C# 按住鼠标左键移动窗体Form的位置,C#拖动窗体通用类

作者:C/S框架网|www.cscode.ne 发布日期:2021/06/01 10:03:52

C# 按住鼠标左键移动窗体Form的位置,C#拖动窗体通用类

C# Code:

private void frmLogin_Load(object sender, EventArgs e)
{
//使用方法：在窗体的Load事件调用
FormDragDrop.Handle(this);

}

//来源:C/S框架网 | www.csframework.com | QQ:23404761

FormDragDrop.cs类：

C# Code:

/// <summary>
/// 拖动鼠标移动窗体Form通用类
/// </summary>
public class FormDragDrop
{
private Point _MouseOffset;
private bool _IsMouseDown = false;
private Form _form;

private FormDragDrop(Form form)
{
_form = form;
}

/// <summary>
/// 使用方法
/// </summary>
/// <param name="form"></param>
public static void Handle(Form form)
{
FormDragDrop F = new FormDragDrop(form);
F.HandleEvents();
}

private void HandleEvents()
{
_form.MouseDown += On_MouseDown;
_form.MouseMove += On_MouseMove;
_form.MouseUp += On_MouseUp;
}

private void On_MouseDown(object sender, MouseEventArgs e)
{
int xOffset;
int yOffset;

if (e.Button == MouseButtons.Left)
{
xOffset = -e.X;
yOffset = -e.Y;
_MouseOffset = new Point(xOffset, yOffset);
_IsMouseDown = true;
}
}

private void On_MouseMove(object sender, MouseEventArgs e)
{
if (_IsMouseDown)
{
Point mousePos = Control.MousePosition;
mousePos.Offset(_MouseOffset.X, _MouseOffset.Y);
_form.Location = mousePos;
}
}

private void On_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
_IsMouseDown = false;
}
}

}

//来源:C/S框架网 | www.csframework.com | QQ:23404761