DataGridBoolColumn.EnterNullValue 메서드

정의

네임스페이스:

System.Windows.Forms

어셈블리:

System.Windows.Forms.dll

열에 Value를 입력합니다.

protected public:
 override void EnterNullValue();

protected internal override void EnterNullValue ();

override this.EnterNullValue : unit -> unit

Protected Friend Overrides Sub EnterNullValue ()

예외

Exception

AllowNull 속성이 false로 설정되어 있습니다.

예제

다음 코드 예제에서는 를 사용하여 EnterNullValue 열에 null 값을 입력합니다.

private:

   void EnterNull()
   {
      
      // Creates an instance of a class derived from DataGridBoolColumn.
      MyDataGridBoolColumn^ colBool;
      colBool = dynamic_cast<MyDataGridBoolColumn^>(dataGrid1->TableStyles[ 0 ]->GridColumnStyles[ 2 ]);
      colBool->CallEnterNullValue();
   }


internal:

   // Class derived from DataGridBoolColumn.
   ref class MyDataGridBoolColumn: public DataGridBoolColumn
   {
   public:
      void CallEnterNullValue()
      {
         this->EnterNullValue();
      }

   };

private void EnterNull() {
   // Creates an instance of a class derived from DataGridBoolColumn.
   MyDataGridBoolColumn colBool;
   colBool = (MyDataGridBoolColumn)dataGrid1.TableStyles[0].GridColumnStyles[2];
   colBool.CallEnterNullValue();
}

// Class derived from DataGridBoolColumn.
internal class MyDataGridBoolColumn : DataGridBoolColumn {

   public void CallEnterNullValue() {
      this.EnterNullValue();
   }
}

Private Sub EnterNull()
   ' Creates an instance of a class derived from DataGridBoolColumn.
   Dim colBool As MyDataGridBoolColumn
   colBool = CType(dataGrid1.TableStyles(0).GridColumnStyles(2), MyDataGridBoolColumn)
   colBool.CallEnterNullValue()
End Sub    
    
 ' Class derived from DataGridBoolColumn.
Friend Class MyDataGridBoolColumn
   Inherits DataGridBoolColumn        
        
   Public Sub CallEnterNullValue()
      Me.EnterNullValue()
   End Sub
End Class

설명

null 값을 입력할 때 사용되는 실제 값을 설정하려면 속성을 사용합니다 NullValue .

추가 정보

• AllowNull
• NullValue