问个关于托拽的问题

[anycall2004]

我有2个winform 想实现跨form托拽
请问该如何实现呢？ 最好有例子
谢谢

[lateknow]

在第一个form中的要被拖拽的控件的MouseDown事件时,执行this.DoDragDrop(要拖拽的控件或者其它数据, DragDropEffects.Move);
在第二个form的接受控件的DragDrop事件里 object o = e.Data.GetData(typeof(对象));o就是拖曳的东西,你爱怎么处理就是你的事了.

[wangping_li]

使用hbxtlhx的代码

Forms1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace dragControl
{
    public partial class Form1 : Form
    {
        private System.Windows.Forms.Button button1;

        public Form1()
        {
            InitializeComponent();
        }
        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            this.button1 = new System.Windows.Forms.Button();
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(116, 65);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 0;
            this.button1.Text = "button1";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.button1_MouseDown);

            this.Controls.Add(this.button1);
        }
        private void button1_MouseDown(object sender, MouseEventArgs e)
        {
            this.button1.DoDragDrop(sender, DragDropEffects.Move);
        }
        protected override void OnDoubleClick(EventArgs e)
        {
            base.OnDoubleClick(e);
            Form2 frm = new Form2();
            frm.Show();
        }
    }
}

Forms2.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace dragControl
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }
        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            this.AllowDrop = true;
            this.DragDrop += new System.Windows.Forms.DragEventHandler(this.Form2_DragDrop);
            this.DragOver += new System.Windows.Forms.DragEventHandler(this.Form2_DragOver);
        }
        private void Form2_DragOver(object sender, DragEventArgs e)
        {
            if (e.AllowedEffect == DragDropEffects.Move)
            {
                e.Effect = DragDropEffects.Move;
            }
        }

        private void Form2_DragDrop(object sender, DragEventArgs e)
        {
            Button btn = e.Data.GetData("System.Windows.Forms.Button") as Button;
            if (btn != null)
            {
                if (btn.Parent != null)
                {
                    btn.Parent.Controls.Remove(btn);
                    btn.Location = this.PointToClient(new Point(e.X, e.Y));
                    this.Controls.Add(btn);
                }
            }
        }
    }
}

[cppfaq]

[Quote=引用 4 楼 wangping_li 的回复:]
使用hbxtlhx的代码

Forms1.cs

C# code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace dragControl
{
public partial class Form1 : Form
{
private System.Windows.Forms.Button button1;

public Form1()
{
Init…
[/Quote]

Should work

[pztx1992]

在控件的鼠标点击事件中 复制该对象
然后再另外一个窗体的点击事件中转换加载该对象。

[abcfy2]

窗体有个属性就是是否启用拖拽，启用那个属性，然后在事件中加入拖拽事件