OracleParameter.IsNullable OracleParameter.IsNullable OracleParameter.IsNullable OracleParameter.IsNullable Property


获取或设置一个值,该值指示参数是否接受 null 值。Gets or sets a value that indicates whether the parameter accepts null values.

 virtual property bool IsNullable { bool get(); void set(bool value); };
public override bool IsNullable { get; set; }
member this.IsNullable : bool with get, set
Public Overrides Property IsNullable As Boolean


如果接受 null 值,则为 true;否则为 falsetrue if null values are accepted, otherwise false. 默认值为 falseThe default is false.


下面的示例创建OracleParameter和设置的某些属性。The following example creates a OracleParameter and sets some of its properties.

Public Sub CreateOracleParameter()  
   Dim parameter As New OracleParameter("DName", OracleType.VarChar, 14)  
   parameter.IsNullable = True  
   parameter.Direction = ParameterDirection.Output  
End Sub  
public void CreateOracleParameter()   
   OracleParameter parameter = new OracleParameter("DName", OracleType.VarChar, 14);  
   parameter.IsNullable = true;  
   parameter.Direction = ParameterDirection.Output;  


处理 null 值使用DBNull类。Null values are handled using the DBNull class.