The String.Join Method in C#
The string.Join concatenates the elements of a specified array or the members of a collection, using the specified separator between each element or member.
Overloads of string.Join
|
Method |
Description |
|
Join(Char, Object[]) |
Concatenates the string representations of an
array of objects, using the specified separator between each member. |
|
Join(Char, String[]) |
Concatenates an array of strings, using the
specified separator between each member. |
|
Join(String, IEnumerable<String>) |
Concatenates the members of a constructed
IEnumerable<T> collection of type String, using the specified separator
between each member. |
|
Join(String, Object[]) |
Concatenates the elements of an object array,
using the specified separator between each element. |
|
Join(String, String[]) |
Concatenates all the elements of a string
array, using the specified separator between each element. |
|
Join(Char, String[], Int32, Int32) |
Concatenates an array of strings, using the
specified separator between each member, starting with the element in value
located at the startIndex position, and concatenating up to count elements. |
|
Join(String, String[], Int32, Int32) |
Concatenates the specified elements of a
string array, using the specified separator between each element. |
|
Join<T>(Char, IEnumerable<T>) |
Concatenates the members of a collection,
using the specified separator between each member. |
|
Join<T>(String, IEnumerable<T>) |
Concatenates the members of a collection,
using the specified separator between each member. |
Syntax and Examples of some join Overloads
Join(Char, Object[])
Concatenates the string
representations of an array of objects, using the specified separator between
each member.
public static string Join(char separator, params object[] values);
Parameters
Separator
Char
The character to use as a separator. Separator is
included in the returned string only if value has more than one element.
Values
Object[]
An array of objects whose string representations will
be concatenated.
Returns
String
A string that consists of the elements of values
delimited by the separator character. Or Empty if values has zero elements or
all the elements of values are null.
Exceptions
ArgumentNullException
value is null.
OutOfMemoryException
The length of the resulting string overflows the
maximum allowed length (MaxValue).
Join(Char, String[])
Concatenates an array of strings, using the specified
separator between each member.
public static string Join(char separator, params string[] value);
Parameters
Separator
Char
The
character to use as a separator. Separator is included in the returned string
only if value has more
than one element.
Value String[]
An
array of strings to concatenate.
Returns String
A string that consists of the
elements of value delimited
by the separator character.
Empty if value has zero
elements or all the elements of value are null.
Exceptions
ArgumentNullException
value is null.
OutOfMemoryException
The
length of the resulting string overflows the maximum allowed length (MaxValue).
String Join Method Example
The below code snippet is an example of using
the Join() method to append or concatenate all string array elements using
specified separator in C#.
static void Main(string[] args)
{
string[] sArr = { "Welcome", "to", "CSharp Naija" };
Console.WriteLine($"Join with Hypen: {string.Join("-", sArr)}");
string[] sArr1 = { "Musa", "Sule", "Gadabs" };
Console.WriteLine($"Join with Comma: {string.Join(",
", sArr1)}");
Console.WriteLine("\nPress Enter Key to Exit..");
Console.ReadLine();
}
Below is the output screen of the above code
Thank you
References
1. Tutlane
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