Console.Write Method (String, Object, Object, Object)

Writes the text representation of the specified objects to the standard output stream using the specified format information.

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

'Declaration
<HostProtectionAttribute(SecurityAction.LinkDemand, UI := True)> _
Public Shared Sub Write ( _
	format As String, _
	arg0 As Object, _
	arg1 As Object, _
	arg2 As Object _
)

Parameters

format
Type: System.String

A composite format string (see Remarks).

arg0
Type: System.Object

The first object to write using format.

arg1
Type: System.Object

The second object to write using format.

arg2
Type: System.Object

The third object to write using format.

ExceptionCondition
IOException

An I/O error occurred.

ArgumentNullException

format is Nothing.

FormatException

The format specification in format is invalid.

This method uses the composite formatting feature of the .NET Framework to convert the value of an object to its text representation and embed that representation in a string. The resulting string is written to the output stream.

The format parameter consists of zero or more runs of text intermixed with zero or more indexed placeholders, called format items, that correspond to an object in the parameter list of this method. The formatting process replaces each format item with the text representation of the value of the corresponding object.

The syntax of a format item is {index[,alignment][:formatString]}, which specifies a mandatory index, the optional length and alignment of the formatted text, and an optional string of format specifier characters that govern how the value of the corresponding object is formatted.

The .NET Framework provides extensive formatting support, which is described in greater detail in the following formatting topics.

NoteNote

The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: UI. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

The following example uses the WriteLine method to demonstrate the standard formatting specifiers for numbers, dates, and enumerations.

' This code example demonstrates the Console.WriteLine() method. 
' Formatting for this example uses the "en-US" culture. 

Imports System
Imports Microsoft.VisualBasic

Class Sample
   Public Enum Color
      Yellow = 1
      Blue = 2
      Green = 3
   End Enum 'Color
   Private Shared thisDate As DateTime = DateTime.Now

   Public Shared Sub Main()
      Console.Clear()

      ' Format a negative integer or floating-point number in various ways.
      Console.WriteLine("Standard Numeric Format Specifiers")
      Console.WriteLine("(C) Currency: . . . . . . . . {0:C}" & vbCrLf & _
                        "(D) Decimal:. . . . . . . . . {0:D}" & vbCrLf & _
                        "(E) Scientific: . . . . . . . {1:E}" & vbCrLf & _
                        "(F) Fixed point:. . . . . . . {1:F}" & vbCrLf & _
                        "(G) General:. . . . . . . . . {0:G}" & vbCrLf & _
                        "    (default):. . . . . . . . {0} (default = 'G')" & vbCrLf & _
                        "(N) Number: . . . . . . . . . {0:N}" & vbCrLf & _
                        "(P) Percent:. . . . . . . . . {1:P}" & vbCrLf & _
                        "(R) Round-trip: . . . . . . . {1:R}" & vbCrLf & _
                        "(X) Hexadecimal:. . . . . . . {0:X}" & vbCrLf, _
                        - 123, - 123.45F)

      ' Format the current date in various ways.
      Console.WriteLine("Standard DateTime Format Specifiers")
      Console.WriteLine("(d) Short date: . . . . . . . {0:d}" & vbCrLf & _
                        "(D) Long date:. . . . . . . . {0:D}" & vbCrLf & _
                        "(t) Short time: . . . . . . . {0:t}" & vbCrLf & _
                        "(T) Long time:. . . . . . . . {0:T}" & vbCrLf & _
                        "(f) Full date/short time: . . {0:f}" & vbCrLf & _
                        "(F) Full date/long time:. . . {0:F}" & vbCrLf & _
                        "(g) General date/short time:. {0:g}" & vbCrLf & _
                        "(G) General date/long time: . {0:G}" & vbCrLf & _
                        "    (default):. . . . . . . . {0} (default = 'G')" & vbCrLf & _
                        "(M) Month:. . . . . . . . . . {0:M}" & vbCrLf & _
                        "(R) RFC1123:. . . . . . . . . {0:R}" & vbCrLf & _
                        "(s) Sortable: . . . . . . . . {0:s}" & vbCrLf & _
                        "(u) Universal sortable: . . . {0:u} (invariant)" & vbCrLf & _
                        "(U) Universal full date/time: {0:U}" & vbCrLf & _
                        "(Y) Year: . . . . . . . . . . {0:Y}" & vbCrLf, _
                        thisDate)

      ' Format a Color enumeration value in various ways.
      Console.WriteLine("Standard Enumeration Format Specifiers")
      Console.WriteLine("(G) General:. . . . . . . . . {0:G}" & vbCrLf & _
                        "    (default):. . . . . . . . {0} (default = 'G')" & vbCrLf & _
                        "(F) Flags:. . . . . . . . . . {0:F} (flags or integer)" & vbCrLf & _
                        "(D) Decimal number: . . . . . {0:D}" & vbCrLf & _
                        "(X) Hexadecimal:. . . . . . . {0:X}" & vbCrLf, _
                        Color.Green)
   End Sub 'Main
End Class 'Sample

'This code example produces the following results: 

'Standard Numeric Format Specifiers 
'(C) Currency: . . . . . . . . ($123.00) 
'(D) Decimal:. . . . . . . . . -123 
'(E) Scientific: . . . . . . . -1.234500E+002 
'(F) Fixed point:. . . . . . . -123.45 
'(G) General:. . . . . . . . . -123 
'    (default):. . . . . . . . -123 (default = 'G') 
'(N) Number: . . . . . . . . . -123.00 
'(P) Percent:. . . . . . . . . -12,345.00 % 
'(R) Round-trip: . . . . . . . -123.45 
'(X) Hexadecimal:. . . . . . . FFFFFF85 

'Standard DateTime Format Specifiers 
'(d) Short date: . . . . . . . 6/26/2004 
'(D) Long date:. . . . . . . . Saturday, June 26, 2004 
'(t) Short time: . . . . . . . 8:11 PM 
'(T) Long time:. . . . . . . . 8:11:04 PM 
'(f) Full date/short time: . . Saturday, June 26, 2004 8:11 PM 
'(F) Full date/long time:. . . Saturday, June 26, 2004 8:11:04 PM 
'(g) General date/short time:. 6/26/2004 8:11 PM 
'(G) General date/long time: . 6/26/2004 8:11:04 PM 
'    (default):. . . . . . . . 6/26/2004 8:11:04 PM (default = 'G') 
'(M) Month:. . . . . . . . . . June 26 
'(R) RFC1123:. . . . . . . . . Sat, 26 Jun 2004 20:11:04 GMT 
'(s) Sortable: . . . . . . . . 2004-06-26T20:11:04 
'(u) Universal sortable: . . . 2004-06-26 20:11:04Z (invariant) 
'(U) Universal full date/time: Sunday, June 27, 2004 3:11:04 AM 
'(Y) Year: . . . . . . . . . . June, 2004 

'Standard Enumeration Format Specifiers 
'(G) General:. . . . . . . . . Green 
'    (default):. . . . . . . . Green (default = 'G') 
'(F) Flags:. . . . . . . . . . Green (flags or integer) 
'(D) Decimal number: . . . . . 3 
'(X) Hexadecimal:. . . . . . . 00000003 
'

The following example illustrates the use of the Write method.

Public Class FormatConverter
   Public Shared Sub Main()
      Dim lineInput As String
      lineInput = Console.ReadLine()
      While Not lineInput Is Nothing 
         Dim fields() As String = lineInput.Split(ControlChars.Tab)
         Dim isFirstField As Boolean = True 
         Dim item As String 
         For Each item In  fields
            If isFirstField Then
               isFirstField = False 
            Else
               Console.Write(",")
            End If 
            ' If the field represents a boolean, replace with a numeric representation. 
            Try
               Console.Write(Convert.ToByte(Convert.ToBoolean(item)))
            Catch
               Console.Write(item)
            End Try 
         Next item
         Console.WriteLine()
         lineInput = Console.ReadLine()
      End While 
   End Sub 'Main
End Class 'FormatConverter

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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