String.Concat Method (array<Object>[]()[])
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Concatenates the string representations of the elements in a specified Object array.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
Public Shared Function Concat ( _
ParamArray args As Object() _
) As String
public static string Concat(
params Object[] args
)
Parameters
- args
Type: array<System..::.Object>[]()[]
An object array that contains the elements to concatenate.
Return Value
Type: System..::.String
The concatenated string representations of the values of the elements in args.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | args is nullNothingnullptra null reference (Nothing in Visual Basic). |
| OutOfMemoryException | Out of memory. |
Remarks
The method concatenates each object in argsby calling the parameterless ToString method of that object; it does not add any delimiters.
String..::.Empty is used in place of any null object in the array.
Examples
The following code example demonstrates the use of the Concat method with an Object array.
Public Class Example
Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
' Create a group of objects.
Dim t1 As New Test1()
Dim t2 As New Test2()
Dim i As Integer = 16
Dim s As String = "Demonstration"
' Place the objects in an array.
Dim o As Object() = {t1, i, t2, s}
' Concatenate the objects together as a string. To do this,
' the ToString method of each of the objects is called.
outputBlock.Text &= String.Concat(o) & vbCrLf
End Sub
End Class
' Create two empty test classes.
Class Test1
End Class
Class Test2
End Class
' The example displays the following output:
' Test116Test2Demonstration
using System;
public class Example
{
public static void Demo(System.Windows.Controls.TextBlock outputBlock)
{
// 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.
outputBlock.Text += string.Concat(o) + "\n";
}
}
// Create two empty test classes.
class Test1
{
}
class Test2
{
}
// The example displays the following output:
// Test116Test2Demonstration
Version Information
Windows Phone OS
Supported in: 8.1, 8.0, 7.1, 7.0
Platforms
Windows Phone