StringBuilder.Equals Método

Definição

Espaço de Nomes:
System.Text
Assemblagem:
netstandard.dll
Assemblagens:
mscorlib.dll, System.Runtime.dll
Assemblagem:
mscorlib.dll
Assemblagem:
System.Runtime.dll

Sobrecargas

Name Description
Equals(ReadOnlySpan<Char>)

Devolve um valor que indica se os caracteres neste caso são iguais aos caracteres num intervalo de caracteres só de leitura especificado.
Equals(StringBuilder)

Devolve um valor que indica se esta instância é igual a um objeto especificado.

Equals(ReadOnlySpan<Char>)

Devolve um valor que indica se os caracteres neste caso são iguais aos caracteres num intervalo de caracteres só de leitura especificado.

public:
 bool Equals(ReadOnlySpan<char> span);
public bool Equals(ReadOnlySpan<char> span);
override this.Equals : ReadOnlySpan<char> -> bool
Public Function Equals (span As ReadOnlySpan(Of Char)) As Boolean

Parâmetros

span
ReadOnlySpan<Char>

A extensão de caracteres para comparar com a instância atual.

Devoluções

Boolean

true se os caracteres neste caso e span forem iguais; caso contrário, false.

Observações

O Equals método realiza uma comparação ordinal para determinar se os caracteres na instância atual e span são iguais.

Aplica-se a

Equals(StringBuilder)

Devolve um valor que indica se esta instância é igual a um objeto especificado.

public:
 bool Equals(System::Text::StringBuilder ^ sb);
public bool Equals(System.Text.StringBuilder sb);
override this.Equals : System.Text.StringBuilder -> bool
Public Function Equals (sb As StringBuilder) As Boolean

Parâmetros

sb
StringBuilder

Um objeto para comparar com esta instância, ou null.

Devoluções

Boolean

Em .NET (Core), true se os caracteres nesta instância e sb forem iguais; caso contrário, false.

No .NET Framework, true se esta instância e sb têm valores iguais de string, Capacity e MaxCapacity; caso contrário, false.

Exemplos

O código seguinte utiliza o Equals método para verificar se dois StringBuilder objetos são iguais. O método é chamado repetidamente após pequenas alterações feitas a cada objeto, e os resultados são apresentados na consola.

using System;
using System.Text;

StringBuilder sb1 = new("abc");
StringBuilder sb2 = new("abc", 16);

Console.WriteLine();
Console.WriteLine($"a1) sb1.Length = {sb1.Length}, sb1.Capacity = {sb1.Capacity}");
Console.WriteLine($"a2) sb2.Length = {sb2.Length}, sb2.Capacity = {sb2.Capacity}");
Console.WriteLine($"a3) sb1.ToString() = \"{sb1}\", sb2.ToString() = \"{sb2}\"");
Console.WriteLine($"a4) sb1 equals sb2: {sb1.Equals(sb2)}");

Console.WriteLine();
Console.WriteLine("Ensure sb1 has a capacity of at least 50 characters.");
sb1.EnsureCapacity(50);

Console.WriteLine();
Console.WriteLine($"b1) sb1.Length = {sb1.Length}, sb1.Capacity = {sb1.Capacity}");
Console.WriteLine($"b2) sb2.Length = {sb2.Length}, sb2.Capacity = {sb2.Capacity}");
Console.WriteLine($"b3) sb1.ToString() = \"{sb1}\", sb2.ToString() = \"{sb2}\"");
Console.WriteLine($"b4) sb1 equals sb2: {sb1.Equals(sb2)}");
Console.WriteLine();
Console.WriteLine("Set the length of sb1 to zero.");
Console.WriteLine("Set the capacity of sb2 to 51 characters.");
sb1.Length = 0;
sb2.Capacity = 51;

Console.WriteLine();
Console.WriteLine($"c1) sb1.Length = {sb1.Length}, sb1.Capacity = {sb1.Capacity}");
Console.WriteLine($"c2) sb2.Length = {sb2.Length}, sb2.Capacity = {sb2.Capacity}");
Console.WriteLine($"c3) sb1.ToString() = \"{sb1}\", sb2.ToString() = \"{sb2}\"");
Console.WriteLine($"c4) sb1 equals sb2: {sb1.Equals(sb2)}");

/*
The example displays the following output:

a1) sb1.Length = 3, sb1.Capacity = 16
a2) sb2.Length = 3, sb2.Capacity = 16
a3) sb1.ToString() = "abc", sb2.ToString() = "abc"
a4) sb1 equals sb2: True

Ensure sb1 has a capacity of at least 50 characters.

b1) sb1.Length = 3, sb1.Capacity = 50
b2) sb2.Length = 3, sb2.Capacity = 16
b3) sb1.ToString() = "abc", sb2.ToString() = "abc"
b4) sb1 equals sb2: True (False on .NET Framework)

Set the length of sb1 to zero.
Set the capacity of sb2 to 51 characters.

c1) sb1.Length = 0, sb1.Capacity = 50
c2) sb2.Length = 3, sb2.Capacity = 51
c3) sb1.ToString() = "", sb2.ToString() = "abc"
c4) sb1 equals sb2: False
*/

open System.Text

let sb1 = StringBuilder "abc"
let sb2 = StringBuilder("abc", 16)

printfn $"a1) sb1.Length = {sb1.Length}, sb1.Capacity = {sb1.Capacity}"
printfn $"a2) sb2.Length = {sb2.Length}, sb2.Capacity = {sb2.Capacity}"
printfn $"a3) sb1.ToString() = \"{sb1}\", sb2.ToString() = \"{sb2}\""
printfn $"a4) sb1 equals sb2: {sb1.Equals sb2}"

printfn "\nEnsure sb1 has a capacity of at least 50 characters."
sb1.EnsureCapacity 50 |> ignore

printfn $"\nb1) sb1.Length = {sb1.Length}, sb1.Capacity = {sb1.Capacity}"
printfn $"b2) sb2.Length = {sb2.Length}, sb2.Capacity = {sb2.Capacity}"
printfn $"b3) sb1.ToString() = \"{sb1}\", sb2.ToString() = \"{sb2}\""
printfn $"b4) sb1 equals sb2: {sb1.Equals sb2}"

printfn "\nSet the length of sb1 to zero."
printfn "Set the capacity of sb2 to 51 characters."
sb1.Length <- 0
sb2.Capacity <- 51

printfn $"\nc1) sb1.Length = {sb1.Length}, sb1.Capacity = {sb1.Capacity}"
printfn $"c2) sb2.Length = {sb2.Length}, sb2.Capacity = {sb2.Capacity}"
printfn $"c3) sb1.ToString() = \"{sb1}\", sb2.ToString() = \"{sb2}\""
printfn $"c4) sb1 equals sb2: {sb1.Equals sb2}"

// The example displays the following output:
//       a1) sb1.Length = 3, sb1.Capacity = 16
//       a2) sb2.Length = 3, sb2.Capacity = 16
//       a3) sb1.ToString() = "abc", sb2.ToString() = "abc"
//       a4) sb1 equals sb2: True
//
//       Ensure sb1 has a capacity of at least 50 characters.
//       
//       b1) sb1.Length = 3, sb1.Capacity = 50
//       b2) sb2.Length = 3, sb2.Capacity = 16
//       b3) sb1.ToString() = "abc", sb2.ToString() = "abc"
//       b4) sb1 equals sb2: True (False on .NET Framework)
//       
//       Set the length of sb1 to zero.
//       Set the capacity of sb2 to 51 characters.
//       
//       c1) sb1.Length = 0, sb1.Capacity = 50
//       c2) sb2.Length = 3, sb2.Capacity = 51
//       c3) sb1.ToString() = "", sb2.ToString() = "abc"
//       c4) sb1 equals sb2: False

Imports System.Text

Class Sample
   Public Shared Sub Main()
      Dim sb1 As New StringBuilder("abc")
      Dim sb2 As New StringBuilder("abc", 16)
      
      Console.WriteLine()
      Console.WriteLine("a1) sb1.Length = {0}, sb1.Capacity = {1}", sb1.Length, sb1.Capacity)
      Console.WriteLine("a2) sb2.Length = {0}, sb2.Capacity = {1}", sb2.Length, sb2.Capacity)
      Console.WriteLine("a3) sb1.ToString() = ""{0}"", sb2.ToString() = ""{1}""", _
                             sb1.ToString(),           sb2.ToString())
      Console.WriteLine("a4) sb1 equals sb2: {0}", sb1.Equals(sb2))
      
      Console.WriteLine()
      Console.WriteLine("Ensure sb1 has a capacity of at least 50 characters.")
      sb1.EnsureCapacity(50)
      
      Console.WriteLine()
      Console.WriteLine("b1) sb1.Length = {0}, sb1.Capacity = {1}", sb1.Length, sb1.Capacity)
      Console.WriteLine("b2) sb2.Length = {0}, sb2.Capacity = {1}", sb2.Length, sb2.Capacity)
      Console.WriteLine("b3) sb1.ToString() = ""{0}"", sb2.ToString() = ""{1}""", _
                             sb1.ToString(),           sb2.ToString())
      Console.WriteLine("b4) sb1 equals sb2: {0}", sb1.Equals(sb2))
      
      Console.WriteLine()
      Console.WriteLine("Set the length of sb1 to zero.")
      Console.WriteLine("Set the capacity of sb2 to 51 characters.")
      sb1.Length = 0
      sb2.Capacity = 51
      
      Console.WriteLine()
      Console.WriteLine("c1) sb1.Length = {0}, sb1.Capacity = {1}", sb1.Length, sb1.Capacity)
      Console.WriteLine("c2) sb2.Length = {0}, sb2.Capacity = {1}", sb2.Length, sb2.Capacity)
      Console.WriteLine("c3) sb1.ToString() = ""{0}"", sb2.ToString() = ""{1}""", _
                             sb1.ToString(),           sb2.ToString())
      Console.WriteLine("c4) sb1 equals sb2: {0}", sb1.Equals(sb2))
   End Sub 
End Class
'The example displays the following output:
'       a1) sb1.Length = 3, sb1.Capacity = 16
'       a2) sb2.Length = 3, sb2.Capacity = 16
'       a3) sb1.ToString() = "abc", sb2.ToString() = "abc"
'       a4) sb1 equals sb2: True
'       
'       Ensure sb1 has a capacity of at least 50 characters.
'       
'       b1) sb1.Length = 3, sb1.Capacity = 50
'       b2) sb2.Length = 3, sb2.Capacity = 16
'       b3) sb1.ToString() = "abc", sb2.ToString() = "abc"
'       b4) sb1 equals sb2: True (False on .NET Framework)
'       
'       Set the length of sb1 to zero.
'       Set the capacity of sb2 to 51 characters.
'       
'       c1) sb1.Length = 0, sb1.Capacity = 50
'       c2) sb2.Length = 3, sb2.Capacity = 51
'       c3) sb1.ToString() = "", sb2.ToString() = "abc"
'       c4) sb1 equals sb2: False

Observações

.NET Framework: A instância atual e sb são iguais se tiverem valores iguais de string, Capacity e MaxCapacity. O Equals método utiliza comparação ordinal para determinar se as cordas são iguais.

.NET Core 3.0 e versões posteriores: A instância atual e sb são iguais se as cadeias atribuídas a ambos os objetos StringBuilder forem as mesmas. Para determinar a igualdade, o Equals método utiliza a comparação ordinal. Os Capacity valores das propriedades e MaxCapacity não são usados na comparação.

Aplica-se a