox1_MeasureItem(object sender, MeasureItemEventArgs e)
        {
            switch (e.Index)
            {
                case 0: e.ItemHeight = 50;
                    break;
                case 1: e.ItemHeight = 80;
                    break;
                case 2: e.ItemHeight = 30;
                    break;
            }
        }
    }
}


Inspired from MSDN link - http://msdn2.microsoft.com/en-us/library/system.windows.forms.combobox.drawmode.aspx

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Mon
17
Sep '07

Move a control with mouse on form

Part of PraVeeN's adventure in DOTNET, C#

This is a simple script which demonstates how to move a control (here I used button) by dragging it (without using builtin drag-drop features ;) )


 
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
 
namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        private int x = 0;
        private int y = 0;
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_MouseDown(object sender, MouseEventArgs e)
        {
            x = e.X;
            y = e.Y;
        }
 
        private void button1_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                button1.Left = (button1.Left + e.X) - x;
                button1.Top = (button1.Top +e.Y)-y;
            }
        }
    }
}

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