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deleting child rows in a hierarchical

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13894 May 13,2004 12:28 AM May 13,2004 06:05 AM Windows Forms 2
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Tags: GridControl
Syl
Asked On May 13, 2004 12:28 AM

Hi I have a old and very important problem in a VB.NET app. I use a GridDataBoundGrid as a hierarchical with 2 tables. Everything works fine instead of child row delete. I can reproduce it in the little project attached... This project was created by you for someone in the forum.... UpdateableExpandGrid_VB_3994.zip So, in this project, you cant add a new child to a row, after deleting all their child... The little cross in the left disappears... How to solve that problem? Just for info, I use Syncfusion 2051. Thanks a lot! bye Syl

Administrator [Syncfusion]
Replied On May 13, 2004 02:47 AM

In the sample I added a InsertChildAtCurrentRow button using the code in the handler below. It seems to work. Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim cc As GridCurrentCell = Me.gridDataBoundGrid1.CurrentCell Dim rs As GridBoundRecordState = Me.gridDataBoundGrid1.Binder.GetRecordStateAtRowIndex(cc.RowIndex) ''add a new record to the child level Dim o As Object = rs.ListManager.Current Dim drv As DataRowView = CType(o, DataRowView) Dim dr As DataRow = drv.Row If rs.LevelIndex < 2 Then Dim dt As DataTable = Me.dSet.Tables(rs.LevelIndex + 1) ''get the table Dim newRow As DataRow = dt.NewRow() Dim values As Object() = Nothing Select Case rs.LevelIndex Case 0 Me.numberOfChildren += 1 ''pkValue = this.numberOfChildren; values = New Object() {Me.numberOfChildren, String.Format("ChildName{0}", Me.numberOfChildren), dr(0)} Case 1 Me.numberOfGrandChildren += 1 ''pkValue = this.numberOfGrandChildren; values = New Object() {Me.numberOfGrandChildren, String.Format("GrandChildName{0}", numberOfGrandChildren), dr(0), dt.Columns("FavSport").DefaultValue} Case Else Throw New IndexOutOfRangeException("Improper index") End Select newRow.ItemArray = values dt.Rows.Add(newRow) Dim parentLevel As Integer = rs.LevelIndex - 1 If rs.LevelIndex = 0 Then Me.gridDataBoundGrid1.Model.BeginUpdate() Dim dt1 As DataTable = Me.gridDataBoundGrid1.DataSource Me.gridDataBoundGrid1.DataSource = Nothing Me.gridDataBoundGrid1.DataSource = dt1 Me.gridDataBoundGrid1.EndUpdate() Else Dim row As Integer = cc.RowIndex - 1 If row > Me.gridDataBoundGrid1.Model.Rows.HeaderCount Then Me.gridDataBoundGrid1.Model.BeginUpdate() Me.gridDataBoundGrid1.CollapseAtRowIndex(row) Me.gridDataBoundGrid1.ExpandAtRowIndex(row) Me.gridDataBoundGrid1.CollapseAtRowIndex(row) Me.gridDataBoundGrid1.ExpandAtRowIndex(row) Me.gridDataBoundGrid1.Model.EndUpdate() End If End If End If End Sub

Syl
Replied On May 13, 2004 06:05 AM

Magnifique! Thanks a lot Super-Clay After some little update to fit in my project, it''s working fine Thanks again! bye syl

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