Jinesh Blogs

Basic hashing example

2010-09-22T21:07:00.000-07:00

protected void btnhash_Click(object sender, EventArgs e)
{
string salt = CreateSalt(txtpassword.Text.Length);
string pass = CreatePasswordHash(txtpassword.Text.Trim(), salt);
Label1.Text=pass;
}

public string CreateSalt(int size)
{
//Generate a cryptographic random number.
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
byte[] buff = new byte[size];
rng.GetBytes(buff);
// Return a Base64 string representation of the random number.
return Convert.ToBase64String(buff);
}

public string CreatePasswordHash(string pwd, string salt)
{
string saltAndPwd = String.Concat(pwd, salt);
string hashedPwd =
FormsAuthentication.HashPasswordForStoringInConfigFile(saltAndPwd, "sha1");
return hashedPwd;
}

Password encryption and decription in asp.net

2010-09-22T02:15:00.000-07:00

protected void btnsignup_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(ConfigurationManager.AppSettings["cnn"].ToString());
con.Open();
string pass = passencrypt(txtpassword.Text.Trim());
SqlCommand cmd = new SqlCommand("insert into userdetails values('" + txtusername.Text.Trim() + "','" + pass + "')", con);
cmd.ExecuteNonQuery();
txtusername.Text = ""; txtpassword.Text = "";
}
protected void btnrecoverpassword_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(ConfigurationManager.AppSettings["cnn"].ToString());
con.Open();
SqlCommand cmd = new SqlCommand("select password from userdetails where username=" + session["uname"].Tostring(), con);
string pass =(string) cmd.ExecuteScalar();
pass = passdecrypt(pass);
}

private string passencrypt(string sData)
{
byte[] encData_byte = new byte[sData.Length];
encData_byte = System.Text.Encoding.UTF8.GetBytes(sData);
string encodedData = Convert.ToBase64String(encData_byte);
return encodedData;
}
public string passdecrypt(string sData)
{
System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();
System.Text.Decoder utf8Decode = encoder.GetDecoder();
byte[] todecode_byte = Convert.FromBase64String(sData);
int charCount = utf8Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
char[] decoded_char = new char[charCount];
utf8Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0);
string result = new String(decoded_char);
return result;
}

Basic example of Stored procedure

2010-09-21T01:53:00.000-07:00

Hai,

In Asp.net page

SqlConnection con = new SqlConnection(ConfigurationManager.AppSettings["cnn"].ToString());
con.Open();
SqlCommand cmd = new SqlCommand("storedetails", con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@name", txtname.Text.Trim());
cmd.Parameters.AddWithValue("@class", txtclass.Text.Trim());
cmd.Parameters.AddWithValue("@mark", txtmark.Text.Trim());
cmd.ExecuteNonQuery();

Query to create stored procedure

CREATE PROCEDURE storedetails
@name varchar(30) = NULL,
@class varchar(5) = NULL,
@mark int = NULL
AS
BEGIN
SET NOCOUNT ON;
insert into student values(@name,@class,@mark)
insert into result values(@name,@class)
return
OnError: --If error exit gracefully
Return
END

send mail from ASP.Net

2010-04-23T07:59:00.000-07:00

Hai,

Check the below program to send mail message from asp.net, on problem is that, it may reach in spam!!

Imports System.Web
Imports System.Web.Mail
Imports System.Net
Imports System.Net.Mail

Protected Sub btnsendmail_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Dim status As Integer = sendMail("toaddress", "password", "XXXXX"
End Sub

Public Function sendMail(ByVal toadd As String, ByVal pass As String, ByVal nm As String) As Integer
Try
Dim smtpClient As New SmtpClient
smtpClient.Host = "localhost"
smtpClient.Port = 25
Dim msg As New Net.Mail.MailMessage
msg.From = New MailAddress("xxxxxxx@gmail.com")
msg.To.Add(toadd)
'Can add more toaddress, Cc and Bcc also
msg.Subject = "Haii"
msg.IsBodyHtml = True
msg.Body = "Hai " + nm + ",Your Login id is this mail address and Your pass word is :" + pass + "login now by CLICKHERE "
smtpClient.Send(msg)
Return (1)
Catch ex As Exception
Return (0)
End Try
End Function

Note: Another referance for the people who have a configured smtpmailserver. Visit this link: http://weblogs.asp.net/scottgu/archive/2005/12/10/432854.aspx

upload image in silverlight

2010-03-11T03:52:00.000-08:00

Hai,

Webservice

using System.IO;

using System.Configuration;

using System.Data;

[WebMethod]

public bool Upload(PictureFile picture)

{

FileStream fileStream = null;

BinaryWriter writer = null;

string filePath;

try

{

filePath = HttpContext.Current.Server.MapPath(".") +

ConfigurationManager.AppSettings["PictureUploadDirectory"] +

picture.PictureName;

int i = 0;

while (System.IO.File.Exists(filePath))

{

string ext = System.IO.Path.GetExtension(filePath);

filePath = HttpContext.Current.Server.MapPath(".") +

ConfigurationManager.AppSettings["PictureUploadDirectory"] +

System.IO.Path.GetFileNameWithoutExtension(filePath) + i + ext;

i++;

}

if (picture.PictureName != string.Empty)

{

fileStream = File.Open(filePath, FileMode.Create);

writer = new BinaryWriter(fileStream);

writer.Write(picture.PictureStream);

}

return true;

}

catch (Exception)

{

return false;

}

finally

{

if (fileStream != null)

fileStream.Close();

if (writer != null)

writer.Close();

}

public class PictureFile

{

public string PictureName { get; set; }

public byte[] PictureStream { get; set; }

}

Coding

using SilverlightApplicationgeetingcards.ServiceReference1;

private void btneffects_Click(object sender, RoutedEventArgs e)

{

OpenFileDialog openFileDialog = new OpenFileDialog();

openFileDialog.Filter = "JPEG files|*.jpg";

if (openFileDialog.ShowDialog() == true)

{

Stream stream = (Stream)openFileDialog.File.OpenRead();//img11.Clip.GetValue(Image.ClipProperty);

byte[] bytes = new byte[stream.Length];

stream.Read(bytes, 0, (int)stream.Length);

string fileName = openFileDialog.File.Name;//img11.Clip.GetValue(Image.SourceProperty).ToString();

PictureFile pictureFile = new PictureFile();

pictureFile.PictureName = fileName;

pictureFile.PictureStream = bytes;

services.UploadCompleted += new System.EventHandler(uploadpicturecompleted);

services.UploadAsync(pictureFile);

}

public void uploadpicturecompleted(object sender, UploadCompletedEventArgs e)

{

if (e.Error == null)

{

if (e.Result)

{ txtcomments.Text = "Upload succeeded (.'.)"; }

else

{ txtcomments.Text = "Upload failed ('.')"; }

}

How to host a silverlight website

2010-03-09T01:38:00.000-08:00

Hai,

To host a silverlight website or a website which includes the silverlight application. Note that the hosting is in your server and trying to configure in 'Windows server2003'.

Right click website on your iis- properties- Home directory - Configure

O\on 'Mappings' tab - ''ADD"

Two new extensions- '.aspx' and '.wgx' extensions and its executables.

The executable are same for both .aspx and wgx that is "C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_isapi.dll"

Check 'Script engine' and uncheck 'verify that file exists'.

Right click server name - Properties - 'MIMEtypes' - 'New'

and add three new extensions and MIME type.

extension MIMEType

.xap application/x-silverlight-2

.xaml application/xaml+xml

.xbap application/x-ms-xbap

These are the special settings to host silverlight website, all othrs are same to host

a normal website hosyting.

Referance: http://weblogs.asp.net/visualwebgui/archive/2008/12/28/developing-and-deploying-a-visual-webgui-silverlight-application.aspx

Convert image to icon in asp.net

2010-02-14T22:44:00.000-08:00

string filename, newfilename;
filename= "E:/..../images/window.jpg"; // your image location
newfilename= Path.ChangeExtension(filename, ".ico");
using(Bitmap bitmap = Image.FromFile(filename, true) as Bitmap)
{
using (Icon icon = Icon.FromHandle(bitmap.GetHicon()))
{
using (Stream iconfile = File.Create(newfilename))
{
icon.Save(iconfile);
Response.Write("Converted - " + newfilename);
}
}
}

Note: Get an icon file n the same folder of image with extension'.ico', it may not work properly,
if the file size morethan 120X120. Try to choose small images.

Add an Existing silverlight Project to website

2010-02-12T23:09:00.000-08:00

Hai,
To add an existing silverlight project to a website.
1) First we create / select a website.
2) file- Add- Existing Project- select our silverlight project
3) Delete the 'ClientBin' folder if there exist, note that if you have other files/folders than '.xap' file, don't forget to replace it temperly to other place.
4) "Rightclick" on the website- AddNewItem- select silverlight project template,
Show window with two option buttons, Click 'Use an existing silverlight project in this solution'. A combo box near it become enabled and show the silverlight project sin this solution(if you don't get a project go to step (2)).
5) You will get a 'ClientBin' folder and get the '.xap' file in it.

Note: View discussions about this topic: http://k-mug.org/forums/t/1400.aspx

Add new silverlight project to website

2010-02-12T22:48:00.000-08:00

Hai,
We can create silverlight project in two ways:
1) Create new project; New- project- silverlightproject
2) create a website and add a new silverlight project to it;
create new website-> "rightclick" on website 'Add Newitem'- select silverlight project(create/ select new folder to hold the silverlight project, it is good to create a folder in the website folder)- click ok
Note: Get a 'SilverlightTestpage.aspx' page which includes and show the silverlight '.xap' file output. '.xap' stores in'ClientBin' folder, if you want to show images, it ease to create a folder under 'Clientbin' folder and copy the images to it.
Note: After closing your programming, you may get some problems to open recently closed silverlight application, then you should follow the link below http://jineshrev.blogspot.com/2010/02/add-existing-silverlight-project-to.html View discussions about this topic: http://k-mug.org/forums/t/1396.aspx

Return datatable from Webservice

2010-02-10T20:36:00.000-08:00

Hai,
[WebMethod]
public DataTable TestDatatable
{
DataTable dt = new DataTable("AddressDatatable");
dt.Columns.Add("Name",typeof(System.String));
dt.Columns.Add("Address", typeof(System.String));

DataRow dr = dt.NewRow();
dr["Name"] = "Jinesh";
dr["Address"] = "RevathiBhavan";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["Name"] = "Retheesh";
dr["Address"] = "RetheeshBhavan";
dt.Rows.Add(dr);
return dt;
}
Client code:
private void button1_Click(object sender, EventArgs e)
{
helloservice.Service1 service = new WindowsFormsApplication1.helloservice.Service1();
DataTable dt = service.TestDatatable();
}
Note: If you don't give datatable name while declaring it may not not work properly.

Show photos in silverlight

2010-02-09T04:02:00.000-08:00

//// .xaml

//// .xaml.cs
private void btn1_Click(object sender, RoutedEventArgs e)
{
show.Children.Add(displayalbums());
}
public Canvas displayalbums()
{
show.Children.Clear();
Image img; int j = 0; double k = 1; int i;
Canvas c = new Canvas();
c.SetValue(Canvas.LeftProperty, 20.0);
for (i = 0; i < img =" new" height =" 100;" width =" 110;" src =" new" imgsource =" new" source =" imgSource;"> 3)
{ j = 0; k += 180.0; }
}
show.SetValue(Canvas.HeightProperty,(pagecounter(25))*180.0);
return c;
}
public int pagecounter(int n)
{
int i, r;
r = n % 4; // (4) denotes no. of items in each line
i = n / 4;
if (r > 0)
{ n = i + 1; }
else
{ n = i; }
return n;
}
Note: Make sure that your client bin directory contains the older 'images' and
all the images in that directory

Login program in silverlight/ silverlight database connection

2010-02-08T20:51:00.000-08:00

Dears,
Here a sample program to log in into a website using silverlight ....
We can't connect a database directly with silverlight, we use webservices to connect a silverlight
with database.
////silverlight
using System.Windows.Browser;
using System.Windows.Data;

using System.ServiceModel;
using SilverlightApplication.ServiceReference1;

private void btnlogin_Click(object sender, RoutedEventArgs e)
{
if (txt1.Text != "" && pwd.Password != "")
{
services.checkLoginCompleted += new System.EventHandler(logincheckcompleted);
services.checkLoginAsync(txt1.Text, pwd.Password);
}
else { MessageBox.Show("Username and Password shouldnot be blank"); }
}

public void logincheckcompleted(object sender, checkLoginCompletedEventArgs e)
{
if (e.Result != 0)
{
App appeg = (App)Application.Current;
appeg.clientid = Convert.ToInt32(e.Result);
//It's alternative for session, we can re-use the app.xaml variable in page1.xml also
Page1 p = new Page1();
this.Content = p;
}
else
{
MessageBox.Show("Invalid User Credentials");
}
}
////Webservice
[WebMethod]
public int checkLogin(string username, string password)
{
int retvalue=0;
retvalue =(int) frmclass.GetDBValue("select clientid from clientdetails where username='" + username + "' and password='" + password + "'");
return retvalue;
}
////class- here all database related functions lies.

public object GetDBValue(string sqlQuery)
{
object TheValue;
TheValue = 0;
OpenConnection();
db_Command.Connection = db_Connection;
db_Command.CommandText = sqlQuery;
db_Command.CommandType = CommandType.Text;
db_Reader = db_Command.ExecuteReader();
if (db_Reader.Read())
{
if (db_Reader[0] == null)
{ TheValue = 0; }
else
{ TheValue = db_Reader[0]; }
}
CloseConnection();
return TheValue;
}
public void OpenConnection()
{ try
{
if (db_Connection.State != ConnectionState.Open)
{ db_Connection.Open(); }
}
catch (Exception)
{ }
}
public void CloseConnection()
{
if (db_Connection.State != ConnectionState.Closed)
{ db_Connection.Close(); }
}

Top five mistakes of .Net developers

2010-02-08T20:43:00.000-08:00

Dears,

Look the following link to read top five mistakes of .Net programming.

http://amazedsaint.blogspot.com/2010/02/top-5-common-programming-mistakes-net.html

Note: This is the views from the blog: http://amazedsaint.blogspot.com/

Send sms from asp.net

2009-12-15T03:59:00.000-08:00

Hai,

Paste the following link to the add 'webreferance' window.
http://www.webservicex.net/SendSMS.asmx?wsdl

code
try
{
net.webservicex.www.SendSMS smsIndia = new net.webservicex.www.SendSMS();
net.webservicex.www.SMSResult smsre = new net.webservicex.www.SMSResult();

smsre= smsIndia.SendSMSToIndia("+91"+TextBox1.Text, "jineshrev@gmail.com", "Haiiii");

Label1.Text = smsre.Status; //"Message Send Succesfully";
}
catch (Exception ex)
{
Label1.Text = "Error in Sending message" + ex.ToString();
}

details will update later, Try it now...

Importing from excel sheet to program/dataset

2009-12-11T22:13:00.000-08:00

Hai,

Try it...

using System.Data.OleDb;

string connectionString = "Provider=Microsoft.Jet.OleDb.4.0; Data Source=D:/Book11.xls; Extended Properties=Excel 8.0;";

using (OleDbConnection Connection = new OleDbConnection(connectionString))
{
Connection.Open();
using(OleDbCommand command = new OleDbCommand())
{
command.Connection = Connection;
command.CommandText = "select * from [Sheet1$]";
//Name of the sheet(sheet1), '$' specify it is an excel sheet. otherwise consider as tablename.
DataSet ds = new DataSet();
OleDbDataAdapter da = new OleDbDataAdapter(command);
da.Fill(ds);
//show it in a gridview
GridView1.DataSource = ds;
GridView1.DataBind();
Connection.Close();
}
}

Exporting data to excel sheet

2009-12-11T21:37:00.000-08:00

Hai,

Make sure that your excel sheet in'.xls' format........

using System.Data.OleDb;

connectionString = "Provider=Microsoft.Jet.OleDb.4.0; Data Source=D:/Book1.xls; Extended Properties=Excel 8.0;";

using(OleDbConnection Connection = new OleDbConnection(connectionString))
{
Connection.Open();
using(OleDbCommand command = new OleDbCommand())
{
command.Connection = Connection;
try
{
command.CommandText = "drop table Sample1";
command.ExecuteNonQuery();
command.CommandText = "CREATE TABLE Sample1(FirstName Char(255), LastName char(255), Email char(255))";
command.ExecuteNonQuery();
}
catch(Exception ex)
{
command.CommandText = "CREATE TABLE Sample1(FirstName Char(255), LastName char(255), Email char(255))";
command.ExecuteNonQuery();
}
}
using(OleDbCommand command = new OleDbCommand())
{
command.Connection = Connection;
command.CommandText = "INSERT INTO Sample1(FirstName,LastName,Email) VALUES('Anuraj','P','anuraj.p@example.com')";
command.ExecuteNonQuery();
command.CommandText = "INSERT INTO Sample1(FirstName,LastName,Email) VALUES('sreekumar','VN','sreekumar.vn@example.com')";
command.ExecuteNonQuery();
command.CommandText = "INSERT INTO Sample1(FirstName,LastName,Email) VALUES('jinesh','B','jinesh.b@example.com')";
command.ExecuteNonQuery();
command.CommandText = "INSERT INTO Sample1(FirstName,LastName,Email) VALUES('ratheesh','S','ratheesh.s@example.com')";
command.ExecuteNonQuery();
}
DataSet ds = new DataSet();
OleDbDataAdapter da = new OleDbDataAdapter("select * from Sample1", Connection);
da.Fill(ds);

DataGrid dgGrid = new DataGrid(); object missing = Type.Missing;

Microsoft.Office.Interop.Excel.Application oExcel=new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbooks oBooks = (Microsoft.Office.Interop.Excel.Workbooks)oExcel.Workbooks;//;
Microsoft.Office.Interop.Excel._Workbook oBook = (Microsoft.Office.Interop.Excel._Workbook)(oBooks.Add(missing));

Microsoft.Office.Interop.Excel.Sheets oSheets = (Microsoft.Office.Interop.Excel.Sheets)oBook.Worksheets;//= new Microsoft.Office.Interop.Excel._Worksheet();
Microsoft.Office.Interop.Excel._Worksheet oSheet = (Microsoft.Office.Interop.Excel._Worksheet)(oSheets.get_Item(1));

Microsoft.Office.Interop.Excel.Range oRange = oSheet.get_Range("A1", missing);
oRange.Value2 = "First Name";

oRange = oSheet.get_Range("B1", missing);
oRange.Value2 = "Last Name";

oRange = oSheet.get_Range("C1", missing);
oRange.Value2 = "Email";

oRange = oSheet.get_Range("A1", "C1");
Microsoft.Office.Interop.Excel.Font oFont = oRange.Font;
oFont.Bold = true; int j=1;
for (int i = 0; i < ds.Tables[0].Rows.Count;i++)
{
j++;
oRange = oSheet.get_Range("A"+j, missing);
oRange.Value2 = ds.Tables[0].Rows[i][0];

oRange = oSheet.get_Range("B"+j, missing);
oRange.Value2 = ds.Tables[0].Rows[i][1];

oRange = oSheet.get_Range("C" +j, missing);
oRange.Value2 = ds.Tables[0].Rows[i][2];

}

oBook.SaveAs("D:/Book11.xls", missing, missing, missing, missing, missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing);

oBook.Close(false,missing,missing);
oExcel.Quit();
}

NSS HSS, karuvatta

2009-08-19T05:08:00.001-07:00

Famous school in karuvatta. Lacs of pupil passed from here and works
different part of the world. Molding the society in more than last 50 years.
Now you are sign inned in orkut
Click HERE to reach NSSHSS orkut community.

Hallo, My most loving place.

2009-08-19T04:56:00.000-07:00

A view from back water side . it lies in north part of karuvatta.
Every year conduct boat race. A national water way.
Now you are sign Inned in Orkut.
Click HERE to reach in Orkut Karuvatta Community.

haiiii

2009-07-08T05:10:00.000-07:00

Hallo,
blog starts here.
Click Here to view my ORKUT account

Jinesh Profile

2008-07-30T23:11:00.000-07:00

I am Jinesh B. At Karuvatta.

My email:

jineshrev@gmail.com
jineshrev@hotmail.com
jineshrev@sify.com
jineshputhenkulangara@yahoo.co.in