如何使用GDI+划直线？
下面是代码，很容易看懂的，没有必要进行解释了吧。:)
usingSystem;usingSystem.Collections.Generic;usingSystem.Text;usingSystem.Drawing;usingSystem.Windows.Forms;publicclassLine:System.Windows.Forms.UserControl
{
///<summary>
///Requireddesignervariable.
///</summary>privateSystem.ComponentModel.Containercomponents=null;publicLine(){//ThiscallisrequiredbytheWindows.FormsFormDesigner.InitializeComponent();SetStyle(ControlStyles.AllPaintingInWmPaint|ControlStyles.UserPaint|ControlStyles.FixedHeight|ControlStyles.FixedWidth|ControlStyles.ResizeRedraw,true);SetStyle(ControlStyles.Selectable,false);TabStop=false;}///<summary>///Cleanupanyresourcesbeingused.///</summary>protectedoverridevoidDispose(booldisposing){if(disposing){if(components!=null){components.Dispose();}}base.Dispose(disposing);}ComponentDesignergeneratedcodeprotectedoverridevoidOnPaint(PaintEventArgse){base.OnPaint(e);intx1,x2,x3,x4,y1,y2,y3,y4;if(LineStyle==LineStyle.Horizontal){x1=0;y1=0;x2=ClientRectangle.Width;y2=0;x3=0;y3=1;x4=ClientRectangle.Width;y4=1;}else//if(LineStyle==LineStyle.Vertical){x1=0;y1=0;x2=0;y2=ClientRectangle.Height;x3=1;y3=0;x4=1;y4=ClientRectangle.Height;}using(Penp=newPen(m_FirstColor,1)){p.DashStyle=mDashStyle;e.Graphics.DrawLine(p,x1,y1,x2,y2);}using(Penp=newPen(m_SecondColor,1)){p.DashStyle=mDashStyle;e.Graphics.DrawLine(p,x3,y3,x4,y4);}}privateSystem.Drawing.Drawing2D.DashStylemDashStyle=System.Drawing.Drawing2D.DashStyle.Solid;publicSystem.Drawing.Drawing2D.DashStyleDashStyle{get{returnmDashStyle;}set{mDashStyle=value;Invalidate();}}privateColorm_FirstColor=Color.FromKnownColor(KnownColor.ControlDark);publicColorFirstColor{get{returnm_FirstColor;}set{m_FirstColor=value;Invalidate();}}privateColorm_SecondColor=Color.FromKnownColor(KnownColor.ControlLightLight);publicColorSecondColor{get{returnm_SecondColor;}set{m_SecondColor=value;Invalidate();}}privateLineStylem_LineStyle=LineStyle.Horizontal;publicLineStyleLineStyle{get{returnm_LineStyle;}set{m_LineStyle=value;Size=newSize(Height,Width);Invalidate();}}protectedoverridevoidOnSizeChanged(EventArgse){base.OnSizeChanged(e);ChangeControlSize();}privatevoidChangeControlSize(){if(LineStyle==LineStyle.Horizontal)Height=2;elseif(LineStyle==LineStyle.Vertical)Width=2;}
}publicenumLineStyle{Horizontal=1,Vertical=2}本文地址：http://www.45fan.com/dnjc/73573.html