how to convert string into date format?

Further to solution 1.

You've tagged C# in your question so you can't use CDate(selected_date) - that is a VB function (there are ways of using VB.NET functions in C# but I'm not going to say how)

There are a few ways of converting strings to dates and some are better than others in certain circumstances.

Let's start with Convert.ToDateTime

DateTime d1 = Convert.ToDateTime(selected_date);

will work with the text you have in your example (which is one of the better ways of passing dates around)
But what if string selected_date="3/30/2014"; (i.e. in numeric US format). Where I currently am, that would result in a FormatException

Quote:

String was not recognized as a valid DateTime.

So I'm going to make sure that Visual Studio knows that I want to use American date formats today by using a CultureInfo[^]

IFormatProvider CultureToUse = new System.Globalization.CultureInfo("en-US", true);
DateTime d1 = Convert.ToDateTime(d, CultureToUse);

Another way of converting a string to a date is to use DateTime.Parse. I actually prefer this to using Convert but that is mainly a subjective view. You can use CultureInfo with Parse too.

DateTime d2 = DateTime.Parse(selected_date);
DateTime d3 = DateTime.Parse(selected_date, CultureToUse);

Finally, my preferred method is to use DateTime.TryParse. Why preferred? Because it won't throw an exception, it returns true if it was able to convert the string to a date, and false if it couldn't. And yes, you can use CultureInfo with this too.

DateTime d4, d5;
Boolean b = DateTime.TryParse(selected_date, out d4);
Boolean b1 = DateTime.TryParse(selected_date, CultureToUse, System.Globalization.DateTimeStyles.None, out d5);

More info on TryParse[^] can be found on this link.

string myDate = "21-07-2006";
DateTime myDateTime = DateTime.Parse(myDate);


myDate = DateTime.ParseExact(value, "MM/yy", System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.None);

[Edit member="Tadit"]
Added pre tags.
[/Edit]

The simplest way
DateTime dt = (DateTime)Convert.ChangeType("stringWhichreRresentDateTime", typeof(DateTime));

You can use these methods for string to date conversion

CDate(selected_date)

or

Convert.ToDateTime(selected_date)

[Edit member="Tadit"]
Added pre tags.
[/Edit]

Here are useful date formats
ASP DATES

string selected_date="23-March-2014";

String selected_date= DateTime.Now.ToString("dd-MMMM-yyyy");

This code will return current date with your desired format 23-March-2014

hope this helps

Convert.ToDateTime(TxtBirthDate.Text);

[Edit member="Tadit"]
Added pre tags.
[/Edit]

try this

http://www.dotnetperls.com/datetime-parse[^]