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    <p>I found this <a href="http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/16b0a44e-35a0-4bc8-9ccd-ec2c62c95a55" rel="noreferrer">code sample</a> on MSDN</p> <p>Note the following:</p> <p>1). DataGridView property AllowDrop must be set to true (default is false).</p> <p>2). The example below works out of the box when the DataGridView is <strong>NOT</strong> data-bound. Otherwise it will throw an InvalidOperationException. If it is databound, you should manipulate the order of items in the <code>DataSource</code>.</p> <pre><code>private Rectangle dragBoxFromMouseDown; private int rowIndexFromMouseDown; private int rowIndexOfItemUnderMouseToDrop; private void dataGridView1_MouseMove(object sender, MouseEventArgs e) { if ((e.Button &amp; MouseButtons.Left) == MouseButtons.Left) { // If the mouse moves outside the rectangle, start the drag. if (dragBoxFromMouseDown != Rectangle.Empty &amp;&amp; !dragBoxFromMouseDown.Contains(e.X, e.Y)) { // Proceed with the drag and drop, passing in the list item. DragDropEffects dropEffect = dataGridView1.DoDragDrop( dataGridView1.Rows[rowIndexFromMouseDown], DragDropEffects.Move); } } } private void dataGridView1_MouseDown(object sender, MouseEventArgs e) { // Get the index of the item the mouse is below. rowIndexFromMouseDown = dataGridView1.HitTest(e.X, e.Y).RowIndex; if (rowIndexFromMouseDown != -1) { // Remember the point where the mouse down occurred. // The DragSize indicates the size that the mouse can move // before a drag event should be started. Size dragSize = SystemInformation.DragSize; // Create a rectangle using the DragSize, with the mouse position being // at the center of the rectangle. dragBoxFromMouseDown = new Rectangle(new Point(e.X - (dragSize.Width / 2), e.Y - (dragSize.Height / 2)), dragSize); } else // Reset the rectangle if the mouse is not over an item in the ListBox. dragBoxFromMouseDown = Rectangle.Empty; } private void dataGridView1_DragOver(object sender, DragEventArgs e) { e.Effect = DragDropEffects.Move; } private void dataGridView1_DragDrop(object sender, DragEventArgs e) { // The mouse locations are relative to the screen, so they must be // converted to client coordinates. Point clientPoint = dataGridView1.PointToClient(new Point(e.X, e.Y)); // Get the row index of the item the mouse is below. rowIndexOfItemUnderMouseToDrop = dataGridView1.HitTest(clientPoint.X, clientPoint.Y).RowIndex; // If the drag operation was a move then remove and insert the row. if (e.Effect== DragDropEffects.Move) { DataGridViewRow rowToMove = e.Data.GetData( typeof(DataGridViewRow)) as DataGridViewRow; dataGridView1.Rows.RemoveAt(rowIndexFromMouseDown); dataGridView1.Rows.Insert(rowIndexOfItemUnderMouseToDrop, rowToMove); } } </code></pre>
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    1. POHow could I Drag and Drop DataGridView Rows under each other?
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    1. USMike de Klerk
    1. USWahid Bitar
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    1. POHow could I Drag and Drop DataGridView Rows under each other?
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    1. COA link to the original article would be appreciated :) Thanks
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      1. USTeejay
    2. COActually it's from two years ago and I think it's from here : http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/16b0a44e-35a0-4bc8-9ccd-ec2c62c95a55
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    3. COthanks for your reply
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

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