Console.BackgroundColor Proprietà
Importante
Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.
Ottiene o imposta il colore di sfondo della console.
public:
static property ConsoleColor BackgroundColor { ConsoleColor get(); void set(ConsoleColor value); };
[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public static ConsoleColor BackgroundColor { get; set; }
[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
[System.Runtime.Versioning.UnsupportedOSPlatform("android")]
[System.Runtime.Versioning.UnsupportedOSPlatform("ios")]
[System.Runtime.Versioning.UnsupportedOSPlatform("tvos")]
public static ConsoleColor BackgroundColor { get; set; }
public static ConsoleColor BackgroundColor { get; set; }
[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
static member BackgroundColor : ConsoleColor with get, set
[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
[<System.Runtime.Versioning.UnsupportedOSPlatform("android")>]
[<System.Runtime.Versioning.UnsupportedOSPlatform("ios")>]
[<System.Runtime.Versioning.UnsupportedOSPlatform("tvos")>]
static member BackgroundColor : ConsoleColor with get, set
static member BackgroundColor : ConsoleColor with get, set
Public Shared Property BackgroundColor As ConsoleColor
Valore che specifica il colore di sfondo della console; vale a dire il colore che viene visualizzato dietro ogni carattere. Il colore predefinito è nero.
- Attributi
Il colore specificato in un'operazione set non è un membro valido di ConsoleColor.
L'utente non ha l'autorizzazione per eseguire questa azione.
Si è verificato un errore di I/O.
L'esempio seguente salva i valori dell'enumerazione ConsoleColor in una matrice e archivia i valori correnti delle BackgroundColor proprietà e ForegroundColor nelle variabili. Modifica quindi il colore di primo piano in ogni colore dell'enumerazione ConsoleColor , ad eccezione del colore corrispondente allo sfondo corrente e modifica il colore di sfondo in ogni colore dell'enumerazione ConsoleColor , ad eccezione del colore corrispondente al primo piano corrente. Se il colore di primo piano è uguale al colore di sfondo, il testo non è visibile. Infine, chiama il ResetColor metodo per ripristinare i colori originali della console.
using System;
class Example
{
public static void Main()
{
// Get an array with the values of ConsoleColor enumeration members.
ConsoleColor[] colors = (ConsoleColor[]) ConsoleColor.GetValues(typeof(ConsoleColor));
// Save the current background and foreground colors.
ConsoleColor currentBackground = Console.BackgroundColor;
ConsoleColor currentForeground = Console.ForegroundColor;
// Display all foreground colors except the one that matches the background.
Console.WriteLine("All the foreground colors except {0}, the background color:",
currentBackground);
foreach (var color in colors) {
if (color == currentBackground) continue;
Console.ForegroundColor = color;
Console.WriteLine(" The foreground color is {0}.", color);
}
Console.WriteLine();
// Restore the foreground color.
Console.ForegroundColor = currentForeground;
// Display each background color except the one that matches the current foreground color.
Console.WriteLine("All the background colors except {0}, the foreground color:",
currentForeground);
foreach (var color in colors) {
if (color == currentForeground) continue;
Console.BackgroundColor = color;
Console.WriteLine(" The background color is {0}.", color);
}
// Restore the original console colors.
Console.ResetColor();
Console.WriteLine("\nOriginal colors restored...");
}
}
//The example displays output like the following:
// All the foreground colors except DarkCyan, the background color:
// The foreground color is Black.
// The foreground color is DarkBlue.
// The foreground color is DarkGreen.
// The foreground color is DarkRed.
// The foreground color is DarkMagenta.
// The foreground color is DarkYellow.
// The foreground color is Gray.
// The foreground color is DarkGray.
// The foreground color is Blue.
// The foreground color is Green.
// The foreground color is Cyan.
// The foreground color is Red.
// The foreground color is Magenta.
// The foreground color is Yellow.
// The foreground color is White.
//
// All the background colors except White, the foreground color:
// The background color is Black.
// The background color is DarkBlue.
// The background color is DarkGreen.
// The background color is DarkCyan.
// The background color is DarkRed.
// The background color is DarkMagenta.
// The background color is DarkYellow.
// The background color is Gray.
// The background color is DarkGray.
// The background color is Blue.
// The background color is Green.
// The background color is Cyan.
// The background color is Red.
// The background color is Magenta.
// The background color is Yellow.
//
// Original colors restored...
open System
// Get an array with the values of ConsoleColor enumeration members.
let colors = ConsoleColor.GetValues<ConsoleColor>()
// Save the current background and foreground colors.
let currentBackground = Console.BackgroundColor
let currentForeground = Console.ForegroundColor
// Display all foreground colors except the one that matches the background.
printfn $"All the foreground colors except {currentBackground}, the background color:"
for color in colors do
if color <> currentBackground then
Console.ForegroundColor <- color
printfn $" The foreground color is {color}."
printfn ""
// Restore the foreground color.
Console.ForegroundColor <- currentForeground;
// Display each background color except the one that matches the current foreground color.
printfn $"All the background colors except {currentForeground}, the foreground color:"
for color in colors do
if color <> currentForeground then
Console.BackgroundColor <- color
printfn $" The background color is {color}."
// Restore the original console colors.
Console.ResetColor()
printfn "\nOriginal colors restored..."
//The example displays output like the following:
// All the foreground colors except DarkCyan, the background color:
// The foreground color is Black.
// The foreground color is DarkBlue.
// The foreground color is DarkGreen.
// The foreground color is DarkRed.
// The foreground color is DarkMagenta.
// The foreground color is DarkYellow.
// The foreground color is Gray.
// The foreground color is DarkGray.
// The foreground color is Blue.
// The foreground color is Green.
// The foreground color is Cyan.
// The foreground color is Red.
// The foreground color is Magenta.
// The foreground color is Yellow.
// The foreground color is White.
//
// All the background colors except White, the foreground color:
// The background color is Black.
// The background color is DarkBlue.
// The background color is DarkGreen.
// The background color is DarkCyan.
// The background color is DarkRed.
// The background color is DarkMagenta.
// The background color is DarkYellow.
// The background color is Gray.
// The background color is DarkGray.
// The background color is Blue.
// The background color is Green.
// The background color is Cyan.
// The background color is Red.
// The background color is Magenta.
// The background color is Yellow.
//
// Original colors restored...
Public Module Example
Public Sub Main()
' Get an array with the values of ConsoleColor enumeration members.
Dim colors() As ConsoleColor = ConsoleColor.GetValues(GetType(ConsoleColor))
' Save the current background and foreground colors.
Dim currentBackground As ConsoleColor = Console.BackgroundColor
Dim currentForeground As ConsoleColor = Console.ForegroundColor
' Display all foreground colors except the one that matches the background.
Console.WriteLine("All the foreground colors except {0}, the background color:",
currentBackground)
For Each color In colors
If color = currentBackground Then Continue For
Console.ForegroundColor = color
Console.WriteLine(" The foreground color is {0}.", color)
Next
Console.WriteLine()
' Restore the foreground color.
Console.ForegroundColor = currentForeground
' Display each background color except the one that matches the current foreground color.
Console.WriteLine("All the background colors except {0}, the foreground color:",
currentForeground)
For Each color In colors
If color = currentForeground then Continue For
Console.BackgroundColor = color
Console.WriteLine(" The background color is {0}.", color)
Next
' Restore the original console colors.
Console.ResetColor
Console.WriteLine()
Console.WriteLine("Original colors restored...")
End Sub
End Module
'The example displays output like the following:
' The background color is DarkCyan.
' The background color is DarkRed.
' The background color is DarkMagenta.
' The background color is DarkYellow.
' The background color is Gray.
' The background color is DarkGray.
' The background color is Blue.
' The background color is Green.
' The background color is Cyan.
' The background color is Red.
' The background color is Magenta.
' The background color is Yellow.
'
' Original colors restored...
Una modifica alla proprietà influisce solo sull'output BackgroundColor scritto in singole celle di caratteri dopo la modifica del colore di sfondo. Per modificare il colore di sfondo della finestra della console nel suo complesso, impostare la BackgroundColor proprietà e chiamare il Clear metodo . Nell'esempio seguente viene illustrato questo concetto.
using System;
public class Example
{
public static void Main()
{
WriteCharacterStrings(1, 26, true);
Console.MoveBufferArea(0, Console.CursorTop - 10, 30, 1,
Console.CursorLeft, Console.CursorTop + 1);
Console.CursorTop = Console.CursorTop + 3;
Console.WriteLine("Press any key...");
Console.ReadKey();
Console.Clear();
WriteCharacterStrings(1, 26, false);
}
private static void WriteCharacterStrings(int start, int end,
bool changeColor)
{
for (int ctr = start; ctr <= end; ctr++) {
if (changeColor)
Console.BackgroundColor = (ConsoleColor) ((ctr - 1) % 16);
Console.WriteLine(new String((char)(ctr + 64), 30));
}
}
}
open System
let writeCharacterStrings start end' changeColor =
for i = start to end' do
if changeColor then
Console.BackgroundColor <- (i - 1) % 16 |> enum
Console.WriteLine(String(char (i + 64), 30))
writeCharacterStrings 1 26 true
Console.MoveBufferArea(0, Console.CursorTop - 10, 30, 1, Console.CursorLeft, Console.CursorTop + 1)
Console.CursorTop <- Console.CursorTop + 3
Console.WriteLine "Press any key..."
Console.ReadKey() |> ignore
Console.Clear()
writeCharacterStrings 1 26 false
Module Example
Public Sub Main()
WriteCharacterStrings(1, 26, True)
Console.MoveBufferArea(0, Console.CursorTop - 10, 30, 1, Console.CursorLeft, Console.CursorTop + 1)
Console.CursorTop = Console.CursorTop + 3
Console.WriteLine("Press any key...") : Console.ReadKey()
Console.Clear()
WriteCharacterStrings(1, 26, False)
End Sub
Private Sub WriteCharacterStrings(start As Integer, _end As Integer,
changeColor As Boolean)
For ctr As Integer = start To _end
If changeColor Then
Console.BackgroundColor = CType((ctr - 1) Mod 16, ConsoleColor)
End If
Console.WriteLine(New String(Convert.ToChar(ctr + 64), 30))
Next
End Sub
End Module
Un'operazione get per un'applicazione basata su Windows, in cui non esiste una console, restituisce ConsoleColor.Black.
I sistemi Unix non forniscono alcun meccanismo generale per recuperare i colori correnti della console. Per questo motivo, BackgroundColor restituisce (ConsoleColor)-1
finché non viene impostato in modo esplicito (usando il setter).
Prodotto | Versioni |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.3, 1.4, 1.6, 2.0, 2.1 |
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