Get full name of the day C# datetime

In most C# programs while formatting the dates we need to show complete or full name of the day. Here we are going to see how “dddd” format specifier is used to show full name of the day.

Sample code to show the full name of the day [C#]

using System;
using System.Globalization;
public class Example
{
public static void Main()
{
DateTime dateToFormat =  new DateTime(2008, 8, 29, 19, 27, 15); 
Console.WriteLine(dateToFormat.ToString("dddd"));
}
}
//Output
//Friday

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Date in Month Day, Year Format (MMMM dd, yyyy)

Some times we need to show date in Month Day, Year Format like January 12, 2012. Here we will see how to format DateTime using string formatter.

Sample code to show date time in Month Day, Year format [C#]

using System;
using System.Globalization;

public class DateTimeFomrateString
{
 public static void Main()
 {
  DateTime datetoFormat = new DateTime(2012, 1, 12);
  Console.WriteLine("Today's Date is " + datetoFormat.ToString("MMMM dd, yyyy") + ".");
 }
}
//Code will display the following output:
//Today's Date is June 10, 2011.

Here MMMM is format specifier that represents month as name like for 05 it will display May. dd is format specifier from day of the month with digits from 01 to 31 and yyyy is the format specifier with four digit number like 2012.

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Date in MM-dd-yy format

Most of the time in C# code we need to format datetime as per requirement. Here we are going to discuss how to format date in MM-dd-yy format.So when we give input date as “10-29-11” then date will get formatted like “10/29/11”.

Sample code to format date in MM-dd-yy format [C#] :

using System;
using System.Globalization;

public class DateFormatSample
{
 public static void Main()
 {
  string dateToFormat = "10-29-11";
  string strFormatPattern = "MM-dd-yy";
  DateTime formattedDate;
  DateTime.TryParseExact(dateToFormat, strFormatPattern, null, 
  DateTimeStyles.None, out formattedDate);
  Console.WriteLine("Date '{0}' Formatted to {1:d}.", dateToFormat, formattedDate);
 }
}
//    output:
//    Date '12-30-11' Formatted to 12/30/2011.

Here MM displays in format 01 to 12, dd represents Day of the month with range from 01 to 31 and yy is year from 00 to 99.

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do Postback in Javascript [ASP.NET]

In this post we will see how to postback page in ASP.NET from the client side using JavaScript. In some cases we need to postback page from client side i.e. by using JavaScript.
We can use __doPostBack() to postback page from client script using JavaScript.Or we can use Page.GetPostBackEventReference() to do postback from JavaScript. When we use Page.GetPostBackEventReference() it internally get converted to __doPostBack().

Sample that shows how to do postback from JavaScript [ASP.NET, C#]:

< input type="button" id="BaseButton1" onclick="submitPage()" value="OK"/>

Now after clicking on button it will call JavaScript function that will do the postback and then in page load we will capture and perform the operation that is needed.In code behind we use Request[ "__EVENTARGUMENT"] to get the request so that we can perform some operation on that event argument.So below is JavaScript function that uses Page.GetPostBackEventReference() and do the postback from Javascript.

function submitpage() 
{ 
  // trigger postback from JavaScript
   <%= this.Page.GetPostBackEventReference(this,"Delete")%> 
} 

Here “this” parameter in Page.GetPostBackEventReference(this, “Delete”) is the controls id and referred to as __EVENTTARGET and accessed using Request[“__EVENTTARGET”] in code behind to determine which control caused postback from JavaScript.And “Delete” is __EVENTARGUMENT and accessed using Request[ "__EVENTARGUMENT"] in code behind.

So now in code behind we can check for Request[ "__EVENTARGUMENT"] and perform some operations based on that condition like:

protected void Page_Load(object sender, EventArgs e) 
{ 
string eventArg = Request["__EVENTARGUMENT"]; 
if (!String.IsNullOrEmpty(eventArg)) 
{ 
 if(eventArg == "Delete")
 DeleteRecords();
}
} 

private void DeleteRecords() 
{ 
 //Do something
} 

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List to array c#

In this post we will se how to convert list to array.We need to convert list to array many times in C# programming. Converting list to array can be done by various ways. We are going to see C# examples to convert the list to array.

we will see the way to convert list to an array. we use .ToArray() parameter less instance method that converts list to an array. Below example shows how list get converted in to array using .ToArray() method:

Example to convert list to array [C#]

using System;
using System.Collections.Generic;

class Program
{
 static void Main()
 {
  // List to convert into Array.
  List<string> lstString = new List<string>();
  lstString.Add("Convert");
  lstString.Add("List");
  lstString.Add("TO");
  lstString.Add("Array");
  // use .ToArray() Method to convert list to array
  string[] strArray = lstString.ToArray();
 }
}

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