String::Join Method (String, array<String>, Int32, Int32)
Concatenates the specified elements of a string array, using the specified separator between each element.
Assembly: mscorlib (in mscorlib.dll)
public: static String^ Join( String^ separator, array<String^>^ value, int startIndex, int count )
Parameters
- separator
- Type: System::String
The string to use as a separator.
- value
- Type: array<System::String>
An array that contains the elements to concatenate.
- startIndex
- Type: System::Int32
The first element in value to use.
- count
- Type: System::Int32
The number of elements of value to use.
Return Value
Type: System::StringA string that consists of the strings in value delimited by the separator string.
-or-
String::Empty if count is zero, value has no elements, or separator and all the elements of value are String::Empty.
| Exception | Condition |
|---|---|
| ArgumentNullException | value is nullptr. |
| ArgumentOutOfRangeException | startIndex or count is less than 0. -or- startIndex plus count is greater than the number of elements in value. |
| OutOfMemoryException | Out of memory. |
For example, if separator is ", " and the elements of value are "apple", "orange", "grape", and "pear", Join(separator, value, 1, 2) returns "orange, grape".
If separator is nullptr, an empty string (String::Empty) is used instead. If any element in value is nullptr, an empty string is used instead.
The following example concatenates two elements from an array of names of fruit.
// Sample for String::Join(String, String[], int int) using namespace System; int main() { array<String^>^val = {"apple","orange","grape","pear"}; String^ sep = ", "; String^ result; Console::WriteLine( "sep = '{0}'", sep ); Console::WriteLine( "val[] = {{'{0}' '{1}' '{2}' '{3}'}}", val[ 0 ], val[ 1 ], val[ 2 ], val[ 3 ] ); result = String::Join( sep, val, 1, 2 ); Console::WriteLine( "String::Join(sep, val, 1, 2) = '{0}'", result ); } /* This example produces the following results: sep = ', ' val[] = {'apple' 'orange' 'grape' 'pear'} String::Join(sep, val, 1, 2) = 'orange, grape' */
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.