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Regex.Count Method
Definition
- Namespace:
- System.Text.RegularExpressions
- Assemblies:
- netstandard.dll, System.Text.RegularExpressions.dll
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Overloads
| Name | Description |
|---|---|
| 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. |
Count(ReadOnlySpan<Char>)
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- 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
Count(String)
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- 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
Count(ReadOnlySpan<Char>, Int32)
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- 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
Count(ReadOnlySpan<Char>, String)
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- 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
Count(String, String)
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- 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
Count(ReadOnlySpan<Char>, String, RegexOptions)
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- 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
Count(String, String, RegexOptions)
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- 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
Count(ReadOnlySpan<Char>, String, RegexOptions, TimeSpan)
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- 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
Count(String, String, RegexOptions, TimeSpan)
- Source:
- Regex.Count.cs
- Source:
- Regex.Count.cs
- 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
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