C#中WinForm控件的拖動和縮放的完成代碼。本站提示廣大學習愛好者：（C#中WinForm控件的拖動和縮放的完成代碼）文章只能為提供參考，不一定能成為您想要的結果。以下是C#中WinForm控件的拖動和縮放的完成代碼正文
C# WinForm控件的拖動和縮放是個很有用的功用。完成起來其實很復雜的，次要是設計控件的MouseDown、MouseLeave、MouseMove事情,上面的幾個步驟將逐漸完成C# WinForm控件的拖動和縮放的功用。
1、定義一個枚舉類型，描繪光標形態
private enum EnumMousePointPosition
{
MouseSizeNone = 0, //'無
MouseSizeRight = 1, //'拉伸左邊框
MouseSizeLeft = 2, //'拉伸右邊框
MouseSizeBottom = 3, //'拉伸下邊框
MouseSizeTop = 4, //'拉伸上邊框
MouseSizeTopLeft = 5, //'拉伸左上角
MouseSizeTopRight = 6, //'拉伸右上角
MouseSizeBottomLeft = 7, //'拉伸左下角
MouseSizeBottomRight= 8, //'拉伸右下角
MouseDrag = 9 // '鼠標拖動
}
2、定義幾個變量
const int Band = 5; const int MinWidth=10; const int MinHeight=10; private EnumMousePointPosition m_MousePointPosition; private Point p,p1;
3、定義自己的MyMouseDown事情
private void MyMouseDown(object sender,System.Windows.Forms.MouseEventArgs e)
{
p.X=e.X;
p.Y=e.Y;
p1.X=e.X;
p1.Y=e.Y;
}
4、定義自己的MyMouseLeave事情
private void MyMouseLeave(object sender, System.EventArgs e)
{
m_MousePointPosition = EnumMousePointPosition.MouseSizeNone;
this.Cursor=Cursors.Arrow;
}
5、設計一個函數，確定光標在控件不同地位的款式
private EnumMousePointPosition MousePointPosition(Size size,System.Windows.Forms.MouseEventArgs e)
{
if ((e.X >= -1 * Band) | (e.X <= size.Width) | (e.Y >= -1 * Band) | (e.Y <= size.Height))
{
if (e.X < Band)
{
if (e.Y < Band) {return EnumMousePointPosition.MouseSizeTopLeft;}
else
{
if (e.Y > -1 * Band + size.Height)
{return EnumMousePointPosition.MouseSizeBottomLeft;}
else
{return EnumMousePointPosition.MouseSizeLeft;}
}
}
else
{
if (e.X > -1 * Band + size.Width)
{
if (e.Y < Band)
{return EnumMousePointPosition.MouseSizeTopRight;}
else
{
if (e.Y > -1 * Band + size.Height)
{return EnumMousePointPosition.MouseSizeBottomRight;}
else
{return EnumMousePointPosition.MouseSizeRight;}
}
}
else
{
if (e.Y < Band)
{return EnumMousePointPosition.MouseSizeTop;}
else
{
if (e.Y > -1 * Band + size.Height)
{return EnumMousePointPosition.MouseSizeBottom;}
else
{return EnumMousePointPosition.MouseDrag;}
}
}
}
}
else
{return EnumMousePointPosition.MouseSizeNone;}
}
6、定義自己的MyMouseMove事情，在這個事情裡，會運用下面設計的函數
private void MyMouseMove(object sender,System.Windows.Forms.MouseEventArgs e)
{
Control lCtrl =(sender as Control);
if (e.Button==MouseButtons.Left)
{
switch (m_MousePointPosition)
{
case EnumMousePointPosition.MouseDrag:
lCtrl.Left =lCtrl.Left+ e.X - p.X;
lCtrl.Top =lCtrl.Top+ e.Y - p.Y;
break;
case EnumMousePointPosition.MouseSizeBottom:
lCtrl.Height = lCtrl.Height + e.Y - p1.Y;
p1.X=e.X;
p1.Y=e.Y; //'記載光標拖動的以後點
break;
case EnumMousePointPosition.MouseSizeBottomRight:
lCtrl.Width = lCtrl.Width + e.X - p1.X;
lCtrl.Height = lCtrl.Height + e.Y - p1.Y;
p1.X=e.X;
p1.Y=e.Y; //'記載光標拖動的以後點
break;
case EnumMousePointPosition.MouseSizeRight:
lCtrl.Width = lCtrl.Width + e.X - p1.X;
// lCtrl.Height = lCtrl.Height + e.Y - p1.Y;
p1.X=e.X;
p1.Y=e.Y; //'記載光標拖動的以後點
break;
case EnumMousePointPosition.MouseSizeTop:
lCtrl.Top = lCtrl.Top + (e.Y - p.Y);
lCtrl.Height = lCtrl.Height - (e.Y - p.Y);
break;
case EnumMousePointPosition.MouseSizeLeft:
lCtrl.Left = lCtrl.Left + e.X - p.X;
lCtrl.Width = lCtrl.Width - (e.X - p.X);
break;
case EnumMousePointPosition.MouseSizeBottomLeft:
lCtrl.Left = lCtrl.Left + e.X - p.X;
lCtrl.Width = lCtrl.Width - (e.X - p.X);
lCtrl.Height = lCtrl.Height+ e.Y - p1.Y;
p1.X=e.X;
p1.Y=e.Y; //'記載光標拖動的以後點
break;
case EnumMousePointPosition.MouseSizeTopRight:
lCtrl.Top = lCtrl.Top + (e.Y - p.Y);
lCtrl.Width = lCtrl.Width + (e.X - p1.X);
lCtrl.Height = lCtrl.Height - (e.Y - p.Y);
p1.X=e.X;
p1.Y=e.Y; //'記載光標拖動的以後點
break;
case EnumMousePointPosition.MouseSizeTopLeft:
lCtrl.Left = lCtrl.Left + e.X - p.X;
lCtrl.Top = lCtrl.Top + (e.Y - p.Y);
lCtrl.Width = lCtrl.Width - (e.X - p.X);
lCtrl.Height = lCtrl.Height - (e.Y - p.Y);
break;
default:
break;
}
if (lCtrl.Width<MinWidth) lCtrl.Width=MinWidth;
if (lCtrl.Height<MinHeight) lCtrl.Height=MinHeight;
}
else
{
m_MousePointPosition = MousePointPosition(lCtrl.Size, e); //'判別光標的地位形態
switch (m_MousePointPosition) //'改動光標
{
case EnumMousePointPosition.MouseSizeNone:
this.Cursor = Cursors.Arrow; //'箭頭
break;
case EnumMousePointPosition.MouseDrag:
this.Cursor = Cursors.SizeAll; //'四方向
break;
case EnumMousePointPosition.MouseSizeBottom:
this.Cursor = Cursors.SizeNS; //'南北
break;
case EnumMousePointPosition.MouseSizeTop:
this.Cursor = Cursors.SizeNS; //'南北
break;
case EnumMousePointPosition.MouseSizeLeft:
this.Cursor = Cursors.SizeWE; //'東西
break;
case EnumMousePointPosition.MouseSizeRight:
this.Cursor = Cursors.SizeWE; //'東西
break;
case EnumMousePointPosition.MouseSizeBottomLeft:
this.Cursor = Cursors.SizeNESW; //'西南到南西
break;
case EnumMousePointPosition.MouseSizeBottomRight:
this.Cursor = Cursors.SizeNWSE; //'西北到東南
break;
case EnumMousePointPosition.MouseSizeTopLeft:
this.Cursor = Cursors.SizeNWSE; //'西北到東南
break;
case EnumMousePointPosition.MouseSizeTopRight:
this.Cursor = Cursors.SizeNESW; //'西南到南西
break;
default:
break;
}
}
}
7、制造一個初始化進程，將界面panel1上的一切控件都綁定MyMouseDown、MyMouseLeave、MyMouseMove事情，記得在Form初始化或許Form_Load時先執行它。
private void initProperty()
{
for(int i = 0; i < this.panel1.Controls.Count; i++)
{
this.panel1.Controls[i].MouseDown+= new System.Windows.Forms.MouseEventHandler(MyMouseDown);
this.panel1.Controls[i].MouseLeave+= new System.EventHandler(MyMouseLeave);
this.panel1.Controls[i].MouseMove += new System.Windows.Forms.MouseEventHandler(MyMouseMove);
}
}
8、ok，在運轉之前你在panel1上放幾個控件，執行順序，應該可以隨意挪動、改動其大小了
C# WinForm控件的拖動和縮放的完成就此完成。
以上就是本文的全部內容，希望對大家的學習有所協助，也希望大家多多支持。
