Value representing where the root table of the self referencing table point to.

Syntax

Visual Basic (Declaration)
Public Enum ParentRootMode Inherits System.Enum

Visual Basic (Usage)	Copy Code
Dim instance As ParentRootMode

C#
public enum ParentRootMode : System.Enum

Delphi
public enum ParentRootMode = class(System.Enum)

JScript
public enum ParentRootMode extends System.Enum

Managed Extensions for C++
__value public enum ParentRootMode : public System.Enum

C++/CLI
public enum class ParentRootMode : public System.Enum

Members

Member	Description
NullValue	NullValue is a property to show self reference table based on null value.
SelfReferencingNode	SelfReferencingNode is a property to show the self reference table based on only the parent node which has reference.
UseParentRootValue	UseParentrootValue is a property to show self reference table based on the parent value.

Example

Sample codes below is recommended to be placed inside PrepareDataBinding event if Runtime Data Binding method is utilized, but if DesignTime Data Binding method is utilized, then it's safe to place the codes inside InitializeLayout or PrepareDataBinding event since the columns collection have been determined earlier using DesignTime Data Binding.

C#	Copy Code
WebGrid1.RootTable.SelfReferencingSettings.Enabled = true; WebGrid1.RootTable.SelfReferencingSettings.ParentDataMember = "EmployeeID"; WebGrid1.RootTable.SelfReferencingSettings.ChildDataMember = "ReportsTo"; WebGrid1.RootTable.SelfReferencingSettings.ExpandColumnMember = "FirstName"; WebGrid1.RootTable.SelfReferencingSettings.ParentRootMode = ISNet.WebUI.WebGrid.ParentRootMode.UseParentRootValue; // A DropDownList is configured with a collection of the possible values of ParentRootValue WebGrid1.RootTable.SelfReferencingSettings.ParentRootValue = Int32.Parse(DropDownList1.SelectedItem.Value);

Copy Code

WebGrid1.RootTable.SelfReferencingSettings.Enabled = true;
WebGrid1.RootTable.SelfReferencingSettings.ParentDataMember = "EmployeeID";
WebGrid1.RootTable.SelfReferencingSettings.ChildDataMember = "ReportsTo";
WebGrid1.RootTable.SelfReferencingSettings.ExpandColumnMember = "FirstName";
WebGrid1.RootTable.SelfReferencingSettings.ParentRootMode = ISNet.WebUI.WebGrid.ParentRootMode.UseParentRootValue;
// A DropDownList is configured with a collection of the possible values of ParentRootValue
WebGrid1.RootTable.SelfReferencingSettings.ParentRootValue = Int32.Parse(DropDownList1.SelectedItem.Value);

Remarks

ParentRootMode is a setting in WebGrid.NET with Self Reference. There are three options of ParentRootMode to determine where the self referencing table point to: UseParetRootValue, NullValue, SelfReferencingNode. In order to use ParentRootMode based on the UseParentRootValue, we need to define some major SelfReference settings.

There are 4 major properties which need to be placed in order to configure Self Referencing table. They are Enabled, ParentDataMember, ChildDataMember and ExpandColumnMember. Since we would like to designate a value other than 'Null' value as the ParentRootValue then the ParentRootMode property as well as ParentRootValue property need to be configured.

Inheritance Hierarchy

System.Object
   System.ValueType
      System.Enum
         ISNet.WebUI.WebGrid.ParentRootMode

Requirements

Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family

Intersoft WebGrid Documentation
ParentRootMode Enumeration
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