HasChild(Boolean) Method

Returns a Boolean expression indicating whether a row has a child row.

Syntax

Visual Basic

'Declaration
 
Public Overloads Function HasChild( _
   ByVal excludeHidden As Boolean _
) As Boolean

C#

public bool HasChild( 
   bool excludeHidden
)

Parameters

excludeHidden

If true only look for visible rows.

Return Value

true if a row has a child row.

Remarks

Invoke this method to determine whether a row has at least one child row. If a child row exists, this method returns True; otherwise, this method returns False.

The band argument can be used to specify a child band in which a child row should be sought. If band is not specified, this method attempts to find a child row in all child bands.

A reference to the first or last child row can be returned by invoking the GetChild method.

The HasParent, HasNextSibling, and HasPrevSibling methods can be invoked to determine if a row has a parent row, sibling row above it, and sibling row below it, respectively.

Example

Following code shows you how to traverse through all the rows in the UltraGrid. It finds out the number of regular rows (non-group-by rows) and number of group-by rows and shows the counts.

Visual Basic

Imports Infragistics.Shared
Imports Infragistics.Win
Imports Infragistics.Win.UltraWinGrid

  Private Sub TraverseAllRowsHelper(ByVal startRow As UltraGridRow, ByRef rowsCount As Integer, ByRef groupByRowsCount As Integer)

      Dim row As UltraGridRow = startRow

      While Not row Is Nothing
          If TypeOf row Is UltraGridGroupByRow Then
              ' Write code here to process the group by row.
              groupByRowsCount += 1
          Else
              ' Write code here to process the regular by row.
              rowsCount += 1
          End If

          ' If the row has any child rows, then process them too.
          If row.HasChild(False) Then
              Me.TraverseAllRowsHelper(row.GetChild(ChildRow.First), rowsCount, groupByRowsCount)
          End If

          row = row.GetSibling(SiblingRow.Next, True, False)
      End While

  End Sub

  Private Sub Button71_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button71.Click

      Dim rowsCount As Integer = 0
      Dim groupByRowsCount As Integer = 0

      ' Get the first row in the UltraGrid.
      Dim firstRow As UltraGridRow = Me.ultraGrid1.GetRow(ChildRow.First)

      ' Call the helper method which is a recursive implmentation for traversing rows.
      MessageBox.Show("Please wait. This operation may take a while depending on number of rows.")
      Me.TraverseAllRowsHelper(firstRow, rowsCount, groupByRowsCount)

      ' Show a dialog showing the number of regular rows and number of group-by rows.
      MessageBox.Show("The UltraGrid has " & rowsCount & " number of regular rows, and " & groupByRowsCount & " number of group-by rows.")

  End Sub

C#

using Infragistics.Shared;
using Infragistics.Win;
using Infragistics.Win.UltraWinGrid;
using System.Diagnostics;

private void TraverseAllRowsHelper( UltraGridRow startRow, ref int rowsCount, ref int groupByRowsCount )
{

	UltraGridRow row = startRow;

	while ( null != row )
	{				
		if ( row is UltraGridGroupByRow )
		{
			// Write code here to process the group by row.
			groupByRowsCount++;
		}
		else
		{
			// Write code here to process the regular by row.
			rowsCount++;
		}

		// If the row has any child rows, then process them too.
		if ( row.HasChild( false ) )
		{
			this.TraverseAllRowsHelper( row.GetChild( ChildRow.First ), ref rowsCount, ref groupByRowsCount );
		}

		row = row.GetSibling( SiblingRow.Next, true, false );
	}

}

private void button71_Click(object sender, System.EventArgs e)
{

	int rowsCount = 0;
	int groupByRowsCount = 0;

	// Get the first row in the UltraGrid.
	UltraGridRow firstRow = this.ultraGrid1.GetRow( ChildRow.First );

	// Call the helper method which is a recursive implmentation for traversing rows.
	MessageBox.Show( "Please wait. This operation may take a while depending on number of rows." );
	this.TraverseAllRowsHelper( firstRow, ref rowsCount, ref groupByRowsCount );

	// Show a dialog showing the number of regular rows and number of group-by rows.
	MessageBox.Show( "The UltraGrid has " + rowsCount + " number of regular rows, and " + groupByRowsCount + " number of group-by rows." );

}

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2