Base64.IsValid Method

Definition

Namespace:

System.Buffers.Text

Assembly:

System.Runtime.dll

Overloads

IsValid(ReadOnlySpan<Byte>)	Validates that the specified span of UTF-8 text is comprised of valid base-64 encoded data.
IsValid(ReadOnlySpan<Char>)	Validates that the specified span of text is comprised of valid base-64 encoded data.
IsValid(ReadOnlySpan<Byte>, Int32)	Validates that the specified span of UTF-8 text is comprised of valid base-64 encoded data.
IsValid(ReadOnlySpan<Char>, Int32)	Validates that the specified span of text is comprised of valid base-64 encoded data.

IsValid(ReadOnlySpan<Byte>)

Source:

Base64Validator.cs

Validates that the specified span of UTF-8 text is comprised of valid base-64 encoded data.

public:
 static bool IsValid(ReadOnlySpan<System::Byte> base64TextUtf8);

public static bool IsValid (ReadOnlySpan<byte> base64TextUtf8);

static member IsValid : ReadOnlySpan<byte> -> bool

Public Shared Function IsValid (base64TextUtf8 As ReadOnlySpan(Of Byte)) As Boolean

Parameters

base64TextUtf8

ReadOnlySpan<Byte>

A span of UTF-8 text to validate.

Returns

Boolean

true if base64TextUtf8 contains a valid, decodable sequence of base-64 encoded data; otherwise, false.

Remarks

If the method returns true, the same text passed to DecodeFromUtf8(ReadOnlySpan<Byte>, Span<Byte>, Int32, Int32, Boolean) and DecodeFromUtf8InPlace(Span<Byte>, Int32) would successfully decode. Any amount of whitespace is allowed anywhere in the input, where whitespace is defined as the characters ' ', '\t', '\r', or '\n' (as bytes).

IsValid(ReadOnlySpan<Char>)

Source:

Base64Validator.cs

Validates that the specified span of text is comprised of valid base-64 encoded data.

public:
 static bool IsValid(ReadOnlySpan<char> base64Text);

public static bool IsValid (ReadOnlySpan<char> base64Text);

static member IsValid : ReadOnlySpan<char> -> bool

Public Shared Function IsValid (base64Text As ReadOnlySpan(Of Char)) As Boolean

Parameters

base64Text

ReadOnlySpan<Char>

A span of text to validate.

Returns

Boolean

true if base64Text contains a valid, decodable sequence of base-64 encoded data; otherwise, false.

Remarks

If the method returns true, the same text passed to FromBase64String(String) and TryFromBase64Chars(ReadOnlySpan<Char>, Span<Byte>, Int32) would successfully decode (in the case of TryFromBase64Chars(ReadOnlySpan<Char>, Span<Byte>, Int32) assuming sufficient output space). Any amount of whitespace is allowed anywhere in the input, where whitespace is defined as the characters ' ', '\t', '\r', or '\n'.

IsValid(ReadOnlySpan<Byte>, Int32)

Source:

Base64Validator.cs

Validates that the specified span of UTF-8 text is comprised of valid base-64 encoded data.

public:
 static bool IsValid(ReadOnlySpan<System::Byte> base64TextUtf8, [Runtime::InteropServices::Out] int % decodedLength);

public static bool IsValid (ReadOnlySpan<byte> base64TextUtf8, out int decodedLength);

static member IsValid : ReadOnlySpan<byte> * int -> bool

Public Shared Function IsValid (base64TextUtf8 As ReadOnlySpan(Of Byte), ByRef decodedLength As Integer) As Boolean

Parameters

base64TextUtf8

ReadOnlySpan<Byte>

A span of UTF-8 text to validate.

decodedLength

Int32

If the method returns true, the number of decoded bytes that will result from decoding the input UTF-8 text.

Returns

Boolean

true if base64TextUtf8 contains a valid, decodable sequence of base-64 encoded data; otherwise, false.

Remarks

If the method returns true, the same text passed to DecodeFromUtf8(ReadOnlySpan<Byte>, Span<Byte>, Int32, Int32, Boolean) and DecodeFromUtf8InPlace(Span<Byte>, Int32) would successfully decode. Any amount of whitespace is allowed anywhere in the input, where whitespace is defined as the characters ' ', '\t', '\r', or '\n' (as bytes).

IsValid(ReadOnlySpan<Char>, Int32)

Source:

Base64Validator.cs

Validates that the specified span of text is comprised of valid base-64 encoded data.

public:
 static bool IsValid(ReadOnlySpan<char> base64Text, [Runtime::InteropServices::Out] int % decodedLength);

public static bool IsValid (ReadOnlySpan<char> base64Text, out int decodedLength);

static member IsValid : ReadOnlySpan<char> * int -> bool

Public Shared Function IsValid (base64Text As ReadOnlySpan(Of Char), ByRef decodedLength As Integer) As Boolean

Parameters

base64Text

ReadOnlySpan<Char>

A span of text to validate.

decodedLength

Int32

If the method returns true, the number of decoded bytes that will result from decoding the input text.

Returns

Boolean

true if base64Text contains a valid, decodable sequence of base-64 encoded data; otherwise, false.

Remarks

If the method returns true, the same text passed to FromBase64String(String) and TryFromBase64Chars(ReadOnlySpan<Char>, Span<Byte>, Int32) would successfully decode (in the case of TryFromBase64Chars(ReadOnlySpan<Char>, Span<Byte>, Int32) assuming sufficient output space). Any amount of whitespace is allowed anywhere in the input, where whitespace is defined as the characters ' ', '\t', '\r', or '\n'.