如何在C#中鼠标单击同一位置时添加标签？

发布于 2024-10-03 16:49:20 字数 230 浏览 9 评论 0原文

我的程序有一个图片框，我希望通过单击鼠标或选择 ContextMenuStrip，使某些内容出现在单击的同一位置。

如图所示，我想在特定的点击日期区域添加某种注释（可能添加用户控件）

我该怎么做？我如何发送点击坐标（x，y）并使某些内容出现在这些相同的坐标处？

谢谢！

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小巷里的女流氓 2024-10-10 16:49:20

我将创建一个类，该类将提供菜单项并捕获 x,y 坐标，以便在单击该项目时准备好它们。或者您可以在匿名委托中捕获这些坐标。

像这样的东西：

public Form1()
{
    InitializeComponent();
    MouseClick += new MouseEventHandler(Form1_MouseClick);
}

private void Form1_MouseClick (object sender, MouseEventArgs e)
{
    if (e.Button == MouseButtons.Right)
    {
        ContextMenuStrip ctxMenu = new ContextMenuStrip();

        // following line creates an anonymous delegate
        // and captures the "e" MouseEventArgs from 
        // this method
        ctxMenu.Items.Add(new ToolStripMenuItem(
           "Insert info", null, (s, args) => InsertInfoPoint(e.Location)));

        ctxMenu.Show(this, e.Location);
    }
}

private void InsertInfoPoint(Point location)
{
    // insert actual "info point"
    Label lbl = new Label()
    {
        Text = "new label",
        BorderStyle = BorderStyle.FixedSingle,
        Left = location.X, Top = location.Y
    };
    this.Controls.Add(lbl);
}

I would create a class which would provide menu items and capture x,y coordinates to have them ready when the item is clicked. Or you can capture these coordinates in an anonymous delegate.

Something like this:

public Form1()
{
    InitializeComponent();
    MouseClick += new MouseEventHandler(Form1_MouseClick);
}

private void Form1_MouseClick (object sender, MouseEventArgs e)
{
    if (e.Button == MouseButtons.Right)
    {
        ContextMenuStrip ctxMenu = new ContextMenuStrip();

        // following line creates an anonymous delegate
        // and captures the "e" MouseEventArgs from 
        // this method
        ctxMenu.Items.Add(new ToolStripMenuItem(
           "Insert info", null, (s, args) => InsertInfoPoint(e.Location)));

        ctxMenu.Show(this, e.Location);
    }
}

private void InsertInfoPoint(Point location)
{
    // insert actual "info point"
    Label lbl = new Label()
    {
        Text = "new label",
        BorderStyle = BorderStyle.FixedSingle,
        Left = location.X, Top = location.Y
    };
    this.Controls.Add(lbl);
}

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你另情深 2024-10-10 16:49:20

满足您要求的示例代码，在下面的代码中，我添加了鼠标单击时的按钮控件。您可以根据需要修改代码。

    int xValue=0, yValue=0;
    private void Form1_MouseClick(object sender, MouseEventArgs e)
    {
        xValue = e.X;
        yValue = e.Y;
        Button btn = new Button();
        btn.Name = "Sample Button";
        this.Controls.Add(btn);
        btn.Location = new Point(xValue, yValue);
    }

An sample code for your requirement, In my below code i am adding button control on mouse click. You can modify the code as per ur need.

    int xValue=0, yValue=0;
    private void Form1_MouseClick(object sender, MouseEventArgs e)
    {
        xValue = e.X;
        yValue = e.Y;
        Button btn = new Button();
        btn.Name = "Sample Button";
        this.Controls.Add(btn);
        btn.Location = new Point(xValue, yValue);
    }

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