1

我的 winforms C# 项目有问题。

我想在表单周围移动一个新的（自定义）按钮（在运行时）。我怎样才能做到这一点？

    Button[] buttons = new Button[1000];
        int counter = 0;
        Button myText = new Button();
private void button2_Click(object sender, EventArgs e)
        {
                Button myText = new Button();
                myText.Tag = counter;
                myText.Location = new Point(x2,y2);
                myText.Text = Convert.ToString(textBox3.Text);
                this.Controls.Add(myText);
                myText.MouseMove += new MouseEventHandler(myText_MouseMove);
                myText.MouseDown += new MouseEventHandler(myText_MouseDown);
                buttons[counter] = myText;
                counter++;
        }
 public void myText_MouseMove(object sender, MouseEventArgs e)
        {
            int s = e.GetHashCode();
            int check = 0;
            for (int i = 0; i < counter; i++)
            {
                if (buttons[i].GetHashCode() == s)
                    check = i;
            }
            if (e.Button == MouseButtons.Left)
            {
                buttons[check].Left += e.X - move.X;
                buttons[check].Top += e.Y - move.Y;
            }
        }
        void myText_MouseDown(object sender, MouseEventArgs e)
        {
            move = e.Location;
        }

我使用上面的代码创建新按钮，并尝试在表单中移动它。

如果我只为 1 个按钮编写代码，我可以移动它，但是我也希望能够为更多按钮执行此操作。

4

2 回答 2

2

试试这个

public void myText_MouseMove(object sender, MouseEventArgs e)
    {
        Button button = (Button)sender;
        if (e.Button == MouseButtons.Left)
        {
            button .Left += e.X - move.X;
            button .Top += e.Y - move.Y;
        }
    }
于 2012-04-21T13:34:13.607 回答
0

我在做类似的事情时遇到了这个线程。
即使线程很旧；我正在分享我实现这一目标的方式。

注： 与上面的操作员问题不同；在下面的例子中；我没有使用带有 1000 个按钮的 Button[] （数组）；（但这很容易改变）。

在下面的示例中，我有：一个带有 1 个按钮的表单。单击此按钮时；它将创建一个新的（自定义）按钮（因此；在代码中有两个按钮单击事件只是为了测试目的）。

您可以在下面找到：一种生成按钮的方法；以及如何在表单周围拖动它。

/* Variables */

// Used to Store the Mouse Location on the Screen when Button is Clicked
private Point mouseDownLocation;

// Used to know if the Button can be Moved.
private bool isMoveable = false;

// Used to prevent clicking the button when being dragged
private bool clickEnabled = true;


/// <summary> Occurrs when the visible button on the Form is clicked. </summary>
private void Button_Click(object sender, EventArgs e)
{
    // Create a variable to set the Size of the new Button.
    Size size = new Size(100, 100);

    // Create the Button. Specifying the Button Text and its Size.
    CreateButton("Button Text", size);
}

/* Custom Button : Create & Configure the Button */
private void CreateButton(string btnText, Size btnSize)
{
    // Create the Button instance:
    Button btn = new Button();

    // Custom Button Style Configuration Code.
    // i.e: FlatStyle; FlatAppearance; BackColor; ForeColor; Text; Size; Location; etc...
    btn.FlatStyle = FlatStyle.Standard;
    btn.FlatAppearance.BorderColor = Color.White;
    btn.BackColor = Color.Purple;
    btn.ForeColor = Color.White;
    btn.Text = btnText;
    btn.Size = btnSize;
    btn.Location = new Point(100, 100);

    // Custom Button Event.
    btn.Click += new EventHandler(CustomButton_Click);
    btn.MouseDown += new MouseEventHandler(CustomButton_MouseDown);
    btn.MouseMove += new MouseEventHandler(CustomButton_MouseMove);
    btn.MouseUp += new MouseEventHandler(CustomButton_MouseUp);

    // Add Button to Control Collection.
    Controls.Add(btn);

    // Show Button.
    btn.Show();
}


/* Custom Button Events */

/// <summary> Occurrs whenever the Custom Button is Clicked </summary>
private void CustomButton_Click(object sender, EventArgs e)
{
    if (clickEnabled)
    {
        // Note: The "for" loop bellow lets you get the current button; so you can drag it.

        Button btn = (Button)sender;

        // Iterate over the Form Controls
        for (int i = 0; i < Controls.Count; i++)
        {
            // If the Button Clicked Corresponds to a Found Index in Control Collection...
            if (i == Controls.IndexOf(btn))
            {
                // Perform Corresponding Button Action.
                MessageBox.Show(btn.Name + " Clicked!");
            }
        }
    }
}

/// <summary> Occurrs whenever Left Mouse Button Clicks the Button and is Kept Down. </summary>
private void CustomButton_MouseDown(object sender, MouseEventArgs e)
{
    // Check if Left Mouse Button is Clicked.
    if (e.Button == MouseButtons.Left)
    {
        // Set mouseDownLocation (Point) variable, according to the current mouse location (X and Y).
        mouseDownLocation = e.Location;

        // Enable the hability to move the Button.
        isMoveable = true;
    }
}

/// <summary> Occurrs whenever Left Mouse Button is Down and Mouse is Moving the Button. </summary>
private void CustomButton_MouseMove(object sender, MouseEventArgs e)
{
    Button btn = (Button)sender;

    // If the hability to move the button is "true" and the mouse button used to drag the button is the left mouse button:
    if (isMoveable)
    {
        if (e.Button == MouseButtons.Left)
        {
            // Set the Button location X and Y...
            btn.Left = e.X + btn.Left - mouseDownLocation.X;
            btn.Top = e.Y + btn.Top - mouseDownLocation.Y;
        }
    }

    // Disable Click hability (See: Note at the end of this post).
    clickEnabled = false;
}

/// <summary> Occurrs whenever Left Mouse Button is not longer being hold down (Left Mouse Button is Up). </summary>
private void CustomButton_MouseUp(object sender, MouseEventArgs e)
{
    // Disables the hability to move the button
    isMoveable = false;
    clickEnabled = true;
}
Note: The Custom Button Click interferes with the MouseDown Event. In a "simple" manner: 
I updated the code by including a boolean value to prevent clicking the button when actually it is being dragged.
Hope this helps you out understanding how to accomplish this feature.

希望这可以帮助人们实现这一目标。

于 2020-01-23T13:34:15.820 回答