{"id":107,"date":"2024-12-05T20:15:55","date_gmt":"2024-12-05T20:15:55","guid":{"rendered":"https:\/\/code.handwerkit.com\/?p=107"},"modified":"2025-02-20T14:31:42","modified_gmt":"2025-02-20T14:31:42","slug":"c-richtextbox-wordwrap-2","status":"publish","type":"post","link":"https:\/\/code.handwerkit.com\/?p=107","title":{"rendered":"C# DataGridView Drag and Drop"},"content":{"rendered":"\n

Ein DateGridView mit Drag and Drop der gesamten Zeile.
– Multiselect m\u00f6glich (verschiebt alle markierten Zeilen)
– Beh\u00e4llt die selektieren Zeilen nach dem ablegen
– Zeigt einen visuellen Strich am Einf\u00fcgepunkt ober oder unterhalb der Zeile
– Scrollt automatisch hoch\/runter<\/p>\n\n\n\n

<\/p>\n\n\n\n

\n \/\/works with multiselect rows\n \/\/shows divider\n \/\/todo after dragover click on multiselect rows deselect it\n private static int rowIndexFrom = -1;\n private static int rowIndexTo = -1;\n private static int[] dataGridViewSelectedRows = null;\n private void dataGridView1_Paint(object sender, PaintEventArgs e)\n {\n     if (rowIndexTo == -1) return;\n     var dataGridView = sender as DataGridView;\n     var rect = dataGridView1.GetRowDisplayRectangle(rowIndexTo, false);\n     int posY = (rowIndexTo > rowIndexFrom && !dataGridView.Rows[rowIndexTo].IsNewRow)\n                ? rect.Bottom : rect.Top;\n     using (var pen = new Pen(Color.FromArgb(150, 33, 186, 71), 7))\n         e.Graphics.DrawLine(pen, new Point(rect.Left, posY - 1), new Point(rect.Right, posY - 1));\n     \n }\n private void dataGridView1_MouseMove(object sender, MouseEventArgs e)\n {\n }\n private void dataGridView1_MouseDown(object sender, MouseEventArgs e)\n {\n     if ((e.Button & MouseButtons.Left) != MouseButtons.Left) { rowIndexTo = -1; return; }\n     var dataGridView = sender as DataGridView;\n     if (!dataGridView1.AllowDrop || dataGridView.ReadOnly || dataGridView.SelectedRows.Count == 0) { rowIndexTo = -1; return; }\n     var hitTestInfo = dataGridView.HitTest(e.X, e.Y);\n     if (hitTestInfo.ColumnIndex == -1)\n     {\n         \n     }\n     foreach (DataGridViewRow row in dataGridView.SelectedRows)\n         if (row.IsNewRow) row.Selected = false;\n     dataGridViewSelectedRows = dataGridView.SelectedRows.Cast().Select(row => row.Index).ToArray();\n     if (dataGridView1.SelectedRows.Count == 0) { rowIndexFrom = -1; return; }\n     rowIndexFrom = hitTestInfo.RowIndex;\n     if (dataGridViewSelectedRows.Contains(rowIndexFrom))\n     {\n         dataGridView.EndEdit();\n         Task.Factory.StartNew(() =>\n         {\n             dataGridView.Invoke(new Action(() =>\n             {\n                 if (dataGridViewSelectedRows?.Length > 1)\n                     foreach (int row in dataGridViewSelectedRows) dataGridView.Rows[row].Selected = true;\n                 if (rowIndexFrom != -1 && dataGridView.Rows.Count >= dataGridViewSelectedRows?.Length)\n                     dataGridView.DoDragDrop(0, DragDropEffects.Move);\n             }));\n         });\n     }\n }\n private void dataGridView1_DragOver(object sender, DragEventArgs e)\n {\n     if (rowIndexFrom == -1) return;\n     var dataGridView = sender as DataGridView;\n     if (!dataGridView.AllowDrop || dataGridView.ReadOnly || dataGridView.SelectedRows.Count <= 0) { rowIndexTo = -1; return; }\n     e.Effect = DragDropEffects.Move;\n     try\n     {\n        \n         Point clientPointer = dataGridView.PointToClient(new Point(e.X, e.Y));\n         rowIndexTo = dataGridView.HitTest(clientPointer.X, clientPointer.Y).RowIndex;\n         if (dataGridView.Rows[rowIndexTo].IsNewRow) { rowIndexTo--; }\n         \n     }\n     catch\n     {\n         rowIndexTo = -1;\n     }\n     if (dataGridViewSelectedRows?.Length > 1 && dataGridViewSelectedRows.Contains(rowIndexTo) && dataGridViewSelectedRows.Contains(rowIndexTo - 1))\n     {\n         rowIndexTo = -1;\n     }\n     #region Scrollen beim Verschieben von Zeilen\n     Point clientPoint = dataGridView.PointToClient(new Point(e.X, e.Y));\n     \/\/Converts window position to user control position (otherwise you can use MousePosition.Y)\n     int mousepos = PointToClient(Cursor.Position).Y;\n     \/\/If the mouse is hovering over the bottom 5% of the grid\n     if (mousepos > (dataGridView1.Location.Y + (dataGridView1.Height * 0.95)))\n     {\n         mouseMoveDown = true;\n         \/\/If the first row displayed isn't the last row in the grid\n         if (dataGridView1.FirstDisplayedScrollingRowIndex < dataGridView1.RowCount - 1)\n         {\n             \/\/Increase the first row displayed index by 1 (scroll down 1 row)\n             int firstDisplRow = dataGridView1.FirstDisplayedScrollingRowIndex;\n             if (dataGridView1.Rows[firstDisplRow + 1].Displayed)\n             {\n                 Thread.Sleep(60);\n                 dataGridView1.FirstDisplayedScrollingRowIndex = dataGridView1.FirstDisplayedScrollingRowIndex + 1;\n             }\n         }\n     }\n     \/\/If the mouse is hovering over the top 5% of the grid\n     if (mousepos < (dataGridView1.Location.Y + (dataGridView1.Height * 0.55)))\n     {\n         mouseMoveDown = false;\n         \/\/If the first row displayed isn't the first row in the grid\n         if (dataGridView1.FirstDisplayedScrollingRowIndex > 1)\n         {\n             int firstDisplRow = dataGridView1.FirstDisplayedScrollingRowIndex;\n             Thread.Sleep(60);\n             dataGridView1.FirstDisplayedScrollingRowIndex -= 1;\n         }\n     }\n     #endregion\n     dataGridView.Refresh();\n }\n private void dataGridView1_DragDrop(object sender, DragEventArgs e)\n {\n     if (rowIndexTo == -1) return;\n     var dataGridView = sender as DataGridView;\n     if (!dataGridView.AllowDrop || dataGridView.ReadOnly || dataGridView.SelectedRows.Count <= 0) { rowIndexTo = -1; dataGridView.Refresh(); return; }\n     if (rowIndexTo == rowIndexFrom && dataGridView.SelectedRows.Count == 1) { rowIndexTo = -1; dataGridView.Refresh(); return; }\n     if (rowIndexTo == -1) { dataGridView.Refresh(); return; }\n     if (e.Effect == DragDropEffects.Move)\n     {\n         dataGridView.Invoke(new Action(() =>\n         {\n             List rowsToMove = dataGridView.SelectedRows.Cast().OrderBy(row => row.Index).ToList();\n             bool indexInbetweenRows = rowIndexTo > rowsToMove.Min(row => row.Index) && rowIndexTo < rowsToMove.Max(row => row.Index);\n             if (indexInbetweenRows) rowIndexTo = rowsToMove.Min(row => row.Index);\n             rowIndexTo = rowIndexFrom >= rowIndexTo ? rowIndexTo : rowIndexTo - (rowsToMove.Count - 1);\n             foreach (DataGridViewRow row in rowsToMove) dataGridView.Rows.Remove(row);\n             int insertIndex = rowIndexTo;\n             rowsToMove.ForEach(row => dataGridView.Rows.Insert(insertIndex++, row));\n             dataGridView.ClearSelection();\n             dataGridView.CurrentCell = dataGridView.Rows[rowIndexTo].Cells[dataGridView.FirstDisplayedCell.ColumnIndex];\n             rowsToMove.ForEach(row => row.Selected = true);\n         }));\n     }\n     rowIndexTo = -1;\n     dataGridView.Refresh();\n }\n private void dataGridView1_MouseLeave(object sender, EventArgs e)\n {\n     rowIndexTo = -1; \n     dataGridView1.Refresh();\n }\n<\/code><\/pre><\/div>\n\n\n\n
\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
Ein DateGridView mit Drag and Drop der gesamten Zeile.– Multiselect m\u00f6glich (verschiebt alle markierten Zeilen)– Beh\u00e4llt die selektieren Zeilen nach dem ablegen– Zeigt einen visuellen Strich am Einf\u00fcgepunkt ober oder unterhalb der Zeile– Scrollt automatisch hoch\/runter<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,3],"tags":[6,35,36,37],"class_list":["post-107","post","type-post","status-publish","format-standard","hentry","category-c-net","category-winform","tag-c","tag-datagridview","tag-drag-and-drop","tag-rows","entry"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"post-thumbnail":false},"uagb_author_info":{"display_name":"Rooout","author_link":"https:\/\/code.handwerkit.com\/?author=1"},"uagb_comment_info":3,"uagb_excerpt":"Ein DateGridView mit Drag and Drop der gesamten Zeile.– Multiselect m\u00f6glich (verschiebt alle markierten Zeilen)– Beh\u00e4llt die selektieren Zeilen nach dem ablegen– Zeigt einen visuellen Strich am Einf\u00fcgepunkt ober oder unterhalb der Zeile– Scrollt automatisch hoch\/runter","_links":{"self":[{"href":"https:\/\/code.handwerkit.com\/index.php?rest_route=\/wp\/v2\/posts\/107","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/code.handwerkit.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/code.handwerkit.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/code.handwerkit.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/code.handwerkit.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=107"}],"version-history":[{"count":6,"href":"https:\/\/code.handwerkit.com\/index.php?rest_route=\/wp\/v2\/posts\/107\/revisions"}],"predecessor-version":[{"id":129,"href":"https:\/\/code.handwerkit.com\/index.php?rest_route=\/wp\/v2\/posts\/107\/revisions\/129"}],"wp:attachment":[{"href":"https:\/\/code.handwerkit.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=107"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/code.handwerkit.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=107"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/code.handwerkit.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}