How to change the date from DD/MM/YYYY to YYYY-MM-DD using C#

Question

I am using DatePicker to select the Date. So after selecting the date, I should display it through a MessageBox. I can able to display it but it is in the format DD/MM/YYYY.

And I want to display it in the format YYYY-MM-DD. So please can anyone help me to do the needful. Now I am displaying the date by using the code:

string date1 = datepicker.ValueString;
MessageBox.Show(date1);

But I can display the current date format and display it as required by using code:

string format = "yyyy-MM-dd";

string f = DateTime.Now.ToString(format);

So please help me to do the same by using DatePicker.

Answer 1

I did it by using code

<toolkit:DatePicker Name="datepicker" BorderBrush="Transparent" BorderThickness="0" Value="" Background="Transparent" TabNavigation="Cycle" Template="{StaticResource DatePickerControlTemplate1}"/>

and in CS file, I added

string format = "yyyy-MM-dd";
        string date1 = datepicker.ValueString;
        DateTime datevalue = DateTime.Parse(date1);
        string d = datevalue.ToString(format);
        MessageBox.Show(d);

and Lastly I got the required output and By the way for DatePicker we have to install WPtoolkit Package