Encoded Hex String to Text with C#

byte[] data = FromHex ( "4D657373616765204C696E652032" );
s = Encoding.ASCII.GetString ( data );
public static byte[] FromHex ( string hex )
{

byte[] raw = new byte[hex.Length / 2];
for (int i = 0; i < raw.Length; i++)
{ raw[i] = Convert.ToByte ( hex.Substring ( i * 2, 2 ), 16 ); }
return raw;
}

Use explicit casting instead of DataBinder.Eval to Improve data binding perfomance

The DataBinder.Eval method uses .NET reflection to evaluate the arguments that are passed in and to return the results. Consider limiting the use of DataBinder.Eval during data binding operations in order to improve ASP.NET page performance.

Consider the following ItemTemplate element within a Repeater control using DataBinder.Eval:





<%# DataBinder .Eval(Container.DataItem, "field1") %>

<%# DataBinder .Eval(Container.DataItem, "field2") %>





Using explicit casting offers better performance by avoiding the cost of .NET reflection. Cast the Container.DataItem as a DataRowView:





<%# ((DataRowView)Container.DataItem)["field1"] %>

<%# ((DataRowView)Container.DataItem)["field2"] %>

Win32_OperatingSystem-find computer last bootup time

Hi Firends yesterday i have play with Win32_Operating System class and i have found out using this task i can intract with my computer operating system.. I had dig into that and for sample here i am going to write code to find out your computer last bootup time
VB.NET Code

Public Sub Lastbootuptime()
Dim strComputer As String = "." ' Local computer
Dim objWMIDateTime As Object = CreateObject("WbemScripting.SWbemDateTime")
Dim objWMI As Object = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")
Dim colOS As Object = objWMI.InstancesOf("Win32_OperatingSystem")
For Each objOS In colOS
objWMIDateTime.Value = objOS.LastBootUpTime
MessageBox.Show("Last Boot Up Time: " & objWMIDateTime.GetVarDate)
Next
End Sub
Abhishek Hingu at:
http://www.indianic.com/

Generate Counter Image runtime

1 <%@ page language="vb" contenttype="image/jpeg" %> 2 <%@ import namespace="system.drawing" %> 3 <%@ import namespace="system.drawing.imaging" %> 4 <%@ import namespace="system.drawing.drawing2d" %> 5 <% 6 7 response.clear ' make sure Nothing has gone to the client 8 9 10 dim imgOutput as New bitmap(120, 30, pixelformat.format24bpprgb) ' create a New 24bit, 120x30 pixel image 11 dim g as graphics = graphics.fromimage(imgOutput) ' create a New graphic object from the above bmp 12 13 application("intPageCount")+=1 ' really dumb page counter 14 15 g.clear(color.yellow) ' blank the image 16 g.smoothingMode = smoothingMode.antiAlias ' antialias objects 17 18 ' draw the number on the image canvas in verdana 10pt font bold 19 g.drawString("Count: " & application("intPageCount"), New font("verdana",14,fontstyle.bold),systembrushes.windowtext, New pointF(2,2)) 20 21 ' draw a graduated fill across the image 22 g.FillRectangle(New linearGradientBrush(New point(0,0), New point(120,30), color.fromArgb(0,0,0,0),color.fromArgb(255,255,255,255)),0,0,120,30) 23 24 25 imgOutput.save(response.outputstream, imageformat.jpeg) ' output to the user 26 27 28 ' tidy up 29 g.dispose() 30 imgOutput.dispose() 31 response.end 32 33 %>

Validate String max length using Reguler Expression in C#

class Program
{
static void Main(string[] args)
{
if (Regex.IsMatch("[Input String]","^.{4,20}$" ))
{
Console.WriteLine("true");
}
else
{
Console.WriteLine("false");
}
Console.ReadLine();
}
}

Universal Contdown timer + javascript

//Javascript to create Universal Countdown timer

function GetCount(){
dateFuture = new Date(document.getElementById('servertime').value); // Get server datetime to find time difference between local time and server time as per GMT
var d=new Date();
var localTime = d.getTime();
var localOffset = d.getTimezoneOffset() * 60000;
var utc = localTime + localOffset;
var offset = document.getElementById('offset').value;
var london = utc + (3600000*offset);
dateNow = new Date(london); //grab current date
amount = dateFuture.getTime() - dateNow.getTime(); //calc milliseconds between dates
delete dateNow;

// time is already past
if(amount < 0){
document.getElementById('countbox').innerHTML="Now!";
}
// date is still good
else{
days=0;hours=0;mins=0;secs=0;out="";

amount = Math.floor(amount/1000);//kill the "milliseconds" so just secs

days=Math.floor(amount/86400);//days
amount=amount%86400;

hours=Math.floor(amount/3600);//hours
amount=amount%3600;

mins=Math.floor(amount/60);//minutes
amount=amount%60;

secs=Math.floor(amount);//seconds

if(days != 0){out += days +" day"+((days!=1)?"s":"")+", ";}
if(days != 0 || hours != 0){out += hours +" hour"+((hours!=1)?"s":"")+", ";}
if(days != 0 || hours != 0 || mins != 0){out += mins +" minute"+((mins!=1)?"s":"")+", ";}
out += secs +" seconds";
document.getElementById('countbox').innerHTML=out;
setTimeout("GetCount()", 1000);
}
}


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