Real Tech: July 2013

Wednesday, 10 July 2013

How to Execute C# Program using command prompt

Open Notepad

Write a sample program

Write bellow code in notepad and save as Test.cs

using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 
 namespace ConsoleApplication3
 {
     class Program
     {
         static void Main(string[] args)
         {
             Console.WriteLine("Enter N number");
             int n = Convert.ToInt32(Console.ReadLine());
             int i = 0, sum=0;
             for (i = 0; i <= n; i++)
             {
                 sum = sum + i;
             }
             Console.WriteLine(sum);
             Console.ReadLine();
 
         }
     }
 }

save this file in C Drive.

Next open Visula Studio Command prompt.

set the directory in Visual studio Command Prompt

now enter

C:\>CSC Test.cs

Enter

Enter N

Then the result

0+1+2+3= 6

Tuesday, 9 July 2013

Find The sum of N numbers

using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 
 namespace ConsoleApplication3
 {
     class Program
     {
         static void Main(string[] args)
         {
             Console.WriteLine("Enter N number");
             int n = Convert.ToInt32(Console.ReadLine());
             int i = 0, sum=0;
             for (i = 0; i <= n; i++)
             {
                 sum = sum + i;
             }
             Console.WriteLine(sum);
             Console.ReadLine();
 
         }
     }
 }

Monday, 8 July 2013

Find age or number of years between Two dates:

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs"
  Inherits="_Default" %>
 
 <!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 runat="server">
     <title>Age</title>
 </head>
 <body>
     <form id="form1" runat="server">
     <div>
     <table>
     <tr>
     <td>
     BirthDaydate:
     </td>
     <td>
         <asp:TextBox runat="server" ID="txtBirthDayDate" ></asp:TextBox>
     </td>
     <td>
     Number Of days:
     </td>
     <td>
 
     <asp:TextBox runat="server" ID="txtResult"></asp:TextBox>
     </td>
     </tr>
     <tr>
     <td colspan="3">
  <asp:Button runat="server" ID="btnDays" OnClick="CountNumberOfdays_Click" Text="CheckDates" />
     </td>
     </tr>
     </table>
 
 
    
     </div>
     </form>
 </body>
 </html>

using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Web;
 using System.Web.UI;
 using System.Web.UI.WebControls;
 
 public partial class _Default : System.Web.UI.Page 
 {
     protected void Page_Load(object sender, EventArgs e)
     {
 
     }
     protected void CountNumberOfdays_Click(object sender, EventArgs e)
     {
 
         DateTime date = Convert.ToDateTime(txtBirthDayDate.Text);
       
         DateTime BirthDayDate = new DateTime(date.Year, date.Month, date.Day);
         DateTime Todaydate = DateTime.Now;
 
         TimeSpan ts = Todaydate - BirthDayDate;
         
         float differenceInDays = ts.Days;
         float age = differenceInDays / 365;
 
         txtResult.Text = age.ToString();
     }
 }

Result:

Enter Date in first Text box:

1-02-2013

Age:

0.5123287

Sunday, 7 July 2013

confirm box in Javascript:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test.aspx.cs"
  Inherits="Test" %>
 
 <!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 runat="server">
     <title></title>
 
     <script type="text/javascript">
         function conformbox() {
             var x;
             var r = confirm("please click any one");
             if (r == true) {
                 x = "Ok Continue";
             }
             else {
                 x = "cansel";
             }
             document.getElementById("id").innerHTML = x;
         }
 </script>
     
 
 </head>
 <body>
     <form id="form1" runat="server">
     <div>
     
 <input type="button" value="click me" onclick="conformbox()" />
 <p id="id" ></P>
     </div>
     </form>
 </body>
 </html>

Find the biggest number in an array:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test.aspx.cs"
  Inherits="Test" %>
 
 <!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 runat="server">
     <title></title>
 
     <script type="text/javascript">
         function srinu() {
             var ar = new Array();
             ar[0] = 6;
             ar[1] = 4;
             ar[2] = 17;
             ar[3] = 3;
             ar[4] = 11;
             ar[5] = 10;
             var max = ar[0];
 
             for (var i = 1; i < ar.length; i++) {
 
                 if (max < ar[i]) {
                     max = ar[i];
                 }
                 
             }
             alert(max);
            
 
         }
 </script>
     
 
 </head>
 <body>
     <form id="form1" runat="server">
     <div>
     
 <input type="button" onclick="srinu()" value="click me" />
     </div>
     </form>
 </body>
 </html>

Count the number of checked box checked:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test.aspx.cs"
  Inherits="Test" %>
 
 <!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 runat="server">
     <title></title>
 
 
     <script type="text/javascript" >
         function srinu() {
             var i;
             var count = 0;
 
             for (i = 1; i <= 4; i++) {
                 var str = "c" + i;
                 if (document.getElementById(str).checked == true) {
                     count++;
                 }
             }
             alert(count);
         }
 </script>
 </head>
 <body>
     <form id="form1" runat="server">
     <div>
     <input type="checkbox" id="c1"  value="1">fierst checkbox<br/>
 <input type="checkbox" id="c2"  value="2">second checkbox<br/>
 <input type="checkbox" id="c3"  value="3">third checkbox<br/>
 <input type="checkbox" id="c4"  value="4">four checkbox<br/>
 <input type="button" onclick="srinu()" value="click me" />
     </div>
     </form>
 </body>
 </html>

Friday, 5 July 2013

Prime Number Between Two numbers:

using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 
 namespace ConsoleApplication2
 {
     class Program
     {
         static void Main(string[] args)
         {
             Console.WriteLine("Enter Two Numbers");
             Console.WriteLine("Enter First Number");
             int i = Convert.ToInt32(Console.ReadLine());
             Console.WriteLine("Enter second number");
             int j = Convert.ToInt32(Console.ReadLine());
             for (int k = i; k <= j; k++)
             {
                 int count = 0;
                 for (int l = 1; l <= k; l++)
                 {
 
                     if (k % l == 0)
                     {
                         count++;
                     }
 
                 }
                 if (count == 2)
                 {
                     Console.WriteLine(k);
                 }
             }
             Console.ReadLine();
 
 
         }
     }
 }

Monday, 1 July 2013

Login Example page

In this article i will give simple Login page. It may be very useful for beginners. if you have any queries feel free to ask me.

1. Create a login table

2. Insert User names and passwords into login table.

3. Design login page . Take two TextBoxes , one button and one result label.

4. Write code for Onclick Event in Login.cs file.

     -- CREATE LOGINTABLE 
     CREATE TABLE LOGINTABLE
     (
     USERNAME VARCHAR(50),
     PASSWORD VARCHAR(50)
     )
 
     -- INSERT INTO LOGINTABLE
 
     INSERT INTO LOGINTABLE VALUES
                                 (
                                 'srinu.munagala33@gmail.com',
                                 '07m11a1233'
                                 )

SELECT * FROM LOGINTABLE

USERNAME	PASSWORD
srinu.munagala33@gmail.com	07m11a1233

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Login.aspx.cs" Inherits="testLogin._Default" %>
 
 <!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 runat="server">
     <title></title>
 </head>
 <body>
     <form id="form1" runat="server">
     <div>
     <table align="center" >
     
     <tr>
     <td colspan="2">
 
     <span> Login </span>
     
     </td>
     </tr>
     <tr>
     <td>
     <span>User Name</span>
     </td>
     <td>
     <asp:TextBox runat="server" ID="txtUserName" Width="180px" ></asp:TextBox>
     </td>
     </tr>
     <tr>
     <td>
     <span>Password</span>
     </td>
     <td>
     <asp:TextBox runat="server" ID="txtPassword" Width="180px" TextMode="Password" ></asp:TextBox>
     </td>
     </tr>
     <tr>
     <td colspan="2" align="center">
     <asp:Button runat="server" ID="btnSubmit" Text="Login" OnClick="login_Submit" />
     
     </td>
     
     </tr>
     <tr>
     <td align="center" colspan="2">
     <asp:Label runat="server" ID="lblResult" style=" color:Red ; font-size:20px;" ></asp:Label>
 
     <span  ></span>
     </td>
     
     </tr>
     </table>
     </div>
     </form>
 </body>
 </html>

.Cs

using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Web;
 using System.Web.UI;
 using System.Web.UI.WebControls;
 using System.Data;
 using System.Data.SqlClient;
 
 namespace testLogin
 {
     public partial class _Default : System.Web.UI.Page
     {
         protected void Page_Load(object sender, EventArgs e)
         {
 
         }
 
 
         protected void login_Submit(object sender, EventArgs e)
         {
             SqlConnection SqlCon = new SqlConnection(@"Data Source=.\SQLEXPRESS;Initial Catalog =Test;Integrated Security=True");
 
             try
             {
                 SqlCon.Open();
                 SqlCommand SqlCom = new SqlCommand("select count(*) from LOGINTABLE where userName ='" + txtUserName.Text + "' and password ='" + txtPassword.Text + "'", SqlCon);
 
                 int i = Convert.ToInt32(SqlCom.ExecuteScalar());
                 if (i > 0)
                 {
                     lblResult.Text = "Login Success";
                 }
 
                 else
                 {
                     lblResult.Text = "Please enter valied username and password";
                 }
             }
             catch (Exception ex)
             {
                 lblResult.Text = ex.Message;
             }
             finally
             {
                 SqlCon.Close();
             }
         }
         
         }
     }