MethodImportAttributes Enum
Important
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Specifies flags for the unmanaged method import attributes.
This enumeration supports a bitwise combination of its member values.
public enum class MethodImportAttributes
[System.Flags]
public enum MethodImportAttributes
[<System.Flags>]
type MethodImportAttributes =
Public Enum MethodImportAttributes
- Inheritance
- Attributes
Name | Value | Description |
---|---|---|
None | 0 | Specifies default method import attributes. |
ExactSpelling | 1 | Specifies that the Common Language Runtime should not try an entry-point names with charset-specific suffixes when searching for the imported method. |
CharSetAnsi | 2 | Specifies that strings are marshalled as multiple-byte character strings: the system default Windows (ANSI) code page on Windows, and UTF-8 on Unix. |
CharSetUnicode | 4 | Specifies that strings are marshalled as Unicode 2-byte character strings. |
CharSetAuto | 6 | Specifies that the character set is chosen automatically. See Charsets and marshaling for details. |
CharSetMask | 6 | Specifies the character set used for string marshalling. |
BestFitMappingEnable | 16 | Specifies that the best-fit mapping behavior when converting Unicode characters to ANSI characters is enabled. |
BestFitMappingDisable | 32 | Specifies that the best-fit mapping behavior when converting Unicode characters to ANSI characters is disabled. |
BestFitMappingMask | 48 | Specifies whether the best-fit mapping behavior when converting Unicode characters to ANSI characters is enabled or disabled. |
SetLastError | 64 | Specifies that the imported method calls the SetLastError Windows API function before returning. |
CallingConventionWinApi | 256 | Specifies that the default platform calling convention is used. |
CallingConventionCDecl | 512 | Specifies that the calling convention is CDecl. |
CallingConventionStdCall | 768 | Specifies that the calling convention is StdCall. |
CallingConventionThisCall | 1024 | Specifies that the calling convention is ThisCall. |
CallingConventionFastCall | 1280 | Specifies that the calling convention is FastCall. |
CallingConventionMask | 1792 | Specifies the calling convention. |
ThrowOnUnmappableCharEnable | 4096 | Specifies that an exception should be thrown when an unmappable Unicode character is converted to an ANSI character. |
ThrowOnUnmappableCharDisable | 8192 | Specifies that an exception should not be thrown when an unmappable Unicode character is converted to an ANSI character. |
ThrowOnUnmappableCharMask | 12288 | Specifies whether an exception should be thrown when an unmappable Unicode character is converted to an ANSI character. |
Method import attributes are used with the MethodImport structure.
To check whether a value of this enumeration has the specific flag, combine that value with the corresponding mask constant using the bitwise AND operation (&
in C#) and compare its result with the constant of the flag you need to check. For example, to check for CDecl calling convention, use a code like this:
if((attributes & MethodImportAttributes.CallingConventionMask) == MethodImportAttributes.CallingConventionCDecl)
{
// The calling convention is CDecl
}
For more information about the unmanaged method import and the meaning of these attributes, see DllImportAttribute.
Προϊόν | Εκδόσεις |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8 (package-provided), 8, 9 (package-provided), 9 |
.NET Framework | 4.7 (package-provided), 4.7.1 (package-provided), 4.7.2 (package-provided), 4.8 (package-provided) |
.NET Standard | 2.0 (package-provided) |
UWP | 10.0 |
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