WinForm支持拖拽效果

来源：互联网发布：台湾衰落知乎编辑：程序博客网时间：2024/05/16 15:44

using Microsoft.VisualBasic;using System;using System.Collections;using System.Collections.Generic;using System.Data;using System.Diagnostics;public class Form1{    //计数变量，说明输出了第N个Button    private int count = 1;    private void Form1_Load(System.Object sender, System.EventArgs e)    {        this.AllowDrop = true;        //窗体自身支持接受拖拽来的控件    }    private void Button1_MouseDown(System.Object sender, System.Windows.Forms.MouseEventArgs e)    {        //左键的话，标志位为true（表示拖拽开始）        if ((e.Button == System.Windows.Forms.MouseButtons.Left)) {            Button1.DoDragDrop(Button1, DragDropEffects.Copy | DragDropEffects.Move);            //形成拖拽效果，移动+拷贝的组合效果        }    }    private void Form1_DragEnter(System.Object sender, System.Windows.Forms.DragEventArgs e)    {        //当Button被拖拽到WinForm上时候，鼠标效果出现        if ((e.Data.GetDataPresent(typeof(Button)))) {            e.Effect = DragDropEffects.Copy;        }    }    private void Form1_DragDrop(System.Object sender, System.Windows.Forms.DragEventArgs e)    {        //拖放完毕之后，自动生成新控件        Button btn = new Button();        btn.Size = Button1.Size;        btn.Location = this.PointToClient(new Point(e.X, e.Y));        //用这个方法计算出客户端容器界面的X，Y坐标。否则直接使用X，Y是屏幕坐标        this.Controls.Add(btn);        btn.Text = "按钮" + count.ToString();        count = count + 1;    }    public Form1()    {        DragDrop += Form1_DragDrop;        DragEnter += Form1_DragEnter;        Load += Form1_Load;    }}

原文地址：http://www.cnblogs.com/ServiceboyNew/archive/2012/04/29/2476154.html

0 0