Статья
04/01/2012

Метод VarTypeFromTypeCode

Converts a system TypeCode to an Integration Services Variant data type.

Пространство имен: Microsoft.SqlServer.Dts.Runtime
Сборка: Microsoft.SqlServer.ManagedDTS (в Microsoft.SqlServer.ManagedDTS.dll)

Синтаксис

'Декларация
Public Shared Function VarTypeFromTypeCode ( _
    typeCode As TypeCode _
) As UShort
'Применение
Dim typeCode As TypeCode
Dim returnValue As UShort

returnValue = DtsConvert.VarTypeFromTypeCode(typeCode)

public static ushort VarTypeFromTypeCode(
    TypeCode typeCode
)

public:
static unsigned short VarTypeFromTypeCode(
    TypeCode typeCode
)

static member VarTypeFromTypeCode : 
        typeCode:TypeCode -> uint16

public static function VarTypeFromTypeCode(
    typeCode : TypeCode
) : ushort

Параметры

typeCode
Тип: System. . :: . .TypeCode
The system https://go.microsoft.com/fwlink/?LinkId=25731 TypeCode to convert to the SSIS type.

Возвращаемое значение

Тип: System. . :: . .UInt16
The SSIS type for the system TypeCode.

Замечания

For a list of the SSIS types, see Типы данных служб Integration Services.

The following table shows the TypeCode and what SSIS Variant data type they are converted to.

System TypeCode	Variant Data Type
System.TypeCode.Empty	VT_EMPTY
System.TypeCode.DBNull	VT_NULL
System.TypeCode.Int16	VT_I2
System.TypeCode.Int32	VT_I4
System.TypeCode.Single	VT_R4
System.TypeCode.Double	VT_R8
System.TypeCode.Decimal	VT_CY
System.TypeCode.DateTime	VT_DATE
System.TypeCode.String	VT_BSTR
System.TypeCode.Object	VT_DISPATCH
System.TypeCode.Object	VT_ERROR
System.TypeCode.Boolean	VT_BOOL
System.TypeCode.Object	VT_VARIANT
System.TypeCode.Object	VT_UNKNOWN
System.TypeCode.Decimal	VT_DECIMAL
System.TypeCode.SByte	VT_I1
System.TypeCode.Byte	VT_UI1
System.TypeCode.UInt16	VT_UI2
System.TypeCode.UInt32	VT_UI4
System.TypeCode.Int64	VT_I8
System.TypeCode.UInt64	VT_UI8
System.TypeCode.Int16	VT_INT
System.TypeCode.UInt16	VT_UINT
System.TypeCode.Empty	VT_VOID

Примеры

The following example shows a pipeline component that overrides the RegisterEvents method and creates a custom event using the EventInfos collection, using the VarTypeFromTypeCode to create a reference type.

Public override void RegisterEvents()
{
string []parameters = new string[1]{"Parameter1"};
ushort []types = new ushort[1]{DtsConvert.VarTypeFromTypeCode(TypeCode.String)};
string []descriptions = new string [1]{"The first parameter."};

EventInfos.Add("OnPreExecute", "Fires when the PreExecute method runs.", false, ref parameters, ref types, ref descriptions);
}

Public Overrides  Sub RegisterEvents()
String ()parameters = New String(1)
{
    "Parameter1"
}

System.UInt16 ()types = New System.UInt16(1)
{
    DtsConvert.VarTypeFromTypeCode(TypeCode.String)
}

String ()descriptions = New String (1)
{
    "The first parameter."
}

 
EventInfos.Add("OnPreExecute", "Fires when the PreExecute method runs.", False,  parameters,  types,  descriptions)
End Sub

См. также

Справочник

DtsConvert Класс

Пространство имен Microsoft.SqlServer.Dts.Runtime

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