Concatenates one or more instances of String, or the String representations of the values of one or more instances of Object.

Overload List

Creates the String representation of a specified object.

Supported by the .NET Compact Framework.

[Visual Basic] Overloads Public Shared Function Concat(Object) As String

[C#] public static string Concat(object);

[C++] public: static String* Concat(Object*);

[JScript] public static function Concat(Object) : String;

Concatenates the String representations of the elements in a specified Object array.

Supported by the .NET Compact Framework.

[Visual Basic] Overloads Public Shared Function Concat(ParamArray Object()) As String

[C#] public static string Concat(params object[]);

[C++] public: static String* Concat(Object*[]);

[JScript] public static function Concat(Object[]) : String;

Concatenates the elements of a specified String array.

Supported by the .NET Compact Framework.

[Visual Basic] Overloads Public Shared Function Concat(ParamArray String()) As String

[C#] public static string Concat(params string[]);

[C++] public: static String* Concat(String*[]);

[JScript] public static function Concat(String[]) : String;

Concatenates the String representations of two specified objects.

Supported by the .NET Compact Framework.

[Visual Basic] Overloads Public Shared Function Concat(Object, Object) As String

[C#] public static string Concat(object, object);

[C++] public: static String* Concat(Object*, Object*);

[JScript] public static function Concat(Object, Object) : String;

Concatenates two specified instances of String.

Supported by the .NET Compact Framework.

[Visual Basic] Overloads Public Shared Function Concat(String, String) As String

[C#] public static string Concat(string, string);

[C++] public: static String* Concat(String*, String*);

[JScript] public static function Concat(String, String) : String;

Concatenates the String representations of three specified objects.

Supported by the .NET Compact Framework.

[Visual Basic] Overloads Public Shared Function Concat(Object, Object, Object) As String

[C#] public static string Concat(object, object, object);

[C++] public: static String* Concat(Object*, Object*, Object*);

[JScript] public static function Concat(Object, Object, Object) : String;

Concatenates three specified instances of String.

Supported by the .NET Compact Framework.

[Visual Basic] Overloads Public Shared Function Concat(String, String, String) As String

[C#] public static string Concat(string, string, string);

[C++] public: static String* Concat(String*, String*, String*);

[JScript] public static function Concat(String, String, String) : String;

[C++] Concatenates the String representations of three specified objects and a variable-length parameter list. This method is not CLS-compliant.

[C++] public: static String* Concat(Object*, Object*, Object*, Object*, ...);

Concatenates four specified instances of String.

Supported by the .NET Compact Framework.

[Visual Basic] Overloads Public Shared Function Concat(String, String, String, String) As String

[C#] public static string Concat(string, string, string, string);

[C++] public: static String* Concat(String*, String*, String*, String*);

[JScript] public static function Concat(String, String, String, String) : String;

Example

[Visual Basic, C#, C++] The following example demonstrates the Concat method.

[Visual Basic, C#, C++] Note   This example shows how to use one of the overloaded versions of Concat. For other examples that might be available, see the individual overload topics.

[Visual Basic] 
Imports System
Imports Microsoft.VisualBasic
 _

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, o))
      
      Console.WriteLine(vbCrLf & "Concatenate a 3 element object array:")
      Console.WriteLine("5) {0}", [String].Concat(objs))
   End Sub 'Main
End Class 'stringConcat5
'
'This example produces 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) -123-123-123-123-123
'
'Concatenate a 3 element object array:
'5) -123-456-789
'

[C#] 
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, o));

    Console.WriteLine("\nConcatenate a 3 element object array:");
    Console.WriteLine("5) {0}", String.Concat(objs));
    }
}
/*
This example produces 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) -123-123-123-123-123

Concatenate a 3 element object array:
5) -123-456-789
*/

[C++] 
#using <mscorlib.dll>

using namespace System;

void main() {
   int i = -123;
   Object* o = __box(i);
   Object* objs[] = {__box(-123), __box(-456), __box(-789)};

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

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

   Console::WriteLine(S"\nConcatenate a 3 element Object* array:");
   Console::WriteLine(S"5) {0}", String::Concat(objs));
}
/*
This example produces 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) -123-123-123-123-123

Concatenate a 3 element Object* array:
5) -123-456-789
*/

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button in the upper-left corner of the page.

See Also

String Class | String Members | System Namespace