Regex.Count Method
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| Count(ReadOnlySpan<Char>) |
Searches an input span for all occurrences of a regular expression and returns the number of matches. |
| Count(String) |
Searches an input string for all occurrences of a regular expression and returns the number of matches. |
| Count(ReadOnlySpan<Char>, Int32) |
Searches an input span for all occurrences of a regular expression and returns the number of matches. |
| Count(ReadOnlySpan<Char>, String) |
Searches an input span for all occurrences of a regular expression and returns the number of matches. |
| Count(String, String) |
Searches an input string for all occurrences of a regular expression and returns the number of matches. |
| Count(ReadOnlySpan<Char>, String, RegexOptions) |
Searches an input span for all occurrences of a regular expression and returns the number of matches. |
| Count(String, String, RegexOptions) |
Searches an input string for all occurrences of a regular expression and returns the number of matches. |
| Count(ReadOnlySpan<Char>, String, RegexOptions, TimeSpan) |
Searches an input span for all occurrences of a regular expression and returns the number of matches. |
| Count(String, String, RegexOptions, TimeSpan) |
Searches an input string for all occurrences of a regular expression and returns the number of matches. |
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
Searches an input span for all occurrences of a regular expression and returns the number of matches.
public:
int Count(ReadOnlySpan<char> input);public int Count(ReadOnlySpan<char> input);member this.Count : ReadOnlySpan<char> -> intPublic Function Count (input As ReadOnlySpan(Of Char)) As IntegerParameters
- input
- ReadOnlySpan<Char>
The span to search for a match.
Returns
The number of matches.
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | 7, 8, 9, 10 |
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
Searches an input string for all occurrences of a regular expression and returns the number of matches.
public:
int Count(System::String ^ input);public int Count(string input);member this.Count : string -> intPublic Function Count (input As String) As IntegerParameters
- input
- String
The string to search for a match.
Returns
The number of matches.
Exceptions
input is null.
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | 7, 8, 9, 10 |
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
Searches an input span for all occurrences of a regular expression and returns the number of matches.
public:
int Count(ReadOnlySpan<char> input, int startat);public int Count(ReadOnlySpan<char> input, int startat);member this.Count : ReadOnlySpan<char> * int -> intPublic Function Count (input As ReadOnlySpan(Of Char), startat As Integer) As IntegerParameters
- input
- ReadOnlySpan<Char>
The span to search for a match.
- startat
- Int32
The zero-based character position at which to start the search.
Returns
The number of matches.
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | 7, 8, 9, 10 |
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
Searches an input span for all occurrences of a regular expression and returns the number of matches.
public:
static int Count(ReadOnlySpan<char> input, System::String ^ pattern);public static int Count(ReadOnlySpan<char> input, string pattern);static member Count : ReadOnlySpan<char> * string -> intPublic Shared Function Count (input As ReadOnlySpan(Of Char), pattern As String) As IntegerParameters
- input
- ReadOnlySpan<Char>
The span to search for a match.
- pattern
- String
The regular expression pattern to match.
Returns
The number of matches.
Exceptions
A regular expression parsing error occurred.
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | 7, 8, 9, 10 |
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
Searches an input string for all occurrences of a regular expression and returns the number of matches.
public:
static int Count(System::String ^ input, System::String ^ pattern);public static int Count(string input, string pattern);static member Count : string * string -> intPublic Shared Function Count (input As String, pattern As String) As IntegerParameters
- input
- String
The string to search for a match.
- pattern
- String
The regular expression pattern to match.
Returns
The number of matches.
Exceptions
input or pattern is null.
A regular expression parsing error occurred.
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | 7, 8, 9, 10 |
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
Searches an input span for all occurrences of a regular expression and returns the number of matches.
public:
static int Count(ReadOnlySpan<char> input, System::String ^ pattern, System::Text::RegularExpressions::RegexOptions options);public static int Count(ReadOnlySpan<char> input, string pattern, System.Text.RegularExpressions.RegexOptions options);static member Count : ReadOnlySpan<char> * string * System.Text.RegularExpressions.RegexOptions -> intPublic Shared Function Count (input As ReadOnlySpan(Of Char), pattern As String, options As RegexOptions) As IntegerParameters
- input
- ReadOnlySpan<Char>
The span to search for a match.
- pattern
- String
The regular expression pattern to match.
- options
- RegexOptions
A bitwise combination of the enumeration values that specify options for matching.
Returns
The number of matches.
Exceptions
options is not a valid bitwise combination of RegexOptions values.
A regular expression parsing error occurred.
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | 7, 8, 9, 10 |
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
Searches an input string for all occurrences of a regular expression and returns the number of matches.
public:
static int Count(System::String ^ input, System::String ^ pattern, System::Text::RegularExpressions::RegexOptions options);public static int Count(string input, string pattern, System.Text.RegularExpressions.RegexOptions options);static member Count : string * string * System.Text.RegularExpressions.RegexOptions -> intPublic Shared Function Count (input As String, pattern As String, options As RegexOptions) As IntegerParameters
- input
- String
The string to search for a match.
- pattern
- String
The regular expression pattern to match.
- options
- RegexOptions
A bitwise combination of the enumeration values that specify options for matching.
Returns
The number of matches.
Exceptions
input or pattern is null.
options is not a valid bitwise combination of RegexOptions values.
A regular expression parsing error occurred.
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | 7, 8, 9, 10 |
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
Searches an input span for all occurrences of a regular expression and returns the number of matches.
public:
static int Count(ReadOnlySpan<char> input, System::String ^ pattern, System::Text::RegularExpressions::RegexOptions options, TimeSpan matchTimeout);public static int Count(ReadOnlySpan<char> input, string pattern, System.Text.RegularExpressions.RegexOptions options, TimeSpan matchTimeout);static member Count : ReadOnlySpan<char> * string * System.Text.RegularExpressions.RegexOptions * TimeSpan -> intPublic Shared Function Count (input As ReadOnlySpan(Of Char), pattern As String, options As RegexOptions, matchTimeout As TimeSpan) As IntegerParameters
- input
- ReadOnlySpan<Char>
The span to search for a match.
- pattern
- String
The regular expression pattern to match.
- options
- RegexOptions
A bitwise combination of the enumeration values that specify options for matching.
- matchTimeout
- TimeSpan
A time-out interval, or InfiniteMatchTimeout to indicate that the method should not time out.
Returns
The number of matches.
Exceptions
options is not a valid bitwise combination of RegexOptions values, or matchTimeout is negative, zero, or greater than approximately 24 days.
A regular expression parsing error occurred.
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | 7, 8, 9, 10 |
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
Searches an input string for all occurrences of a regular expression and returns the number of matches.
public:
static int Count(System::String ^ input, System::String ^ pattern, System::Text::RegularExpressions::RegexOptions options, TimeSpan matchTimeout);public static int Count(string input, string pattern, System.Text.RegularExpressions.RegexOptions options, TimeSpan matchTimeout);static member Count : string * string * System.Text.RegularExpressions.RegexOptions * TimeSpan -> intPublic Shared Function Count (input As String, pattern As String, options As RegexOptions, matchTimeout As TimeSpan) As IntegerParameters
- input
- String
The string to search for a match.
- pattern
- String
The regular expression pattern to match.
- options
- RegexOptions
A bitwise combination of the enumeration values that specify options for matching.
- matchTimeout
- TimeSpan
A time-out interval, or InfiniteMatchTimeout to indicate that the method should not time out.
Returns
The number of matches.
Exceptions
input or pattern is null.
options is not a valid bitwise combination of RegexOptions values, or matchTimeout is negative, zero, or greater than approximately 24 days.
A regular expression parsing error occurred.
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | 7, 8, 9, 10 |
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