Drag and drop in GridControl

[aa]

hi,

i've a datagrid(GridControl) as shown as below:

Col1 Col2 Total
----- ------ ------ -----
Row1
Row2
Total

how do i prevent user drag the row or column after the Row Total or Col Total?

[haneefm]

Hi Lim,

You can prevent the column dragging by handling the QueryAllowDragColumnHeader event and setting the e.AllowDrag property to False to prevent from moving the column header in a grid. Here is a code snippet

private void gridQueryAllowDragColumnHeader(object sender, GridQueryDragColumnHeaderEventArgs e)
{
if( e.InsertBeforeColumn >= 3 )
e.AllowDrag = false;
}

Best regards,
Haneef

[aa]

>Hi Lim,

You can prevent the column dragging by handling the QueryAllowDragColumnHeader event and setting the e.AllowDrag property to False to prevent from moving the column header in a grid. Here is a code snippet

private void gridQueryAllowDragColumnHeader(object sender, GridQueryDragColumnHeaderEventArgs e)
{
if( e.InsertBeforeColumn >= 3 )
e.AllowDrag = false;
}

Best regards,
Haneef


hi haneef,

The event does't fire, anything that i missed out?

Besides to control the dragging Column, how abount the Row header? My datagrid is a two dimensional grid(GridControl).

Thanks for help!

[haneefm]

Hi Lim,

You can handle the SelectionDragging event. The GridSelectionDragEventArgs contain information about source and destination range. For specified columns/rows you can then set e.Cancel = true. Below is a code snippet

[c#]
void gridControl1_SelectionDragging(object sender, GridSelectionDragEventArgs e)
{
if (e.Destination.IntersectsWith(GridRangeInfo.Row(5))) //5th row drag over
e.Cancel = true;
else if (e.Destination.IntersectsWith(GridRangeInfo.Row(3))) //3rd column drag over
e.Cancel = true;
}

Best regards,
Haneef

[aa]

hi haneef,

The method does't work fine...

The col and row cannot be dragged when i applied the code..

Could you please write me a demo project?
Urgent please..
Thanks!

[haneefm]

Hi Lim,

Here is a minimal sample that shows you "How to prevent the dragging of the selected rows or columns in a grid?".
GridControlSelectionDrag.zip

Best regards,
Haneef