Code Example for abstract and interface

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;

namespace ConsoleApplication3
{
   abstract class test
    {
        abstract public void print();
        public int y; //can initialise fields 
    }

     class Program:test

    {
         //abstract class
        public override void print()
        {
            x = 10;
            Console.WriteLine("Abstract  : test value :"+y.ToString());
        }
         //end of abstract
        public int x;
     }
     interface test_interface
     {
        void test();
         // int x; it gives the error as Error    "Interfaces cannot contain fields"            
     }
     class tt:Program,test_interface //inherit base class and interface
    {
        //interface
        public  void test()
        {
           
            Console.WriteLine("interface value");
        }
        //end
     }

   
    class main_class
    {
        static void Main(string[] args)
        {
           
            Program pp = new Program();//create instance for base class for abstract only;
            tt te=new tt(); //for both abstract and derived class
            te.print();//abstract
            te.test();//interface

            pp.print();//
           
            pp.x = 100;
            Console.WriteLine(pp.x);
            test_interface ttt = (test_interface)te;//type casting into interface type
            ttt.test();
        }
    }
}

code for creating sql server table as a xml file

DataTable data_table = new DataTable();
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter("select * from test_table", connection);
da.Fill(ds);
ds.WriteXml(@"c:\output2.xml", XmlWriteMode.IgnoreSchema);
connection.Close();


Read XML file data

XmlTextReader xml_reader = new XmlTextReader(@"c:\output1.xml");
        XmlDocument xml_doc = new XmlDocument();
        xml_doc.Load(xml_reader);
        XmlNode select_node = xml_doc.SelectSingleNode("NewDataSet");
        node_list = xml_doc.GetElementsByTagName("Table");

        for (i = 0; i < node_list.Count; i++)
        {
            for (j = 0; j < node_list[i].ChildNodes.Count; j++)
            {
                     Response.Write(node_list[i].ChildNodes[j].InnerText);
            }
}

code for zip and unzip the file using c#

using System.IO.Compression;
using System.IO;


Zip the File

 FileStream sourceFile = File.OpenRead(@"C:\output1.xml");
        FileStream destFile = File.Create(@"C:\sample.zip");

        GZipStream compStream = new GZipStream(destFile, CompressionMode.Compress);

        try
        {
            int theByte = sourceFile.ReadByte();
            while (theByte != -1)
            {
                compStream.WriteByte((byte)theByte);
                theByte = sourceFile.ReadByte();
            }
        }
        finally
        {
            compStream.Dispose();
        }


UnZip the File

 string srcFile = @"C:\sample.zip";
        string dstFile = @"C:\file_xml1.xml";

        FileStream file_stream_in = null;
        FileStream file_stream_out = null;
        GZipStream zip = null;
        const int bufferSize = 4096;
        byte[] buffer = new byte[bufferSize];
        int count = 0;

        try
        {

            file_stream_in  = new FileStream(srcFile, FileMode.Open, FileAccess.Read, FileShare.Read);
            file_stream_out  = new FileStream(dstFile, FileMode.Create, FileAccess.Write, FileShare.None);
            zip = new GZipStream(file_stream_in , CompressionMode.Decompress, true);
            while (true)
            {
                count = zip.Read(buffer, 0, bufferSize);
                if (count != 0)
                {
                    file_stream_out.Write(buffer, 0, count);
                }
                if (count != bufferSize)
                {
                 
                    break;
                }
            }
        }
        catch (Exception ex)
        {
        
            System.Diagnostics.Debug.Assert(false, ex.ToString());
        }

code for using Jquery in asp.net

 protected override void Render(HtmlTextWriter writer)
    {
        this.Page.ClientScript.RegisterClientScriptInclude("jQuery", "http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js");
        this.Page.ClientScript.RegisterStartupScript(this.Page.GetType(), "startup", "");
        base.Render(writer);
    }

Jquery

       function test_alert()     {     $("#sample").animate({width: "70%",opacity: "0.4",marginLeft: "0.6in",fontSize: "3em",      borderWidth: "10px"}, 1500 );     //alert('Proceed to hide the message');     $("#sample").hide(3000,function () {     $(this).show(5000, function () {     $(this).slideUp(10000,function() {     $(this).slideDown(1000);        });     });     });     });     }     function helloWorld()     {         $("#sample").append("Hello World!!");          $("#sample").click(test_alert);          $("#sample").removeClass("bgcolor").addClass("newcolor");          $("#p:first").fadeTo("slow",0.33);             }                

copying text file values as a database column values

Step 1   :   create a table name as login...

Step 2   :

BULK INSERT login FROM 'c:\test_sql.txt' WITH
(
FIELDTERMINATOR = ',',--Data format in text file is username,password in a row.it is used to trminate the symbol comma and assume as a 2 column values

ROWTERMINATOR = '\n' )    --for next line
GO

--Showing the Result
SELECT *
FROM login
GO

Stored procedure for finding number days in month

Finding number of days in a month

alter procedure no_of_days as
Declare @no_of_days int
Declare @prev_month varchar(100)
Declare @current_month varchar(100)
Declare @file_duration varchar(100)
DECLARE @returnDate INT
declare @days int

SET @returnDate = CASE WHEN MONTH(getdate())
IN (1, 3, 5, 7, 8, 10, 12) THEN 31
WHEN MONTH(getdate()) IN (4, 6, 9, 11) THEN 30
ELSE CASE WHEN (YEAR(getdate()) % 4 = 0
AND
YEAR(getdate()) % 100 != 0)
OR
(YEAR(getdate()) % 400 = 0)
THEN 29
ELSE 28 END
END

Get previous month name and current month name

set @no_of_days=@returnDate
set @prev_month=(Select Datename(mm, GetDate()-@no_of_days))
set @current_month=(Select Datename(mm, GetDate()))
set @file_duration=@prev_month+'-'+@current_month

Code for Copying Sql Table data into Excel file

Step 1:

Before run this procedure u have to create a excel template file with the relevant column name of the table.

Step 2:

Create PROCEDURE SP_Sql_Excel @File_Name as varchar(50) = ''
AS
BEGIN
    SET NOCOUNT ON

    DECLARE @Dos_Command varchar(1000)
    DECLARE @reportname varchar(500)
    DECLARE @Oledb_provider varchar(100)
    DECLARE @Excel_String varchar(100)

--    New File Name to be created
    IF @File_Name = ''
        Select @reportname = 'C:\temp\Excel\Template1.xls'
    ELSE
        Select @reportname = 'C:\temp\Excel\' + @File_Name + '.xls'

--    FileCopy command string formation
    SELECT @Dos_Command = 'Copy C:\temp\Excel\Template1.xls ' + @reportname

--    Execute Dos Copy command
    EXEC MASTER..XP_CMDSHELL @Dos_Command, NO_OUTPUT

--    Mentioning the OLEDB povider and excel destination filename
    set @Oledb_provider = 'Microsoft.Jet.OLEDB.4.0'
    set @Excel_String = 'Excel 8.0;Database=' + @reportname

--    Executing the OPENROWSET Command for copying the sql data  contents to Excel sheet.
exec('insert into OPENrowset (''' + @Oledb_provider + ''',''' + @Excel_String + ''',''SELECT username,password FROM [Sheet1$]'') select username,password from login')

SET NOCOUNT OFF
END



Step 3:

Run the Procedure


Exec SP_Sql_Excel 'filename'

Connecting Remote computer via code

private connection_status;
 private IPAddress ip_address;
    private TcpClient tcp_server;


ip_address = IPAddress.Parse (TextBox1.Text);
        tcp_server = new TcpClient();
        tcp_server.Connect(ip_address, port number);
        connection_status = true;
        if (connection_status)
        {
            Response.Write("connected");
        }
        else
        {
            Response.Write ("Not connected");
        }

Creating Dll Manually

Below image is show the steps to create dll file manually from web service files.

Code for Download a file from a folder

string[] filepath = Directory.GetFiles(Server.MapPath("~\\upload files"));
            foreach (string fileName in filepath)
            {
                string filename_read = Path.GetFileNameWithoutExtension(fileName);
                if (hidden_tar_file.Value == filename_read)
                {
                    System.IO.FileInfo file = new System.IO.FileInfo(fileName);
                    if (file.Exists)
                    {
                        Response.Clear();
                        Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
                        Response.AddHeader("Content-Length", file.Length.ToString());
                        Response.ContentType = "application/octet-stream";
                        Response.WriteFile(file.FullName);
                        Response.End();
                    }
                }
         
            }