System.Data.DbType Enumeration

Specifies the data type of a field, a property, or a Parameter object of a .NET Framework data provider.

Syntax

public enum DbType

Remarks

The type of a parameter is specific to the .NET Framework data provider. Specifying the type converts the value of the Parameter to the data provider Type before passing the value to the data source. If the type is not specified, ADO.NET infers the data provider Type of the Parameter from the Value property of the Parameter object.

You can also generically specify the type of a Parameter by setting DbType property of a Parameter object.

ADO.NET cannot correctly infer the type if a byte array is larger than 8,000 bytes. Explicitly specify the System.Data.DbType when working with byte arrays larger than 8,000 bytes.

Members

Member NameDescription
AnsiString

A variable-length stream of non-Unicode characters ranging between 1 and 8,000 characters.

AnsiStringFixedLength

A fixed-length stream of non-Unicode characters.

Binary

A variable-length stream of binary data ranging between 1 and 8,000 bytes.

Boolean

A simple type representing Boolean values of true or false.

Byte

An 8-bit unsigned integer ranging in value from 0 to 255.

Currency

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

Date

A type representing a date value.

DateTime

A type representing a date and time value.

Decimal

A simple type representing values ranging from 1.0 x 10 to approximately 7.9 x 10 with 28-29 significant digits.

Double

A floating point type representing values ranging from approximately 5.0 x 10 to 1.7 x 10 with a precision of 15-16 digits.

Guid

A globally unique identifier (or GUID).

Int16

An integral type representing signed 16-bit integers with values between -32768 and 32767.

Int32

An integral type representing signed 32-bit integers with values between -2147483648 and 2147483647.

Int64

An integral type representing signed 64-bit integers with values between -9223372036854775808 and 9223372036854775807.

Object

A general type representing any reference or value type not explicitly represented by another DbType value.

SByte

An integral type representing signed 8-bit integers with values between -128 and 127.

Single

A floating point type representing values ranging from approximately 1.5 x 10 to 3.4 x 10 with a precision of 7 digits.

String

A type representing Unicode character strings.

StringFixedLength

A fixed-length string of Unicode characters.

Time

A type representing a SQL Server DateTime value. If you want to use a SQL Server time value, use SqlDbType.Time.

UInt16

An integral type representing unsigned 16-bit integers with values between 0 and 65535.

UInt32

An integral type representing unsigned 32-bit integers with values between 0 and 4294967295.

UInt64

An integral type representing unsigned 64-bit integers with values between 0 and 18446744073709551615.

VarNumeric

A variable-length numeric value.

Xml

A parsed representation of an XML document or fragment.

Requirements

Namespace: System.Data
Assembly: System.Data (in System.Data.dll)
Assembly Versions: 1.0.3300.0, 1.0.5000.0, 2.0.0.0