Is there a datagrid mouse down hit test to get the row and column index of the click?

Question

With Winforms' DataGridView, one could use HitTest to determine the column and row index of the mouse down (and other events).

Dim hti As DataGridView.HitTestInfo = sender.HitTest(e.X, e.Y)

Is there something similar with WPF's DataGrid? I need to get the row and column indexes for the MouseLeftButtonDown event.

Answer 1

It's a bit more complicated than this but the following links should be helpful in getting the index of the row and column.

WPF DataGrid - detecting the column, cell and row that has been clicked: http://blog.scottlogic.com/2008/12/02/wpf-datagrid-detecting-clicked-cell-and-row.html

WPF DataGrid - get row number which mouse cursor is on

You will have to use the VisualTreeHelper class to traverse the Visual elements that make up the DataGrid as explained above.

Answer 2

For those that may wish to avoid my search here is the total code I ended up puzzling together that is able to deliver:

1. Current row index

2. Current Column index

3. Current Column header And

4. is able to expose the value/s of columns on the row.

   The code goes into MouseLeftButtonup event and DGrid1 is the name of the grid

   Dim currentRowIndex As Integer = -1
   Dim CurrentColumnIndex As Integer = -1
   Dim CurrentColumnHeader As String = ""
   Dim Myrow As DataRowView = Nothing
   Dim dep As DependencyObject = DirectCast(e.OriginalSource, DependencyObject)
   While dep IsNot Nothing And Not TypeOf dep Is DataGridCell And Not TypeOf dep Is Primitives.DataGridColumnHeader
       dep = VisualTreeHelper.GetParent(dep)
       If dep IsNot Nothing Then
           If TypeOf dep Is DataGridCell Then
               Dim cell As DataGridCell = DirectCast(dep, DataGridCell)
               Dim col As DataGridBoundColumn = DirectCast(cell.Column, DataGridBoundColumn)
               Myrow = DGrid1.SelectedItem
               CurrentColumnHeader = col.Header.ToString
               CurrentColumnIndex = col.DisplayIndex
               currentRowIndex = DGrid1.Items.IndexOf(DGrid1.CurrentItem)
               Exit While
           End If
       End If
   End While
   If currentRowIndex = -1 OrElse CurrentColumnIndex = -1 OrElse CurrentColumnHeader = "" OrElse Myrow Is Nothing Then Exit Sub
   
        'code to consume the variables from here
   
   Dim strinwar As String = Myrow.Item("header name or index").ToString()