OracleParameter.DbType 属性
定义
public:
property System::Data::DbType DbType { System::Data::DbType get(); void set(System::Data::DbType value); };
public:
virtual property System::Data::DbType DbType { System::Data::DbType get(); void set(System::Data::DbType value); };
[System.ComponentModel.Browsable(false)]
public System.Data.DbType DbType { get; set; }
public override System.Data.DbType DbType { get; set; }
[<System.ComponentModel.Browsable(false)>]
member this.DbType : System.Data.DbType with get, set
member this.DbType : System.Data.DbType with get, set
Public Property DbType As DbType
Public Overrides Property DbType As DbType
属性值
DbType 值之一。One of the DbType values. 默认值为 AnsiString。The default is AnsiString.
实现
- 属性
例外
示例
下面的示例创建 OracleParameter 并设置其一些属性。The following example creates an OracleParameter and sets some of its properties.
public void CreateOracleDbParameter()
{
OracleParameter parameter = new OracleParameter();
parameter.ParameterName = "pDName";
parameter.DbType = DbType.String;
parameter.Value = "ENGINEERING";
parameter.SourceColumn = "DName";
}
Public Sub CreateOracleDbParameter()
Dim parameter As New OracleParameter()
parameter.ParameterName = "pDName"
parameter.DbType = DbType.String
parameter.Value = "ENGINEERING"
parameter.SourceColumn = "DName"
End Sub
注解
OracleType和 DbType 已链接。The OracleType and DbType are linked. 因此,将 DbType 更改设置 OracleType 为支持 OracleType 。Therefore, setting the DbType changes the OracleType to a supporting OracleType.
DbType OracleType Size 可以通过设置来推断参数的、和属性 Value 。The DbType, OracleType, and Size properties of a parameter can be inferred by setting Value. 因此,您不需要指定它们。Therefore, you are not required to specify them. 但是,它们不会在 OracleParameter 属性设置中公开。However, they are not exposed in OracleParameter property settings. 例如,如果已推断出参数的大小,则不 Size 会在语句执行后包含推断值。For example, if the size of the parameter has been inferred, Size does not contain inferred value after statement execution. 对于 String 数据类型,默认值为 AnsiString 。For String data types the default is AnsiString.
有关支持的数据类型的列表,请参阅相应 OracleType 成员。For a list of the supported data types, see the appropriate OracleType member. 有关详细信息,请参阅 DataAdapter 参数。For more information, see DataAdapter Parameters.