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Nullable<T>.ToString Method

July 28, 2014

Returns the text representation of the value of the current Nullable<T> object.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public override string ToString()

Return Value

Type: System.String
The text representation of the value of the current Nullable<T> object if the HasValue property is true, or an empty string ("") if the HasValue property is false.

The ToString property returns the string yielded by calling the ToString property of the object returned by the Value property.

The following code example displays the value of the current Nullable<T> object.


// This code example demonstrates the 
// Nullable<T>.ToString method.

using System;

class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      DateTime? nullableDate;

      // Display the current date and time.
      nullableDate = DateTime.Now;
      Display(outputBlock, "1)", nullableDate);

      // Assign null (Nothing in Visual Basic) to nullableDate, then 
      // display its value.
      nullableDate = null;
      Display(outputBlock, "2)", nullableDate);
   }

   // Display the text representation of a nullable DateTime.
   public static void Display(System.Windows.Controls.TextBlock outputBlock, string title, DateTime? dspDT)
   {
      string msg = dspDT.ToString();

      outputBlock.Text += String.Format("{0} ", title);
      if (String.IsNullOrEmpty(msg))
         outputBlock.Text += "The nullable DateTime has no defined value." + "\n";
      else
         outputBlock.Text += String.Format("The current date and time is {0}.", msg) + "\n";
   }
}

/*
This code example produces the following results:

1) The current date and time is 4/19/2005 8:28:14 PM.
2) The nullable DateTime has no defined value.

*/


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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