Get First and Last Date from Calender control in Asp.Net

Hello guys

Here I am going to explain how we can get the first date and last date for selected month and year from asp.net calender control. Here we just need quite easy logic on 2 events on calender. The events are Prerender and Dayrender. In PreRender, I have take session as null so everytime when page is loading, it get null before processing on calender days. Then I have write some logic to show FirstDate, Lastdate and also same for each week in the month.

C# Code
protected void Calendar1_PreRender(object sender, EventArgs e)
{
Session["FirstDay"] = null;
Session["LastDay"] = null;
}

protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)
{
if (Session["FirstDay"] == null)
Session["FirstDay"] = e.Day.Date;

if (Session["LastDay"] == null)
Session["LastDay"] = e.Day.Date.AddDays(41);

string LastDates = Convert.ToDateTime(Session["LastDay"]).ToShortDateString();
if (e.Day.Date.ToShortDateString() == LastDates)
{
DateTime FirstDate = Convert.ToDateTime(Session["FirstDay"]);
DateTime LastDate = Convert.ToDateTime(Session["LastDay"]);
Response.Write(“FirstDay:”+Session["FirstDay"].ToString() + “<br />”);
Response.Write(“LastDay:”+Session["LastDay"].ToString() + “<br />”);
for (DateTime i = FirstDate; i <= LastDate; )
{
DateTime WeekStart = i;
DateTime WeekEnd = i.AddDays(6);
Response.Write(“Week Start: ” + WeekStart.ToShortDateString() + “<br />”);
Response.Write(“WeekEnd: ” + WeekEnd.ToShortDateString() + “<br /><br />”);
i = i.AddDays(7);
}
}
}

I have also attached screen for better understand. I hope this will be helpful for you guys.

Thanks

Filed under: Asp.Net, C#.Net, Web Development, Get Dates from Calender control, Get First and Last Date from Asp.Net Calender control, How to get First Date and Last Date from Calender control in asp.net

Encrypt and Decrypt values in C#.Net

This article gives a brief overview of Cryptography and the Cryptography support provided by the .NET Framework. I begin by introducing Cryptography and then proceed to examine the various types of it. In particular, I review and analyze the various cryptography algorithms and objects supported by .NET. I conclude after proposing and briefly discussing the algorithmic technique that would work best for you.

Please find below a  simple code for how to do encrypt and decrypt values in c#.net

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

namespace Test
{
public class EncryptDecrypt
{
#region Declaration
static byte[] TripleDESKey1 = new byte[] { 51, 11, 17, 11, 31, 31, 37, 7, 23, 13, 23, 31, 43, 41, 7, 19, 91, 91, 47, 7, 37, 13, 19, 41 };
static byte[] TripleDESIV1 = new byte[] { 55, 13, 17, 31, 41, 51, 23, 7 };

#endregion

/// <summary>
/// To Encrypt String
/// </summary>
/// <param name=”value”>String To Encrypt</param>
/// <returns>Returns Encrypted String</returns>
public static string ToEncrypt(string value)
{
System.Security.Cryptography.TripleDESCryptoServiceProvider des = new System.Security.Cryptography.TripleDESCryptoServiceProvider();

//des.GenerateIV();
//des.GenerateKey();

des.Key = TripleDESKey1;
des.IV = TripleDESIV1;
//TripleDESKey1 = des.Key;//To Store Current Key To Use it in Decryption
//TripleDESIV1 = des.IV;//To Store Current IV To Use it in Decryption

System.IO.MemoryStream ms;

if (value.Length >= 1)
ms = new System.IO.MemoryStream(((value.Length * 2) – 1));
else
ms = new System.IO.MemoryStream();

ms.Position = 0;
System.Security.Cryptography.CryptoStream encStream = new System.Security.Cryptography.CryptoStream(ms, des.CreateEncryptor(), System.Security.Cryptography.CryptoStreamMode.Write);
byte[] plainBytes = System.Text.Encoding.UTF8.GetBytes(value);
encStream.Write(plainBytes, 0, plainBytes.Length);
encStream.FlushFinalBlock();
encStream.Close();

return Convert.ToBase64String(plainBytes);
}

/// <summary>
/// To Decrypt Data Encrypted From TripleDEC Algoritham
/// </summary>
/// <param name=”value”>String Value To Decrypt</param>
/// <returns>Return Decrypted Data</returns>
public static string ToDecrypt(string value)
{
try
{
System.Security.Cryptography.TripleDESCryptoServiceProvider des = new System.Security.Cryptography.TripleDESCryptoServiceProvider();
//System.IO.MemoryStream ms = new System.IO.MemoryStream(((value.Length * 2) – 1));
System.IO.MemoryStream ms;
if (value.Length >= 1)
ms = new System.IO.MemoryStream(((value.Length * 2) – 1));
else
ms = new System.IO.MemoryStream();

ms.Position = 0;
System.Security.Cryptography.CryptoStream encStream = new System.Security.Cryptography.CryptoStream(ms, des.CreateDecryptor(TripleDESKey1, TripleDESIV1), System.Security.Cryptography.CryptoStreamMode.Write);
byte[] plainBytes = Convert.FromBase64String(value);
encStream.Write(plainBytes, 0, plainBytes.Length);
return System.Text.Encoding.UTF8.GetString(plainBytes);
}
catch (Exception ex)
{
throw ex;
}

}
}
}

Thank you

Filed under: C#.Net, Web Development, Cryptography in asp.Net, Encrypt and Decrypt values in Asp.Net, Encrypt and Decrypt values in C#.Net