C# Get/Retrieve Week In Month And Week In Year

*Note get DayOfWeek, Week In Month, Week In Year, Today Date, Today Month, Today Year, Today Time And Format.

Using 

using System.Globalization;

Function


        public static int Iso8601WeekNumber(DateTime dt)
        {
            System.Globalization.CultureInfo ci = System.Threading.Thread.CurrentThread.CurrentCulture;
            int weekNumOnMonth = ci.Calendar.GetWeekOfYear(dt, ci.DateTimeFormat.CalendarWeekRule, ci.DateTimeFormat.FirstDayOfWeek);
            return weekNumOnMonth;
        }

        public static int GetWeekInMonth(DateTime date)
        {
            DateTime tempdate = date.AddDays(-date.Day + 1);
            CultureInfo ciCurr = CultureInfo.CurrentCulture;
            int weekNumStart = ciCurr.Calendar.GetWeekOfYear(tempdate, CalendarWeekRule.FirstFourDayWeek, ciCurr.DateTimeFormat.FirstDayOfWeek);
            int weekNum = ciCurr.Calendar.GetWeekOfYear(date, CalendarWeekRule.FirstFourDayWeek, ciCurr.DateTimeFormat.FirstDayOfWeek);
            return weekNum - weekNumStart + 1;
        }

Eg.


WeekInYear = Iso8601WeekNumber(DateTime.Now); //This Year Week
WeekInMonth = GetWeekInMonth(DateTime.Now); //This Month Week
DayOfWeek = DateTime.Now.DayOfWeek.ToString(); //Day Of Week eg.Monday
MonthOnly = DateTime.Now.Month; //Today Month
DateOnly = DateTime.Now.Day; //Today Day
YearOnly = DateTime.Now.Year; //Today Year
TimeOnly2400 = DateTime.Now.ToString("HH:mm:ss tt"); //Now Time In 2400 Format
TimeOnly1200 = DateTime.Now.ToString("h:m tt"); //Now Time In 1200 Format

C# Retrieve/Get Last Character

Way to retrieve last character of the string.

public string GetLast(string s, int tail_length)
{
            if (tail_length >= s.Length)
                return s;
            return s.Substring(s.Length - tail_length);
}

eg.


string OneYearLastChar = GetLast(System.DateTime.Now.Year.ToString(), 1);
- Get Last Character

string TwoLastChar = GetLast(System.DateTime.Now.Year.ToString(), 2);
- Get Last Two Character

C# Request.QueryString/ Get Parameter Value From URL

This request query string act as action to get url parameter.

eg. 

Request.QueryString["id"]
url: http://Sample.com&id=12345
Request.QueryString will get the value of 12345

How do we get array parameter from URL using Request.QueryString.

eg.

string[] names = Request.QueryString.GetValues("id");
names will hold the value of the parameter pass through URL.

This is the way to retrieve or get value from parameter.

Closing Webpage Without Prompt

Add Javascript to webpage


    function AssignContent()
    {
        window.open('', '_self', '');
        window.close();
    }

Add C# code at webpage aspx page.


        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                if (!ClientScript.IsClientScriptBlockRegistered("k1"))
                {
                    ClientScript.RegisterClientScriptBlock(this.GetType(), "k1", "<script language='javascript'>AssignContent();</script>");
                }
            }
        }

During form onload the webpage will close.