Grid node index no.

Jenny Tan

March 25, 2012 15:58

Hi,

 

If the grid got children, when clicked the one of row's children header, how to know the parent row is in which rows for the grid?

How to get node index no. for the parent row?

Regards, 

Jenny

0

• 

  Dapfor Team

  March 25, 2012 20:57

  Hi,

  Here is a code, demonstrating how to get a parent row when the user clicks on a child header:

   

  grid.MouseClick += delegate(object sender, MouseEventArgs e)
  {
      //Test the case when the user clicks on the child header
      Header header = grid.HitTests.HeaderTest(e.Location);
      if(header != null && header.Level > 0)
      {
          Row parentRow = null;
  
          //Get child header bounds
          Rectangle headerBounds = grid.HitTests.HeaderVisibleBoundsTest(e.Location);
          if(headerBounds.Height > 0 && headerBounds.Width > 0)
          {
              //Get the first visible row below the header
              Row row = grid.HitTests.RowTest(new Point(e.Location.X, headerBounds.Bottom));
              
              //if the row is found - get its parent.
              parentRow = row != null ? row.Parent : null;
          }
  
          if (parentRow != null)
          {
              //Do something
          }
      }
  };

   

  Best regards,

  Dapfor

  0
• 

  Jenny Tan

  March 26, 2012 07:36

  thx...

   

  How to change the child header's back color to gray when the user clicks on a child header?

   

  Regards,

  Jenny

  0
• 

  Dapfor Team

  March 26, 2012 08:59

  Hi,

  To do it, invalidate the child header in the MouseDown event handler: header.Invalidate()

  Then add the following code:

  grid.PaintColumnCaption += delegate(object sender, PaintColumnCaptionEventArgs e)

  {

      Point location = grid.PointToClient(Cursor.Position);

      Column column = grid.HitTests.ColumnTest(location);    

      if (column == e.Column && (MouseButtons & MouseButtons.Left) == MouseButtons.Left)    

      {

          e.Appearance.BackColor = Color.Gray;

      }

  };

   

  Best regards,

   Dapfor

  0
• 

  Jenny Tan

  March 27, 2012 03:51

  thanks a lot...

   

  Can i ask when the user clicks on the child header, then click a delete row button, how to get the parent row to delete the whole row in button click event?

   

  Regards,

  Jenny Tan

  0

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