We can derive from DataGridView and add the required tree functionality to it. NET DataGridView control as the basis and extend its look and functionality as if we incorporated TreeView into one of its columns. To implementing TreeView in DataGridView, we can use the standard. WinForms DataGridView with TreeView features Let's look at both approaches more carefully. Second, you can use another control like our 10Tec WinForms grid that provides you with both DataGridView and TreeView features. First, you can try to extend the standard DataGridView to add TreeView functions to it.
If you need the functionality like this in your application, you can go two different ways.
It is not only a static visual representation: the nodes in the first column are clickable like in a real TreeView control so you can collapse/expand rows. The error isnt triggered during the initial compile, butĪs you scroll through the data on the grid while its running.The grid above looks like TreeView in DataGridView control. Resetting back to zero when it reaches column 11 or 12. The problem I am running into is it appears the column Index value is Unlike your code, I dont want the other columns to be changed to Nothing so IĬommented out If IsRepeatedCellValue(args.RowIndex, args.ColumnIndex) Then'args.Value = String.Empty args.FormattingApplied = TrueEndIf There is an ID column on the datatable that tells me what to group together. Cells(colIndex), I made it static becauseīasically, here is what I am trying to do:
#Datagridview group rows code
Dim currCell As DataGridViewCell = Rows(rowIndex).Cells(0)ĭim prevCell As DataGridViewCell = Rows(rowIndex - 1).Cells(0)In your code you called the. Source ''' ''' Original author''' ''' ''' ''' Original code was in C Sharp, I converted and tweaked some code''' which did not compile under VB.NET''' Public Class GroupByGrid Inherits DataGridView Protected Overrides Sub OnCellFormatting(ByVal args As DataGridViewCellFormattingEventArgs) MyBase.OnCellFormatting(args) ' First row always displays If args.RowIndex = 0 Then Return End If If IsRepeatedCellValue(args.RowIndex, args.ColumnIndex) Then args.Value = String.Empty args.FormattingApplied = True End If End Sub Private Function IsRepeatedCellValue(ByVal rowIndex As Integer, ByVal colIndex As Integer) As Boolean Dim currCell As DataGridViewCell = Rows(rowIndex).Cells(colIndex) Dim prevCell As DataGridViewCell = Rows(rowIndex - 1).Cells(colIndex) If (currCell.Value Is prevCell.Value) OrElse (currCell.Value IsNot Nothing AndAlso prevCell.Value IsNot Nothing AndAlso () = ()) Then Return True Else Return False End If End Function Protected Overrides Sub OnCellPainting(ByVal args As DataGridViewCellPaintingEventArgs) MyBase.OnCellPainting(args) = DataGridViewAdvancedCellBorderStyle.None ' Ignore column and row headers and first row If args.RowIndex < 1 OrElse args.ColumnIndex < 0 Then Return End If If IsRepeatedCellValue(args.RowIndex, args.ColumnIndex) Then = DataGridViewAdvancedCellBorderStyle.None Else = AdvancedCellBorderStyle.Top End If End SubEnd Class Here is a custom DataGridView that you add to your project, compile, add the DataGridView to a form, set the DataSource of the DataGridView to say a DataTable with repeating data, build, run, should look like the image below as a sample.
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