This topic has not yet been rated - Rate this topic

UTF32Encoding.GetCharCount Method (Byte*, Int32)

.NET Framework 4

Other Versions

Calculates the number of characters produced by decoding a sequence of bytes starting at the specified byte pointer.

This API is not CLS-compliant.

Namespace: System.Text
Assembly: mscorlib (in mscorlib.dll)

Syntax

C++

[CLSCompliantAttribute(false)]
public override int GetCharCount(
	byte* bytes,
	int count
)

Parameters

bytes: Type: System.Byte*
A pointer to the first byte to decode.

count: Type: System.Int32
The number of bytes to decode.

Return Value

Type: System.Int32
The number of characters produced by decoding the specified sequence of bytes.

Exceptions

Exception	Condition
ArgumentNullException	bytes is null.
ArgumentOutOfRangeException	count is less than zero. -or- The resulting number of bytes is greater than the maximum number that can be returned as an integer.
ArgumentException	Error detection is enabled, and bytes contains an invalid sequence of bytes.
DecoderFallbackException	A fallback occurred (see Character Encoding in the .NET Framework for complete explanation) -and- DecoderFallback is set to DecoderExceptionFallback.

Remarks

To calculate the exact array size required by GetChars to store the resulting characters, use GetCharCount. To calculate the maximum array size, the application should use GetMaxCharCount. The GetCharCount method generally allows allocation of less memory, while the GetMaxCharCount method generally executes faster.

With error detection, an invalid sequence causes this method to throw a ArgumentException. Without error detection, invalid sequences are ignored, and no exception is thrown.

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET Framework Security

SecurityCriticalAttribute
Requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

UTF32Encoding Class

GetCharCount Overload

System.Text Namespace

GetChars

GetMaxCharCount

GetDecoder

Did you find this helpful? Yes No

Not accurate

Not enough depth

Need more code examples

(1500 characters remaining)

Community Additions

ADD