Rule serializable

Rule serializable

System.Data (system.data.dll) enum

This enumeration is used to specify two properties of the ForeignKeyConstraint class: ForeignKeyConstraint.UpdateRule and ForeignKeyConstraint.DeleteRule . The value from this enumeration indicates what will happen to the related child rows when a change is made to a parent row. For example, by using a ForeignKeyConstraint.DeleteRule or Cascade , all child rows are removed when the parent row is deleted. If you use SetNull , the foreign key field in the child record is set to a null value. SetDefault restores the default value for the foreign key field; None performs no action .

 public enum  Rule  {  None = 0  ,  Cascade = 1  ,  SetNull = 2  ,  SetDefault = 3  } 

Hierarchy

System.Object figs/u2192.gif System.ValueType figs/u2192.gif System.Enum(System.IComparable, System.IFormattable , System.IConvertible) figs/u2192.gif Rule

Returned By

ForeignKeyConstraint.{DeleteRule , UpdateRule}

Passed To

ForeignKeyConstraint.{DeleteRule , ForeignKeyConstraint( ) , UpdateRule}



ADO. NET in a Nutshell
ADO.NET in a Nutshell
ISBN: 0596003617
EAN: 2147483647
Year: 2005
Pages: 415

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