版主、高手赐教：如何在运行时通过鼠标拖动改变控件的大小

下面是我写的一个类，你直接使用它就可以了。它可以使窗体上的控件象设计时一样自由移动和伸缩，缺点是控件的父控件必须是窗体，如果你有兴趣可以完善它。
使用：
假设你有一个窗体frm1，窗体上有一个Lable--lable1，添加下面的语句就可以了，比如：
private void frm1_Load(object sender,EventArgs e)
{
Resize rs=new Resize(lable1,frm1);
}
类代码：
public class Resize
{ bool IsMoving=false;
int ctrlLastWidth=0;
int ctrlLastHeight=0;
int ctrlWidth;
int ctrlHeight;
int ctrlLeft;
int ctrlTop;
int cursorL;
int cursorT;
int ctrlLastLeft;
int ctrlLastTop;
bool ctrlIsResizing=false;
System.Drawing.Rectangle ctrlRectangle = new System.Drawing.Rectangle();
private Control ctrl;
private Form frm;
public Resize(Control c,Form frm)
{
ctrl=c;
this.frm=frm;
ctrl.MouseDown+=new MouseEventHandler(MouseDown);
ctrl.MouseMove+=new MouseEventHandler(MouseMove);
ctrl.MouseUp+=new MouseEventHandler(MouseUp);
}
private void MouseMove(object sender,MouseEventArgs e)
{
if (frm==null)
return;
if (e.Button==MouseButtons.Left)
{
if(this.IsMoving)
{
if (ctrlLastLeft == 0)
ctrlLastLeft = ctrlLeft;
if (ctrlLastTop==0)
ctrlLastTop = ctrlTop;
int locationX=(Cursor.Position.X-this.cursorL+this.frm.DesktopLocation.X+this.ctrl.Location.X);
int locationY=(Cursor.Position.Y-this.cursorT+this.frm.DesktopLocation.Y+this.ctrl.Location.Y);
if(locationX<this.frm.DesktopLocation.X)
locationX=this.frm.DesktopLocation.X;
if(locationY<this.frm.DesktopLocation.Y)
locationY=this.frm.DesktopLocation.Y;
this.ctrlLeft=locationX;
this.ctrlTop=locationY;
ctrlRectangle.Location = new System.Drawing.Point(this.ctrlLastLeft,this.ctrlLastTop);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
ctrlLastLeft = ctrlLeft;
ctrlLastTop = ctrlTop;
ctrlRectangle.Location = new System.Drawing.Point(ctrlLeft,ctrlTop);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
return;
}
int sizeageX = (Cursor.Position.X-this.frm.DesktopLocation.X-this.ctrl.Location.X);
int sizeageY = (Cursor.Position.Y-this.frm.DesktopLocation.Y-this.ctrl.Location.Y);
if (sizeageX < 2)
sizeageX = 1;
if (sizeageY < 2)
sizeageY = 1;
ctrlWidth = sizeageX;
ctrlHeight = sizeageY;
if (ctrlLastWidth == 0)
ctrlLastWidth = ctrlWidth;
if (ctrlLastHeight==0)
ctrlLastHeight = ctrlHeight;
if (ctrlIsResizing)
{
ctrlRectangle.Location = new System.Drawing.Point(this.frm.DesktopLocation.X+this.ctrl.Left,this.frm.DesktopLocation.Y+this.ctrl.Top);
ctrlRectangle.Size = new System.Drawing.Size(ctrlLastWidth,ctrlLastHeight);
}
ctrlIsResizing = true;
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
ctrlLastWidth = ctrlWidth;
ctrlLastHeight = ctrlHeight;
ctrlRectangle.Location = new System.Drawing.Point(this.frm.DesktopLocation.X+this.ctrl.Left,this.frm.DesktopLocation.Y+this.ctrl.Top);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
}
}
private void MouseDown(object sender,MouseEventArgs e)
{
if (frm==null)
return;
if (e.X<this.ctrl.Width-10||e.Y<this.ctrl.Height-10)
{
this.IsMoving=true;
this.ctrlLeft=this.frm.DesktopLocation.X+this.ctrl.Left;
this.ctrlTop=this.frm.DesktopLocation.Y+this.ctrl.Top;
this.cursorL=Cursor.Position.X;
this.cursorT=Cursor.Position.Y;
this.ctrlWidth=this.ctrl.Width;
this.ctrlHeight=this.ctrl.Height;
}
ctrlRectangle.Location = new System.Drawing.Point(this.ctrlLeft,this.ctrlTop);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
}
private void MouseUp(object sender,MouseEventArgs e)
{
if (frm==null)
return;
ctrlIsResizing = false;
if (this.IsMoving)
{
ctrlRectangle.Location = new System.Drawing.Point(this.ctrlLeft,this.ctrlTop);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
this.ctrl.Left=this.ctrlLeft-this.frm.DesktopLocation.X;
this.ctrl.Top=this.ctrlTop-this.frm.DesktopLocation.Y;
this.IsMoving=false;
return;
}
ctrlRectangle.Location = new System.Drawing.Point(this.frm.DesktopLocation.X+this.ctrl.Left,this.frm.DesktopLocation.Y+this.ctrl.Top);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
this.ctrl.Width = ctrlWidth;
this.ctrl.Height = ctrlHeight;
}
}

dy_2000_abc(芝麻开门):
我运行你的程序是出现这个问题：“frm1是类，这里应该是变量”。然后我直接用一个label代替你ctrl，运行没问题，控件也可以移动，但你的控件虚线却出现在控件上，也不可以拉伸？是不是我调试有问题呢？
十分感谢！

这是我从我写的一个控件里临时弄出的一点代码，需要改动一下才能用好。在MouseUp后面添加ctrl.Refresh();这样虚线就没有了。你将鼠标放到控件右下角，就可以拉伸控件了。还有的问题就是位置问题，控件的实际位置总是比你放置的位置大处frm1.Location.X-frm1.ClientRectangle.X和frm1.Location.Y-frm.ClientRectangle.Y。

我把代码改完整，这样好用多了，
public class ResizeAction
{ bool IsMoving=false;
int ctrlLastWidth=0;
int ctrlLastHeight=0;
int ctrlWidth;
int ctrlHeight;
int ctrlLeft;
int ctrlTop;
int cursorL;
int cursorT;
int ctrlLastLeft;
int ctrlLastTop;
int Htap;
int Wtap;
bool ctrlIsResizing=false;
System.Drawing.Rectangle ctrlRectangle = new System.Drawing.Rectangle();
private Control ctrl;
private Form frm;
public ResizeAction(Control c,Form frm)
{
ctrl=c;
this.frm=frm;
this.Htap=this.frm.Height-this.frm.ClientRectangle.Height;
this.Wtap=this.frm.Width-this.frm.ClientRectangle.Width;
ctrl.MouseDown+=new MouseEventHandler(MouseDown);
ctrl.MouseMove+=new MouseEventHandler(MouseMove);
ctrl.MouseUp+=new MouseEventHandler(MouseUp);
}
public void MouseMove(object sender,MouseEventArgs e)
{
if (frm==null)
return;
if (e.Button==MouseButtons.Left)
{
if(this.IsMoving)
{
if (ctrlLastLeft == 0)
ctrlLastLeft = ctrlLeft;
if (ctrlLastTop==0)
ctrlLastTop = ctrlTop;
int locationX=(Cursor.Position.X-this.cursorL+this.frm.DesktopLocation.X+this.Wtap+this.ctrl.Location.X);
int locationY=(Cursor.Position.Y-this.cursorT+this.frm.DesktopLocation.Y+this.Htap+this.ctrl.Location.Y);
if(locationX<this.frm.DesktopLocation.X+this.Wtap)
locationX=this.frm.DesktopLocation.X+this.Wtap;
if(locationY<this.frm.DesktopLocation.Y+this.Htap)
locationY=this.frm.DesktopLocation.Y+this.Htap;
this.ctrlLeft=locationX;
this.ctrlTop=locationY;
ctrlRectangle.Location = new System.Drawing.Point(this.ctrlLastLeft,this.ctrlLastTop);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
ctrlLastLeft = ctrlLeft;
ctrlLastTop = ctrlTop;
ctrlRectangle.Location = new System.Drawing.Point(ctrlLeft,ctrlTop);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
return;
}
int sizeageX = (Cursor.Position.X-this.frm.DesktopLocation.X-this.Wtap-this.ctrl.Location.X);
int sizeageY = (Cursor.Position.Y-this.frm.DesktopLocation.Y-this.Htap-this.ctrl.Location.Y);
if (sizeageX < 2)
sizeageX = 1;
if (sizeageY < 2)
sizeageY = 1;
ctrlWidth = sizeageX;
ctrlHeight = sizeageY;
if (ctrlLastWidth == 0)
ctrlLastWidth = ctrlWidth;
if (ctrlLastHeight==0)
ctrlLastHeight = ctrlHeight;
if (ctrlIsResizing)
{
ctrlRectangle.Location = new System.Drawing.Point(this.frm.DesktopLocation.X+this.ctrl.Left+this.Wtap,this.frm.DesktopLocation.Y+this.Htap+this.ctrl.Top);
ctrlRectangle.Size = new System.Drawing.Size(ctrlLastWidth,ctrlLastHeight);
}
ctrlIsResizing = true;
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
ctrlLastWidth = ctrlWidth;
ctrlLastHeight = ctrlHeight;
ctrlRectangle.Location = new System.Drawing.Point(this.frm.DesktopLocation.X+this.Wtap+this.ctrl.Left,this.frm.DesktopLocation.Y+this.Htap+this.ctrl.Top);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
}
}
public void MouseDown(object sender,MouseEventArgs e)
{
if (frm==null)
return;
if (e.X<this.ctrl.Width-10||e.Y<this.ctrl.Height-10)
{
this.IsMoving=true;
this.ctrlLeft=this.frm.DesktopLocation.X+this.Wtap+this.ctrl.Left;
this.ctrlTop=this.frm.DesktopLocation.Y+this.Htap+this.ctrl.Top;
this.cursorL=Cursor.Position.X;
this.cursorT=Cursor.Position.Y;
this.ctrlWidth=this.ctrl.Width;
this.ctrlHeight=this.ctrl.Height;
}
ctrlRectangle.Location = new System.Drawing.Point(this.ctrlLeft,this.ctrlTop);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
}
public void MouseUp(object sender,MouseEventArgs e)
{
if (frm==null)
return;
ctrlIsResizing = false;
if (this.IsMoving)
{
ctrlRectangle.Location = new System.Drawing.Point(this.ctrlLeft,this.ctrlTop);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
this.ctrl.Left=this.ctrlLeft-this.frm.DesktopLocation.X-this.Wtap;
this.ctrl.Top=this.ctrlTop-this.frm.DesktopLocation.Y-this.Htap;
this.IsMoving=false;
this.ctrl.Refresh();
return;
}
ctrlRectangle.Location = new System.Drawing.Point(this.frm.DesktopLocation.X+this.Wtap+this.ctrl.Left,this.frm.DesktopLocation.Y+this.Htap+this.ctrl.Top);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
this.ctrl.Width = ctrlWidth;
this.ctrl.Height = ctrlHeight;
this.ctrl.Refresh();
}
}

奇怪，我还是无法拉伸。还有这个问题：“frm1是类，这里应该是变量”该如何解决呢？谢谢！！！

打个比方：
Form1 frm=new Form1();
你传递的是Form1，Form1是类，你需要传递变量 frm

如果在窗体Load时，传递 this 表示本窗体

我这样子：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;namespace ResizeCtrl
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Label label1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null; 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
//
}
private void Form1_Load(object sender,EventArgs e)
{
ResizeAction rs=new ResizeAction(label1,this);
}
/// <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 Form Designer generated code
/// <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.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// label1
//
this.label1.Location = new System.Drawing.Point(64, 48);
this.label1.Name = "label1";
this.label1.TabIndex = 0;
this.label1.Text = "label1";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.label1});
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false); }
#endregion [STAThread]
static void Main()
{
Application.Run(new Form1());
}
}
}
是没错误，但lable1不能移动和收缩。。:( 我太笨了。。

我在代码中设置在不离开控件右下角10*10像素时，鼠标拉动将调整控件的大小。我估计你的问题是你用的控件是Label，它的右下角不一定是文字内容的右下角，你在Lable上按下鼠标，你将看到一个虚线框，那才是Lable的工作区域。为了直观一些，你使用Button，看得就清楚了。

不好意思。连移动都不行。能不能帮我看看我上面的调试方法对不对吗？我想应该是那样调试的。我昨晚用了textbox试过还是老问题。你能否能把调试好的程序寄给我下。[email protected]，这么多次麻烦你真的不好意思！！！

TextBox也是可以的，我测试过Vs.net上的控件，都没有问题。TextBox的问题是你需要小心地注意鼠标的位置，你把鼠标放到TextBox的右下角，看到鼠标显示为|时，点击拉动就可以调整大小了，当然，如果TextBox的MultiLine=false的话，你就只能调整它的宽了。如果嫌麻烦，你可以将调整大小的区域设大一些，具体设置if (e.X<this.ctrl.Width-10||e.Y<this.ctrl.Height-10)这一句，将10改成20或者其他
我将调用的代码贴出来，将它Copy过去执行就可以了：using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;namespace WindowsApplication2
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.ToolBar toolBar1;
private System.Windows.Forms.ToolBarButton toolBarButton1;
private System.Windows.Forms.ToolBarButton toolBarButton2;
private System.Windows.Forms.ToolBarButton toolBarButton3;
private System.Windows.Forms.ComboBox comboBox1;
private System.Windows.Forms.CheckBox checkBox1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.ListBox listBox1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null; 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 Form Designer generated code
/// <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.panel1 = new System.Windows.Forms.Panel();
this.checkBox1 = new System.Windows.Forms.CheckBox();
this.comboBox1 = new System.Windows.Forms.ComboBox();
this.toolBar1 = new System.Windows.Forms.ToolBar();
this.toolBarButton1 = new System.Windows.Forms.ToolBarButton();
this.toolBarButton2 = new System.Windows.Forms.ToolBarButton();
this.toolBarButton3 = new System.Windows.Forms.ToolBarButton();
this.textBox1 = new System.Windows.Forms.TextBox();
this.listBox1 = new System.Windows.Forms.ListBox();
this.panel1.SuspendLayout();
this.SuspendLayout();
//
// panel1
//
this.panel1.BackColor = System.Drawing.SystemColors.Desktop;
this.panel1.Controls.AddRange(new System.Windows.Forms.Control[] {
this.checkBox1,
this.comboBox1});
this.panel1.Location = new System.Drawing.Point(32, 80);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(208, 48);
this.panel1.TabIndex = 0;
//
// checkBox1
//
this.checkBox1.Location = new System.Drawing.Point(8, 16);
this.checkBox1.Name = "checkBox1";
this.checkBox1.Size = new System.Drawing.Size(56, 24);
this.checkBox1.TabIndex = 1;
this.checkBox1.Text = "abc";
//
// comboBox1
//
this.comboBox1.Items.AddRange(new object[] {
   "a",
   "b",
   "c"});
this.comboBox1.Location = new System.Drawing.Point(88, 16);
this.comboBox1.Name = "comboBox1";
this.comboBox1.Size = new System.Drawing.Size(104, 20);
this.comboBox1.TabIndex = 0;
this.comboBox1.Text = "comboBox1";
//
// toolBar1
//
this.toolBar1.Appearance = System.Windows.Forms.ToolBarAppearance.Flat;
this.toolBar1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.toolBar1.Buttons.AddRange(new System.Windows.Forms.ToolBarButton[] {
this.toolBarButton1,
this.toolBarButton2,
this.toolBarButton3});
this.toolBar1.Dock = System.Windows.Forms.DockStyle.None;
this.toolBar1.DropDownArrows = true;
this.toolBar1.Location = new System.Drawing.Point(40, 8);
this.toolBar1.Name = "toolBar1";
this.toolBar1.ShowToolTips = true;
this.toolBar1.Size = new System.Drawing.Size(208, 40);
this.toolBar1.TabIndex = 1;
//
// toolBarButton1
//
this.toolBarButton1.Pushed = true;
this.toolBarButton1.Text = "a1";
//
// toolBarButton2
//
this.toolBarButton2.Text = "a2";
//
// toolBarButton3
//
this.toolBarButton3.Text = "a3";
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(24, 160);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(88, 21);
this.textBox1.TabIndex = 2;
this.textBox1.Text = "textBox1";
//
// listBox1
//
this.listBox1.ItemHeight = 12;
this.listBox1.Items.AddRange(new object[] {
  "a",
  "b",
  "c"});
this.listBox1.Location = new System.Drawing.Point(128, 160);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(128, 64);
this.listBox1.TabIndex = 3;
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
  this.listBox1,
  this.textBox1,
  this.toolBar1,
  this.panel1});
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.panel1.ResumeLayout(false);
this.ResumeLayout(false); }
#endregion /// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
} private void Form1_Load(object sender, System.EventArgs e)
{
Resize r1=new  Resize(this.toolBar1,this);
Resize r2= new Resize(this.panel1,this);
Resize r3= new Resize(this.textBox1,this);
Resize r4= new Resize(this.listBox1,this); }
}

public class Resize
{ bool IsMoving=false;
int ctrlLastWidth=0;
int ctrlLastHeight=0;
int ctrlWidth;
int ctrlHeight;
int ctrlLeft;
int ctrlTop;
int cursorL;
int cursorT;
int ctrlLastLeft;
int ctrlLastTop;
int Htap;
int Wtap;
bool ctrlIsResizing=false;
System.Drawing.Rectangle ctrlRectangle = new System.Drawing.Rectangle();
private Control ctrl;
private Form frm;
public Resize(Control c,Form frm)
{
ctrl=c;
this.frm=frm;
this.Htap=this.frm.Height-this.frm.ClientRectangle.Height;
this.Wtap=this.frm.Width-this.frm.ClientRectangle.Width;
ctrl.MouseDown+=new MouseEventHandler(MouseDown);
ctrl.MouseMove+=new MouseEventHandler(MouseMove);
ctrl.MouseUp+=new MouseEventHandler(MouseUp);
}
private void MouseMove(object sender,MouseEventArgs e)
{
if (frm==null)
return;
if (e.Button==MouseButtons.Left)
{
if(this.IsMoving)
{
if (ctrlLastLeft == 0)
ctrlLastLeft = ctrlLeft;
if (ctrlLastTop==0)
ctrlLastTop = ctrlTop;
int locationX=(Cursor.Position.X-this.cursorL+this.frm.DesktopLocation.X+this.Wtap+this.ctrl.Location.X);
int locationY=(Cursor.Position.Y-this.cursorT+this.frm.DesktopLocation.Y+this.Htap+this.ctrl.Location.Y);
if(locationX<this.frm.DesktopLocation.X+this.Wtap)
locationX=this.frm.DesktopLocation.X+this.Wtap;
if(locationY<this.frm.DesktopLocation.Y+this.Htap)
locationY=this.frm.DesktopLocation.Y+this.Htap;
this.ctrlLeft=locationX;
this.ctrlTop=locationY;
ctrlRectangle.Location = new System.Drawing.Point(this.ctrlLastLeft,this.ctrlLastTop);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
ctrlLastLeft = ctrlLeft;
ctrlLastTop = ctrlTop;
ctrlRectangle.Location = new System.Drawing.Point(ctrlLeft,ctrlTop);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
return;
}
int sizeageX = (Cursor.Position.X-this.frm.DesktopLocation.X-this.Wtap-this.ctrl.Location.X);
int sizeageY = (Cursor.Position.Y-this.frm.DesktopLocation.Y-this.Htap-this.ctrl.Location.Y);
if (sizeageX < 2)
sizeageX = 1;
if (sizeageY < 2)
sizeageY = 1;
ctrlWidth = sizeageX;
ctrlHeight = sizeageY;
if (ctrlLastWidth == 0)
ctrlLastWidth = ctrlWidth;
if (ctrlLastHeight==0)
ctrlLastHeight = ctrlHeight;
if (ctrlIsResizing)
{
ctrlRectangle.Location = new System.Drawing.Point(this.frm.DesktopLocation.X+this.ctrl.Left+this.Wtap,this.frm.DesktopLocation.Y+this.Htap+this.ctrl.Top);
ctrlRectangle.Size = new System.Drawing.Size(ctrlLastWidth,ctrlLastHeight);
}
ctrlIsResizing = true;
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
ctrlLastWidth = ctrlWidth;
ctrlLastHeight = ctrlHeight;
ctrlRectangle.Location = new System.Drawing.Point(this.frm.DesktopLocation.X+this.Wtap+this.ctrl.Left,this.frm.DesktopLocation.Y+this.Htap+this.ctrl.Top);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
}
}
private void MouseDown(object sender,MouseEventArgs e)
{
if (frm==null)
return;
if (e.X<this.ctrl.Width-10||e.Y<this.ctrl.Height-10)
{
this.IsMoving=true;
this.ctrlLeft=this.frm.DesktopLocation.X+this.Wtap+this.ctrl.Left;
this.ctrlTop=this.frm.DesktopLocation.Y+this.Htap+this.ctrl.Top;
this.cursorL=Cursor.Position.X;
this.cursorT=Cursor.Position.Y;
this.ctrlWidth=this.ctrl.Width;
this.ctrlHeight=this.ctrl.Height;
}
ctrlRectangle.Location = new System.Drawing.Point(this.ctrlLeft,this.ctrlTop);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
}
private void MouseUp(object sender,MouseEventArgs e)
{
if (frm==null)
return;
ctrlIsResizing = false;
if (this.IsMoving)
{
ctrlRectangle.Location = new System.Drawing.Point(this.ctrlLeft,this.ctrlTop);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
this.ctrl.Left=this.ctrlLeft-this.frm.DesktopLocation.X-this.Wtap;
this.ctrl.Top=this.ctrlTop-this.frm.DesktopLocation.Y-this.Htap;
this.IsMoving=false;
this.ctrl.Refresh();
return;
}
ctrlRectangle.Location = new System.Drawing.Point(this.frm.DesktopLocation.X+this.Wtap+this.ctrl.Left,this.frm.DesktopLocation.Y+this.Htap+this.ctrl.Top);
ctrlRectangle.Size = new System.Drawing.Size(ctrlWidth,ctrlHeight);
ControlPaint.DrawReversibleFrame(ctrlRectangle, Color.Empty, System.Windows.Forms.FrameStyle.Dashed);
this.ctrl.Width = ctrlWidth;
this.ctrl.Height = ctrlHeight;
this.ctrl.Refresh();
}
}}

成功！！！请立刻结账！非常感谢dy_2000_abc(芝麻开门)！以后请多多指教！！！

调试易

版主、高手赐教：如何在运行时通过鼠标拖动改变控件的大小

解决方案 »