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VarEnum Enum

Definisi

Perhatian

Marshalling VARIANTs may be unavailable in future releases.

Menunjukkan cara marsekal elemen array ketika array di-marshalasikan dari berhasil ke kode yang tidak dikelola sebagai SafeArray.

public enum class VarEnum
[System.Obsolete("Marshalling VARIANTs may be unavailable in future releases.")]
public enum VarEnum
public enum VarEnum
[System.Serializable]
public enum VarEnum
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public enum VarEnum
[<System.Obsolete("Marshalling VARIANTs may be unavailable in future releases.")>]
type VarEnum = 
type VarEnum = 
[<System.Serializable>]
type VarEnum = 
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type VarEnum = 
Public Enum VarEnum
Warisan
Atribut

Bidang

VT_ARRAY 8192

SAFEARRAY Menunjukkan penunjuk.

VT_BLOB 65

Menunjukkan panjang byte yang diawali.

VT_BLOB_OBJECT 70

Menunjukkan bahwa blob berisi objek .

VT_BOOL 11

Menunjukkan nilai Boolean.

VT_BSTR 8

Menunjukkan string BSTR.

VT_BYREF 16384

Menunjukkan bahwa nilai adalah referensi.

VT_CARRAY 28

Menunjukkan array gaya C.

VT_CF 71

Menunjukkan format clipboard.

VT_CLSID 72

Menunjukkan ID kelas.

VT_CY 6

Menunjukkan nilai mata uang.

VT_DATE 7

Menunjukkan nilai DATE.

VT_DECIMAL 14

decimal Menunjukkan nilai.

VT_DISPATCH 9

IDispatch Menunjukkan penunjuk.

VT_EMPTY 0

Menunjukkan bahwa nilai tidak ditentukan.

VT_ERROR 10

Menunjukkan SCODE.

VT_FILETIME 64

Menunjukkan nilai FILETIME.

VT_HRESULT 25

Menunjukkan HRESULT.

VT_I1 16

char Menunjukkan nilai.

VT_I2 2

Menunjukkan bilangan short bulat.

VT_I4 3

Menunjukkan bilangan long bulat.

VT_I8 20

Menunjukkan bilangan bulat 64-bit.

VT_INT 22

Menunjukkan nilai bilangan bulat.

VT_LPSTR 30

Menunjukkan string yang dihentikan null.

VT_LPWSTR 31

Menunjukkan string lebar yang dihentikan oleh null.

VT_NULL 1

Menunjukkan nilai null, mirip dengan nilai null di SQL.

VT_PTR 26

Menunjukkan jenis penunjuk.

VT_R4 4

float Menunjukkan nilai.

VT_R8 5

double Menunjukkan nilai.

VT_RECORD 36

Menunjukkan jenis yang ditentukan pengguna.

VT_SAFEARRAY 27

Menunjukkan SAFEARRAY. Tidak valid dalam VARIAN.

VT_STORAGE 67

Menunjukkan bahwa nama penyimpanan mengikuti.

VT_STORED_OBJECT 69

Menunjukkan bahwa penyimpanan berisi objek.

VT_STREAM 66

Menunjukkan bahwa nama aliran mengikuti.

VT_STREAMED_OBJECT 68

Menunjukkan bahwa aliran berisi objek.

VT_UI1 17

byteMenunjukkan .

VT_UI2 18

unsigned shortMenunjukkan .

VT_UI4 19

unsigned longMenunjukkan .

VT_UI8 21

Menunjukkan bilangan bulat yang tidak ditandatangani 64-bit.

VT_UINT 23

Menunjukkan nilai bilangan unsigned bulat.

VT_UNKNOWN 13

IUnknown Menunjukkan penunjuk.

VT_USERDEFINED 29

Menunjukkan jenis yang ditentukan pengguna.

VT_VARIANT 12

Menunjukkan penunjuk VARIAN far .

VT_VECTOR 4096

Menunjukkan array sederhana yang dihitung.

VT_VOID 24

Menunjukkan gaya voidC .

Contoh

using namespace System;
using namespace System::Runtime::InteropServices;

// If you do not have a type library for an interface
// you can redeclare it using ComImportAttribute.
// This is how the interface would look in an idl file.
//[
//object,
//uuid("73EB4AF8-BE9C-4b49-B3A4-24F4FF657B26"),
//dual, helpstring("IMyStorage Interface"),
//pointer_default(unique)
//]
//interface IMyStorage : IDispatch
//{
// [id(1)]
// HRESULT GetItem([in] BSTR bstrName, [out, retval] IDispatch ** ppItem);
// [id(2)]
// HRESULT GetItems([in] BSTR bstrLocation, [out] SAFEARRAY(VARIANT)* pItems);
// [id(3)]
// HRESULT GetItemDescriptions([in] BSTR bstrLocation, [out] SAFEARRAY(VARIANT) ** ppItems);
// [id(4), propget]
// HRESULT get_IsEmpty([out, retval] BOOL * pfEmpty);
//};
// This is the managed declaration.

[ComImport]
[Guid("73EB4AF8-BE9C-4b49-B3A4-24F4FF657B26")]
interface class IMyStorage
{
   [DispId(1)]
   Object^ GetItem( [In,MarshalAs(UnmanagedType::BStr)]String^ bstrName );

   //[return : MarshalAs(UnmanagedType::Interface)]

   [DispId(2)]
   void GetItems( [In,MarshalAs(UnmanagedType::BStr)]String^ bstrLocation, [Out,MarshalAs(UnmanagedType::SafeArray,
   SafeArraySubType=VarEnum::VT_VARIANT)]array<Object^>^Items );

   [DispId(3)]
   void GetItemDescriptions( [In]String^ bstrLocation, [In,Out,MarshalAs(UnmanagedType::SafeArray)]array<Object^>^varDescriptions );

   property bool IsEmpty 
   {
      [DispId(4)]
      [returnvalue:MarshalAs(UnmanagedType::VariantBool)]
      bool get();
   }
};
using System;
using System.Runtime.InteropServices;

namespace MyModule
{
    // If you do not have a type library for an interface
    // you can redeclare it using ComImportAttribute.

    // This is how the interface would look in an idl file.

    //[
    //object,
    //uuid("73EB4AF8-BE9C-4b49-B3A4-24F4FF657B26"),
    //dual,	helpstring("IMyStorage Interface"),
    //pointer_default(unique)
    //]
    //interface IMyStorage : IDispatch
    //{
    //	[id(1)]
    //	HRESULT GetItem([in] BSTR bstrName, [out, retval] IDispatch ** ppItem);
    //	[id(2)]
    //	HRESULT GetItems([in] BSTR bstrLocation, [out] SAFEARRAY(VARIANT)* pItems);
    //	[id(3)]
    //	HRESULT GetItemDescriptions([in] BSTR bstrLocation, [out] SAFEARRAY(VARIANT) ** ppItems);
    //	[id(4), propget]
    //	HRESULT get_IsEmpty([out, retval] BOOL * pfEmpty);
    //};

    // This is the managed declaration.

    [ComImport]
    [Guid("73EB4AF8-BE9C-4b49-B3A4-24F4FF657B26")]
    public interface IMyStorage
    {
        [DispId(1)]
        [return: MarshalAs(UnmanagedType.Interface)]
        object GetItem([In, MarshalAs(UnmanagedType.BStr)] String bstrName);

        [DispId(2)]
        void GetItems([In, MarshalAs(UnmanagedType.BStr)] String bstrLocation,
            [Out, MarshalAs( UnmanagedType.SafeArray,
                      SafeArraySubType = VarEnum.VT_VARIANT )] out Object[] Items);

        [DispId(3)]
        void GetItemDescriptions([In] String bstrLocation,
            [In, Out, MarshalAs(UnmanagedType.SafeArray)] ref Object[] varDescriptions);

        bool IsEmpty
        {
            [DispId(4)]
            [return: MarshalAs(UnmanagedType.VariantBool)]
            get;
        }
    }
}
Imports System.Runtime.InteropServices

Module MyModule
    ' If you do not have a type library for an interface
    ' you can redeclare it using ComImportAttribute.

    ' This is how the interface would look in an idl file.

    '[
    'object,
    'uuid("73EB4AF8-BE9C-4b49-B3A4-24F4FF657B26"),
    'dual,	helpstring("IMyStorage Interface"),
    'pointer_default(unique)
    ']
    'interface IMyStorage : IDispatch
    '{
    '	[id(1)]
    '	HRESULT GetItem([in] BSTR bstrName, [out, retval] IDispatch ** ppItem);
    '	[id(2)]
    '	HRESULT GetItems([in] BSTR bstrLocation, [out] SAFEARRAY(VARIANT)* pItems);
    '	[id(3)]
    '	HRESULT GetItemDescriptions([in] BSTR bstrLocation, [out] SAFEARRAY(VARIANT) ** ppItems);
    '	[id(4), propget]
    '	HRESULT get_IsEmpty([out, retval] BOOL * pfEmpty);
    '};

    ' This is the managed declaration.

    <ComImport(), Guid("73EB4AF8-BE9C-4b49-B3A4-24F4FF657B26")> _
    Public Interface IMyStorage
        <DispId(1)> _
        Function GetItem(<InAttribute(), MarshalAs(UnmanagedType.BStr)> ByVal bstrName As String) _
           As <MarshalAs(UnmanagedType.Interface)> Object

        <DispId(2)> _
        Function GetItems(<InAttribute(), MarshalAs(UnmanagedType.BStr)> ByVal bstrLocation As String, _
           <OutAttribute(), MarshalAs(UnmanagedType.SafeArray, SafeArraySubType := VarEnum.VT_VARIANT)> _
                                      ByVal Items() As Object)

        <DispId(3)> _
        Function GetItemDescriptions(<InAttribute()> ByVal bstrLocation As String, _
           <InAttribute(), OutAttribute(), _
                      MarshalAs(UnmanagedType.SafeArray)> ByRef varDescriptions() As Object)

        <DispId(4)> _
        ReadOnly Property IsEmpty(<MarshalAs(UnmanagedType.VariantBool)> ByVal bEmpty As Boolean)

    End Interface
End Module

Keterangan

Digunakan dengan System.Runtime.InteropServices.MarshalAsAttribute untuk secara eksplisit mengontrol jenis elemen .SafeArray

Berlaku untuk

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