如何在WinForm里创建一个可移动的控件

[liu447862556]

在WinForm里创建一个控件，例如button1，运行程序之后，可以用鼠标在界面上进行拖动，而且，大小可以调整，功能不变。

[meic1985]

学习了～

[isjoe]

运行后可以用鼠标拖动静态文本、按钮、列表框、单选、复选控件的例子，N年前写的。。。
能找到真是个奇迹。。。

//csj...
//

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

namespace Drop
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button button1;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		private bool Mousedown = false;  //鼠标按下为true
		private int CurX = 0,CurY = 0;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.CheckBox checkBox1;
		private System.Windows.Forms.RadioButton radioButton1;
		private System.Windows.Forms.ListBox listBox1;   //保存鼠标按下时鼠标在窗口的坐标

		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
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗体设计器生成的代码
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.button1 = new System.Windows.Forms.Button();
			this.label1 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.checkBox1 = new System.Windows.Forms.CheckBox();
			this.radioButton1 = new System.Windows.Forms.RadioButton();
			this.listBox1 = new System.Windows.Forms.ListBox();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(128, 56);
			this.button1.Name = "button1";
			this.button1.TabIndex = 0;
			this.button1.Text = "按钮";
			this.button1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.button1_MouseUp);
			this.button1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.button1_MouseMove);
			this.button1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.button1_MouseDown);
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(192, 208);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(56, 16);
			this.label1.TabIndex = 1;
			this.label1.Text = "静态文本";
			this.label1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.label1_MouseUp);
			this.label1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.label1_MouseMove);
			this.label1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.label1_MouseDown);
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(192, 168);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(160, 21);
			this.textBox1.TabIndex = 2;
			this.textBox1.Text = "textBox1";
			this.textBox1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.textBox1_MouseDown);
			this.textBox1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.textBox1_MouseUp);
			this.textBox1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.textBox1_MouseMove);
			// 
			// checkBox1
			// 
			this.checkBox1.Location = new System.Drawing.Point(128, 128);
			this.checkBox1.Name = "checkBox1";
			this.checkBox1.TabIndex = 3;
			this.checkBox1.Text = "checkBox1";
			this.checkBox1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.checkBox1_MouseUp);
			this.checkBox1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.checkBox1_MouseMove);
			this.checkBox1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.checkBox1_MouseDown);
			// 
			// radioButton1
			// 
			this.radioButton1.Location = new System.Drawing.Point(128, 96);
			this.radioButton1.Name = "radioButton1";
			this.radioButton1.TabIndex = 4;
			this.radioButton1.Text = "radioButton1";
			this.radioButton1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.radioButton1_MouseUp);
			this.radioButton1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.radioButton1_MouseMove);
			this.radioButton1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.radioButton1_MouseDown);
			// 
			// listBox1
			// 
			this.listBox1.ItemHeight = 12;
			this.listBox1.Location = new System.Drawing.Point(344, 48);
			this.listBox1.Name = "listBox1";
			this.listBox1.Size = new System.Drawing.Size(128, 64);
			this.listBox1.TabIndex = 5;
			this.listBox1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.listBox1_MouseDown);
			this.listBox1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.listBox1_MouseUp);
			this.listBox1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.listBox1_MouseMove);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(592, 365);
			this.Controls.Add(this.listBox1);
			this.Controls.Add(this.radioButton1);
			this.Controls.Add(this.checkBox1);
			this.Controls.Add(this.textBox1);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.button1);
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout(false);

		}
		#endregion

[isjoe]

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void button1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			if(Mousedown)
			{
				//Cursor.Position .X Cursor.Position .Y 是屏幕坐标
				//用屏幕坐标减窗口坐标以保持鼠标总是在窗口的原位置.
				Point sp = new Point(Cursor.Position.X,Cursor.Position.Y);
				Point np = this.PointToClient(sp);
				this.button1.Location = new Point(np.X - CurX,np.Y - CurY);//(Cursor.Position .X - CurX,Cursor.Position .Y - CurY);
			}			
		}

		private void button1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			CurX = e.X;//保存鼠标按下是鼠标在窗口的坐标
			CurY = e.Y;
			Mousedown = true;
			this.button1.Capture = true;
		}

		private void button1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			Mousedown = false;
			this.button1.Capture = false;
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void radioButton1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			CurX = e.X;//保存鼠标按下是鼠标在窗口的坐标
			CurY = e.Y;
			Mousedown = true;
			this.radioButton1.Capture = true;
		}

		private void radioButton1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			if(Mousedown)
			{
				//Cursor.Position .X Cursor.Position .Y 是屏幕坐标
				//用屏幕坐标减窗口坐标以保持鼠标总是在窗口的原位置.
				Point sp = new Point(Cursor.Position.X,Cursor.Position.Y);
				Point np = this.PointToClient(sp);
				this.radioButton1.Location = new Point(np.X - CurX,np.Y - CurY);//(Cursor.Position .X - CurX,Cursor.Position .Y - CurY);
			}
		}

		private void radioButton1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			Mousedown = false;
			this.radioButton1.Capture = false;
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void checkBox1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			CurX = e.X;//保存鼠标按下是鼠标在窗口的坐标
			CurY = e.Y;
			Mousedown = true;
			this.checkBox1.Capture = true;
		}

		private void checkBox1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			if(Mousedown)
			{
				//Cursor.Position .X Cursor.Position .Y 是屏幕坐标
				//用屏幕坐标减窗口坐标以保持鼠标总是在窗口的原位置.
				Point sp = new Point(Cursor.Position.X,Cursor.Position.Y);
				Point np = this.PointToClient(sp);
				this.checkBox1.Location = new Point(np.X - CurX,np.Y - CurY);//(Cursor.Position .X - CurX,Cursor.Position .Y - CurY);
			}
		}

		private void checkBox1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			Mousedown = false;
			this.checkBox1.Capture = false;
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void textBox1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			CurX = e.X;//保存鼠标按下是鼠标在窗口的坐标
			CurY = e.Y;
			Mousedown = true;
			this.textBox1.Capture = true;
		}

		private void textBox1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			if(Mousedown)
			{
				//Cursor.Position .X Cursor.Position .Y 是屏幕坐标
				//用屏幕坐标减窗口坐标以保持鼠标总是在窗口的原位置.
				Point sp = new Point(Cursor.Position.X,Cursor.Position.Y);
				Point np = this.PointToClient(sp);
				this.textBox1.Location = new Point(np.X - CurX,np.Y - CurY);//(Cursor.Position .X - CurX,Cursor.Position .Y - CurY);
			}
		}

		private void textBox1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			Mousedown = false;
			this.textBox1.Capture = false;
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void listBox1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			CurX = e.X;//保存鼠标按下是鼠标在窗口的坐标
			CurY = e.Y;
			Mousedown = true;
			this.listBox1.Capture = true;
		}

		private void listBox1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			if(Mousedown)
			{
				//Cursor.Position .X Cursor.Position .Y 是屏幕坐标
				//用屏幕坐标减窗口坐标以保持鼠标总是在窗口的原位置.
				Point sp = new Point(Cursor.Position.X,Cursor.Position.Y);
				Point np = this.PointToClient(sp);
				this.listBox1.Location = new Point(np.X - CurX,np.Y - CurY);//(Cursor.Position .X - CurX,Cursor.Position .Y - CurY);
			}
		}

		private void listBox1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			Mousedown = false;
			this.listBox1.Capture = false;
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void label1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			CurX = e.X;//保存鼠标按下是鼠标在窗口的坐标
			CurY = e.Y;
			Mousedown = true;
			this.label1.Capture = true;
		}

		private void label1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			if(Mousedown)
			{
				//Cursor.Position .X Cursor.Position .Y 是屏幕坐标
				//用屏幕坐标减窗口坐标以保持鼠标总是在窗口的原位置.
				Point sp = new Point(Cursor.Position.X,Cursor.Position.Y);
				Point np = this.PointToClient(sp);
				this.label1.Location = new Point(np.X - CurX,np.Y - CurY);//(Cursor.Position .X - CurX,Cursor.Position .Y - CurY);
			}
		}

		private void label1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			Mousedown = false;
			this.label1.Capture = false;
		}
	}
}

[liu447862556]

[Quote=引用 2 楼 bdmh 的回复:]
http://blog.csdn.net/dekko/archive/2007/09/24/1797903.aspx
[/Quote]

我看了一下你给推荐的文章，代码我也按上面的写了一下，可是，运行之后没有任何反应。
我是在WinForm里写的，是不是我写错地方了。你可否贴几张图上来。

[liu447862556]

[Quote=引用 6 楼 isjoe 的回复:]
运行后可以用鼠标拖动静态文本、按钮、列表框、单选、复选控件的例子，N年前写的。。。
能找到真是个奇迹。。。

C# code

//csj...
//

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows……
[/Quote]

你的这段代码是在Form.cs下写的么？我怎么看有点像在Form.Designer.cs下写的。
而且，Form.Designer.cs下的代码好像是自动生成的，不需要我们去改写吧。

[liu447862556]

[Quote=引用 7 楼 isjoe 的回复:]
C# code


/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}

……
[/Quote]

这段代码应该是在Form.cs下写的，我试了一下，确实可以实现控件的移动。不过有一个问题，重新运行后控件又回到了原来的位置。
还有，代码中的///后面的字是灰色的，不是注释么？能否解释一下为什么在事件里面///后面的注释还是绿色的，而在事件外的任意地方，当输入///后，或自动出现
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
光标自动停在第二行，等待输入信息，这应该是注释吧。如果是注释的话，用//就可以，不明白为什么要用///，而且字还是灰色的。
我对这只是好奇而已，所以冒昧的问一下。

[liu447862556]

最好有图有注释。

[bdmh]

http://blog.csdn.net/dekko/archive/2007/09/24/1797903.aspx

[xuexiaodong2009]

[Quote=引用 2 楼 bdmh 的回复:]

http://blog.csdn.net/dekko/archive/2007/09/24/1797903.aspx
[/Quote]牛人啊

[luluyy]

MouseMove

MouseDown

MouseUp

这三个事件处理