DataType 类

The DataType object represents a SQL Server data type.

继承层次结构

System. . :: . .Object
  Microsoft.SqlServer.Management.Smo..::..DataType

命名空间：  Microsoft.SqlServer.Management.Smo
程序集：  Microsoft.SqlServer.Smo（在 Microsoft.SqlServer.Smo.dll 中）

语法

声明
Public Class DataType
用法
Dim instance As DataType

public class DataType

public ref class DataType

type DataType =  class end

public class DataType

DataType 类型公开以下成员。

构造函数

	名称	说明
	DataType() () () ()	Initializes a new instance of the DataType class.
	DataType(SqlDataType)	Initializes a new instance of the DataType class based on a specified SQL Server data type.
	DataType(UserDefinedDataType)	Initializes a new instance of the DataType class based on a specified user-defined data type.
	DataType(UserDefinedTableType)	Initializes a new instance of the DataType class based on a specified user-defined table type.
	DataType(UserDefinedType)	Initializes a new instance of the DataType class based on a specified user-defined type.
	DataType(XmlSchemaCollection)	Initializes a new instance of the DataType class based on a specified XML schema collection.
	DataType(SqlDataType, Int32)	Initializes a new instance of the DataType class based on a specified SQL Server data type with specified precision or maximum length.
	DataType(SqlDataType, String)	Initializes a new instance of the DataType class based on a specified SQL Server data type with the specified type.
	DataType(SqlDataType, Int32, Int32)	Initializes a new instance of the DataType class based on a specified SQL Server data type with the specified precision and scale.
	DataType(SqlDataType, String, String)	Initializes a new instance of the DataType class based on a specified SQL Server data type with the specified type and schema.

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属性

	名称	说明
	BigInt	Gets a data type that specifies the BigInt definition used in the data type.
	Bit	Gets a data type that specifies the Bit definition used in the data type.
	Date	The Date property returns a Date data type.
	DateTime	Gets a data type that specifies the DateTime definition used in the data type.
	Float	Gets a data type that specifies the Float definition used in the data type.
	Geography	The Geography datatype represents data in a round-earth coordinate system. The SQL Server geography data type stores ellipsoidal (round-earth) data, such as GPS latitude and longitude coordinates.
	Geometry	The Geometry property contains spatial data that represents information about the physical location and shape of geometric objects.
	HierarchyId	The HierarchyId property is used to identify a position in a hierarchy.
	Image	Gets a data type that specifies the Image definition used in the data type.
	Int	Gets a data type that specifies the Int definition used in the data type.
	MaximumLength	Gets the maximum length of the data type.
	Money	Gets a data type that specifies the Money definition used in the data type.
	Name	Gets the name of the data type.
	NText	Gets a data type that specifies the NText definition used in the data type.
	NumericPrecision	Gets or sets the numeric precision of the data type.
	NumericScale	Gets or sets the numeric scale of the data type.
	NVarCharMax	Gets a data type that specifies the NVarCharMax definition used in the data type.
	Real	Gets a data type that specifies the Real definition used in the data type.
	Schema	Gets or sets the schema of the data type.
	SmallDateTime	Gets a data type that specifies the SmallDateTime definition used in the data type.
	SmallInt	Gets a data type that specifies the SmallInt definition used in the data type.
	SmallMoney	Gets a data type that specifies the SmallMoney definition used in the data type.
	SqlDataType	Gets a data type that specifies the SqlDataType definition used in the data type.
	SysName	Gets a data type that specifies the SysName definition used in the data type.
	Text	Gets a data type that specifies the Text definition used in the data type.
	Timestamp	Gets a data type that specifies the TimeStamp definition used in the data type.
	TinyInt	Gets a data type that specifies the TinyInt definition used in the data type.
	UniqueIdentifier	Gets a data type that specifies the UniqueIdentifier definition used in the data type.
	VarBinaryMax	Gets a data type that specifies the VarBinaryMax definition used in the data type.
	VarCharMax	Gets a data type that specifies the VarCharMax definition used in the data type.
	Variant	Gets a data type that specifies the Variant definition used in the data type.
	XmlDocumentConstraint	Gets or sets a value that indicates how an XML document is formatted.

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方法

	名称	说明
	Binary	Returns an object that represents the specified type.
	Char	Returns an object that represents the specified type.
	DateTime2	DateTime2 is an extension of the existing DATETIME type. It has a large date range and large default fractional precision. It has a length of at least 19 positions.
	DateTimeOffset	Returns values for year, month, day, valid time of day between 00:00:00 and 23:59:59:9999999 and offset, in hours, from UTC. It has a length of at least 25 positions.
	Decimal	Returns an object that represents the specified type.
	Equals(Object)	（覆盖 Object. . :: . .Equals(Object)。）
	Equals(DataType)
	Finalize	（从 Object 继承。）
	GetHashCode	（覆盖 Object. . :: . .GetHashCode() () () ()。）
	GetType	（从 Object 继承。）
	MemberwiseClone	（从 Object 继承。）
	NChar	Returns an object that represents the specified type.
	Numeric	Returns an object that represents the specified type.
	NVarChar	Returns an object that represents the specified type.
	Time	Returns values for any valid time of day between 00:00:00 and 23:59:59:9999999. It has a length of at least 8 positions and contains the time in hours,minutes, seconds and fractional seconds.
	ToString	Returns the object in string format. （覆盖 Object. . :: . .ToString() () () ()。）
	UserDefinedDataType(String)	Returns an object that represents the specified type.
	UserDefinedDataType(String, String)	Returns an object that represents the specified type with the specified schema.
	UserDefinedTableType(String)	Returns an object that represents the specified type.
	UserDefinedTableType(String, String)	Returns an object that represents the specified type with the specified schema.
	UserDefinedType(String)	Returns an object that represents the specified type.
	UserDefinedType(String, String)	Returns an object that represents the specified type with the specified schema.
	VarBinary	Returns an object that represents the specified type.
	VarChar	Returns an object that represents the specified type.
	Xml(String)	Returns an object that represents the specified type.
	Xml(String, String)	Returns an object that represents the specified type and with the specified schema.
	Xml(String, String, XmlDocumentConstraint)	Returns an object that represents the specified type, schema and XML document constraint.

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注释

The DataType object is used to specify the type of data that is associated primarily with columns and parameters.

Thread Safety

此类型的任何公共静态（Microsoft Visual Basic 中的 Shared）成员在多线程操作中是安全的。 不保证所有实例成员都对于线程安全的。

示例

使用数据类型

线程安全

此类型的任何公共 static（在 Visual Basic 中为 Shared） 成员都是线程安全的。不保证所有实例成员都是线程安全的。

请参阅

参考

Microsoft.SqlServer.Management.Smo 命名空间