Question

我使用面板和两个标签的组合制作了一个用户控件。我在用户控件上添加了mouseenter和mouseleave事件。我将用户控件放在表单上。我想在单击控件时打开一个新表单。但默认点击或鼠标点击事件不起作用。我怎么解决这个？

以下是用户控制代码：

static void Main()
       {
            public static Form1 s_mainForm = null;
            try
            {

                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);

                s_formShutdownMsg = new FormMessage();
                s_mainForm = new Form1();
                Application.Run(s_mainForm);
            }
            catch (Exception e)
            {
            }
      }
public static FormMessage s_formShutdownMsg = null; //somewhere in the project

这是用户控制点击事件代码：

public partial class group_control : UserControl
{

    public group_control()
    {
        InitializeComponent(); 
    }

    public void setname(string s)
    {
        namelbl.Text = s;
    }

    public void setno(int n)
    {
        no_acc.Text = n.ToString();
    }

    private void logo_MouseEnter(object sender, EventArgs e)
    {
        logo.BackColor = System.Drawing.Color.Yellow;
        no_acc.Visible = true;
        label1.Visible = true;
        namelbl.Visible = false;
    }

    private void logo_MouseLeave(object sender, EventArgs e)
    {
        logo.BackColor = System.Drawing.Color.Gray;
        no_acc.Visible = false;
        label1.Visible = false;
        namelbl.Visible = true;
    }

    private void logo_Click(object sender, EventArgs e)
    {
        Program.cur_grp = namelbl.Text;
    }

    private void no_acc_Click(object sender, EventArgs e)
    {
        logo_Click(sender, e);
    }

    private void label1_Click(object sender, EventArgs e)
    {
        logo_Click(sender, e);
    }

    private void namelbl_Click(object sender, EventArgs e)
    {
        logo_Click(sender, e);
    }

    private void no_acc_MouseEnter(object sender, EventArgs e)
    {
        logo_MouseEnter(sender, e);
    }

    private void namelbl_MouseEnter(object sender, EventArgs e)
    {
        logo_MouseEnter(sender, e);
    }

    private void label1_MouseEnter(object sender, EventArgs e)
    {
        logo_MouseEnter(sender, e);
    }

    private void no_acc_MouseLeave(object sender, EventArgs e)
    {
        logo_MouseLeave(sender, e);
    }

    private void label1_MouseLeave(object sender, EventArgs e)
    {
        logo_MouseLeave(sender, e);
    }

    private void namelbl_MouseLeave(object sender, EventArgs e)
    {
        logo_MouseLeave(sender, e);
    }
}

Answer 1

如果您点击面板，那么面板将获得鼠标点击事件。如果您希望在用户控件上执行该事件，那么您的面板应该对鼠标单击是透明的。你就是这样做的;

public class ClickTransparentPanel : Panel
{
    protected override void WndProc(ref Message m)
    {
        // To make panel "transparent" 
        // to mouse clicks i.e. Mouse clicks pass through this window
        switch (m.Msg)
        {
            case (int) Win32Constants.WM_NCHITTEST:
                m.Result = new IntPtr((int) Win32Constants.HTTRANSPARENT);
                return;
        }

        base.WndProc(ref m);
    }
}

其中

WM_NCHITTEST = 0x0084,

HTTRANSPARENT = -1

如何让用户控件打开新表单？

1 个答案: