Count the occurrences of a character in a string in VB.NET
In this post, here is the VB.Net code to count the occurrences of a particular character in a given string.
Suppose there is a case where we may want to check whether the string contains particular character or not. And we may want to count the occurrences of the character, in that case you can use this method and if count =0, then it means the character is not found.
Below are the 2 codes for the same method, you can use whatever you want.
Method 1 :
”’ <summary>
”’ Method to count the occurrences of a charcter in a string
”’ </summary>
”’ <param name=”inputString”>InputString</param>
”’ <param name=”SearchChar”>character to count</param>
”’ <param name=”matchCase”>True-MatchCase, False-IgnoreCase</param>
”’ <returns>count of given character</returns>
”’ <remarks></remarks>
Public FunctionCharCountInString(inputString As String, SearchChar AsChar, matchCase AsBoolean) As Integer
Dim count As Integer = 0
Dim chrArr As Char()
If matchCase Then
chrArr = inputString.ToCharArray()
Else
SearchChar = Char.ToLower(SearchChar)
chrArr = inputString.ToLower().ToCharArray()
End If
For Each ch As Char In chrArr
If ch = SearchChar Then
count += 1
End If
Next
Return count
End Function
Method 2 :
”’ <summary>
”’ Method to count the occurrences of a charcter in a string using LINQ
”’ </summary>
”’ <param name=”inputString”>InputString</param>
”’ <param name=”SearchChar”>character to count</param>
”’ <param name=”matchCase”>True-MatchCase, False-IgnoreCase</param>
”’ <returns>count of given character</returns>
”’ <remarks>.Net > 3.5 Version </remarks>
Public FunctionCharCountInStringUsingLinq(inputString As String, SearchChar AsChar, matchCase AsBoolean) As Integer
Dim count As Integer = 0
If Not matchCase Then
SearchChar = Char.ToLower(SearchChar)
inputString = inputString.ToLower()
End If
count = inputString.Count(Function(x) x = SearchChar)
‘ count = inputString.Count(x => x == SearchChar) in c#
Return count
End Function
