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OleDbType Enum

Definition

Specifies the data type of a field, a property, for use in an OleDbParameter.

public enum OleDbType
Inheritance
OleDbType

Fields

Name Value Description
Empty 0

No value (DBTYPE_EMPTY).

SmallInt 2

A 16-bit signed integer (DBTYPE_I2). This maps to Int16.

Integer 3

A 32-bit signed integer (DBTYPE_I4). This maps to Int32.

Single 4

A floating-point number within the range of -3.40E +38 through 3.40E +38 (DBTYPE_R4). This maps to Single.

Double 5

A floating-point number within the range of -1.79E +308 through 1.79E +308 (DBTYPE_R8). This maps to Double.

Currency 6

A currency value ranging from -2 63 (or -922,337,203,685,477.5808) to 2 63 -1 (or +922,337,203,685,477.5807) with an accuracy to a ten-thousandth of a currency unit (DBTYPE_CY). This maps to Decimal.

Date 7

Date data, stored as a double (DBTYPE_DATE). The whole portion is the number of days since December 30, 1899, and the fractional portion is a fraction of a day. This maps to DateTime.

BSTR 8

A null-terminated character string of Unicode characters (DBTYPE_BSTR). This maps to String.

IDispatch 9

A pointer to an IDispatch interface (DBTYPE_IDISPATCH). This maps to Object.

This data type is not currently supported by ADO.NET. Its usage may cause unpredictable results.

Error 10

A 32-bit error code (DBTYPE_ERROR). This maps to Exception.

Boolean 11

A Boolean value (DBTYPE_BOOL). This maps to Boolean.

Variant 12

A special data type that can contain numeric, string, binary, or date data, and also the special values Empty and Null (DBTYPE_VARIANT). This type is assumed if no other is specified. This maps to Object.

IUnknown 13

A pointer to an IUnknown interface (DBTYPE_UNKNOWN). This maps to Object.
This data type is not currently supported by ADO.NET. Its usage may cause unpredictable results.

Decimal 14

A fixed precision and scale numeric value between -10 38 -1 and 10 38 -1 (DBTYPE_DECIMAL). This maps to Decimal.

TinyInt 16

A 8-bit signed integer (DBTYPE_I1). This maps to SByte.

UnsignedTinyInt 17

A 8-bit unsigned integer (DBTYPE_UI1). This maps to Byte.

UnsignedSmallInt 18

A 16-bit unsigned integer (DBTYPE_UI2). This maps to UInt16.

UnsignedInt 19

A 32-bit unsigned integer (DBTYPE_UI4). This maps to UInt32.

BigInt 20

A 64-bit signed integer (DBTYPE_I8). This maps to Int64.

UnsignedBigInt 21

A 64-bit unsigned integer (DBTYPE_UI8). This maps to UInt64.

Filetime 64

A 64-bit unsigned integer representing the number of 100-nanosecond intervals since January 1, 1601 (DBTYPE_FILETIME). This maps to DateTime.

Guid 72

A globally unique identifier (or GUID) (DBTYPE_GUID). This maps to Guid.

Binary 128

A stream of binary data (DBTYPE_BYTES). This maps to an Array of type Byte.

Char 129

A character string (DBTYPE_STR). This maps to String.

WChar 130

A null-terminated stream of Unicode characters (DBTYPE_WSTR). This maps to String.

Numeric 131

An exact numeric value with a fixed precision and scale (DBTYPE_NUMERIC). This maps to Decimal.

DBDate 133

Date data in the format yyyymmdd (DBTYPE_DBDATE). This maps to DateTime.

DBTime 134

Time data in the format hhmmss (DBTYPE_DBTIME). This maps to TimeSpan.

DBTimeStamp 135

Data and time data in the format yyyymmddhhmmss (DBTYPE_DBTIMESTAMP). This maps to DateTime.

PropVariant 138

An automation PROPVARIANT (DBTYPE_PROP_VARIANT). This maps to Object.

VarNumeric 139

A variable-length numeric value (OleDbParameter only). This maps to Decimal.

VarChar 200

A variable-length stream of non-Unicode characters (OleDbParameter only). This maps to String.

LongVarChar 201

A long string value (OleDbParameter only). This maps to String.

VarWChar 202

A variable-length, null-terminated stream of Unicode characters (OleDbParameter only). This maps to String.

LongVarWChar 203

A long null-terminated Unicode string value (OleDbParameter only). This maps to String.

VarBinary 204

A variable-length stream of binary data (OleDbParameter only). This maps to an Array of type Byte.

LongVarBinary 205

A long binary value (OleDbParameter only). This maps to an Array of type Byte.

Remarks

The preceding table shows mappings between OleDbType data types, OLE DB data types (shown in parentheses), and the .NET Framework types. The OleDbType data types accept System.Char[] as Parameter.Value in parameterized queries.

Applies to

מוצר גירסאות
.NET 8 (package-provided), 9 (package-provided)
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7 (package-provided), 4.7, 4.7.1 (package-provided), 4.7.1, 4.7.2 (package-provided), 4.7.2, 4.8 (package-provided), 4.8, 4.8.1
.NET Standard 2.0 (package-provided)