ForeignKeyConstraint.UpdateRule 속성

정의

네임스페이스:

System.Data

어셈블리:

System.Data.Common.dll

Source:

ForeignKeyConstraint.cs

행이 업데이트될 때 이 제약 조건에 발생하는 동작을 가져오거나 설정합니다.

public:
 virtual property System::Data::Rule UpdateRule { System::Data::Rule get(); void set(System::Data::Rule value); };

public virtual System.Data.Rule UpdateRule { get; set; }

member this.UpdateRule : System.Data.Rule with get, set

Public Overridable Property UpdateRule As Rule

속성 값

Rule

Rule 값 중 하나입니다. 기본값은 Cascade입니다.

예제

다음 예제에서는 을 ForeignKeyConstraint만들고, 다양한 속성을 설정하고, 개체의 ConstraintCollection에 DataTable 추가합니다.

' The next line goes into the Declarations section of the module:
' SuppliersProducts is a class derived from DataSet.
Private suppliersProducts As SuppliersProducts 

Private Sub CreateConstraint()
   ' Declare parent column and child column variables.
   Dim parentColumn As DataColumn
   Dim childColumn As DataColumn
   Dim fkConstraint As ForeignKeyConstraint

   ' Set parent and child column variables.
   parentColumn = suppliersProducts.Tables("Suppliers").Columns("SupplierID")
   childColumn = suppliersProducts.Tables("Products").Columns("SupplieriD")
   fkConstraint = New ForeignKeyConstraint( _
       "SuppierFKConstraint", parentColumn, childColumn)

   ' Set null values when a value is deleted.
   fkConstraint.DeleteRule = Rule.SetNull
   fkConstraint.UpdateRule = Rule.Cascade
   fkConstraint.AcceptRejectRule = AcceptRejectRule.Cascade

   ' Add the constraint, and set EnforceConstraints to true.
   suppliersProducts.Tables("Suppliers").Constraints.Add(fkConstraint)
   suppliersProducts.EnforceConstraints = True
End Sub

추가 정보

• AcceptRejectRule
• Rule