質問編集履歴
3
コードを削除
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@@ -8,98 +8,6 @@
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（各メソッドに設けたデバッグポイントに止まりませんでした。）
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おそらく初歩的なところですみませんが、よろしくお願いします。
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###該当のソースコード
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```C#
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Text;
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using System.Windows.Forms;
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using System.Configuration;
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using System.Data.OleDb;
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using DailyReport.DB;
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namespace DailyReport
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{
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public partial class UserListForm : BaseForm
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{
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private Rectangle dragBoxFromMouseDown;
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private int rowIndexFromMouseDown;
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private int rowIndexOfItemUnderMouseToDrop;
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private void dataGridView1_MouseMove(object sender, MouseEventArgs e)
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{
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if ((e.Button & MouseButtons.Left) == MouseButtons.Left)
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{
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// If the mouse moves outside the rectangle, start the drag.
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if (dragBoxFromMouseDown != Rectangle.Empty &&
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!dragBoxFromMouseDown.Contains(e.X, e.Y))
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{
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// Proceed with the drag and drop, passing in the list item.
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DragDropEffects dropEffect = dataGridView1.DoDragDrop(
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dataGridView1.Rows[rowIndexFromMouseDown],
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DragDropEffects.Move);
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}
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}
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}
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private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
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{
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// Get the index of the item the mouse is below.
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rowIndexFromMouseDown = dataGridView1.HitTest(e.X, e.Y).RowIndex;
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if (rowIndexFromMouseDown != -1)
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{
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// Remember the point where the mouse down occurred.
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// The DragSize indicates the size that the mouse can move
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// before a drag event should be started.
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Size dragSize = SystemInformation.DragSize;
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// Create a rectangle using the DragSize, with the mouse position being
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// at the center of the rectangle.
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dragBoxFromMouseDown = new Rectangle(new Point(e.X - (dragSize.Width / 2),
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e.Y - (dragSize.Height / 2)),
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dragSize);
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}
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else
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// Reset the rectangle if the mouse is not over an item in the ListBox.
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dragBoxFromMouseDown = Rectangle.Empty;
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}
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private void dataGridView1_DragOver(object sender, DragEventArgs e)
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{
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e.Effect = DragDropEffects.Move;
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}
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private void dataGridView1_DragDrop(object sender, DragEventArgs e)
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{
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// The mouse locations are relative to the screen, so they must be
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// converted to client coordinates.
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Point clientPoint = dataGridView1.PointToClient(new Point(e.X, e.Y));
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// Get the row index of the item the mouse is below.
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rowIndexOfItemUnderMouseToDrop =
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dataGridView1.HitTest(clientPoint.X, clientPoint.Y).RowIndex;
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// If the drag operation was a move then remove and insert the row.
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if (e.Effect == DragDropEffects.Move)
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{
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DataTable dt = (DataTable)dataGridView1.DataSource;
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object[] rowArray = dt.Rows[rowIndexFromMouseDown].ItemArray;
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DataRow row = dt.NewRow();
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row.ItemArray = rowArray;
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dt.Rows.RemoveAt(rowIndexFromMouseDown);
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dt.Rows.InsertAt(row, rowIndexOfItemUnderMouseToDrop);
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}
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}
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＜他、ロードイベント等 省略＞
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}
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}
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```
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###試したこと
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DataGridViewのプロパティの問題かと思いましたが、該当するものを見つけられませんでした。
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2
リンク編集
title
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File without changes
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body
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@@ -1,7 +1,7 @@
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1
1
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###前提・実現したいこと
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2
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DataGridView内の行をドラッグ&ドロップで並び替えたいです。
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3
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下記を参考に、ほぼ同じコードにしているのですが、うまくいかず困っています。
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https://social.msdn.microsoft.com/Forums/ja-JP/e59a4043-6298-4653-809f-5c8fcf04f2e6/datagridview?forum=csharpgeneralja
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[リンク内容](https://social.msdn.microsoft.com/Forums/ja-JP/e59a4043-6298-4653-809f-5c8fcf04f2e6/datagridview?forum=csharpgeneralja)
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6
6
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###発生している問題・エラーメッセージ
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7
7
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そもそも画面上でドラッグ&ドロップができず、各イベントが生じない。
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1
初心者アイコンの追加
title
CHANGED
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File without changes
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body
CHANGED
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