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VB.net Drag and drop from one cell on a DataGridView  to another

Posted on 2014-08-16
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Hi

What VB.net code would I use to drag from one DataGridView cell to another leaving both cells color as yellow and not dragging any values?
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Question by:Murray Brown
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LVL 40
ID: 40265082
What is the logic of dragging without transferring a value? This would be counter-intuitive for the user.
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by:Murray Brown
ID: 40265127
The logic is to highlight the cells as a pair
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Jacques Bourgeois (James Burger) earned 2000 total points
ID: 40265145
Personally, I feel that something like that would be better done another way.

When the user drags, he expects a transfer, either a copy or a move.

When he needs to select many elements together, the standard is Ctrl-Click.

Unless you use Ctrl-Click for something else in the grid, I would go that route. Not only will it be easier to code, but it will be more natural for the user. On the first Ctrl-Click, you set the first cell to yellow, and on the second Ctrl-Click, you set the second cell.

You can trap a Ctrl-Click with code like the following:

	Private Sub DataGridView1_CellClick(sender As Object, e As DataGridViewCellEventArgs) Handles DataGridView1.CellClick
		If Control.ModifierKeys = Keys.Control Then
			'Do what you need
		End If
	End Sub

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If you expect to make more than one such pairs, you should think of using different colors for each pair.
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by:Murray Brown
ID: 40265146
Thanks very much
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