如何在运行时移动新的（自定义）按钮？

Question

I have a problem with my winforms C# project.

I want to move a new (custom) button around the form (at run time). How can I do that?

    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;
        }

I use the code above to create the new button and I am trying to move it around the form.

If I code for just 1 button I am able to move it but, I want to be able to do this for more buttons as well.

Answer 1

Try this

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;
        }
    }

Answer 2

I've come across this thread while doing something similar.
Even though the thread is quite old; I'm sharing the way I've achieved this.

Notes: Unlike the operator question above; in the example bellow; I'm not using a Button[] (array) with 1000 buttons; (but this can be easily changed).

In the example bellow I have: A Form with 1 Button on it. When this button is clicked; it will create a new (Custom) Button (hence; having two button click events in the code simply for the test purpose).

Bellow you can find: A way to generate the button; and so how to drag it around the form.

/* 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.

Hope this helps people out achieving this goal.