String.Concat String.Concat String.Concat String.Concat Method

Definición

Concatena una o más instancias de String o las representaciones de tipo String de los valores de una o más instancias de Object.Concatenates one or more instances of String, or the String representations of the values of one or more instances of Object.

Sobrecargas

Concat(String, String, String, String) Concat(String, String, String, String) Concat(String, String, String, String) Concat(String, String, String, String)

Concatena cuatro instancias de String especificadas.Concatenates four specified instances of String.

Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>)
Concat(Object, Object, Object, Object) Concat(Object, Object, Object, Object) Concat(Object, Object, Object, Object) Concat(Object, Object, Object, Object)

Concatena las representaciones de cadena de cuatro objetos especificados y cualquier otro objeto especificado en una lista opcional de parámetros de longitud variable.Concatenates the string representations of four specified objects and any objects specified in an optional variable length parameter list.

Concat(String, String, String) Concat(String, String, String) Concat(String, String, String) Concat(String, String, String)

Concatena tres instancias de String especificadas.Concatenates three specified instances of String.

Concat(Object, Object, Object) Concat(Object, Object, Object) Concat(Object, Object, Object) Concat(Object, Object, Object)

Concatena las representaciones de cadena de tres objetos especificados.Concatenates the string representations of three specified objects.

Concat(String, String) Concat(String, String) Concat(String, String) Concat(String, String)

Concatena dos instancias de String especificadas.Concatenates two specified instances of String.

Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>)
Concat(Object, Object) Concat(Object, Object) Concat(Object, Object) Concat(Object, Object)

Concatena las representaciones de cadena de dos objetos especificados.Concatenates the string representations of two specified objects.

Concat(String[]) Concat(String[]) Concat(String[]) Concat(String[])

Concatena los elementos en una matriz String especificada.Concatenates the elements of a specified String array.

Concat(Object[]) Concat(Object[]) Concat(Object[]) Concat(Object[])

Concatena las representaciones de cadena de los elementos de una matriz Object especificada.Concatenates the string representations of the elements in a specified Object array.

Concat(Object) Concat(Object) Concat(Object) Concat(Object)

Crea la representación de cadena de un objeto especificado.Creates the string representation of a specified object.

Concat(IEnumerable<String>) Concat(IEnumerable<String>) Concat(IEnumerable<String>) Concat(IEnumerable<String>)

Concatena los miembros de una colección IEnumerable<T> construida de tipo String.Concatenates the members of a constructed IEnumerable<T> collection of type String.

Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>)
Concat<T>(IEnumerable<T>) Concat<T>(IEnumerable<T>) Concat<T>(IEnumerable<T>) Concat<T>(IEnumerable<T>)

Concatena los miembros de una implementación de IEnumerable<T>.Concatenates the members of an IEnumerable<T> implementation.

Concat(String, String, String, String) Concat(String, String, String, String) Concat(String, String, String, String) Concat(String, String, String, String)

Concatena cuatro instancias de String especificadas.Concatenates four specified instances of String.

public:
 static System::String ^ Concat(System::String ^ str0, System::String ^ str1, System::String ^ str2, System::String ^ str3);
public static string Concat (string str0, string str1, string str2, string str3);
static member Concat : string * string * string * string -> string
Public Shared Function Concat (str0 As String, str1 As String, str2 As String, str3 As String) As String

Parámetros

str0
String String String String

Primera cadena que se va a concatenar.The first string to concatenate.

str1
String String String String

Segunda cadena que se va a concatenar.The second string to concatenate.

str2
String String String String

Tercera cadena que se va a concatenar.The third string to concatenate.

str3
String String String String

Cuarta cadena que se va a concatenar.The fourth string to concatenate.

Devoluciones

Concatenación de str0, str1, str2, y str3.The concatenation of str0, str1, str2, and str3.

Ejemplos

El ejemplo siguiente define una matriz de palabras de cuatro – letras y almacena las letras individuales a una matriz de cadenas para codificarlas.The following example defines an array of four-letter words and stores their individual letters to a string array in order to scramble them. A continuación, llama el Concat(String, String, String, String) método para volver a ensamblar las palabras codificadas.It then calls the Concat(String, String, String, String) method to reassemble the scrambled words.

using System;
using System.Collections;

public class Example
{
   public static void Main()
   {
      const int WORD_SIZE = 4;
      
      // Define some 4-letter words to be scrambled.
      string[] words = { "home", "food", "game", "rest" };
      // Define two arrays equal to the number of letters in each word.
      double[] keys = new double[WORD_SIZE];
      string[] letters = new string[WORD_SIZE];
      // Initialize the random number generator.
      Random rnd = new Random();
      
      // Scramble each word.
      foreach (string word in words)
      {
         for (int ctr = 0; ctr < word.Length; ctr++)
         {
            // Populate the array of keys with random numbers.
            keys[ctr] = rnd.NextDouble();
            // Assign a letter to the array of letters.
            letters[ctr] = word[ctr].ToString();
         }   
         // Sort the array. 
         Array.Sort(keys, letters, 0, WORD_SIZE, Comparer.Default);      
         // Display the scrambled word.
         string scrambledWord = String.Concat(letters[0], letters[1], 
                                              letters[2], letters[3]);
         Console.WriteLine("{0} --> {1}", word, scrambledWord);
      } 
   }
}
// The example displays output like the following:
//       home --> mheo
//       food --> oodf
//       game --> aemg
//       rest --> trse
Imports System.Collections

Module Example
   Public Sub Main()
      Const WORD_SIZE As Integer = 4
      
      ' Define some 4-letter words to be scrambled.
      Dim words() As String = { "home", "food", "game", "rest" }
      ' Define two arrays equal to the number of letters in each word.
      Dim keys(WORD_SIZE) As Double
      Dim letters(WORD_SIZE) As String
      ' Initialize the random number generator.
      Dim rnd As New Random()
      
      ' Scramble each word.
      For Each word As String In words
         For ctr As Integer = 0 To word.Length - 1
            ' Populate the array of keys with random numbers.
            keys(ctr) = rnd.NextDouble()
            ' Assign a letter to the array of letters.
            letters(ctr) = word.Chars(ctr)
         Next   
         ' Sort the array. 
         Array.Sort(keys, letters, 0, WORD_SIZE, Comparer.Default)      
         ' Display the scrambled word.
         Dim scrambledWord As String = String.Concat(letters(0), letters(1), _
                                                     letters(2), letters(3))
         Console.WriteLine("{0} --> {1}", word, scrambledWord)
      Next 
   End Sub
End Module 
' The example displays output like the following:
'       home --> mheo
'       food --> oodf
'       game --> aemg
'       rest --> trse

Comentarios

El método concatena str0, str1, str2, y str3; no agrega los delimitadores.The method concatenates str0, str1, str2, and str3; it does not add any delimiters.

Nota

También puede usar como operador de concatenación de cadenas de su lenguaje, + en C#, o & y + en Visual Basic)You can also use your language's string concatenation operator, such as + in C#, or & and + in Visual Basic)

, para concatenar cadenas., to concatenate strings.

Un Empty cadena se usa en lugar de un objeto nulo en la matriz.An Empty string is used in place of any null object in the array.

Consulte también:

Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>)

public:
 static System::String ^ Concat(ReadOnlySpan<char> str0, ReadOnlySpan<char> str1, ReadOnlySpan<char> str2, ReadOnlySpan<char> str3);
public static string Concat (ReadOnlySpan<char> str0, ReadOnlySpan<char> str1, ReadOnlySpan<char> str2, ReadOnlySpan<char> str3);
static member Concat : ReadOnlySpan<char> * ReadOnlySpan<char> * ReadOnlySpan<char> * ReadOnlySpan<char> -> string
Public Shared Function Concat (str0 As ReadOnlySpan(Of Char), str1 As ReadOnlySpan(Of Char), str2 As ReadOnlySpan(Of Char), str3 As ReadOnlySpan(Of Char)) As String

Parámetros

Devoluciones

Concat(Object, Object, Object, Object) Concat(Object, Object, Object, Object) Concat(Object, Object, Object, Object) Concat(Object, Object, Object, Object)

Importante

Esta API no es conforme a CLS.

Concatena las representaciones de cadena de cuatro objetos especificados y cualquier otro objeto especificado en una lista opcional de parámetros de longitud variable.Concatenates the string representations of four specified objects and any objects specified in an optional variable length parameter list.

public:
 static System::String ^ Concat(System::Object ^ arg0, System::Object ^ arg1, System::Object ^ arg2, System::Object ^ arg3);
[System.CLSCompliant(false)]
public static string Concat (object arg0, object arg1, object arg2, object arg3);
static member Concat : obj * obj * obj * obj -> string
Public Shared Function Concat (arg0 As Object, arg1 As Object, arg2 As Object, arg3 As Object) As String

Parámetros

arg0
Object Object Object Object

Primer objeto que se va a concatenar.The first object to concatenate.

arg1
Object Object Object Object

Segundo objeto que se va a concatenar.The second object to concatenate.

arg2
Object Object Object Object

Tercer objeto que se va a concatenar.The third object to concatenate.

arg3
Object Object Object Object

Cuarto objeto que se va a concatenar.The fourth object to concatenate.

Devoluciones

Representación de cadena concatenada de cada valor en la lista de parámetros.The concatenated string representation of each value in the parameter list.

Ejemplos

El ejemplo siguiente muestra el uso de la Concat(Object, Object, Object, Object) método para concatenar una lista de parámetros de variable.The following example illustrates the use of the Concat(Object, Object, Object, Object) method to concatenate a list of variable parameters. En este caso, se llama al método con nueve parámetros.In this case, the method is called with nine parameters.

using System;
using System.Collections;

public class Example
{
   public static void Main()
   {
      const int WORD_SIZE = 4;
      
      // Define some 4-letter words to be scrambled.
      string[] words = { "home", "food", "game", "rest" };
      // Define two arrays equal to the number of letters in each word.
      double[] keys = new double[WORD_SIZE];
      string[] letters = new string[WORD_SIZE];
      // Initialize the random number generator.
      Random rnd = new Random();
      
      // Scramble each word.
      foreach (string word in words)
      {
         for (int ctr = 0; ctr < word.Length; ctr++)
         {
            // Populate the array of keys with random numbers.
            keys[ctr] = rnd.NextDouble();
            // Assign a letter to the array of letters.
            letters[ctr] = word[ctr].ToString();
         }   
         // Sort the array. 
         Array.Sort(keys, letters, 0, WORD_SIZE, Comparer.Default);      
         // Display the scrambled word.
         string scrambledWord = String.Concat(letters[0], letters[1], 
                                              letters[2], letters[3]);
         Console.WriteLine("{0} --> {1}", word, scrambledWord);
      } 
   }
}
// The example displays output like the following:
//       home --> mheo
//       food --> oodf
//       game --> aemg
//       rest --> trse
Imports System.Collections

Module Example
   Public Sub Main()
      Const WORD_SIZE As Integer = 4
      
      ' Define some 4-letter words to be scrambled.
      Dim words() As String = { "home", "food", "game", "rest" }
      ' Define two arrays equal to the number of letters in each word.
      Dim keys(WORD_SIZE) As Double
      Dim letters(WORD_SIZE) As String
      ' Initialize the random number generator.
      Dim rnd As New Random()
      
      ' Scramble each word.
      For Each word As String In words
         For ctr As Integer = 0 To word.Length - 1
            ' Populate the array of keys with random numbers.
            keys(ctr) = rnd.NextDouble()
            ' Assign a letter to the array of letters.
            letters(ctr) = word.Chars(ctr)
         Next   
         ' Sort the array. 
         Array.Sort(keys, letters, 0, WORD_SIZE, Comparer.Default)      
         ' Display the scrambled word.
         Dim scrambledWord As String = String.Concat(letters(0), letters(1), _
                                                     letters(2), letters(3))
         Console.WriteLine("{0} --> {1}", word, scrambledWord)
      Next 
   End Sub
End Module 
' The example displays output like the following:
'       home --> mheo
'       food --> oodf
'       game --> aemg
'       rest --> trse

Comentarios

Nota

Esta API no es conforme a CLS.This API is not CLS-compliant. La alternativa conforme a CLS es String.Concat(Object[]).The CLS-compliant alternative is String.Concat(Object[]). Los compiladores de C# y Visual Basic resolver automáticamente una llamada a este método como una llamada a String.Concat(Object[]).The C# and Visual Basic compilers automatically resolve a call to this method as a call to String.Concat(Object[]).

El método concatena cada objeto en la lista de parámetros mediante una llamada a su sin parámetros ToString método; no agrega los delimitadores.The method concatenates each object in the parameter list by calling its parameterless ToString method; it does not add any delimiters.

String.Empty se utiliza en lugar de un argumento nulo.String.Empty is used in place of any null argument.

Nota

El último parámetro de la Concat método es una lista opcional delimitada por comas de uno o varios objetos adicionales para concatenar.The last parameter of the Concat method is an optional comma-delimited list of one or more additional objects to concatenate.

Notas a los autores de las llamadas

Este método está marcado con el vararg palabra clave, lo que significa que admite un número variable de parámetros.This method is marked with the vararg keyword, which means that it supports a variable number of parameters. El método puede llamarse desde Visual C++, pero no se puede llamar desde el código de C# o Visual Basic.The method can be called from Visual C++, but it cannot be called from C# or Visual Basic code. Los compiladores de C# y Visual Basic resolver llamadas a Concat(Object, Object, Object, Object) como llamadas a Concat(Object[]).The C# and Visual Basic compilers resolve calls to Concat(Object, Object, Object, Object) as calls to Concat(Object[]).

Concat(String, String, String) Concat(String, String, String) Concat(String, String, String) Concat(String, String, String)

Concatena tres instancias de String especificadas.Concatenates three specified instances of String.

public:
 static System::String ^ Concat(System::String ^ str0, System::String ^ str1, System::String ^ str2);
public static string Concat (string str0, string str1, string str2);
static member Concat : string * string * string -> string
Public Shared Function Concat (str0 As String, str1 As String, str2 As String) As String

Parámetros

str0
String String String String

Primera cadena que se va a concatenar.The first string to concatenate.

str1
String String String String

Segunda cadena que se va a concatenar.The second string to concatenate.

str2
String String String String

Tercera cadena que se va a concatenar.The third string to concatenate.

Devoluciones

Concatenación de str0 y str1str2.The concatenation of str0, str1, and str2.

Ejemplos

En el ejemplo siguiente se usa el Concat método para concatenar tres cadenas y muestra el resultado.The following example uses the Concat method to concatenate three strings and displays the result.

using namespace System;

void main()
{
   String^ s1 = "We went to a bookstore, ";
   String^ s2 = "a movie, ";
   String^ s3 = "and a restaurant.";

   String^ s = String::Concat(s1, s2, s3);
   Console::WriteLine(s);
}
// The example displays the following output:
//      We went to a bookstore, a movie, and a restaurant. 
using System;

public class Example
{
   public static void Main()
   {
      String s1 = "We went to a bookstore, ";
      String s2 = "a movie, ";
      String s3 = "and a restaurant.";

      var s = String.Concat(s1, s2, s3);
      Console.WriteLine(s);
   }
}
// The example displays the following output:
//      We went to a bookstore, a movie, and a restaurant. 
Imports System

Public Module Example
   Public Sub Main()
      Dim s1 As String = "We went to a bookstore, "
      Dim s2 As String = "a movie, "
      Dim s3 As String = "and a restaurant."

      Dim s = String.Concat(s1, s2, s3)
      Console.WriteLine(s)
   End Sub
End Module
' The example displays the following output:
'      We went to a bookstore, a movie, and a restaurant. 

Comentarios

El método concatena str0, str1, y str2; no agrega los delimitadores.The method concatenates str0, str1, and str2; it does not add any delimiters.

Nota

También puede usar como operador de concatenación de cadenas de su lenguaje, + en C#, o & y + en Visual Basic)You can also use your language's string concatenation operator, such as + in C#, or & and + in Visual Basic)

, para concatenar cadenas., to concatenate strings.

Un Empty cadena se usa en lugar de un argumento nulo.An Empty string is used in place of any null argument.

Consulte también:

Concat(Object, Object, Object) Concat(Object, Object, Object) Concat(Object, Object, Object) Concat(Object, Object, Object)

Concatena las representaciones de cadena de tres objetos especificados.Concatenates the string representations of three specified objects.

public:
 static System::String ^ Concat(System::Object ^ arg0, System::Object ^ arg1, System::Object ^ arg2);
public static string Concat (object arg0, object arg1, object arg2);
static member Concat : obj * obj * obj -> string
Public Shared Function Concat (arg0 As Object, arg1 As Object, arg2 As Object) As String

Parámetros

arg0
Object Object Object Object

Primer objeto que se va a concatenar.The first object to concatenate.

arg1
Object Object Object Object

Segundo objeto que se va a concatenar.The second object to concatenate.

arg2
Object Object Object Object

Tercer objeto que se va a concatenar.The third object to concatenate.

Devoluciones

Representaciones de cadena concatenadas de los valores de los parámetros arg0, arg1 y arg2.The concatenated string representations of the values of arg0, arg1, and arg2.

Ejemplos

En el ejemplo siguiente se muestra el Concat método.The following example demonstrates the Concat method.

using namespace System;

int main()
{
   int i = -123;
   Object^ o = i;
   array<Object^>^objs = { -123, -456, -789};
   Console::WriteLine("Concatenate 1, 2, and 3 objects:");
   Console::WriteLine("1) {0}", String::Concat(o));
   Console::WriteLine("2) {0}", String::Concat(o, o));
   Console::WriteLine("3) {0}", String::Concat(o, o, o));
   
   Console::WriteLine("\nConcatenate 4 objects and a variable length parameter list:" );
   Console::WriteLine("4) {0}", String::Concat(o, o, o, o));
   Console::WriteLine("5) {0}", String::Concat( o, o, o, o, o));
   Console::WriteLine("\nConcatenate a 3-element object array:");
   Console::WriteLine("6) {0}", String::Concat(objs));
}
// The example displays the following output:
//    Concatenate 1, 2, and 3 objects:
//    1) -123
//    2) -123-123
//    3) -123-123-123
//    
//    Concatenate 4 objects and a variable length parameter list:
//    4) -123-123-123-123
//    5) -123-123-123-123-123
//    
//    Concatenate a 3-element object array:
//    6) -123-456-789
using System;

class stringConcat5 {
    public static void Main() {
    int i = -123;
    Object o = i;
    Object[] objs = new Object[] {-123, -456, -789};

    Console.WriteLine("Concatenate 1, 2, and 3 objects:");
    Console.WriteLine("1) {0}", String.Concat(o));
    Console.WriteLine("2) {0}", String.Concat(o, o));
    Console.WriteLine("3) {0}", String.Concat(o, o, o));

    Console.WriteLine("\nConcatenate 4 objects and a variable length parameter list:");
    Console.WriteLine("4) {0}", String.Concat(o, o, o, o));
    Console.WriteLine("5) {0}", String.Concat(o, o, o, o, o));

    Console.WriteLine("\nConcatenate a 3-element object array:");
    Console.WriteLine("6) {0}", String.Concat(objs));
    }
}
// The example displays the following output:
//    Concatenate 1, 2, and 3 objects:
//    1) -123
//    2) -123-123
//    3) -123-123-123
//    
//    Concatenate 4 objects and a variable length parameter list:
//    4) -123-123-123-123
//    5) -123-123-123-123-123
//    
//    Concatenate a 3-element object array:
//    6) -123-456-789
Class stringConcat5
   Public Shared Sub Main()
      Dim i As Integer = - 123
      Dim o As [Object] = i
      Dim objs() As [Object] = {-123, -456, -789}
      
      Console.WriteLine("Concatenate 1, 2, and 3 objects:")
      Console.WriteLine("1) {0}", [String].Concat(o))
      Console.WriteLine("2) {0}", [String].Concat(o, o))
      Console.WriteLine("3) {0}", [String].Concat(o, o, o))
      
      Console.WriteLine(vbCrLf & "Concatenate 4 objects and a variable length parameter list:")
      Console.WriteLine("4) {0}", String.Concat(o, o, o, o))
      Console.WriteLine("5) {0}", String.Concat(o, o, o, o, o))
      
      Console.WriteLine(vbCrLf & "Concatenate a 3-element object array:")
      Console.WriteLine("6) {0}", [String].Concat(objs))
   End Sub
End Class
'The example displays the following output:
'    Concatenate 1, 2, and 3 objects:
'    1) -123
'    2) -123-123
'    3) -123-123-123
'    
'    Concatenate 4 objects and a variable length parameter list:
'    4) -123-123-123-123
'    5) -123-123-123-123-123
'         
'    Concatenate a 3-element object array:
'    6) -123-456-789

Comentarios

El método concatena arg0, arg1, y arg2 llamando al método sin parámetros ToString método de cada objeto; no agrega los delimitadores.The method concatenates arg0, arg1, and arg2 by calling the parameterless ToString method of each object; it does not add any delimiters.

String.Empty se utiliza en lugar de un argumento nulo.String.Empty is used in place of any null argument.

Consulte también:

Concat(String, String) Concat(String, String) Concat(String, String) Concat(String, String)

Concatena dos instancias de String especificadas.Concatenates two specified instances of String.

public:
 static System::String ^ Concat(System::String ^ str0, System::String ^ str1);
public static string Concat (string str0, string str1);
static member Concat : string * string -> string
Public Shared Function Concat (str0 As String, str1 As String) As String

Parámetros

str0
String String String String

Primera cadena que se va a concatenar.The first string to concatenate.

str1
String String String String

Segunda cadena que se va a concatenar.The second string to concatenate.

Devoluciones

Concatenación de str0 y str1.The concatenation of str0 and str1.

Ejemplos

El ejemplo siguiente concatena el nombre de y los apellidos de una persona.The following example concatenates a person's first, middle, and last name.

using namespace System;
int main()
{
   
   // we want to simply quickly add this person's name together
   String^ fName = "Simon";
   String^ mName = "Jake";
   String^ lName = "Harrows";
   
   // because we want a name to appear with a space in between each name, 
   // put a space on the front of the middle, and last name, allowing for
   // the fact that a space may already be there
   mName = String::Concat(  " ", mName->Trim() );
   lName = String::Concat(  " ", lName->Trim() );
   
   // this line simply concatenates the two strings
   Console::WriteLine( "Welcome to this page, '{0}'!", String::Concat( String::Concat( fName, mName ), lName ) );
}
// The example displays the following output:
//        Welcome to this page, 'Simon Jake Harrows'!
using System;

public class ConcatTest {
    public static void Main() {

        // we want to simply quickly add this person's name together
        string fName = "Simon";
        string mName = "Jake";
        string lName = "Harrows";

        // because we want a name to appear with a space in between each name, 
        // put a space on the front of the middle, and last name, allowing for
        // the fact that a space may already be there
        mName = " " + mName.Trim();
        lName = " " + lName.Trim();

        // this line simply concatenates the two strings
        Console.WriteLine("Welcome to this page, '{0}'!", string.Concat( string.Concat(fName, mName), lName ) );
    }
}
// The example displays the following output:
//        Welcome to this page, 'Simon Jake Harrows'!
Public Class ConcatTest
    Public Shared Sub Main()
        Dim fName As String = "Simon"
        Dim mName As String = "Jake"
        Dim lName As String = "Harrows"
        
        ' We want to simply quickly add this person's name together.
        ' Because we want a name to appear with a space in between each name, 
        ' we put a space on the front of the middle, and last name, allowing for
        ' the fact that a space may already be there.
        mName = " " + mName.Trim()
        lName = " " + lName.Trim()
        
        ' This line simply concatenates the two strings.
        Console.WriteLine("Welcome to this page, '{0}'!", _
                          String.Concat(String.Concat(fName, mName), lName))
    End Sub
End Class
' The example displays the following output:
'       Welcome to this page, 'Simon Jake Harrows'!

Comentarios

El método concatena str0 y str1; no agrega los delimitadores.The method concatenates str0 and str1; it does not add any delimiters.

Nota

También puede usar como operador de concatenación de cadenas de su lenguaje, + en C#, o & y + en Visual Basic)You can also use your language's string concatenation operator, such as + in C#, or & and + in Visual Basic)

, para concatenar cadenas., to concatenate strings.

Un Empty cadena se usa en lugar de un argumento nulo.An Empty string is used in place of any null argument.

Consulte también:

Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>)

public:
 static System::String ^ Concat(ReadOnlySpan<char> str0, ReadOnlySpan<char> str1, ReadOnlySpan<char> str2);
public static string Concat (ReadOnlySpan<char> str0, ReadOnlySpan<char> str1, ReadOnlySpan<char> str2);
static member Concat : ReadOnlySpan<char> * ReadOnlySpan<char> * ReadOnlySpan<char> -> string
Public Shared Function Concat (str0 As ReadOnlySpan(Of Char), str1 As ReadOnlySpan(Of Char), str2 As ReadOnlySpan(Of Char)) As String

Parámetros

Devoluciones

Concat(Object, Object) Concat(Object, Object) Concat(Object, Object) Concat(Object, Object)

Concatena las representaciones de cadena de dos objetos especificados.Concatenates the string representations of two specified objects.

public:
 static System::String ^ Concat(System::Object ^ arg0, System::Object ^ arg1);
public static string Concat (object arg0, object arg1);
static member Concat : obj * obj -> string
Public Shared Function Concat (arg0 As Object, arg1 As Object) As String

Parámetros

arg0
Object Object Object Object

Primer objeto que se va a concatenar.The first object to concatenate.

arg1
Object Object Object Object

Segundo objeto que se va a concatenar.The second object to concatenate.

Devoluciones

Representaciones de cadena concatenadas de los valores de los parámetros arg0 y arg1.The concatenated string representations of the values of arg0 and arg1.

Ejemplos

En el ejemplo siguiente se muestra el Concat método.The following example demonstrates the Concat method.

using namespace System;

int main()
{
   int i = -123;
   Object^ o = i;
   array<Object^>^objs = { -123, -456, -789};
   Console::WriteLine("Concatenate 1, 2, and 3 objects:");
   Console::WriteLine("1) {0}", String::Concat(o));
   Console::WriteLine("2) {0}", String::Concat(o, o));
   Console::WriteLine("3) {0}", String::Concat(o, o, o));
   
   Console::WriteLine("\nConcatenate 4 objects and a variable length parameter list:" );
   Console::WriteLine("4) {0}", String::Concat(o, o, o, o));
   Console::WriteLine("5) {0}", String::Concat( o, o, o, o, o));
   Console::WriteLine("\nConcatenate a 3-element object array:");
   Console::WriteLine("6) {0}", String::Concat(objs));
}
// The example displays the following output:
//    Concatenate 1, 2, and 3 objects:
//    1) -123
//    2) -123-123
//    3) -123-123-123
//    
//    Concatenate 4 objects and a variable length parameter list:
//    4) -123-123-123-123
//    5) -123-123-123-123-123
//    
//    Concatenate a 3-element object array:
//    6) -123-456-789
using System;

class stringConcat5 {
    public static void Main() {
    int i = -123;
    Object o = i;
    Object[] objs = new Object[] {-123, -456, -789};

    Console.WriteLine("Concatenate 1, 2, and 3 objects:");
    Console.WriteLine("1) {0}", String.Concat(o));
    Console.WriteLine("2) {0}", String.Concat(o, o));
    Console.WriteLine("3) {0}", String.Concat(o, o, o));

    Console.WriteLine("\nConcatenate 4 objects and a variable length parameter list:");
    Console.WriteLine("4) {0}", String.Concat(o, o, o, o));
    Console.WriteLine("5) {0}", String.Concat(o, o, o, o, o));

    Console.WriteLine("\nConcatenate a 3-element object array:");
    Console.WriteLine("6) {0}", String.Concat(objs));
    }
}
// The example displays the following output:
//    Concatenate 1, 2, and 3 objects:
//    1) -123
//    2) -123-123
//    3) -123-123-123
//    
//    Concatenate 4 objects and a variable length parameter list:
//    4) -123-123-123-123
//    5) -123-123-123-123-123
//    
//    Concatenate a 3-element object array:
//    6) -123-456-789
Class stringConcat5
   Public Shared Sub Main()
      Dim i As Integer = - 123
      Dim o As [Object] = i
      Dim objs() As [Object] = {-123, -456, -789}
      
      Console.WriteLine("Concatenate 1, 2, and 3 objects:")
      Console.WriteLine("1) {0}", [String].Concat(o))
      Console.WriteLine("2) {0}", [String].Concat(o, o))
      Console.WriteLine("3) {0}", [String].Concat(o, o, o))
      
      Console.WriteLine(vbCrLf & "Concatenate 4 objects and a variable length parameter list:")
      Console.WriteLine("4) {0}", String.Concat(o, o, o, o))
      Console.WriteLine("5) {0}", String.Concat(o, o, o, o, o))
      
      Console.WriteLine(vbCrLf & "Concatenate a 3-element object array:")
      Console.WriteLine("6) {0}", [String].Concat(objs))
   End Sub
End Class
'The example displays the following output:
'    Concatenate 1, 2, and 3 objects:
'    1) -123
'    2) -123-123
'    3) -123-123-123
'    
'    Concatenate 4 objects and a variable length parameter list:
'    4) -123-123-123-123
'    5) -123-123-123-123-123
'         
'    Concatenate a 3-element object array:
'    6) -123-456-789

Comentarios

El método concatena arg0 y arg1 llamando al método sin parámetros ToString método arg0 y arg1; no agrega los delimitadores.The method concatenates arg0 and arg1 by calling the parameterless ToString method of arg0 and arg1; it does not add any delimiters.

String.Empty se utiliza en lugar de un argumento nulo.String.Empty is used in place of any null argument.

Si cualquiera de los argumentos es una referencia de la matriz, el método concatena una cadena que representa esa matriz, en lugar de sus miembros (por ejemplo, "System.String[]").If either of the arguments is an array reference, the method concatenates a string representing that array, instead of its members (for example, "System.String[]").

Consulte también:

Concat(String[]) Concat(String[]) Concat(String[]) Concat(String[])

Importante

Esta API no es conforme a CLS.

Concatena los elementos en una matriz String especificada.Concatenates the elements of a specified String array.

public:
 static System::String ^ Concat(... cli::array <System::String ^> ^ values);
[System.CLSCompliant(false)]
public static string Concat (params string[] values);
static member Concat : string[] -> string
Public Shared Function Concat (ParamArray values As String()) As String

Parámetros

values
String[]

Matriz de instancias de cadena.An array of string instances.

Devoluciones

Elementos concatenados de values.The concatenated elements of values.

Excepciones

Ejemplos

En el ejemplo siguiente se muestra el uso de la Concat método con un String matriz.The following example demonstrates the use of the Concat method with a String array.

using namespace System;

int main()
{
   
   // Make an array of strings. Note that we have included spaces.
   array<String^>^s = { "hello ", "and ", "welcome ", "to ",
                        "this ", "demo! "};
   
   // Put all the strings together.
   Console::WriteLine( String::Concat(s) );
   
   // Sort the strings, and put them together.
   Array::Sort( s );
   Console::WriteLine( String::Concat(s));
}
// The example displays the following output:
//       hello and welcome to this demo!
//       and demo! hello this to welcome
using System;

public class Example
{
    public static void Main()
    {
        // Make an array of strings. Note that we have included spaces.
        string [] s = { "hello ", "and ", "welcome ", "to ",
                        "this ", "demo! " };

        // Put all the strings together.
        Console.WriteLine(string.Concat(s));

        // Sort the strings, and put them together.
        Array.Sort(s);
        Console.WriteLine(string.Concat(s));
    }
}
// The example displays the following output:
//       hello and welcome to this demo!
//       and demo! hello this to welcome
Public Class Example
    Public Shared Sub Main()
        ' Make an array of strings. Note that we have included spaces.
        Dim s As String() = { "hello ", "and ", "welcome ", "to ",
                              "this ", "demo! "}

        ' Put all the strings together.
        Console.WriteLine(String.Concat(s))
        
        ' Sort the strings, and put them together.
        Array.Sort(s)
        Console.WriteLine(String.Concat(s))
    End Sub
End Class
' The example displays the following output:
'       hello and welcome to this demo!
'       and demo! hello this to welcome

Comentarios

El método concatena todos los objetos de values; no agrega los delimitadores.The method concatenates each object in values; it does not add any delimiters.

Un Empty cadena se usa en lugar de un objeto nulo en la matriz.An Empty string is used in place of any null object in the array.

Consulte también:

Concat(Object[]) Concat(Object[]) Concat(Object[]) Concat(Object[])

Concatena las representaciones de cadena de los elementos de una matriz Object especificada.Concatenates the string representations of the elements in a specified Object array.

public:
 static System::String ^ Concat(... cli::array <System::Object ^> ^ args);
public static string Concat (params object[] args);
static member Concat : obj[] -> string
Public Shared Function Concat (ParamArray args As Object()) As String

Parámetros

args
Object[]

Matriz de objetos que contiene los elementos que se van a concatenar.An object array that contains the elements to concatenate.

Devoluciones

Representaciones de cadena concatenadas de los valores de los elementos de args.The concatenated string representations of the values of the elements in args.

Excepciones

Ejemplos

En el ejemplo siguiente se muestra el uso de la Concat método con un Object matriz.The following example demonstrates the use of the Concat method with an Object array.

using System;

public class ConcatTest {
    public static void Main() {
        // Create a group of objects.
        Test1 t1 = new Test1();
        Test2 t2 = new Test2();
        int i = 16;
        string s = "Demonstration";

        // Place the objects in an array.
        object [] o = { t1, i, t2, s };

        // Concatenate the objects together as a string. To do this,
        // the ToString method of each of the objects is called.
        Console.WriteLine(string.Concat(o));
    }
}

// Create two empty test classes.
class Test1 {
}

class Test2 {
}
// The example displays the following output:
//       Test116Test2Demonstration
Imports System



Public Class ConcatTest
    
    Public Shared Sub Main()
        Dim t1 As New Test1()
        Dim t2 As New Test2()
        Dim i As Integer = 16
        Dim s As String = "Demonstration"
        Dim o As Object() = {t1, i, t2, s}
        
        ' create a group of objects
        
        ' place the objects in an array
        
        ' concatenate the objects together as a string. To do this,
        ' the ToString method in the objects is called
        Console.WriteLine(String.Concat(o))
    End Sub 'Main
End Class 'ConcatTest


' imagine these test classes are full-fledged objects...
Class Test1
End Class 'Test1

Class Test2
End Class 'Test2

Comentarios

El método concatena todos los objetos de args llamando al método sin parámetros ToString método de dicho objeto; no agrega los delimitadores.The method concatenates each object in args by calling the parameterless ToString method of that object; it does not add any delimiters.

String.Empty se utiliza en lugar de un objeto nulo en la matriz.String.Empty is used in place of any null object in the array.

Notas a los autores de las llamadas

Este método no se llama al código de C++.This method is not called by C++ code. El compilador de C++ resuelve las llamadas a Concat que tiene cuatro o más parámetros de objeto como una llamada a Concat(Object, Object, Object, Object).The C++ compiler resolves calls to Concat that have four or more object parameters as a call to Concat(Object, Object, Object, Object).

Consulte también:

Concat(Object) Concat(Object) Concat(Object) Concat(Object)

Crea la representación de cadena de un objeto especificado.Creates the string representation of a specified object.

public:
 static System::String ^ Concat(System::Object ^ arg0);
public static string Concat (object arg0);
static member Concat : obj -> string
Public Shared Function Concat (arg0 As Object) As String

Parámetros

arg0
Object Object Object Object

Objeto que se va a representar, o null.The object to represent, or null.

Devoluciones

Representación de cadena del valor de arg0, o el campo si Empty si arg0 es null.The string representation of the value of arg0, or Empty if arg0 is null.

Ejemplos

En el ejemplo siguiente se muestra el Concat método.The following example demonstrates the Concat method.

using namespace System;

int main()
{
   int i = -123;
   Object^ o = i;
   array<Object^>^objs = { -123, -456, -789};
   Console::WriteLine("Concatenate 1, 2, and 3 objects:");
   Console::WriteLine("1) {0}", String::Concat(o));
   Console::WriteLine("2) {0}", String::Concat(o, o));
   Console::WriteLine("3) {0}", String::Concat(o, o, o));
   
   Console::WriteLine("\nConcatenate 4 objects and a variable length parameter list:" );
   Console::WriteLine("4) {0}", String::Concat(o, o, o, o));
   Console::WriteLine("5) {0}", String::Concat( o, o, o, o, o));
   Console::WriteLine("\nConcatenate a 3-element object array:");
   Console::WriteLine("6) {0}", String::Concat(objs));
}
// The example displays the following output:
//    Concatenate 1, 2, and 3 objects:
//    1) -123
//    2) -123-123
//    3) -123-123-123
//    
//    Concatenate 4 objects and a variable length parameter list:
//    4) -123-123-123-123
//    5) -123-123-123-123-123
//    
//    Concatenate a 3-element object array:
//    6) -123-456-789
using System;

class stringConcat5 {
    public static void Main() {
    int i = -123;
    Object o = i;
    Object[] objs = new Object[] {-123, -456, -789};

    Console.WriteLine("Concatenate 1, 2, and 3 objects:");
    Console.WriteLine("1) {0}", String.Concat(o));
    Console.WriteLine("2) {0}", String.Concat(o, o));
    Console.WriteLine("3) {0}", String.Concat(o, o, o));

    Console.WriteLine("\nConcatenate 4 objects and a variable length parameter list:");
    Console.WriteLine("4) {0}", String.Concat(o, o, o, o));
    Console.WriteLine("5) {0}", String.Concat(o, o, o, o, o));

    Console.WriteLine("\nConcatenate a 3-element object array:");
    Console.WriteLine("6) {0}", String.Concat(objs));
    }
}
// The example displays the following output:
//    Concatenate 1, 2, and 3 objects:
//    1) -123
//    2) -123-123
//    3) -123-123-123
//    
//    Concatenate 4 objects and a variable length parameter list:
//    4) -123-123-123-123
//    5) -123-123-123-123-123
//    
//    Concatenate a 3-element object array:
//    6) -123-456-789
Class stringConcat5
   Public Shared Sub Main()
      Dim i As Integer = - 123
      Dim o As [Object] = i
      Dim objs() As [Object] = {-123, -456, -789}
      
      Console.WriteLine("Concatenate 1, 2, and 3 objects:")
      Console.WriteLine("1) {0}", [String].Concat(o))
      Console.WriteLine("2) {0}", [String].Concat(o, o))
      Console.WriteLine("3) {0}", [String].Concat(o, o, o))
      
      Console.WriteLine(vbCrLf & "Concatenate 4 objects and a variable length parameter list:")
      Console.WriteLine("4) {0}", String.Concat(o, o, o, o))
      Console.WriteLine("5) {0}", String.Concat(o, o, o, o, o))
      
      Console.WriteLine(vbCrLf & "Concatenate a 3-element object array:")
      Console.WriteLine("6) {0}", [String].Concat(objs))
   End Sub
End Class
'The example displays the following output:
'    Concatenate 1, 2, and 3 objects:
'    1) -123
'    2) -123-123
'    3) -123-123-123
'    
'    Concatenate 4 objects and a variable length parameter list:
'    4) -123-123-123-123
'    5) -123-123-123-123-123
'         
'    Concatenate a 3-element object array:
'    6) -123-456-789

Comentarios

El Concat(Object) método representa arg0 como una cadena mediante una llamada a su sin parámetros ToString método.The Concat(Object) method represents arg0 as a string by calling its parameterless ToString method.

Consulte también:

Concat(IEnumerable<String>) Concat(IEnumerable<String>) Concat(IEnumerable<String>) Concat(IEnumerable<String>)

Concatena los miembros de una colección IEnumerable<T> construida de tipo String.Concatenates the members of a constructed IEnumerable<T> collection of type String.

public:
 static System::String ^ Concat(System::Collections::Generic::IEnumerable<System::String ^> ^ values);
[System.Runtime.InteropServices.ComVisible(false)]
public static string Concat (System.Collections.Generic.IEnumerable<string> values);
static member Concat : seq<string> -> string
Public Shared Function Concat (values As IEnumerable(Of String)) As String

Parámetros

values
IEnumerable<String>

Objeto de colección que implementa la interfaz IEnumerable<T> y cuyo argumento de tipo genérico es String.A collection object that implements IEnumerable<T> and whose generic type argument is String.

Devoluciones

Cadenas concatenados en values o en Empty si values es un valor de IEnumerable(Of String) vacío.The concatenated strings in values, or Empty if values is an empty IEnumerable(Of String).

Excepciones

Ejemplos

En el ejemplo siguiente se usa el algoritmo criba de Eratóstenes para calcular los números primos que son menores o iguales que 100.The following example uses the Sieve of Eratosthenes algorithm to calculate the prime numbers that are less than or equal to 100. Asigna el resultado a un List<T> objeto de tipo String, que, a continuación, pasa a la Concat(IEnumerable<String>) método.It assigns the result to a List<T> object of type String, which it then passes to the Concat(IEnumerable<String>) method.

using System;
using System.Collections.Generic;

public class Example
{
   public static void Main()
   {
      int maxPrime = 100;
      IEnumerable<String> primeList = GetPrimes(maxPrime);
      Console.WriteLine("Primes less than {0}:", maxPrime);
      Console.WriteLine("   {0}", String.Concat(primeList));
   }

   private static IEnumerable<String> GetPrimes(int maxPrime)
   {
      Array values = Array.CreateInstance(typeof(int), 
                              new int[] { maxPrime - 1}, new int[] { 2 }); 
      // Use Sieve of Erathsthenes to determine prime numbers.
      for (int ctr = values.GetLowerBound(0); ctr <= (int) Math.Ceiling(Math.Sqrt(values.GetUpperBound(0))); ctr++)
      {
                           
         if ((int) values.GetValue(ctr) == 1) continue;
         
         for (int multiplier = ctr; multiplier <=  maxPrime / 2; multiplier++)
            if (ctr * multiplier <= maxPrime)
               values.SetValue(1, ctr * multiplier);
      }      
      
      List<String> primes = new List<String>();
      for (int ctr = values.GetLowerBound(0); ctr <= values.GetUpperBound(0); ctr++)
         if ((int) values.GetValue(ctr) == 0) 
            primes.Add(ctr.ToString() + " ");
      return primes;
   }   
}
// The example displays the following output:
//    Primes less than 100:
//       2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97
Imports System.Collections.Generic

Module Example
   Public Sub Main()
      Dim maxPrime As Integer = 100
      Dim primeList As IEnumerable(Of String) = GetPrimes(maxPrime)
      Console.WriteLine("Primes less than {0}:", maxPrime)
      Console.WriteLine("   {0}", String.Concat(primeList))
   End Sub
   
   Private Function GetPrimes(maxPrime As Integer) As IEnumerable(Of String)
      Dim values As Array = Array.CreateInstance(GetType(Integer), _
                              New Integer() { maxPrime - 1}, New Integer(){ 2 }) 
      ' Use Sieve of Erathsthenes to determine prime numbers.
      For ctr As Integer = values.GetLowerBound(0) To _
                           CInt(Math.Ceiling(Math.Sqrt(values.GetUpperBound(0))))
         If CInt(values.GetValue(ctr)) = 1 Then Continue For
         
         For multiplier As Integer = ctr To maxPrime \ 2
            If ctr * multiplier <= maxPrime Then values.SetValue(1, ctr * multiplier)
         Next   
      Next      
      
      Dim primes As New List(Of String)
      For ctr As Integer = values.GetLowerBound(0) To values.GetUpperBound(0)
         If CInt(values.GetValue(ctr)) = 0 Then primes.Add(ctr.ToString() + " ")
      Next            
      Return primes
   End Function   
End Module
' The example displays the following output:
'    Primes less than 100:
'       2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97

Comentarios

El método concatena todos los objetos de values; no agrega los delimitadores.The method concatenates each object in values; it does not add any delimiters. Para especificar un delimitador entre cada miembro del values, llame a la Join(String, IEnumerable<String>) método.To specify a delimiter between each member of values, call the Join(String, IEnumerable<String>) method.

Un Empty cadena se usa en lugar de cualquier elemento null en values.An Empty string is used in place of any null element in values.

Si values está vacío IEnumerable(Of String), el método devuelve String.Empty.If values is an empty IEnumerable(Of String), the method returns String.Empty. Si values es null, el método produce una ArgumentNullException excepción.If values is null, the method throws an ArgumentNullException exception.

Concat(IEnumerable<String>) es un método de conveniencia que le permite concatenar cada elemento de un IEnumerable(Of String) colección sin convertir primero los elementos en una matriz de cadenas.Concat(IEnumerable<String>) is a convenience method that lets you concatenate each element in an IEnumerable(Of String) collection without first converting the elements to a string array. Es especialmente útil con expresiones de consulta de Language-Integrated Query (LINQ).It is particularly useful with Language-Integrated Query (LINQ) query expressions. En el ejemplo siguiente se pasa un List(Of String) objeto que contiene las letras mayúsculas o minúsculas del alfabeto a una expresión lambda que selecciona las letras que sean igual o mayor que una letra determinada (que, en el ejemplo, es "M").The following example passes a List(Of String) object that contains either the uppercase or lowercase letters of the alphabet to a lambda expression that selects letters that are equal to or greater than a particular letter (which, in the example, is "M"). El IEnumerable(Of String) colección devuelto por la Enumerable.Where método se pasa a la Concat(IEnumerable<String>) método para mostrar el resultado como una sola cadena.The IEnumerable(Of String) collection that is returned by the Enumerable.Where method is passed to the Concat(IEnumerable<String>) method to display the result as a single string.

using System;
using System.Collections.Generic;
using System.Linq;

public class Example
{
   public static void Main()
   {
      string output = String.Concat( GetAlphabet(true).Where( letter => 
                      letter.CompareTo("M") >= 0));
      Console.WriteLine(output);  
   }

   private static List<string> GetAlphabet(bool upper)
   {
      List<string> alphabet = new List<string>();
      int charValue = upper ? 65 : 97;
      for (int ctr = 0; ctr <= 25; ctr++)
         alphabet.Add(Convert.ToChar(charValue + ctr).ToString());
      return alphabet; 
   }
}
// The example displays the following output:
//      MNOPQRSTUVWXYZ
Imports System.Collections.Generic
Imports System.Linq

Module modMain
   Public Sub Main()
      Dim output As String = String.Concat(GetAlphabet(true).Where(Function(letter) _
                                                         letter >= "M"))
        
      Console.WriteLine(output)                                     
   End Sub
   
   Private Function GetAlphabet(upper As Boolean) As List(Of String)
      Dim alphabet As New List(Of String)
      Dim charValue As Integer = CInt(IIf(upper, 65, 97))
      For ctr As Integer = 0 To 25
         alphabet.Add(ChrW(charValue + ctr).ToString())
      Next
      Return alphabet 
   End Function
End Module
' The example displays the following output:
'       MNOPQRSTUVWXYZ

Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>) Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>)

public:
 static System::String ^ Concat(ReadOnlySpan<char> str0, ReadOnlySpan<char> str1);
public static string Concat (ReadOnlySpan<char> str0, ReadOnlySpan<char> str1);
static member Concat : ReadOnlySpan<char> * ReadOnlySpan<char> -> string
Public Shared Function Concat (str0 As ReadOnlySpan(Of Char), str1 As ReadOnlySpan(Of Char)) As String

Parámetros

Devoluciones

Concat<T>(IEnumerable<T>) Concat<T>(IEnumerable<T>) Concat<T>(IEnumerable<T>) Concat<T>(IEnumerable<T>)

Concatena los miembros de una implementación de IEnumerable<T>.Concatenates the members of an IEnumerable<T> implementation.

public:
generic <typename T>
 static System::String ^ Concat(System::Collections::Generic::IEnumerable<T> ^ values);
[System.Runtime.InteropServices.ComVisible(false)]
public static string Concat<T> (System.Collections.Generic.IEnumerable<T> values);
static member Concat : seq<'T> -> string
Public Shared Function Concat(Of T) (values As IEnumerable(Of T)) As String

Parámetros de tipo

T

Tipo de los miembros de values.The type of the members of values.

Parámetros

values
IEnumerable<T> IEnumerable<T> IEnumerable<T> IEnumerable<T>

Objeto de colección que implementa la interfaz IEnumerable<T>.A collection object that implements the IEnumerable<T> interface.

Devoluciones

Miembros concatenados de values.The concatenated members in values.

Excepciones

Ejemplos

En el ejemplo siguiente se define un método muy sencillo Animal clase que contiene el nombre de un animal y el orden al que pertenece.The following example defines a very simple Animal class that contains the name of an animal and the order to which it belongs. A continuación, define un List<T> objeto para contener un número de Animal objetos.It then defines a List<T> object to contain a number of Animal objects. El Enumerable.Where se denomina método de extensión para extraer el Animal objetos cuya propiedad Order propiedad es igual a "Roedor".The Enumerable.Where extension method is called to extract the Animal objects whose Order property equals "Rodent". El resultado se pasa a la Concat<T>(IEnumerable<T>) método y se muestra en la consola.The result is passed to the Concat<T>(IEnumerable<T>) method and displayed to the console.

using System;
using System.Collections.Generic;
using System.Linq;

public class Animal
{
   public string Kind;
   public string Order;
   
   public Animal(string kind, string order)
   {
      this.Kind = kind;
      this.Order = order;
   }
   
   public override string ToString()
   {
      return this.Kind;
   }
}

public class Example
{
   public static void Main()
   {
      List<Animal> animals = new List<Animal>();
      animals.Add(new Animal("Squirrel", "Rodent"));
      animals.Add(new Animal("Gray Wolf", "Carnivora"));
      animals.Add(new Animal("Capybara", "Rodent"));
      string output = String.Concat(animals.Where( animal => 
                      (animal.Order == "Rodent")));
      Console.WriteLine(output);  
   }
}
// The example displays the following output:
//      SquirrelCapybara
Imports System.Collections.Generic

Public Class Animal
   Public Kind As String
   Public Order As String
   
   Public Sub New(kind As String, order As String)
      Me.Kind = kind
      Me.Order = order
   End Sub
   
   Public Overrides Function ToString() As String
      Return Me.Kind
   End Function
End Class

Module Example
   Public Sub Main()
      Dim animals As New List(Of Animal)
      animals.Add(New Animal("Squirrel", "Rodent"))
      animals.Add(New Animal("Gray Wolf", "Carnivora"))
      animals.Add(New Animal("Capybara", "Rodent")) 
      Dim output As String = String.Concat(animals.Where(Function(animal) _
                                           animal.Order = "Rodent"))
      Console.WriteLine(output)                                           
   End Sub
End Module
' The example displays the following output:
'      SquirrelCapybara

Comentarios

El método concatena todos los objetos de values; no agrega los delimitadores.The method concatenates each object in values; it does not add any delimiters.

Un Empty cadena se usa en lugar de un argumento nulo.An Empty string is used in place of any null argument.

Concat<T>(IEnumerable<T>) es un método de conveniencia que le permite concatenar cada elemento de un IEnumerable<T> colección sin convertir primero los elementos en cadenas.Concat<T>(IEnumerable<T>) is a convenience method that lets you concatenate each element in an IEnumerable<T> collection without first converting the elements to strings. Resulta especialmente útil con expresiones de consulta de Language-Integrated Query (LINQ), como se muestra en el ejemplo siguiente.It is particularly useful with Language-Integrated Query (LINQ) query expressions, as the example illustrates. La representación de cadena de cada objeto en el IEnumerable<T> se derivó la colección mediante una llamada a ese objeto ToString método.The string representation of each object in the IEnumerable<T> collection is derived by calling that object's ToString method.

Se aplica a