C#Winform设计的通用标签设计器_.NET_编程开发_程序员俱乐部

技术看点

• PropertyGrid的使用
• 自定义控件的使用
• 对象序列化成XML
• GDI+Windows驱动打印

前言

是的，一不小心把公司名称透露了。索性帮公司打一下广告。公司(上海易溯信息科技)是中国奶制品行业追溯生产管理方面的龙头。最近也是准备把业务拓展到东南亚地区，筹备走出国门。由于老系统的Windows驱动打印部分出现打印速度不够快，绘图精度不高，标签设计器简陋等问题。于是开始了重构，当然只是参考老程序的实现方式，程序是重新实现的。程序是用很零散的空闲时间写的，效果还需要在项目中实际运用，进行检验。

设计

由于一发现不熟悉的技术点就上网搜索，其实大部分技术难题都是搜索解决的。这里就不申明版权问题了，“如有雷同，纯属意外！”。哈哈

运行时读取模板数据，模板里标签的元素的设计

设计时可视化自定义控件的设计类图

编码实现

1)PropertyGrid的使用

代码都来自网络，主要就是属性名使用中文。使用英文对实施的电器工程师来说不太友好。

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public delegate void PropertyChanged(object Value);
    /// <summary>
    /// 主要是实现中文化属性显示
    /// </summary>
    public class PropertyBase : ICustomTypeDescriptor
    {
        AttributeCollection ICustomTypeDescriptor.GetAttributes()
        {
            return TypeDescriptor.GetAttributes(this, true);
        }
        string ICustomTypeDescriptor.GetClassName()
        {
            return TypeDescriptor.GetClassName(this, true);
        }
        string ICustomTypeDescriptor.GetComponentName()
        {
            return TypeDescriptor.GetComponentName(this, true);
        }
        TypeConverter ICustomTypeDescriptor.GetConverter()
        {
            return TypeDescriptor.GetConverter(this, true);
        }
        EventDescriptor ICustomTypeDescriptor.GetDefaultEvent()
        {
            return TypeDescriptor.GetDefaultEvent(this, true);
        }
        PropertyDescriptor ICustomTypeDescriptor.GetDefaultProperty()
        {
            return null;
        }
        object ICustomTypeDescriptor.GetEditor(Type editorBaseType)
        {
            return TypeDescriptor.GetEditor(this, editorBaseType, true);
        }
        EventDescriptorCollection ICustomTypeDescriptor.GetEvents()
        {
            return TypeDescriptor.GetEvents(this, true);
        }
        EventDescriptorCollection ICustomTypeDescriptor.GetEvents(Attribute[] attributes)
        {
            return TypeDescriptor.GetEvents(this, attributes, true);
        }
        PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties()
        {
            return ((ICustomTypeDescriptor)this).GetProperties(new Attribute[0]);
        }
        PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties(Attribute[] attributes)
        {
            ArrayList props = new ArrayList();
            Type thisType = this.GetType();
            PropertyInfo[] pis = thisType.GetProperties();
            foreach (PropertyInfo p in pis)
            {
                if (p.DeclaringType == thisType || p.PropertyType.ToString() == "System.Drawing.Color")
                {
                    //判断属性是否显示
                    BrowsableAttribute Browsable = (BrowsableAttribute)Attribute.GetCustomAttribute(p, typeof(BrowsableAttribute));
                    if (Browsable != null)
                    {
                        if (Browsable.Browsable == true || p.PropertyType.ToString() == "System.Drawing.Color")
                        {
                            PropertyStub psd = new PropertyStub(p, attributes);
                            props.Add(psd);
                        }
                    }
                    else
                    {
                        PropertyStub psd = new PropertyStub(p, attributes);
                        props.Add(psd);
                    }
                }
            }
            PropertyDescriptor[] propArray = (PropertyDescriptor[])props.ToArray(typeof(PropertyDescriptor));
            return new PropertyDescriptorCollection(propArray);
        }
        object ICustomTypeDescriptor.GetPropertyOwner(PropertyDescriptor pd)
        {
            return this;
        }
    }

    /// <summary>
    /// 自定义属性拦截器
    /// </summary>
    public class PropertyStub : PropertyDescriptor
    {
        PropertyInfo info;
        public PropertyStub(PropertyInfo propertyInfo, Attribute[] attrs)
            : base(propertyInfo.Name, attrs)
        {
            info = propertyInfo;
        }
        public override Type ComponentType
        {
            get { return info.ReflectedType; }
        }
        public override bool IsReadOnly
        {
            get { return info.CanWrite == false; }
        }
        public override Type PropertyType
        {
            get { return info.PropertyType; }
        }
        public override bool CanResetValue(object component)
        {
            return false;
        }
        public override object GetValue(object component)
        {
            try
            {
                return info.GetValue(component, null);
            }
            catch
            {
                return null;
            }
        }
        public override void ResetValue(object component)
        {
        }
        public override void SetValue(object component, object value)
        {
            info.SetValue(component, value, null);
        }
        public override bool ShouldSerializeValue(object component)
        {
            return false;
        }
        //通过重载下面这个属性，可以将属性在PropertyGrid中的显示设置成中文
        public override string DisplayName
        {
            get
            {
                if (info != null)
                {
                    ChnPropertyAttribute uicontrolattibute = (ChnPropertyAttribute)Attribute.GetCustomAttribute(info, typeof(ChnPropertyAttribute));
                    if (uicontrolattibute != null)
                        return uicontrolattibute.PropertyName;
                    else
                    {
                        return info.Name;
                    }
                }
                else
                    return "";
            }
        }

        public override string Description
        {
            get
            {
                if (info != null)
                {
                    ChnPropertyAttribute uicontrolattibute = (ChnPropertyAttribute)Attribute.GetCustomAttribute(info, typeof(ChnPropertyAttribute));
                    if (uicontrolattibute != null)
                        return uicontrolattibute.PropertyDescription;
                }
                return string.Empty;
            }
        }
    }

自定义属性拦截器

/// <summary>
    /// 中文方式自定义属性标识
    /// </summary>
    public class ChnPropertyAttribute : Attribute
    {
        private string _PropertyName;
        private string _PropertyDescription;
        
        public ChnPropertyAttribute(string Name, string Description)
        {
            _PropertyName = Name;
            _PropertyDescription = Description;
        }
        public ChnPropertyAttribute(string Name)
        {
            _PropertyName = Name;
            _PropertyDescription = "";
        }
        public string PropertyName
        {
            get { return _PropertyName; }
        }
        public string PropertyDescription
        {
            get { return _PropertyDescription; }
        }
    }

自定义中文属性的Attribute

实际使用中文属性

2)自定义控件的使用

/// <summary>
    /// 标签最顶层容器,标签设计时容器
    /// </summary>
    [Serializable]
    public partial class RadiusRectangleSharp : Panel
    {
        #region 鼠标移动和缩放       
        const int Band = 5;
        const int MinWidth = 10;
        const int MinHeight = 10;
        private EnumMousePointPosition _mMousePointPosition;
        private Point _p, _p1;
        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; }
        }
        #endregion               
        #region Local Variables       
        private Color _borderColor = Color.White;
        private int _radius = 8;
        private int _opacity = 68;
        private Color _dimmedColor = Color.LightGray;
        protected Rectangle IRect = new Rectangle();
        #endregion
        #region Properties        
        public Color BorderColor
        {
            get { return _borderColor; }
            set { _borderColor = value; Invalidate(); }
        }
        public int Opacity
        {
            get { return _opacity; }
            set { _opacity = value; this.Invalidate(); }
        }      
        public int Radius
        {
            get { return _radius; }
            set { _radius = value; this.Invalidate(); }
        }
        /// <summary>
        /// 当前模板信息
        /// </summary>
        public TemplateItemInfo CurrentTemplateInfo
        {
            get
            {
                return _currentTempletInfo;
            }
            set
            {
                _currentTempletInfo = value;
            }
        }
        private TemplateItemInfo _currentTempletInfo = new TemplateItemInfo();
        #endregion        
        public RadiusRectangleSharp()
        {
            InitializeComponent();
            AllowDrop = true;
            BackColor = Color.White;
            SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.SupportsTransparentBackColor | ControlStyles.UserPaint, true);
            SetStyle(ControlStyles.Opaque, true);
            Margin = new Padding(1, 1, 1, 1);
            Padding = new Padding(0, 0, 0, 0);
            BorderColor = Color.DarkBlue;
            UpdateStyles();
            SendToBack();
        }
        protected override void OnPaint(PaintEventArgs e)
        {
            SmoothingMode sm = e.Graphics.SmoothingMode;
            e.Graphics.SmoothingMode = SmoothingMode.HighQuality;
            e.Graphics.Clear(Color.White);
            DrawBorder(e.Graphics);
            DrawBackground(e.Graphics);
            e.Graphics.SmoothingMode = sm;
        }
        protected void DrawBorder(Graphics g)
        {
            Rectangle rect = ClientRectangle;
            rect.Width--;
            rect.Height--;
            using (GraphicsPath bp = GetPath(rect, _radius))
            {
                using (Pen p = new Pen(_borderColor))
                {
                    g.DrawPath(p, bp);
                }
            }
        }
        protected void DrawBackground(Graphics g)
        {
            Rectangle rect = ClientRectangle;
            IRect = rect;
            rect.X++;
            rect.Y++;
            rect.Width -= 2;
            rect.Height -= 2;
            using (GraphicsPath bb = GetPath(rect, _radius))
            {
                using (Brush br = new SolidBrush(Color.FromArgb(_opacity, BackColor)))
                {
                    g.FillPath(br, bb);
                }
            }
        }
        protected GraphicsPath GetPath(Rectangle rc, int r)
        {
            int x = rc.X, y = rc.Y, w = rc.Width, h = rc.Height;
            r = r << 1;
            GraphicsPath path = new GraphicsPath();
            if (r > 0)
            {
                if (r > h) { r = h; };                              //Rounded
                if (r > w) { r = w; };                              //Rounded
                path.AddArc(x, y, r, r, 180, 90);                    //Upper left corner
                path.AddArc(x + w - r, y, r, r, 270, 90);            //Upper right corner
                path.AddArc(x + w - r, y + h - r, r, r, 0, 90);        //Lower right corner
                path.AddArc(x, y + h - r, r, r, 90, 90);            //Lower left corner
                path.CloseFigure();
            }
            else
            {
                path.AddRectangle(rc);
            }
            return path;
        }
        protected override void OnMouseDown(MouseEventArgs e)
        {
            _p.X = e.X;
            _p.Y = e.Y;
            _p1.X = e.X;
            _p1.Y = e.Y;
        }
        protected override void OnMouseUp(MouseEventArgs e)
        {
            _mMousePointPosition = EnumMousePointPosition.MouseSizeNone;
            this.Cursor = Cursors.Arrow;
        }
        protected override void OnMouseMove(MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                //本控件是顶层容器，不允许位移
                switch (_mMousePointPosition)
                {
                    #region 位置计算
                    case EnumMousePointPosition.MouseDrag:
                        break;
                    case EnumMousePointPosition.MouseSizeBottom:
                        Height = Height + e.Y - _p1.Y;
                        _p1.X = e.X;
                        _p1.Y = e.Y; //'记录光标拖动的当前点    
                        break;
                    case EnumMousePointPosition.MouseSizeBottomRight:
                        Width = Width + e.X - _p1.X;
                        Height = Height + e.Y - _p1.Y;
                        _p1.X = e.X;
                        _p1.Y = e.Y; //'记录光标拖动的当前点    
                        break;
                    case EnumMousePointPosition.MouseSizeRight:
                        Width = Width + e.X - _p1.X;
                        Height = Height + e.Y - _p1.Y;
                        _p1.X = e.X;
                        _p1.Y = e.Y; //'记录光标拖动的当前点    
                        break;
                    case EnumMousePointPosition.MouseSizeTop:
                        Height = Height - (e.Y - _p.Y);
                        break;
                    case EnumMousePointPosition.MouseSizeLeft:
                        Width = Width - (e.X - _p.X);
                        break;
                    case EnumMousePointPosition.MouseSizeBottomLeft:
                        Width = Width - (e.X - _p.X);
                        Height = Height + e.Y - _p1.Y;
                        _p1.X = e.X;
                        _p1.Y = e.Y; //'记录光标拖动的当前点    
                        break;
                    case EnumMousePointPosition.MouseSizeTopRight:
                        Width = Width + (e.X - _p1.X);
                        Height = Height - (e.Y - _p.Y);
                        _p1.X = e.X;
                        _p1.Y = e.Y; //'记录光标拖动的当前点    
                        break;
                    case EnumMousePointPosition.MouseSizeTopLeft:
                        Width = Width - (e.X - _p.X);
                        Height = Height - (e.Y - _p.Y);
                        break;
                    default:
                        break;
                        #endregion
                }
                if (Width < MinWidth) Width = MinWidth;
                if (Height < MinHeight) Height = MinHeight;
            }
            else
            {
                _mMousePointPosition = MousePointPosition(Size, e);
                switch (_mMousePointPosition)
                {
                    #region 改变光标
                    case EnumMousePointPosition.MouseSizeNone:
                        this.Cursor = Cursors.Arrow;        //'箭头    
                        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;       //'东西    
                        break;
                    case EnumMousePointPosition.MouseSizeRight:
                        this.Cursor = Cursors.SizeWE;       //'东西    
                        break;
                    case EnumMousePointPosition.MouseSizeBottomLeft:
                        this.Cursor = Cursors.SizeNESW;     //'东北到南西    
                        break;
                    case EnumMousePointPosition.MouseSizeBottomRight:
                        this.Cursor = Cursors.SizeNWSE;     //'东南到西北    
                        break;
                    case EnumMousePointPosition.MouseSizeTopLeft:
                        this.Cursor = Cursors.SizeNWSE;     //'东南到西北    
                        break;
                    case EnumMousePointPosition.MouseSizeTopRight:
                        this.Cursor = Cursors.SizeNESW;     //'东北到南西    
                        break;
                    default:
                        break;
                        #endregion
                }
            }
        }
        protected override void OnResize(EventArgs eventargs)
        {
            if (CurrentTemplateInfo != null)
            {
                CurrentTemplateInfo.Width = Size.Width;
                CurrentTemplateInfo.Height = Size.Height;
                Invalidate();
            }
        }
        protected override void OnDragEnter(DragEventArgs drgevent)
        {
            drgevent.Effect = DragDropEffects.Copy;
            base.OnDragEnter(drgevent);
        }
        protected override void OnDragDrop(DragEventArgs drgevent)
        {
            try
            {
                string[] strs = (string[])drgevent.Data.GetData(typeof(string[])); //获取拖拽数据
                PictureBox ctrl = null;
                #region 实例化元素控件
                switch (strs.FirstOrDefault())
                {
                    case "Barcode":
                        ctrl = new BarcodePictureBox();
                        break;
                    case "Image":
                        ctrl = new ImagePictureBox();
                        break;
                    case "Text":
                        ctrl = new StaticTextBox();
                        break;
                    default:
                        break;
                }
                #endregion
                ctrl.Location = PointToClient(new Point(drgevent.X, drgevent.Y)); //屏幕坐标转换成控件容器坐标 
                ctrl.BringToFront();
                Controls.Add(ctrl);
            }
            catch (Exception ex)
            {
                string msg = "初始化控件出错！错误码：" + ex.Message + Environment.NewLine + ex.StackTrace;
                MessageTip.ShowError(this, msg, 3000);
            }
            base.OnDragDrop(drgevent);
        }
    }

整体上来说就是GDI+的使用，其中用了Base64编码来序列化图片。

3)对象序列化成XML

使用的是标准的方式：

/// <summary>
        /// 把对象序列化成xml文件
        /// </summary>
        /// <typeparam name="T">对象的类</typeparam>
        /// <param name="outFile">输出的文件和路径</param>
        /// <param name="t">对象的实例</param>
        public static void SerializerToXML<T>(string outFile, T t) where T : class
        {
            using (System.IO.FileStream fs = new System.IO.FileStream(outFile, System.IO.FileMode.Create))
            {
                XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
                ns.Add("", "");
                XmlSerializer xs = new XmlSerializer(typeof(T));
                xs.Serialize(fs, t, ns);
                fs.Flush();
            }
        }

        /// <summary>
        /// 从XML文件反序列化成集合对象
        /// </summary>
        /// <typeparam name="T">对象</typeparam>
        /// <param name="inXMLFile">xml的文件，全路径</param>
        /// <returns>对象集合</returns>
        public static T LoadFromXML<T>(string inXMLFile) where T : class
        {
            var t = default(T);
            using (System.IO.FileStream fs = new System.IO.FileStream(inXMLFile, System.IO.FileMode.Open))
            {
                XmlSerializer xs = new XmlSerializer(typeof(T));
                t = (T)xs.Deserialize(fs);
                fs.Close();
            }
            return t;
        }

 /// <summary>
    /// 图形元素
    /// </summary>
    [Serializable]
    public class ImageElementNode : PropertyBase, IElementNodeData, INotifyPropertyChanged
    {
        protected PictureBoxSizeMode _PictureBoxSizeMode = PictureBoxSizeMode.StretchImage;
        [ChnProperty("缩放模式", "图片原始尺寸和元素大小不一致时需要对原始图片进行缩放，设置缩放模式。")]
        [Category("通用属性")]
        public PictureBoxSizeMode ImageBoxSizeMode
        {
            get { return _PictureBoxSizeMode; }
            set { _PictureBoxSizeMode = value; }
        }

        private Point _location;
        [ChnProperty("位置", "节点元素的在模板里的位置的坐标，鼠标选中节点即可以移动位置。")]
        [Category("通用属性")]
        public Point Location
        {
            get { return _location; }
            set { _location = value; }
        }

        private string _name;
        [ChnProperty("元素名称", "一般自动生成，不需要维护。")]
        [Category("通用属性")]
        [XmlAttribute("Name")]
        public string Name
        {
            get { return _name; }
            set { _name = value; NotifyPropertyChanged("Name"); }
        }

        [ChnProperty("元素节点类型", "模板元素节点类型,元素产生时根据添加时自动确定，设计时不要修改类型。"), Category("通用属性")]
        [XmlAttribute("NodeCategory")]
        public ElementNodeCategory NodeCategory
        {
            get { return ElementNodeCategory.静态文本; }
        }

        private ImageRoteType _roteDescription = ImageRoteType.正常;
        [ChnProperty("旋转角度", "变形的形态描述，比如顺时针旋转90度。"), Category("通用属性")]
        public ImageRoteType RoteDescription
        {
            get { return _roteDescription; }
            set { _roteDescription = value; NotifyPropertyChanged("RoteDescription"); }
        }

        private Size _size;
        [ChnProperty("元素大小", "包括高度和宽度，单位是像素。使用鼠标可调节大小，滚轮进行缩放。"), Category("通用属性")]
        public Size Size
        {
            get { return _size; }
            set { _size = value; }
        }

        [ChnProperty("静态表达式", @"可以从‘ProductName,ProductCode,ProductSpec,
                       CorpCode,BatchCode,LineCode,DepartCode,TeamCode,WorkerCode,
                       PackDate,ValidateDate,ProductFullName,CustomerCode,CustomerName’字段中获取值。"),
         Category("表达式")]
        public StaticMapProperty StaticMapProperty { get; set; }
        [ChnProperty("动态表达式", @"可以从‘Code,EncryptCode,ParentCode,CipherFieldCode,Seqence,
                                   VersionCode,VersionName,BatchCode,CorpCode,LineCode,PackDate,ProductCode,WorkPointInt,
                                   WorkPointAZ,Dynamic,’字段中获取值。"),
         Category("表达式")]
        public DynamicMapProperty DynamicMapProperty { get; set; }

        private string text;
        [ChnProperty("固定字符", "在不写任何表达式的情况下设置的固定字符"), Category("通用属性")]
        [XmlAttribute("Text")]
        public string Text
        {
            get { return text; }
            set { text = value; NotifyPropertyChanged("Text"); }
        }

        private string _动态内容;
        [ChnProperty("动态内容", @"格式：{PropertyName[(Start[,Length])]}[&Blank[(Length)]]&{PropertyName[(Start[,Length])]} 
                                    PropertyName：动态属性里的选项
                                    Start：动态属性对应内容的开始位置
                                    Length：截取内容的长度
                                    Blank：空格
                                    Length：空格的个数
                                    &：为分隔符
                                    设置此内容的时候，请务必小心，设置时系统不检测其值的合法性，在执行的时候可能会报错"), Category("表达式")]
        public string 动态内容
        {
            get { return _动态内容; }
            set { _动态内容 = value; NotifyPropertyChanged("动态内容"); }
        }
        [ChnProperty("图形数据", "Base64编码的图形数据，缩放后序列化的字节码。双击图像元素进行选择和预览。"), Category("图形属性")]

        private string _imageData;
        [Browsable(false)]
        public string BinaryData
        {
            get { return _imageData; }
            set { _imageData = value; NotifyPropertyChanged("BinaryData"); }
        }

        private string _formatString = string.Empty;
        [ChnProperty("格式掩码", "如yyyyMMdd,HH:MM:SS。"), Category("表达式")]
        public string FormatString
        {
            get
            {
                return _formatString;
            }
            set
            {
                _formatString = value;
                NotifyPropertyChanged("FormatString");
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        public Image GetElmentNodeImage(PrintData data)
        {
            if (string.IsNullOrEmpty(BinaryData))
                throw new Exception("图片元素没有绑定图片资源！");
            Bitmap bmp = new Bitmap(Size.Width-3, Size.Height-3);
            Graphics g = Graphics.FromImage(bmp);
            g.Clear(Color.White);
            g.SmoothingMode = SmoothingMode.HighQuality;
            byte[] arr = Convert.FromBase64String(BinaryData);
            using (MemoryStream ms = new MemoryStream(arr))
            {
                Bitmap tempBmp = new Bitmap(ms);
                using (PictureBox pb = new PictureBox())
                {
                    pb.Size = Size;
                    pb.SizeMode = ImageBoxSizeMode;
                    pb.Image = tempBmp;
                    return ImageRote.RoteImage(RoteDescription, pb.Image);
                } 
            } 
        }

        private void NotifyPropertyChanged(string property)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(property));
        }

        public ImageElementNode()
        {
            StaticMapProperty = StaticMapProperty.None;
            DynamicMapProperty = DynamicMapProperty.None;
            动态内容 = "";
        } 
    }

4)GDI+Windows驱动打印

/// <summary>
    /// GDI Printer驱动类
    /// </summary>
    public class CoolGDIPrinter : WindowsVirtualPrinter
    {
        protected PrintDocument printDocument;
        protected Dictionary<string, TemplateItemInfo> dict = new Dictionary<string, TemplateItemInfo>();
        private object printSync = new object();
        private string templateFile = AppDomain.CurrentDomain.BaseDirectory + "Config\\GDITemplate.Config";
        private string current_data = string.Empty;
        private PrintData pd = null;
        private string current_Template = string.Empty;
        public CoolGDIPrinter(HardwarePort port, ILog log) : base(port, log)
        {
            if (!System.IO.File.Exists(templateFile))
            {
                throw new Exception(string.Format("模板文件{0}不存在！", templateFile));
            }
            DataList<TemplateItemInfo> list = WinFormHelper.LoadFromXML<DataList<TemplateItemInfo>>(templateFile);
            if (list != null && list.Count > 0)
            {
                foreach (TemplateItemInfo template in list)
                {
                    dict.Add(template.Code, template);
                }
            }
            if (string.IsNullOrEmpty(port.PortName))
            {
                throw new Exception("打印机名称不能为空！");
            }
            var findPrinter = GetAllLocalPrinters().Find(obj => obj.Contains(port.PortName));
            if (string.IsNullOrEmpty(findPrinter))
            {
                throw new Exception(string.Format("本地没有打印机{0},请检查打印机驱动是否正确安装。", port.PortName));
            }
            if (dict.Count == 0)
            {
                throw new Exception(string.Format("模板文件{0}内容为空，或者格式不符！", templateFile));
            }
            #region PrintDocument
            printDocument = new PrintDocument
            {
                PrinterSettings =
                {
                    PrinterName = PortName,
                }
            };
            printDocument.PrintController = new StandardPrintController();
            printDocument.BeginPrint += PrintDocument_BeginPrint;
            printDocument.PrintPage += PrintDocument_PrintPage;
            printDocument.EndPrint += PrintDocument_EndPrint;
            #endregion
            var isvali = printDocument.PrinterSettings.IsValid;
            if (!isvali)
            {
                throw new Exception(string.Format("没有指定有效的打印机,{0}不可用！", PortName));
            }           
        }
        /// <summary>
        /// 获取本机所有打印机列表
        /// </summary>
        /// <returns>本机所有打印机列表</returns>
        private List<string> GetAllLocalPrinters()
        {
            var fPrinters = new List<string>();
            foreach (string fPrinterName in PrinterSettings.InstalledPrinters)
            {
                if (!fPrinters.Contains(fPrinterName))
                {
                    fPrinters.Add(fPrinterName);
                }
            }
            return fPrinters;
        }
        /// <summary>
        /// 获取打印机的当前状态
        /// </summary>
        /// <param name="PrinterDevice">打印机设备名称</param>
        /// <returns>打印机状态</returns>
        private PrinterStatus GetPrinterStat(string PrinterDevice)
        {
            PrinterStatus ret = 0;
            string path = @"win32_printer.DeviceId='" + PrinterDevice + "'";
            ManagementObject printerMgrObj = new ManagementObject(path);
            printerMgrObj.Get();
            ret = (PrinterStatus)Convert.ToInt32(printerMgrObj.Properties["PrinterStatus"].Value);
            return ret;
        }
        /// <summary>
        /// WMI检测指定的打印机是否可用
        /// </summary>
        /// <param name="printerNameIn">指定的打印机名称</param>
        /// <returns></returns>
        protected bool CheckPrinter(string printerNameIn)
        {
            var scope = new ManagementScope(@"\root\cimv2");
            scope.Connect();
            ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_Printer");
            string printerName = "";
            foreach (ManagementObject printer in searcher.Get())
            {
                printerName = printer["Name"].ToString().ToLower();
                if (printerName.IndexOf(printerNameIn.ToLower()) > -1)
                {
                    if (printer["WorkOffline"].ToString().ToLower().Equals("true"))
                    {
                        return false;
                    }
                    else
                    {
                        return true;
                    }
                }
            }
            return false;
        }

        private object printlock = new object();
        /// <summary>
        /// 内部执行打印
        /// </summary>
        /// <param name="data"></param>
        /// <param name="templateKey"></param>
        protected override void WritePrinter(PrintData data, string templateKey)
        {
            var template = dict[templateKey];
            if (template == null)
            {
                throw new Exception(string.Format("不存在打印机模板[{0}]的配置文件", templateKey));
            }
            lock (printlock)
            {
                try
                {
                    printDocument.PrinterSettings.Copies = (short)template.Quantity;
                    printDocument.PrinterSettings.DefaultPageSettings.PaperSize = new PaperSize("GDI_LableSize", template.Width + 2, template.Height + 2);
                    printDocument.OriginAtMargins = true;
                    printDocument.DefaultPageSettings.Margins = new Margins(2, 2, 2, 2);
                    var printerIsonline = CheckPrinter(printDocument.PrinterSettings.PrinterName);
                    if (!printerIsonline)
                    {
                        RaiseException(new Exception(string.Format("打印机状态{0},请稍候进行打印!", "离线，请检查打印机是否正常开启")));
                        return;
                    }
                    current_data = data.Code;
                    pd = data;
                    current_Template = templateKey;
                    PostData(data);
                    printDocument.Print();
                }
                catch (Exception ex)
                {
                    RaiseReceived(ex, null);
                    RaiseException(new Exception(current_data + "打印失败，原因：" + ex.Message));
                }
            }
        }
        /// <summary>
        /// 外部调用驱动程序，发送打印数据
        /// </summary>
        /// <param name="data">打印数据</param>
        /// <param name="templateKey">模板键</param>
        public override void WriteData(PrintData data, string templateKey)
        {
            base.WriteData(data, templateKey);
            IsPrinting = true;
            WritePrinter(data, templateKey);
            IsPrinting = false;
        }
        /// <summary>
        /// 启动生成标签图形
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void PrintDocument_BeginPrint(object sender, PrintEventArgs e)
        {
            Log.Info(string.Format("开始打印数据:[{0}],[{1}]", PortName, current_data));
        }
        /// <summary>
        /// 执行标签图形生成产生画布
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void PrintDocument_PrintPage(object sender, PrintPageEventArgs e)
        {
            lock (printSync)
            {
                try
                {
                    var imgData = BuildTemplateImage(pd, current_Template);
                    if (imgData != null)
                    {
                        e.Graphics.SmoothingMode = SmoothingMode.HighQuality;
                        e.Graphics.DrawImage(imgData, 0, 0, imgData.Width, imgData.Height);
                        if (IsDebug)
                        {
                            string debugPath = AppDomain.CurrentDomain.BaseDirectory + "output";
                            if (!System.IO.Directory.Exists(debugPath))
                            {
                                System.IO.Directory.CreateDirectory(debugPath);
                            }
                            string bmpFile = System.IO.Path.Combine(debugPath, current_data + DateTime.Now.Ticks + ".PNG");
                            imgData.Save(bmpFile, ImageFormat.Png);
                        }
                    }
                }
                catch (Exception ex)
                {
                    Log.Error(ex);
                    throw new Exception("构建标签图形失败,错误描述:" + ex.Message + Environment.NewLine + ex.StackTrace);
                }
            }
        }
        /// <summary>
        /// 结束打印绘图，发送给打印机打印数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void PrintDocument_EndPrint(object sender, PrintEventArgs e)
        {
            Log.Info(string.Format("[{0}],[{1}],发送打印数据完成", PortName, current_data));
        }
        /// <summary>
        /// 内部通过模板生成图形
        /// </summary>
        /// <param name="data"></param>
        /// <param name="templateKey"></param>
        /// <returns></returns>
        protected override Bitmap BuildTemplateImage(PrintData data, string templateKey)
        {
            var template = dict[templateKey];
            Bitmap bmp = new Bitmap(template.Width, template.Height);
            Graphics graphics = Graphics.FromImage(bmp);
            graphics.SmoothingMode = SmoothingMode.HighQuality;
            graphics.Clear(Color.White);
            //1、画图片元素节点
            foreach (var bmpElement in template.ImageElementList)
            {
                Rectangle rect = new Rectangle(bmpElement.Location.X, bmpElement.Location.Y, bmpElement.Size.Width, bmpElement.Size.Height);
                graphics.DrawImage(bmpElement.GetElmentNodeImage(data), rect);
            }
            //2、画条码元素节点
            foreach (var barcodeElement in template.BarcodeElementList)
            {
                Rectangle rect = new Rectangle(barcodeElement.Location.X, barcodeElement.Location.Y, barcodeElement.Size.Width, barcodeElement.Size.Height);
                graphics.DrawImage(barcodeElement.GetElmentNodeImage(data), rect);
            }
            //3、画静态文本元素节点
            foreach (var txtElement in template.TextBoxList)
            {
                Rectangle rect = new Rectangle(txtElement.Location.X, txtElement.Location.Y, txtElement.Size.Width, txtElement.Size.Height);
                graphics.DrawImage(txtElement.GetElmentNodeImage(data), rect);
            }
            return bmp;
        }
    }

PrintDocument对象就是对打印机画布进行的封装，主要就是GDI+的操作了。

成果物