【提问】为什么自定义控件中重载的事件无法响应，请看代码
这个是自定义控件中的代码。
public partial class PicListEx : UserControl { private Size size = new Size(100, 100); private Thread LoadPictureThread = null; public PicListEx() { InitializeComponent(); lViewPic.View = View.LargeIcon; } /// <summary> /// 加载图片 /// </summary> /// <param name="filePaths">包含图片路径的数组</param> public void loadPicFile(List<string> filePaths) { if (LoadPictureThread == null || !LoadPictureThread.IsAlive) { LoadPictureThread = new Thread(new ParameterizedThreadStart(LoadPictureFunc)); LoadPictureThread.IsBackground = true; LoadPictureThread.Start(filePaths); } else { return; } } private void LoadPictureFunc(object obj) { List<string> filePaths = null; if (obj is List<string>) { filePaths = obj as List<string>; } else { return; } try { Invoke(new MethodInvoker(new Action(delegate() { lViewPic.Items.Clear(); lViewPic.BeginUpdate(); }))); ImageList Ilist = new ImageList();//与ListView关联的大图标列表 Ilist.ImageSize = size;//设置大小 Invoke(new MethodInvoker(new Action(delegate() { lViewPic.LargeImageList = Ilist; //关联 }))); foreach (string filePath in filePaths) { if (File.Exists(filePath)) { string fileName = Path.GetFileNameWithoutExtension(filePath); Image img = ResizeImage(filePath); Invoke(new MethodInvoker(new Action(delegate() { Ilist.Images.Add(filePath, img); }))); ListViewItem lvitem = new ListViewItem(fileName); lvitem.Tag = filePath; lvitem.ImageKey = filePath; Invoke(new MethodInvoker(new Action(delegate() { lViewPic.Items.Add(lvitem); }))); img.Dispose(); } } Invoke(new MethodInvoker(new Action(delegate() { lViewPic.EndUpdate(); lViewPic.Refresh(); }))); } catch (Exception ex) { MessageBox.Show(this, ex.Message); } finally { Invoke(new MethodInvoker(new Action(delegate() { }))); } } private void lViewPic_Click(object sender, EventArgs e) { MessageBox.Show("自定义控件内_单击事件.");//**能够响应 } private void lViewPic_MouseClick(object sender, MouseEventArgs e) { MessageBox.Show("自定义控件内_鼠标点击事件.");//**能够响应 } protected override void OnClick(EventArgs e) { MessageBox.Show("重载的自定义控件单击事件.");//**无法响应 base.OnClick(e); } protected override void OnMouseEnter(EventArgs e) { MessageBox.Show("重载的自定义控件鼠标进入控件事件.");//**无法响应 base.OnMouseEnter(e); } } public partial class FormMain : Form { public FormMain() { InitializeComponent(); picListExLeft.Click += picListExLeft_Click; } string filePath = ""; private void tsBtn_OpenForld_Click(object sender, EventArgs e) { string folderPath = ""; FolderBrowserDialog folderDlg = new FolderBrowserDialog(); if (folderDlg.ShowDialog() == DialogResult.OK) { folderPath = folderDlg.SelectedPath; } List<string> listfile = new List<string>(); if (folderPath != "" && Directory.Exists(folderPath)) { DirectoryInfo dirInfo = new DirectoryInfo(folderPath); foreach (FileInfo fileinfo in dirInfo.GetFiles()) { if (fileinfo.Extension.ToUpper() == ".JPG") listfile.Add(fileinfo.FullName); } } folderDlg.Dispose(); folderDlg = null; if (listfile.Count > 0) { picListExLeft.loadPicFile(listfile); } } private void tsBtn_OpenPic_Click(object sender, EventArgs e) { OpenFileDialog openFd = new OpenFileDialog(); if (openFd.ShowDialog() == DialogResult.OK) { filePath = openFd.FileName; } openFd.Dispose(); openFd = null; if (filePath != "") { List<string> listTem = new List<string>(); listTem.Add(filePath); picListExLeft.loadPicFile(listTem); } } private void picListExLeft_Click(object sender, EventArgs e) { ListViewItem item = picListExLeft.GetListViewSelectedItem; if (item != null && (item.Tag as string).Trim() != "") { MessageBox.Show((item.Tag as string).Trim()); } } private void picListExLeft_MouseClick(object sender, MouseEventArgs e) { MessageBox.Show("鼠标单击");////**无法响应 } private void picListExLeft_Load(object sender, EventArgs e) { MessageBox.Show("LOAD"); } private void picListExLeft_MouseDoubleClick(object sender, MouseEventArgs e) { MessageBox.Show("双击");//**无法响应 } private void picListExLeft_MouseEnter(object sender, EventArgs e) { MessageBox.Show("鼠标进入");//**无法响应 } }
private void lViewPic_MouseClick(object sender, MouseEventArgs e) { MessageBox.Show("自定义控件内_鼠标点击事件.");//**能够响应 }
[解决办法]
因为你点击的操作都在图片上，而不是在控件上
[解决办法]
点的是图片，不是自定义控件本身，这样处理下，间接触发点击事件，外面就能获取到
private void lViewPic_Click(object sender, EventArgs e){ this.OnClick(e);}private void lViewPic_MouseClick(object sender, MouseEventArgs e){ this.OnMouseClick(e);}
[解决办法]
定义两个共用的事件方法，把自定义控件上所有子控件的 Click 和 MouseClick 事件都指向这两个方法
private void this_Click(object sender, EventArgs e){ this.OnClick(e);}private void this_MouseClick(object sender, MouseEventArgs e){ this.OnMouseClick(e);}
[解决办法]
把 picListExLeft_MouseClick 这类方法都删掉，这三个方法加到用户控件代码中
private void BindEvent(Control.ControlCollection ccle){ foreach (Control item in ccle) { item.Click += this.this_Click; item.MouseClick += this.this_MouseClick; this.BindEvent(item.Controls); }}private void this_Click(object sender, EventArgs e){ this.OnClick(e);}private void this_MouseClick(object sender, MouseEventArgs e){ this.OnMouseClick(e);}
[解决办法]
你看看这个，或许你也是这个原因：
http://msdn.microsoft.com/zh-cn/library/ms171542.aspx
ListView 控件
注意
只有当用户单击 ListView 控件中的项时，才会发生下面详细说明的事件行为。 单击控件上的任何其他位置都不会引发任何事件。 除下面所描述的事件外，还有 BeforeLabelEdit 和 AfterLabelEdit 事件，如果要对 ListView 控件进行验证，则您可能会用到这两个事件。
单击左键：Click、MouseClick
单击右键：Click、MouseClick
双击左键：Click、MouseClick；DoubleClick、MouseDoubleClick
双击右键：Click、MouseClick；DoubleClick、MouseDoubleClick