Nullable<T>.ToString Method

public:
 override System::String ^ ToString();

public override string ToString();

public override string? ToString();

override this.ToString : unit -> string

Public Overrides Function ToString () As String

Returns

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.

Examples

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 Sample
{
 public static void Main()
 {
 DateTime? nullableDate;

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

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

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

 Console.Write("{0} ", title);
 if (String.IsNullOrEmpty(msg))
 Console.WriteLine("The nullable DateTime has no defined value.");
 else
 Console.WriteLine("The current date and time is {0}.", msg);
 }
}

/*
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.

*/

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

// Display the text representation of a nullable DateTime.
let display title dspDT =
 let msg = dspDT.ToString()

 printf $"{title} "
 if String.IsNullOrEmpty msg then
 printfn "The nullable DateTime has no defined value."
 else
 printfn $"The current date and time is {msg}."

[<EntryPoint>]
let main _ =
 // Display the current date and time.
 let nullableDate = Nullable DateTime.Now
 display "1)" nullableDate

 // Assign null (Nothing in Visual Basic) to nullableDate, then
 // display its value.
 let nullableDate = Nullable()
 display "2)" nullableDate
 0

// 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.

' This code example demonstrates the 
' Nullable<T>.ToString method.

Class Sample
 Public Shared Sub Main() 
 Dim nullableDate As Nullable(Of DateTime)
 ' Display the current date and time.
 nullableDate = DateTime.Now
 Display("1)", nullableDate)
 
 ' Assign null (Nothing in Visual Basic) to nullableDate, then 
 ' display its value.
 nullableDate = Nothing
 Display("2)", nullableDate)
 End Sub

 ' Display the text representation of a nullable DateTime.
 Public Shared Sub Display(ByVal title As String, _
 ByVal dspDT As Nullable(Of DateTime))
 Dim msg As String = dspDT.ToString()

 Console.Write("{0} ", title)
 If String.IsNullOrEmpty(msg) Then
 Console.WriteLine("The nullable DateTime has no defined value.")
 Else
 Console.WriteLine("The current date and time is {0}.", msg)
 End If
 End Sub
End Class

'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.
'

Remarks

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