在 C# 中通过鼠标拖动来移动控件
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Moving a control by dragging it with the mouse in C#
提问by Paul Daniel Ghiran
I'm trying to move the control named pictureBox1 by dragging it around. The problem is, when it moves, it keeps moving from a location to another location around the mouse, but it does follow it... This is my code. and I would really appreciate it if you could help me
我试图通过拖动来移动名为 pictureBox1 的控件。问题是，当它移动时，它会不断从鼠标周围的一个位置移动到另一个位置，但它确实跟随它......这是我的代码。如果你能帮助我，我将不胜感激
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
bool selected = false;
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
selected = true;
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
if (selected == true)
{
pictureBox1.Location = e.Location;
}
}
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
selected = false;
}
}
采纳答案by astef
All you need:
一切你需要的：
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private Point MouseDownLocation;
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
MouseDownLocation = e.Location;
}
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
pictureBox1.Left = e.X + pictureBox1.Left - MouseDownLocation.X;
pictureBox1.Top = e.Y + pictureBox1.Top - MouseDownLocation.Y;
}
}
}
回答by Pavi Muthu
try this to move pictureBox control at runtime using mouse
尝试使用鼠标在运行时移动图片框控件
private void pictureBox7_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
xPos = e.X;
yPos = e.Y;
}
}
private void pictureBox7_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
PictureBox p = sender as PictureBox;
if (p != null)
{
if (e.Button == MouseButtons.Left)
{
p.Top += (e.Y - yPos);
p.Left += (e.X - xPos);
}
}
}
回答by Pawe? Wojda
You can also use the extension:
您还可以使用扩展名：
public static class CmponentsExtensions
{
//Management of mouse drag and drop
#region Menu and Mouse
private static bool mouseDown;
private static Point lastLocation;
/// <summary>
/// To enable control to be moved around with mouse
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="control"></param>
public static void moveItselfWithMouse<T>(this T control) where T: Control
{
control.MouseDown += (o, e)=> { mouseDown = true; lastLocation = e.Location; };
control.MouseMove += (o, e) =>
{
if (mouseDown)
{
control.Location = new Point((control.Location.X - lastLocation.X) + e.X, (control.Location.Y - lastLocation.Y) + e.Y);
control.Update();
}
};
control.MouseUp += (o, e) => { mouseDown = false; } ;
}
public static void moveOtherWithMouse<T>(this T control, Control movedObject) where T : Control
{
control.MouseDown += (o, e) => { mouseDown = true; lastLocation = e.Location; };
control.MouseMove += (o, e) =>
{
if (mouseDown)
{
movedObject.Location = new Point((movedObject.Location.X - lastLocation.X) + e.X, (movedObject.Location.Y - lastLocation.Y) + e.Y);
movedObject.Update();
}
};
control.MouseUp += (o, e) => { mouseDown = false; };
}
#endregion
}
Then you need to use it with some control:
然后你需要使用它进行一些控制：
In this case pictureBox1 moved the whole Form
在这种情况下，pictureBox1 移动了整个 Form
pictureBox1.moveOtherWithMouse(this);
In this case you move only pictureBox:
在这种情况下，您只移动图片框：
pictureBox1.moveItselfWithMouse();
