LINQ to strings is nothing but writing LINQ queries on string to get required data from string sequence. In LINQ we can write queries on strings along with traditional string functions and regular expressions to perform required operation on strings using LINQ.
Following is the syntax of writing LINQ queries on string collections.
C# Code
var result = from s in str.ToLowerInvariant().Split()
VB.NET Code
Dim result = From s In str.ToLowerInvariant().Split()
If you observe above syntax we written LINQ query on string to get distinct elements.
Following is the example of writing LINQ queries on string to split string into words in c#, vb.net
C# Code
using System;
using System.Linq;
namespace Linqtutorials
{
class Program
{
static void Main(string[] args)
{
string str = "welcome to tutlane.com";
var result = from s in str.ToLowerInvariant().Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)
select s;
foreach (var item in result)
{
Console.WriteLine(item);
}
Console.ReadLine();
}
}
}
VB.NET Code
Module Module1
Sub Main()
Dim str As String = "welcome to tutlane.com"
Dim result = From s In str.ToLowerInvariant().Split(New Char() {" "c}, StringSplitOptions.RemoveEmptyEntries)
For Each item In result
Console.WriteLine(item)
Next
Console.ReadLine()
End Sub
End Module
If you observe above example, we written simple query in LINQ to split string “str” into multiple words. Here our “str” string object contain to many spaces between words to remove that one we used “StringSplitOptions.RemoveEmptyEntries” property. In case if we use traditional coding we need to write lot of code to split string and remove spaces between words.
Following is the result of LINQ to Strings example.
welcome
to
tutlane.com
This is how we can write LINQ queries on strings to get required data from string. We will see another example to split string and get distinct words using LINQ query.
Following is the example to find distinct words from given string using LINQ queries in c#, vb.net
C# Code
using System;
using System.Linq;
namespace Linqtutorials
{
class Program
{
static void Main(string[] args)
{
string str = "welcome welcome to to tutlane.com";
var result = from s in str.ToLowerInvariant().Split().Distinct()
select s;
foreach (var item in result)
{
Console.WriteLine(item);
}
Console.ReadLine();
}
}
}
VB.NET Code
Module Module1
Sub Main()
Dim str As String = "welcome welcome to to tutlane.com"
Dim result = From s In str.ToLowerInvariant().Split().Distinct()
For Each item In result
Console.WriteLine(item)
Next
Console.ReadLine()
End Sub
End Module
If you observe above example, we splitted string and applied distinct property to get distinct words from the string.
Following is the result of LINQ to Strings example to split and get distinct words from string.
welcome
to
tutlane.com
This is how we can write LINQ queries to transform strings and collection of strings in c#, vb.net.