http://www.yourapplication.com?customer_id=15

Now if somebody replaced 15 with say 10 or any other number, they can pull up other customer information. And thats a bad for security.

One solution to this problem is to use ecryption using a secret key. So lets use a hard-to-crack 8 byte key like $zm0!qp?

To accomplish this heres a code snippet

using System;
using System.IO;
using System.Xml;
using System.Text;
using System.Security.Cryptography;

public class Encryption64
{
private byte[] key = {};
private byte[] IV = {18, 52, 86, 120, 144, 171, 205, 239};

public string Decrypt(string stringToDecrypt, string sEncryptionKey)
{
byte[] inputByteArray = new byte[stringToDecrypt.Length + 1];
try {
key = System.Text.Encoding.UTF8.GetBytes(sEncryptionKey, 8);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
inputByteArray = Convert.FromBase64String(stringToDecrypt);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(key, IV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
return encoding.GetString(ms.ToArray());
}
catch (Exception e) {
return e.Message;
}
}

public string Encrypt(string stringToEncrypt, string sEncryptionKey)
{
try {
key = System.Text.Encoding.UTF8.GetBytes(sEncryptionKey, 8);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = Encoding.UTF8.GetBytes(stringToEncrypt);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(key, IV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return Convert.ToBase64String(ms.ToArray());
}
catch (Exception e) {
return e.Message;
}
}
}

The end user will get to see a random text in the query string, something like

http://www.yourapplication.com/Receive.aspx?key=a2f5ckj?h79#8dd3

Remember stay secure stay safe.

@-moz-document url(http://www.w3.org/),
               url-prefix(http://www.w3.org/Style/),
               domain(mozilla.org)
{
  /* CSS rules here apply to:
     + The page "http://www.w3.org/".
     + Any page whose URL begins with "http://www.w3.org/Style/"
     + Any page whose URL's host is "mozilla.org" or ends with
       ".mozilla.org"
   */

  body { ... }
}

Browser compatibility
Available since Mozilla 1.8 / Firefox 1.5.

You can read more about this on Mozilla developer center website.

Now go and learn more about Mozilla CSS extentions.

regards,

www.avaricesoft.com

Pros:

• Easy to use
• Easy to extend
• Lightweighted
• No JavaScript required - you don’t have to write JavaScript at all
• Gaia is FREE

Samples
Download

regards,

www.avaricesoft.com

You can reproduce this behavior using the code below:

if (objDiv.style.visibility == 'visible' ||
objDiv.style.visibility == '')
{
objDiv.style.visibility = 'hidden';
}
else
{
objDiv.style.visibility = 'visible';
}

where objDiv is the div object which you’re trying to hide.

Solution

It’s simple - initialize “display” property in addition. So the above code will look like:

if (objDiv.style.visibility == 'visible' ||
objDiv.style.visibility == '')
{
objDiv.style.visibility = 'hidden';
objDiv.style.display = 'none';
}
else
{
objDiv.style.visibility = 'visible';
objDiv.style.display = 'block';
}

regards,

www.avaricesoft.com

“The strict equal to operator returns true if both operands are equal (and of the same type). It doesn’t perform any data type conversion, so an expression like 1 === true returns false and 1 === “1″ also returns false, because this operator checks for the type of the operands. 1 is a numerical value and “1″ is a string value; their types are different.”

regards,
www.avaricesoft.com

</PagerTemplate>
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#2461BF" />

</asp:FormView>
codebehind file///////////////

public partial class formvieweditupdate : System.Web.UI.Page
{
SqlConnection dbConn = null;
SqlDataAdapter da = null;
DataTable dTable = null;
String strConnection = null;
String strSQL = null;
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
bindData();
}
}
private void bindData()
{
try
{
strConnection = ConfigurationManager.ConnectionStrings["rubruConnectionString"].ConnectionString;
dbConn = new SqlConnection(strConnection);
dbConn.Open();
strSQL = "SELECT companyid, companyname,companycity  from companydetail order by companyname";
da = new SqlDataAdapter(strSQL, dbConn);
dTable = new DataTable();
da.Fill(dTable);
fv.DataSource = dTable;
fv.DataBind();
}
finally
{
if (dbConn != null)
{
dbConn.Close();
}
}
}

protected void Update(object sender, FormViewUpdateEventArgs e)
{
try
{
int cid = Convert.ToInt32((fv.Row.FindControl("theIDLabel1") as Label).Text);
string cname = (fv.Row.FindControl("theNameTextBox") as TextBox).Text;
string ccity = (fv.Row.FindControl("theCityTextBox") as TextBox).Text;
strConnection = ConfigurationManager.ConnectionStrings["rubruConnectionString"].ConnectionString;
dbConn = new SqlConnection(strConnection);
dbConn.Open();
SqlCommand   da = new SqlCommand( "Update companydetail set companyname=@comp,companycity=@comcity where companyid=@cid", dbConn);
da.Parameters.Add("@cid", SqlDbType.Int).Value = cid;
da.Parameters.Add("@comp", SqlDbType.VarChar).Value = cname;
da.Parameters.Add("@comcity", SqlDbType.VarChar).Value = ccity;
da.ExecuteNonQuery();
fv.ChangeMode(FormViewMode.ReadOnly);
}

finally
{
if (dbConn != null)
{
dbConn.Close();
bindData();
}
}

}
protected void Insert(object sender, FormViewInsertEventArgs e)
{
try
{

string cname = (fv.Row.FindControl("theNameTextBox") as TextBox).Text;
string ccity = (fv.Row.FindControl("theCityTextBox") as TextBox).Text;
strConnection = ConfigurationManager.ConnectionStrings["rubruConnectionString"].ConnectionString;
dbConn = new SqlConnection(strConnection);
dbConn.Open();
SqlCommand da = new SqlCommand("insert into companydetail values(@comp,@add,@comcity)", dbConn);
da.Parameters.Add("@add", SqlDbType.VarChar).Value ="";
da.Parameters.Add("@comp", SqlDbType.VarChar).Value = cname;
da.Parameters.Add("@comcity", SqlDbType.VarChar).Value = ccity;
da.ExecuteNonQuery();
fv.ChangeMode(FormViewMode.ReadOnly);
}

finally
{

if (dbConn != null)
{
dbConn.Close();
bindData();
}
}

}
protected void Delete(object sender, FormViewDeleteEventArgs e)
{
try
{
int cid = Convert.ToInt32((fv.Row.FindControl("theIDLabel") as Label).Text);
strConnection = ConfigurationManager.ConnectionStrings["rubruConnectionString"].ConnectionString;
dbConn = new SqlConnection(strConnection);
dbConn.Open();
SqlCommand da = new SqlCommand("delete from companydetail where companyid=@cid", dbConn);
da.Parameters.Add("@cid", SqlDbType.Int).Value = cid;
da.ExecuteNonQuery();
fv.ChangeMode(FormViewMode.ReadOnly);
}

finally
{

if (dbConn != null)
{
dbConn.Close();
bindData();
}
}

}
protected void ChangMode(object sender, FormViewModeEventArgs e)
{
if (e.NewMode.ToString() == "Edit")
{
fv.ChangeMode(e.NewMode);
}
else
if (e.NewMode.ToString()=="Insert")
{
fv.ChangeMode(e.NewMode);
}
else
fv.ChangeMode(e.NewMode);
bindData();
}

protected void pagechanged(object sender, FormViewPageEventArgs e)
{
fv.PageIndex = e.NewPageIndex;
bindData();
}
}

The problem: the web dev server only allows connections from "localhost", which doesnt include your dev pda, assuming you are using activesync. Long story, but even though the pda can browse the web using your desktop's ip, it has it's own local ip which makes the dev web server think it is a remote connection. Thus is winds up blocked.

Solution seems to be, download this tool: www.fiddlertool.com
Fiddler is a local proxy which is used for debugging http connections, and is normally used along with asp.net development.

You can disable the logging in fiddler so we're just using it as a local proxy.

On your windows mobile device, add an http proxy to the connection settings. Use port 8888 (the fiddler default), and use ppp_peer as the host name. Im told that windows mobile 5 and greater use dtpt_peer instead, but I havent tested this yet.

NOW: when you wish to connect to a locally hosted web app or web service from the pda, use this:

localhost.:1234/path.asmx

where 1234 is your port number and.. you get the idea. *But* notice the single "." after localhost. This is the magic that makes this work. How? Well, I've fought this battle long enough, discovering why is a luxury I don't have at the moment.

Basically we are going to use two arrays of strings, countries and favcountries.

1) Launch Visual studio 2008 and create an ASP.net web application in C# in your filesystem

2) In the page load event of the default.aspx type the following

 //create 2 string arrays
 

string[] countries = { "Britain", "France", "Croatia", "Argentina", "Australia", "Mexico", "Finland", "Spain", "Italy", "Greece" };
 

string[] favcountries={"Britain","Argentina","Greece","Brazil"};

//cocatenate the string arrays with the Concat method
var thecountries = countries.Concat(favcountries);

foreach (var c in thecountries)
             
Response.Write(c);

if you hit F5 and run your application you will all the countries listed in both arrays

3) If we need to get only the unique values from the arrays we must comment out this line in the code above

var thecountries = countries.Concat(favcountries);

and type this

 // only the unique countries appear with the union method
  var thecountries = countries.Union(favcountries);

if you hit F5 you will see in your browser the number of the countries in those lists without duplicate values.

you can achieve the exact same thing if you do not type the line above , but this one

var thecountries = countries.Concat(favcountries).Distinct();

4) If you want to see only the values that are in both arrays, comment out the following line

var thecountries = countries.Union(favcountries);

and type this new line that uses the Intersect method

 // countries that appear in both arrays
            var thecountries = countries.Intersect(favcountries);

If you run your application only the dublicate countries will appear.

5) If you want to get the items that appear in the first array but not in the second array(not common items in the arrays, all the items in the first array that do not match with anything from the second array), you comment out this line of code

var thecountries = countries.Intersect(favcountries);

and type this

var thecountries = countries.Except(favcountries);

All these extension methods  that enable us to filter, merge sequences live in the System.Collections.Generic namespace.

Path.

Menon FLV Converter is an On the FLY FLV Converter for ASP.Net Video Streaming Portal Websites. It will convert video files to the flv format.

Beta version of Menon FLV Converter is still under testing... We need your suggestions about this. So kindly post your comments or mail me on menononnet@gmail.com

</Columns>

<PagerTemplate>
<asp:LinkButton CommandName="Page" CommandArgument="First"
ID="LinkButton1" runat="server" Style="color: white">
« First</asp:LinkButton>
<asp:LinkButton CommandName="Page" CommandArgument="Prev"
ID="LinkButton2" runat="server" Style="color: white">
< Prev</asp:LinkButton>
[Records <%= gv.PageIndex * gv.PageSize%>-<%= gv.PageIndex * gv.PageSize + gv.PageSize - 1%>]
<asp:LinkButton CommandName="Page" CommandArgument="Next"
ID="LinkButton3" runat="server" Style="color: white">
Next ></asp:LinkButton>
<asp:LinkButton CommandName="Page" CommandArgument="Last"
ID="LinkButton4" runat="server" Style="color: white">
Last »</asp:LinkButton>
</PagerTemplate>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" SelectCommand="SELECT * FROM locality"
ConnectionString="<%$ ConnectionStrings:rubruConnectionString %>" />

use System.Security.Cryptography;
System.IO;
System.Text; name spaces

public class QueryStringEncryption
{
byte[] key = { };
byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB,0xCD, 0xEF};
public QueryStringEncryption()
{
//
// TODO: Add constructor logic here
//
}
public string Encrypt(string stringToEncrypt, string SEncryptionKey)
{
try
{
key = System.Text.Encoding.UTF8.GetBytes(SEncryptionKey.Substring(0, 8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = Encoding.UTF8.GetBytes(stringToEncrypt);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(key, IV), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return Convert.ToBase64String(ms.ToArray());

}
catch (Exception ex)
{
return ex.Message.ToString();
}
finally
{
}

}

public string Decrypt(string stringToDecrypt, string SEncryptionKey)
{
byte[] inputByteArray = new byte[stringToDecrypt.Length];
// inputByteArray.Length = stringToDecrypt.Length;
// inputByteArray.Length = stringToDecrypt.Length;
try
{
key = System.Text.Encoding.UTF8.GetBytes(SEncryptionKey.Substring(0, 8));
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
inputByteArray = Convert.FromBase64String(stringToDecrypt);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms,des.CreateDecryptor(key,IV),CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
return encoding.GetString(ms.ToArray());
}
catch ( Exception ex)
{
return ex.Message.ToString();
}
finally
{
}

}
}

Firebug - Most popular firefox add-on in the web developer community, not only allows debugging javascript but also allows inspecting ht[wp_caption id="attachment_5" align="alignnone" width="300" caption="Live http-headers in action"][/wp_caption]ml, helps seeing bandwidth and throughput of your page in terms of styles, javascript, raw html and images.

User Agent Switcher - This add-on allows you to switch your browser to simulate HTTP GET request as if its coming from IE/Opera/Netscape. I found it extremely useful when some sites are compatible to IE only and you want to inspect html or look at javascript, you can use the duo of User Agent Switcher and Firebug within Firefox itself even if page is designed for IE only.

Live Http Headers -  It answer's simple question - What it takes browser to load this page. Its useful when you are troubleshooting authentication issues like NTLM(NT LAN Manager) / Kerberos. Usually browser makes request for each physical file, i.e if your page has 2 css files, 2 references of images and 2 javascript files then it makes 6 requests to load this page. Also you can use this to determine whether GZIP compression is enabled or not.

Other Add-ons not specific to developer but useful in day-to-day activity are

Dictionary Tooltip - I remember couple of guys in my college time who used to mug up GRE-Barron's and some of the crazier guys mugging up Oxford dictionary to get good score in English. If I ask them meaning of any obscure word, I used to get dictionary answer. But, After I left the college, I tried several options like WordWeb

Gujurati Lexicon

The free dictionary

But all of them had an inherent disadvantage, you have to explicitly launch them, copy the spelling, hit enter, wouldn't it be nice if theres some add-on plugs into browser and displays meaning when you double click the word - and my hunt ended with Dictionary Tool-tip add-on.

I m tried to change the session value in web.config, IIS setting to increase the session but still not luck!

End up, I use the callback which offered by ASP.NET,
you can check out the link, it work for DNN to keep the session alive, I set the intervals to 15mins to hit server each time.

Here the simple example I m developed for DNN Module which will hit server for every 5 seconds then display alert in Internet Browser:

in ASCX,

<script language="JavaScript">

function ShowSucess(msg, context) {
if (msg != '')
alert(msg);
}
function startTimeOutRequest() {
initServerTimeRequest();
}

window.setInterval("startTimeOutRequest()", 5000);

</script>

in ASCX.CS,

protected void Page_Load(System.Object sender, System.EventArgs e)
{

ClientScriptManager cs = Page.ClientScript;

StringBuilder sb = new StringBuilder();
sb.Append("<script language=\"javascript\" type=\"text/javascript\">");
sb.Append("function initServerTimeRequest(args, context){");
sb.Append(cs.GetCallbackEventReference(this, "args", "ShowSucess", "context", false));
sb.Append("}");
sb.Append("</script>");
cs.RegisterStartupScript(GetType(), "initServerTimeRequest", sb.ToString());

}

public string GetCallbackResult()
{

return "Alert from Server";
}

public void RaiseCallbackEvent(string eventArgument)
{
//eventArgument <- this is the args from javascript, if in javascript  you pass 1, here will receive 1, Example: initServerTimeRequest(1) in ASCX, you will receive 1 for eventArgument

}

Here the link
for your reference.

}

We did encounter some serious problems recently in my work relevant to this issue. The Web Deployment Project for our Web Site that served us well for some time, all of a sudden stopped working giving this error in it's build output console.

One of my first attempts to solve this puzzle, after having searched the net for an answer, was to check if any of the containing types of the the assembly that seemed to be causing the problem, was given an already existent name across the project, but that was not the case.

I decided to look further the problem by manually compiling and merging the Web Application in order to gain more control over the issuing commands and, hopefully, get the duplicate type name.

As aspnet_compiler has always been compiling the project with success, I didn't use any extra switches to manipulate it's error/status output.

aspnet_compiler.exe -v /WebSite -p C:\Development\WebSite -u -f -d C:\Development\WebSiteBuild\TempBuildDir\

For aspnet_merge I used the extra -errorstack and -log arguments the functionality of which is described in the ASP.NET Merge Tool presentation article here.

aspnet_merge.exe C:\Development\WebSiteBuild\TempBuildDir\ -o WebSiteBuild -a -debug -copyattrs -errorstack -log merge.log

From the extra -errorstack argument I've learned that an UnAuthorizedAccessException causes aspnet_merge to fail with this stack trace:

[UnauthorizedAccessException]: Access to the path 'C:\Development\WebSiteBuild\TempBuildDir\bin\App_Web_9imofmvu.dll' is denied.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.File.Delete(String path)
at System.Web.Compilation.Merge.DeleteFileNoThrow(String filepath)
at System.Web.Compilation.Merge.RemoveOldAssembly(Hashtable assemblyMapping)
at System.Web.Compilation.Merge.Main(String[] args)

or

[UnauthorizedAccessException]: Access to the path 'C:\Development\WebSiteBuild\TempBuildDir\bin\App_Code.dll' is denied.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.File.Delete(String path)
at System.Web.Compilation.Merge.DeleteFileNoThrow(String filepath)
at System.Web.Compilation.Merge.RemoveOldAssembly(Hashtable assemblyMapping)
at System.Web.Compilation.Merge.Main(String[] args)

And from the the -log argument I didn't learn anything as the log file did not contain anything suspicious to me.

The gathered information didn't help much to achieve my initial goal, to unveil the duplicate type name, so I needed to move onto this mini research.

Having trust to what others say about the problem, and continuing to believe that for some reason a duplicate type name existed in the project - I had nothing else to work on -, I thought I could merge the assemblies using some tool other than aspnet_merge, that will hopefully give me more details if any error occurs.

After some googling I came up with a tool called ILMerge. It is hosted in Microsoft, is authored by Michael Barnett and shares the same codebase as aspnet_merge.

You typically use this tool in command of the following form:

ILMerge /target:(library|exe|winexe) /out:filename Program.exe ClassLibrary1.dll ClassLibrary2.dll

For the specific situation of merging the pre-compiled assemblies of a Web Site, the correct command to use is:

ILMerge /out:WebSiteBuild.dll App_Web_*.dll App_Web_*.dll App_Web_*.dll ...

For ILMerge to work you, obviously, first need to use aspnet_compiler to pre-compile your Web Site. You then need to explicitly specify all the assembly names that you want to take part in the merge operation. If you have PowerShell installed in your system you may issue the following command instead of specifying each assembly one-by-one:

PS C:\Develop\WebSiteBuild\TempBuildDir\bin> $assemblies = ls .\* -include App_*.dll -name; &'C:\Program Files\Microsoft\ILMerge\ILMerge.exe' /t:lib /out:WebSiteBuild.dll $assemblies

NOTE: You may need a Visual Studio PowerShell Prompt to do this.

and.. BINGO!

If a duplicate type name exists in your set of assemblies you should get the following output:

An exception occurred during merging: ILMerge.Merge: ERROR!!: Duplicate type 'Company.WebSite.YetAnotherClass' found in assembly 'App_Web_y1dnvgxw'.
at ILMerging.ILMerge.MergeInAssembly(AssemblyNode a, Boolean makeNonPublic)
at ILMerging.ILMerge.Merge()
at ILMerging.ILMerge.Main(String[] args)

Now that you have the name of the evil class name, all you have to do is to rename it, but in our case unfortunatelly things aren't that sweet because the YetAnotherClass IS NOT a duplicate type, and that left me scratching my head..

I thought this should be related to the compilation, and I took a more thorough looked into the aspnet_compiler arguments.

Compiling using the -fixednames argument, and then merging using the ILMerge OR the aspnet_merge tools, makes the problem dissapear, meaning that the compiler no longer produces duplicate type names. Bug?

The problem is that from within VS I fnd no other way to pass the -fixednames argument to aspnet_compiler than to use the "Merge each individual folder output to its own assembly" option which, apparently, is not equivalent to "Merge all outputs to a single assembly".

To the bottom line, if you experience the "Access Denied" error when merging all output to a single assembly, you may be able to overcome it but, probably, not from within VS, you'll have to use the command prompt instead.

UPDATE: Using the “Merge all pages and control outputs to a single assembly” option, which calls aspnet_merge with the -w param instead of the -o param, resolves the issues we had.

So if you run the code

string username = “user”;
string password = “password”;
MembershipUser mu = Membership.GetUser(username);
mu.ChangePassword(mu.ResetPassword(), password);

You will get an error when you try to reset the password. A solution is to add another Membership provider having all the same settings as the default provider with only one exception:

<add name="NewMembershipProvider" requiresQuestionAndAnswer=”false” ....../>

For all Membership functions, you the default Membership provider will be used, but when you need to reset the password, you must reference the new Provider. Here's a code excerpt to help you out:

string username = “user”;
string password = “password”;
MembershipUser mu = Membership.Providers["NewMembershipProvider"].GetUser(username, false);
mu.ChangePassword(mu.ResetPassword(), password);

So now your application can use both the Security feature to recover password and programmatically Change/Reset the password when required.

You can change the timeout value by modifying the web.config

for example:

<authentication mode="Forms">
<forms name=".ASPXFORMSDEMO" loginUrl="./logon.aspx" protection="All" path="/" timeout="2400" />
</authentication>

(my answer): Take off all my clothes, wedge them between the blades and the floor to prevent it from turning. Back up against the edge of the blender until the electric motor overheats and burns out. Using the notches etched in the side for measuring, climb out. If there are no such notches or they're too far apart, retrieve clothes and make a rope to hurl myself out.

FOR MORE GOOGLE INTERVIEW QUESTIONS CLICK HERE...

This C# OpenID library adds OpenID 2.0 Provider and Relying Party support to your web site both programmatically and through convenient drop-in ASP.NET controls.

Features

• Add support for your site visitors to login with their OpenIDs by just dropping an ASP.NET control onto your page. It's that easy.
• Give your site members their own OpenIDs with the provider support included in this library.
• Sample relying party and provider web sites show you just how to do it.
• Works in partial trusted shared hosting environments.
• Support for web farms where state persistence, front-facing web servers and ASP.NET may not be standard or even available.
• 170+ unit tests to verify correctness.

Via dotnetopenid - Google Code

(?=^.{8,}$)((?=.*\d)|(?=.*\W+))(?![.\n])(?=.*[A-Z])(?=.*[a-z]).*$

Description of this regular expression is as below:

Passwords will contain at least (1) upper case letter
Passwords will contain at least (1) lower case letter
Passwords will contain at least (1) number or special character
Passwords will contain at least (8) characters in length
Password maximum length should not be arbitrarily limited

let me know if you want any change in current regular expression according to your requirements.

Happy coding...