动态生成的控件 怎么实现拖放 winform 大侠们帮一下。在线等

Question

我自动生成2个label，label1是有顺序的，label在前，label2在后。然后怎么实现这两个控件的拖放 可以互换位置 说详细点 谢谢了。在线等

Answer 1

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;namespace Demo4U
{
    public partial class Form1 : Form
    {
        bool IsMouseDown = false;
        public Form1()
        {
            InitializeComponent();
        }        private void Form1_Load(object sender, EventArgs e)
        {
            Label lb1 = new Label();
            lb1.Left = 50;
            lb1.Top = 50;
            lb1.Text = "1111111";
            lb1.AutoSize = true;
            lb1.MouseDown += new MouseEventHandler(lb1_MouseDown);
            lb1.MouseUp += new MouseEventHandler(lb1_MouseUp);
            lb1.MouseMove += new MouseEventHandler(lb1_MouseMove);
            this.Controls.Add(lb1);            Label lb2 = new Label();
            lb2.Left = 150;
            lb2.Top = 50;
            lb2.Text = "2222222";
            lb2.AutoSize = true;
            lb2.MouseDown += new MouseEventHandler(lb1_MouseDown);
            lb2.MouseUp += new MouseEventHandler(lb1_MouseUp);
            lb2.MouseMove += new MouseEventHandler(lb1_MouseMove);
            this.Controls.Add(lb2);
        }        void lb1_MouseMove(object sender, MouseEventArgs e)
        {
            if (IsMouseDown)
            {
                ((Label)sender).Left += e.X;
                ((Label)sender).Top += e.Y;
            }
        }        void lb1_MouseUp(object sender, MouseEventArgs e)
        {
            IsMouseDown = false;
        }        void lb1_MouseDown(object sender, MouseEventArgs e)
        {
            IsMouseDown = true;
        }
    }
}记得给分啊 ,楼主

Answer 2

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace WindowsApplication3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        [DllImport("user32.dll", EntryPoint = "SendMessage")]
        public static extern int SendMessage(int hWnd, int wMsg, int wParam, int lParam);
        [DllImport("user32.dll", EntryPoint = "ReleaseCapture")]
        public static extern int ReleaseCapture();
        public const int WM_SysCommand = 0x0112;
        public const int SC_MOVE = 0xF012;
        private void Form1_Load(object sender, EventArgs e)
        {
            Label lb = new Label();
            lb.Cursor = Cursors.Hand;
            lb.Text = "可以拖放";
            lb.Location = new Point(100, 100);
            lb.MouseDown += new MouseEventHandler(lb_MouseDown);
            this.Controls.Add(lb);
            
        }        void lb_MouseDown(object sender, MouseEventArgs e)
        {
            ReleaseCapture();
            SendMessage(((Control)sender).Handle.ToInt32(), WM_SysCommand, SC_MOVE, 0);        }
    }
}

Answer 3

我的label是自动生成的。可以加我QQ 332891525详细聊。可以再给加分！

Answer 4

你要求的是表单设计器吧
http://www.cnblogs.com/michael-zhang/archive/2008/10/07/655267.html

Answer 5

Point myPoint;
        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            myPoint = new Point(-e.X, -e.Y);
        }        private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                Point myPosition = Control.MousePosition;
                myPosition.Offset(myPoint.X, myPoint.Y);
                this.DesktopLocation = myPosition;
            }
        }

Answer 6

public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent(); //
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
} [DllImport("user32.dll", EntryPoint = "SendMessage")]
public static extern int SendMessage(int hWnd, int wMsg, int wParam, int lParam);
[DllImport("user32.dll", EntryPoint = "ReleaseCapture")]
public static extern int ReleaseCapture();
public const int WM_SysCommand = 0x0112;
public const int SC_MOVE = 0xF012;//动态生成label控件
private void button1_Click(object sender, System.EventArgs e)
{
try
{
Label label1 = new Label();
label1.Location = new System.Drawing.Point(20, 20);
label1.Name = "label1";
label1.Text = "label1";
label1.Size = new System.Drawing.Size(100, 21);
this.Controls.Add(label1); 
label1.MouseDown += new System.Windows.Forms.MouseEventHandler(label1_MouseDown);//添加label的mousedown事件
}
catch(Exception ex)
{
throw ex;
}
}void label1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
try
{
ReleaseCapture();
SendMessage(((Control)sender).Handle.ToInt32(), WM_SysCommand, SC_MOVE, 0); }
catch(Exception ex)
{
throw ex;
}
}

Answer 7

namespace Demo4U 
{ 
    public partial class Form1 : Form 
    { 
        bool IsMouseDown = false; 
        public Form1() 
        { 
            InitializeComponent(); 
        }         private void Form1_Load(object sender, EventArgs e) 
        { 
            Label lb1 = new Label(); 
            lb1.Left = 50; 
            lb1.Top = 50; 
            lb1.Text = "1111111"; 
            lb1.AutoSize = true; 
            lb1.MouseDown += new MouseEventHandler(lb1_MouseDown); 
            lb1.MouseUp += new MouseEventHandler(lb1_MouseUp); 
            lb1.MouseMove += new MouseEventHandler(lb1_MouseMove); 
            this.Controls.Add(lb1); 
            Label lb2 = new Label(); 
            lb2.Left = 150; 
            lb2.Top = 50; 
            lb2.Text = "2222222"; 
            lb2.AutoSize = true; 
            lb2.MouseDown += new MouseEventHandler(lb1_MouseDown); 
            lb2.MouseUp += new MouseEventHandler(lb1_MouseUp); 
            lb2.MouseMove += new MouseEventHandler(lb1_MouseMove); 
            this.Controls.Add(lb2); 
        }         void lb1_MouseMove(object sender, MouseEventArgs e) 
        { 
            if (IsMouseDown) 
            { 
                ((Label)sender).Left += e.X; 
                ((Label)sender).Top += e.Y; 
            } 
        }         void lb1_MouseUp(object sender, MouseEventArgs e) 
        { 
            IsMouseDown = false; 
        }         void lb1_MouseDown(object sender, MouseEventArgs e) 
        { 
            IsMouseDown = true; 
        } 
    } 
} 

Answer 8

这个方法，当我同时将多个Label的MouseDown绑定到同一个方法时，先移动第一个Label没有问题，移动另一个Label时会导致第一个Label移动。
不知道是什么原因

Answer 9

回复楼上的void label1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            try
            {
                ReleaseCapture();
                SendMessage(((Control)sender).Handle.ToInt32(), WM_SysCommand, SC_MOVE, 0);            }
            catch(Exception ex)
            {
                throw ex;
            }
        }
//你把每一个label都添加label1.MouseDown += new System.Windows.Forms.MouseEventHandler(label1_MouseDown);，记得把label1替换掉。
//在void label1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)函数中也要替换label1

Answer 10

解决了，还要谢谢楼上，原因是Label.AutoSize不能为true，不知道为什么会这样

Answer 11

不知道楼主想要什么,这个拷贝=>编译=>运行就看见效果了,完全满足楼主的要求,还觉得不行,难道是俺爷们对汉字的理解不到位,无法理解楼主的意思using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Text; 
using System.Windows.Forms; namespace Demo4U 
{ 
    public partial class Form1 : Form 
    { 
        bool IsMouseDown = false; 
        public Form1() 
        { 
            InitializeComponent(); 
        }         private void Form1_Load(object sender, EventArgs e) 
        { 
            Label lb1 = new Label(); 
            lb1.Left = 50; 
            lb1.Top = 50; 
            lb1.Text = "1111111"; 
            lb1.AutoSize = true; 
            lb1.MouseDown += new MouseEventHandler(lb1_MouseDown); 
            lb1.MouseUp += new MouseEventHandler(lb1_MouseUp); 
            lb1.MouseMove += new MouseEventHandler(lb1_MouseMove); 
            this.Controls.Add(lb1); 
            Label lb2 = new Label(); 
            lb2.Left = 150; 
            lb2.Top = 50; 
            lb2.Text = "2222222"; 
            lb2.AutoSize = true; 
            lb2.MouseDown += new MouseEventHandler(lb1_MouseDown); 
            lb2.MouseUp += new MouseEventHandler(lb1_MouseUp); 
            lb2.MouseMove += new MouseEventHandler(lb1_MouseMove); 
            this.Controls.Add(lb2); 
        }         void lb1_MouseMove(object sender, MouseEventArgs e) 
        { 
            if (IsMouseDown) 
            { 
                ((Label)sender).Left += e.X; 
                ((Label)sender).Top += e.Y; 
            } 
        }         void lb1_MouseUp(object sender, MouseEventArgs e) 
        { 
            IsMouseDown = false; 
        }         void lb1_MouseDown(object sender, MouseEventArgs e) 
        { 
            IsMouseDown = true; 
        } 
    } 
}