Windows窗体MouseEnter在控件移动后不会触发

当鼠标input时，我想为PictureBox的BackColor属性着色。

当MouseEnter事件触发时，我将BackColor变成黄色，并在MouseLeave重置为透明。

然后，当我点击一个PictureBox ，我改变了它的位置，所以我也有一个Move事件，它重置它透明。

问题是，一旦我移动它，我需要用鼠标两次inputPictureBox来触发MouseEnter事件！

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这是一个非常graphics化的问题，所以我上传了一个小video ，告诉你发生了什么，它肯定会比我更好地解释我的问题。

我试过另一种方式，改变颜色不是在MouseEnter而是在MouseHover 。 在这种情况下，它运行良好，除了在发生Move事件之前有500毫秒的延迟，这显然不是我想要的。

我现在没有可行的解决scheme。

对于代码，这是非常简单的，现在我有：

 private void pictureBoxMouseUp(object sender, MouseEventArgs e) {    // I move the PictureBox here } private void pictureBoxMove(object sender, EventArgs e) {    (sender as PictureBox).BackColor = Color.Transparent; } private void pictureBoxMouseEnter(object sender, MouseEventArgs e) {    (sender as PictureBox).BackColor = Color.LightYellow; } private void pictureBoxMouseLeave(object sender, MouseEventArgs e) {    (sender as PictureBox).BackColor = Color.Transparent; } 

在Designer.cs中，每个PictureBox的事件都是这样的：

 this.pictureBox2.MouseDown += new System.Windows.Forms.MouseEventHandler(this.pictureBoxMouseDown); this.pictureBox2.MouseEnter += new System.EventHandler(this.pictureBoxMouseEnter); this.pictureBox2.MouseLeave += new System.EventHandler(this.pictureBoxMouseLeave); this.pictureBox2.MouseUp += new System.Windows.Forms.MouseEventHandler(this.pictureBoxMouseUp); this.pictureBox2.Move += new System.EventHandler(this.pictureBoxMove); 

编辑：要回答我的问题，这是我现在使用的代码:(评论是法语）

 using System; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Diagnostics; using System.Data; using System.Linq; using System.Text; using System.Windows.Forms; using EmoTEDTherapeute; namespace ControlSceneImage { public class SceneImage : PictureBox { public static readonly int defaultWidth = 100; public static readonly int defaultHeight = 100; static readonly int activePbPosY; // Position en Y des scènes actives static readonly Dictionary<string, Point> scenesPos = null; // Invariant, stocke la position initiale des PictureBox static readonly List<Point>[] activeScenesPos = null; // Invariant, stocke les positions des PictureBox en fonction du nombre de scènes actives static List<SceneImage> activeScenes = null; const int maxActiveScenes = 5; const int ecart = 80; const int decalage = 15; const int panelScenesWidth = 909; const int panelScenesHeight = 154; const int panelScenesLocationX = 35; const int panelScenesLocationY = 36; bool isActive; static SceneImage() { // Constructeur initialisant tous les membres statiques, n'est appelé qu'une seule fois, avant tout le reste activePbPosY = (panelScenesLocationY + panelScenesHeight - (int)(0.6 * defaultHeight)) / 2; scenesPos = new Dictionary<string, Point>(); activeScenesPos = new List<Point>[maxActiveScenes]; for (int i = 0; i < maxActiveScenes; i++) { activeScenesPos[i] = CalcActiveScenesPos(i+1); } activeScenes = new List<SceneImage>(); } public SceneImage() { MouseEnter += new EventHandler(OnMouseEnter); MouseDown += new MouseEventHandler(OnMouseDown); MouseUp += new MouseEventHandler(OnMouseUp); MouseLeave += new EventHandler(OnMouseLeave); BorderStyle = BorderStyle.FixedSingle; Size = new Size(defaultWidth, defaultHeight); SizeMode = PictureBoxSizeMode.Zoom; isActive = false; } private static List<Point> CalcActiveScenesPos(int nbActiveScenes) { List<Point> ret = new List<Point>(); for (int i = 0; i < nbActiveScenes; i++) { ret.Add(new Point((panelScenesLocationX + panelScenesWidth + ecart) / 2 + (int)((ecart + defaultWidth) * (i - nbActiveScenes / 2.0)) + decalage, activePbPosY)); } return ret; } private void UpdateScenesPos() { for(int i = 0; i < activeScenes.Count; i++) { activeScenes[i].Location = activeScenesPos[activeScenes.Count - 1][i]; } } private void OnMouseEnter(object sender, EventArgs e) { BackColor = Color.LightYellow; Cursor = Cursors.Hand; } private void OnMouseDown(object sender, MouseEventArgs e) { BorderStyle = BorderStyle.Fixed3D; } private void OnMouseUp(object sender, MouseEventArgs e) { if (!scenesPos.ContainsKey(Name)) { // Si ce n'est pas déjà fait, on stocke la position initiale de notre PictureBox scenesPos.Add(Name, Location); // Et on crée un Panel vide sous elle Panel panel = new Panel(); panel.Location = Location; panel.Size = Size; panel.BorderStyle = BorderStyle.Fixed3D; // On ajoute notre panel à notre form Form1.AddInSeance(panel); } if (!isActive) { activeScenes.Add(this); } else { Location = scenesPos[Name]; activeScenes.Remove(this); } isActive = !isActive; UpdateScenesPos(); } private void OnMouseLeave(object sender, EventArgs e) { BorderStyle = BorderStyle.FixedSingle; BackColor = Color.Transparent; } } } 

我使用和以前一样的方法，并且由于一个未知的原因，现在它可以工作。 感谢大家帮助我:)

 private const int WM_MOUSELEAVE = 0x02A3; [DllImport("user32.dll")] private static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam); private void pictureBoxMouseUp(object sender, MouseEventArgs e) { // move the PictureBox... SendMessage(((PictureBox)sender).Handle, WM_MOUSELEAVE, IntPtr.Zero, IntPtr.Zero); }