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

问题

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.

回答1:

Declare this in XAML page (before declaring add the reference file)

xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"

Add this inside ContentPanel

<toolkit:DatePicker  Name="datePickerOne"/>

Add this in C# page

 DateTime dte = new DateTime();
 dte = (DateTime)datePickerOne.Value;
 MessageBox.Show(dte.ToString("yyyy/MM/dd"));

Now check it.

回答2:

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

来源：https://stackoverflow.com/questions/17922312/how-to-change-the-date-from-dd-mm-yyyy-to-yyyy-mm-dd-using-c-sharp

标签

windows-phone-7

c#-4.0

windows-phone-8

datepicker