Sdílet prostřednictvím

  • Článek

DataType Element (ASSL)

Defines the data type of the associated element.

Syntax

<DataItem> <!-- or Measure -->
   ...
   <DataType>...</DataType>
   ...
</DataItem>

Element Characteristics

Characteristic

Description

Data type and length

String (enumeration)

Default value

None

Cardinality

0-1: Optional element that can occur once and only once.

Element Relationships

Relationship

Element

Parent element

DataItem, Measure

Child elements

None

Remarks

The values for DataType are defined in the System.Data.OleDb.OleDbType enumeration. However, only the enumeration values in the following table are valid in the DataType element.

Value

Description

BigInt

A 64-bit signed integer. This data type maps to the Int64 data type in Microsoft .NET Framework and the DBTYPE_I8 data type in OLE DB.

Bool

A Boolean value. This data type maps to the Boolean data type in the .NET Framework and the DBTYPE_BOOL data type in OLE DB.

Currency

A currency value ranging from -263 (or -922,337,203,685,477.5808) to 263-1 (or +922,337,203,685,477.5807) with an accuracy to a ten-thousandth of a currency unit. This data type maps to the Decimal data type in the .NET Framework and the DBTYPE_CY data type in OLE DB.

Date

Date data, stored as a double-precision floating point number. The whole portion is the number of days since December 30, 1899, while the fractional portion is a fraction of a day. This data type maps to the DateTime data type in the .NET Framework and the DBTYPE_DATE data type in OLE DB.

Double

A double-precision floating point number within the range of -1.79E +308 through 1.79E +308. This data type maps to the Double data type in the .NET Framework and the DBTYPE_R8 data type in OLE DB.

Integer

A 32-bit signed integer. This data type maps to the Int32 data type in the .NET Framework and the DBTYPE_I4 data type in OLE DB.

Single

A single-precision floating point number within the range of -3.40E +38 through 3.40E +38. This data type maps to the Single data type in .NET Framework and the DBTYPE_R4 data type in OLE DB.

SmallInt

A 16-bit signed integer. This data type maps to the Int16 data type in the .NET Framework and the DBTYPE_I2 data type in OLE DB.

TinyInt

An 8-bit signed integer. This data type maps to the SByte data type in the .NET Framework and the DBTYPE_I1 data type in OLE DB.

UnsignedBigInt

A 64-bit unsigned integer. This data type maps to the UInt64 data type in .NET Framework and the DBTYPE_UI8 data type in OLE DB.

UnsignedInt

A 32-bit unsigned integer. This data type maps to the UInt32 data type in the .NET Framework and the DBTYPE_UI4 data type in OLE DB.

UnsignedSmallInt

A 16-bit unsigned integer. This data type maps to the UInt16 data type in the .NET Framework and the DBTYPE_UI2 data type in OLE DB.

WChar

A null-terminated stream of Unicode characters. This data type maps to the String data type in the .NET Framework and the DBTYPE_WSTR data type in OLE DB.

Inherited

The data type of the DataItem contained in the Source element of the Measure element.

NoteNote
Applicable only to Measure elements.

See Also

Reference

Properties (ASSL)