C#自写了控件去拖动窗体怎么实现不了，麻烦帮忙看下

老狗丶

代码如下，不能实现拖动panel而拖动整个窗体移动，麻烦帮忙看下哪儿有问题

[C#] 纯文本查看 复制代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace UI_CreatingADrogControlInWinformApp
{
    class DragControl:Component
    {
        private Control handleControl;
        public Control SelectControl
        {
            get
            {
                return this.handleControl;
            }
            set
            {
                this.handleControl = value;
                this.handleControl.MouseDown += new MouseEventHandler(this.DragForm_MouseDown);
            }
        }

        [DllImport("user32.dll")]
        public static extern int SendMessage(IntPtr a, int msg, int wParam, int lParam);
        [DllImport("user32.dll")]
        public static extern bool ReleaseCapture();

        private void DragForm_MouseDown(object sender, MouseEventArgs e)
        {
            bool flag = e.Button == MouseButtons.Left;
            if (flag)
            {
                DragControl.ReleaseCapture();
                DragControl.SendMessage(this.SelectControl.FindForm().Handle, 162, 2, 0);
            }
        }
    }
}

辉夜年华

把panel绝对布局后试试

老司车开机

DragControl.SendMessage(this.SelectControl.FindForm().Handle, 274,61458, 0);

老狗丶

老司车开机 发表于 2020-7-1 08:56
DragControl.SendMessage(this.SelectControl.FindForm().Handle, 274,61458, 0);

多谢大佬，可以，膜拜