IdnMapping.GetAscii Method (String, Int32)

Encodes a substring of one or more domain name labels that consist of Unicode characters to a string of Unicode characters in the US-ASCII character range.

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

public string GetAscii(
	string unicode,
	int index
)

Parameters

unicode
Type: System.String
An input string to convert, which consists of one or more domain name labels delimited with label separators.
index
Type: System.Int32
A zero-based offset into unicode that specifies the start of the substring. The conversion operation continues to the end of unicode.

Return Value

Type: System.String
The equivalent of the substring specified by the unicode and index parameters, consisting of displayable Unicode characters in the US-ASCII character range (U+0020 to U+007E) and formatted according to the Internationalizing Domain Names in Applications (IDNA) standard.

ExceptionCondition
ArgumentNullException

unicode is null.

ArgumentOutOfRangeException

index or count is less than zero.

-or-

index is greater than the length of unicode.

ArgumentException

unicode is invalid based on the AllowUnassigned and UseStd3AsciiRules properties, and the IDNA standard.

-or-

A label contains one or more of the Unicode control characters from U+0001 through U+001F, or U+007F.

For more information about domain names, labels, and label separators, see the remarks for the IdnMapping.GetAscii(String, Int32, Int32) method.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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.
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