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 _
Implements IXmlSerializable
用法
Dim instance As DataType
public class DataType : IXmlSerializable
public ref class DataType : IXmlSerializable
type DataType =
class
interface IXmlSerializable
end
public class DataType implements IXmlSerializable
DataType 类型公开以下成员。
构造函数
| 名称 | 说明 | |
|---|---|---|
.gif "公共方法") |
DataType() () () () | Initializes a new instance of the DataType class. |
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DataType(SqlDataType) | Initializes a new instance of the DataType class based on a specified SQL Server data type. |
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DataType(UserDefinedDataType) | Initializes a new instance of the DataType class based on a specified user-defined data type. |
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DataType(UserDefinedTableType) | Initializes a new instance of the DataType class based on a specified user-defined table type. |
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DataType(UserDefinedType) | Initializes a new instance of the DataType class based on a specified user-defined type. |
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DataType(XmlSchemaCollection) | Initializes a new instance of the DataType class based on a specified XML schema collection. |
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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. |
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DataType(SqlDataType, String) | Initializes a new instance of the DataType class based on a specified SQL Server data type with the specified type. |
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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. |
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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 | |
|---|---|---|
.gif "公共属性") .gif "静态成员") |
BigInt | Gets a data type that specifies the BigInt definition used in the data type. |
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Bit | Gets a data type that specifies the Bit definition used in the data type. |
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Date | The Date property returns a Date data type. |
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DateTime | Gets a data type that specifies the DateTime definition used in the data type. |
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Float | Gets a data type that specifies the Float definition used in the data type. |
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Geography | The geography data type 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. |
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Geometry | The Geometry property contains spatial data that represents information about the physical location and shape of geometric objects. |
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HierarchyId | The HierarchyId property is used to identify a position in a hierarchy. |
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Image | Gets a data type that specifies the Image definition used in the data type. |
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Int | Gets a data type that specifies the Int definition used in the data type. |
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MaximumLength | Gets the maximum length of the data type. |
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Money | Gets a data type that specifies the Money definition used in the data type. |
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Name | Gets the name of the data type. |
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NText | Gets a data type that specifies the NText definition used in the data type. |
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NumericPrecision | Gets or sets the numeric precision of the data type. |
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NumericScale | Gets or sets the numeric scale of the data type. |
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NVarCharMax | Gets a data type that specifies the VarCharMax definition used in the data type. |
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Real | Gets a data type that specifies the Money definition used in the data type. |
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Schema | Gets or sets the schema of the data type. |
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SmallDateTime | Gets a data type that specifies the SmallDateTime definition used in the data type. |
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SmallInt | Gets a data type that specifies the SmallInt definition used in the data type. |
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SmallMoney | Gets a data type that specifies the SmallMoney definition used in the data type. |
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SqlDataType | Gets a data type that specifies the SqlDataType definition used in the data type. |
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SysName | Gets a data type that specifies the SysName definition used in the data type. |
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Text | Gets a data type that specifies the Text definition used in the data type. |
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Timestamp | Gets a data type that specifies the TimeStamp definition used in the data type. |
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TinyInt | Gets a data type that specifies the TinyInt definition used in the data type. |
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UniqueIdentifier | Gets a data type that specifies the UniqueIdentifier definition used in the data type. |
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VarBinaryMax | Gets a data type that specifies the VarBinaryMax definition used in the data type. |
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VarCharMax | Gets a data type that specifies the VarCharMax definition used in the data type. |
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Variant | Gets a data type that specifies the Variant definition used in the data type. |
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XmlDocumentConstraint | Gets or sets a value that indicates how an XML document is formatted. |
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方法
| 名称 | 说明 | |
|---|---|---|
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Binary | Returns an object that represents the specified type. |
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Char | Returns an object that represents the specified type. |
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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. |
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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. |
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Decimal | Returns an object that represents the specified type. |
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Equals(Object) | Determines whether the specified object is considered equal to the current data type. （覆盖 Object. . :: . .Equals(Object)。） |
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Equals(DataType) | Determines whether the specified data types are considered equal. |
.gif "受保护方法") |
Finalize | （从 Object 继承。） |
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GetHashCode | This method supports the SQL Server infrastructure and is not intended to be used directly from your code. （覆盖 Object. . :: . .GetHashCode() () () ()。） |
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GetType | （从 Object 继承。） |
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MemberwiseClone | （从 Object 继承。） |
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NChar | Returns an object that represents the specified type. |
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Numeric | Returns an object that represents the specified type. |
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NVarChar | Returns an object that represents the specified type. |
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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 eight positions and contains the time in hours, minutes, seconds and fractional seconds. |
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ToString | Returns the object in string format. （覆盖 Object. . :: . .ToString() () () ()。） |
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UserDefinedDataType(String) | Returns an object that represents the specified type. |
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UserDefinedDataType(String, String) | Returns an object that represents the specified type with the specified schema. |
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UserDefinedTableType(String) | Returns an object that represents the specified type. |
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UserDefinedTableType(String, String) | Returns an object that represents the specified type with the specified schema. |
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UserDefinedType(String) | Returns an object that represents the specified type. |
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UserDefinedType(String, String) | Returns an object that represents the specified type with the specified schema. |
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VarBinary | Returns an object that represents the specified type. |
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VarChar | Returns an object that represents the specified type. |
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Xml(String) | Returns an object that represents the specified type. |
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Xml(String, String) | Returns an object that represents the specified type and with the specified schema. |
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Xml(String, String, XmlDocumentConstraint) | Returns an object that represents the specified type, schema and XML document constraint. |
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显式接口实现
| 名称 | 说明 | |
|---|---|---|
.gif "显式接口实现") .gif "私有方法") |
IXmlSerializable. . :: . .GetSchema | Not implemented. |
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IXmlSerializable. . :: . .ReadXml | Deserializes the DAC type properties from an XML stream. 标识为仅供参考。不提供支持。不保证以后的兼容性。. |
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IXmlSerializable. . :: . .WriteXml | Serializes the data type properties to an XML stream. 标识为仅供参考。不提供支持。不保证以后的兼容性。. |
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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是线程安全的。
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。