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摘要：技术看点 WinForm自定义控件的使用 WinForm单窗体应用如何模块化 需求及效果 又来一波 C# GDI自定义控件show 。这个控件已经使用几年了，最近找出来重构一下。原来是没有边框的，那么导致导航的功能不是很突出。本来想加个效果
技术看点
WinForm自定义控件的使用
WinForm单窗体应用如何模块化
需求及效果
又来一波 C# GDI自定义控件show 。这个控件已经使用几年了，最近找出来重构一下。原来是没有边框的，那么导致导航的功能不是很突出。本来想加个效果：在执行单击时显示Loading动画，在执行完单击事件后恢复原样。这就是网页里见到的局部刷新，Ajax常用的场景。无奈要下班了，还没弄出来。需求来自几年前一个智能储物柜项目，人机界面有个美工设计好的效果图，为了省事和通用，需要一个透明的按钮来实现导航的任务。就是控件只是设计时可见，运行时不可见。
关键点说明
1）、GraphicsPath实现矩形的圆角羽化处理
using (GraphicsPath path = new GraphicsPath())
{
#region 羽化，圆角处理
path.StartFigure();
path.AddArc(new Rectangle(new Point(rect.X, rect.Y), new Size(2 * Radius, 2 * Radius)), 180, 90);
path.AddLine(new Point(rect.X + Radius, rect.Y), new Point(rect.Right - Radius, rect.Y));
path.AddArc(new Rectangle(new Point(rect.Right - 2 * Radius, rect.Y), new Size(2 * Radius, 2 * Radius)), 270, 90);
path.AddLine(new Point(rect.Right, rect.Y + Radius), new Point(rect.Right, rect.Bottom - Radius));
path.AddArc(new Rectangle(new Point(rect.Right - 2 * Radius, rect.Bottom - 2 * Radius), new Size(2 * Radius, 2 * Radius)), 0, 90);
path.AddLine(new Point(rect.Right - Radius, rect.Bottom), new Point(rect.X + Radius, rect.Bottom));
path.AddArc(new Rectangle(new Point(rect.X, rect.Bottom - 2 * Radius), new Size(2 * Radius, 2 * Radius)), 90, 90);
path.AddLine(new Point(rect.X, rect.Bottom - Radius), new Point(rect.X, rect.Y + Radius));
path.CloseFigure();
#endregion
要点就是画几段弧线和矩形连接起来。透明就是用了Color.FromArgb加上透明度，然后填充GraphicsPath形成透明区域。
g.FillPath(new SolidBrush(Color.FromArgb(153, BackColor)), path);
2)、单窗体应用如何模块化
窗体只有一个，但操作界面好多个，由于是无人值守的应用。那么老是切换窗体操作是非常不方便的。工作区域是一个容器Panel,把每个操作界面定义成一个Panel作为只容器。
public partial class DepositBizPanel : UserControl
{
private BackgroundStyle backgroundStyle = BackgroundStyle.Green;
/// <summary>
/// 主题风格
/// </summary>
public BackgroundStyle BackgroundStyle
{
get { return backgroundStyle; }
set
{
backgroundStyle = value;
switch (value)
{
case GreenlandExpressBox.BackgroundStyle.Blue:
BackgroundImage = Properties.Resources.jbblue;
break;
case GreenlandExpressBox.BackgroundStyle.Orange:
BackgroundImage = Properties.Resources.jborange;
break;
case GreenlandExpressBox.BackgroundStyle.Green:
BackgroundImage = Properties.Resources.jbgreen;
break;
}
Invalidate();
}
}
public Panel ParentPanel
{
get;
set;
}
public Bitmap QR_Barcode
{
get { return (Bitmap)pbxBarcode.Image; }
set { pbxBarcode.Image = value; }
}
public DialogResult PanelDiagResult
{
get;
set;
}
public DepositBizPanel(Panel parent, Bitmap barcode, BackgroundStyle style)
{
InitializeComponent();
DoubleBuffered = true;
ParentPanel = parent;
QR_Barcode = barcode;
BackgroundStyle = style;
}
private void btnback_Click(object sender, EventArgs e)
{
foreach (Control panel in ParentPanel.Controls)
{
if (panel is DepositBizPanel)
{
ParentPanel.Controls.Remove(panel);
PanelDiagResult = DialogResult.Cancel;
break;
}
}
}
private void btnprocessnext_Click(object sender, EventArgs e)
{
foreach (Control panel in ParentPanel.Controls)
{
if (panel is DepositBizPanel)
{
ParentPanel.Controls.Remove(panel);
PanelDiagResult = DialogResult.OK;
break;
}
}
}
}
人机操作界面例子
透明按钮自定义控件全部代码
自定义按钮：
/// <summary>
/// Cool透明自定义按钮
/// </summary>
public partial class CoolTransparentButton : UserControl
{
private Size iconSize = new Size(32, 32);
public Size IconSize
{
get
{
return iconSize;
}
set
{
iconSize = value;
Invalidate();
}
}
private string _ButtonText;
public string ButtonText
{
get { return _ButtonText; }
set
{
_ButtonText = value;
Invalidate();
}
}
protected Image _IconImage;
public Image IconImage
{
get
{
return _IconImage;
}
set
{
_IconImage = value;
Invalidate();
}
}
private bool _FocseActived = false;
private Color _BorderColor = Color.White;
public Color BorderColor
{
get
{
return _BorderColor;
}
set
{
_BorderColor = value;
Invalidate();
}
}
private int _Radius = 12;
public int Radius
{
get
{
return _Radius;
}
set
{
_Radius = value;
Invalidate();
}
}
private bool ifDrawBorderWhenLostFocse = true;
/// <summary>
/// 失去焦点是否画边框
/// </summary>
public bool IfDrawBorderWhenLostFocse
{
get
{
return ifDrawBorderWhenLostFocse;
}
set
{
ifDrawBorderWhenLostFocse = value;
Invalidate();
}
}
/// <summary>
/// 是否处于激活状态(焦点)
/// </summary>
public bool FocseActived
{
get { return _FocseActived; }
set
{
_FocseActived = value;
Invalidate();
}
}
public CoolTransparentButton()
{
DoubleBuffered = true;
BackColor = Color.Transparent;
SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw, true);
SetStyle(ControlStyles.Opaque, false);
UpdateStyles();
}
protected override void OnPaint(PaintEventArgs e)
{
var rect = ClientRectangle;
rect.Inflate(-1, -1);
Graphics g = e.Graphics;
g.SmoothingMode = SmoothingMode.HighQuality;
using (GraphicsPath path = new GraphicsPath())
{
#region 羽化，圆角处理
path.StartFigure();
path.AddArc(new Rectangle(new Point(rect.X, rect.Y), new Size(2 * Radius, 2 * Radius)), 180, 90);
path.AddLine(new Point(rect.X + Radius, rect.Y), new Point(rect.Right - Radius, rect.Y));
path.AddArc(new Rectangle(new Point(rect.Right - 2 * Radius, rect.Y), new Size(2 * Radius, 2 * Radius)), 270, 90);
path.AddLine(new Point(rect.Right, rect.Y + Radius), new Point(rect.Right, rect.Bottom - Radius));
path.AddArc(new Rectangle(new Point(rect.Right - 2 * Radius, rect.Bottom - 2 * Radius), new Size(2 * Radius, 2 * Radius)), 0, 90);
path.AddLine(new Point(rect.Right - Radius, rect.Bottom), new Point(rect.X + Radius, rect.Bottom));
path.AddArc(new Rectangle(new Point(rect.X, rect.Bottom - 2 * Radius), new Size(2 * Radius, 2 * Radius)), 90, 90);
path.AddLine(new Point(rect.X, rect.Bottom - Radius), new Point(rect.X, rect.Y + Radius));
path.CloseFigure();
#endregion
if (!FocseActived)
{
if (ifDrawBorderWhenLostFocse)
g.DrawPath(new Pen(Color.Gray, 1), path);
g.FillPath(new SolidBrush(Color.FromArgb(66, BackColor)), path);
}
else
{
g.DrawPath(new Pen(BorderColor, 1), path);
rect.Inflate(-1, -1);
g.FillPath(new SolidBrush(Color.FromArgb(153, BackColor)), path);
}
#region 画文本
g.SmoothingMode = SmoothingMode.AntiAlias;
if (IconImage != null)
{
Rectangle rc = new Rectangle((Width - 32) / 2, 16, IconSize.Width, IconSize.Height);
g.DrawImage(IconImage, rc);
}
if (!string.IsNullOrEmpty(ButtonText))
{
using (StringFormat f = new StringFormat())
{
Rectangle rectTxt = new Rectangle(0, (Height - 18) / 2, Width, 36);
f.Alignment = StringAlignment.Center;// 水平居中对齐
f.LineAlignment = StringAlignment.Center; // 垂直居中对齐
f.FormatFlags = StringFormatFlags.NoWrap;// 设置为单行文本
SolidBrush fb = new SolidBrush(this.ForeColor); // 绘制文本
e.Graphics.DrawString(ButtonText, new Font("微软雅黑", 16F, FontStyle.Bold), fb, rectTxt, f);
}
}
#endregion
}
}
protected override void OnMouseHover(EventArgs e)
{
FocseActived = true;
}
protected override void OnMouseLeave(EventArgs e)
{
FocseActived = false;
}
protected override void OnEnter(EventArgs e)
{
FocseActived = true;
}
protected override void OnLeave(EventArgs e)
{
FocseActived = false;
}
}
注释不是很多，如有需要拿走不谢.