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图片绘制顺序,怎样先绘制文字在绘制图片? RRS feed

  • 问题

  • 前面的是条形码绘制,是一个类test.MyImage.BandCode.cs
    using System;
    using System.Collections;
    using System.ComponentModel;
    using System.Drawing;
    using System.Data;
    
     
    
    namespace test.test.MyImage.BandCode
    {
        /// <summary>
        /// Code39编码 
        /// </summary>
        public class Code39
        {
            private Hashtable m_Code39 = new Hashtable();
    
            private byte m_Magnify = 0;
            /// <summary>
            /// 放大倍数
            /// </summary>
            public byte Magnify { get { return m_Magnify; } set { m_Magnify = value; } }
    
            private int m_Height = 40;
            /// <summary>
            /// 图形高
            /// </summary>
            public int Height { get { return m_Height; } set { m_Height = value; } }
    
            private Font m_ViewFont = null;
            /// <summary>
            /// 字体大小
            /// </summary>
            public Font ViewFont { get { return m_ViewFont; } set { m_ViewFont = value; } }
    
     
    
            public Code39()
            {
    
                m_Code39.Add("A", "1101010010110");
                m_Code39.Add("B", "1011010010110");
                m_Code39.Add("C", "1101101001010");
                m_Code39.Add("D", "1010110010110");
                m_Code39.Add("E", "1101011001010");
                m_Code39.Add("F", "1011011001010");
                m_Code39.Add("G", "1010100110110");
                m_Code39.Add("H", "1101010011010");
                m_Code39.Add("I", "1011010011010");
                m_Code39.Add("J", "1010110011010");
                m_Code39.Add("K", "1101010100110");
                m_Code39.Add("L", "1011010100110");
                m_Code39.Add("M", "1101101010010");
                m_Code39.Add("N", "1010110100110");
                m_Code39.Add("O", "1101011010010");
                m_Code39.Add("P", "1011011010010");
                m_Code39.Add("Q", "1010101100110");
                m_Code39.Add("R", "1101010110010");
                m_Code39.Add("S", "1011010110010");
                m_Code39.Add("T", "1010110110010");
                m_Code39.Add("U", "1100101010110");
                m_Code39.Add("V", "1001101010110");
                m_Code39.Add("W", "1100110101010");
                m_Code39.Add("X", "1001011010110");
                m_Code39.Add("Y", "1100101101010");
                m_Code39.Add("Z", "1001101101010");
                m_Code39.Add("0", "1010011011010");
                m_Code39.Add("1", "1101001010110");
                m_Code39.Add("2", "1011001010110");
                m_Code39.Add("3", "1101100101010");
                m_Code39.Add("4", "1010011010110");
                m_Code39.Add("5", "1101001101010");
                m_Code39.Add("6", "1011001101010");
                m_Code39.Add("7", "1010010110110");
                m_Code39.Add("8", "1101001011010");
                m_Code39.Add("9", "1011001011010");
                m_Code39.Add("+", "1001010010010");
                m_Code39.Add("-", "1001010110110");
                m_Code39.Add("*", "1001011011010");
                m_Code39.Add("/", "1001001010010");
                m_Code39.Add("%", "1010010010010");
                m_Code39.Add("contentquot", "1001001001010");
                m_Code39.Add(".", "1100101011010");
                m_Code39.Add(" ", "1001101011010");
    
            }
    
    
            public enum Code39Model
            {
                /// <summary>
                /// 基本类别 1234567890ABC
                /// </summary>
                Code39Normal,
                /// <summary>
                /// 全ASCII方式 +A+B 来表示小写
                /// </summary>
                Code39FullAscII
            }
            /// <summary>
            /// 获得条码图形
            /// </summary>
            /// <param name="p_Text">文字信息</param>
            /// <param name="p_Model">类别</param>
            /// <param name="p_StarChar">是否增加前后*号</param>
            /// <returns>图形</returns>
            public Bitmap GetCodeImage(Code39Model p_Model, string p_Text, bool p_StarChar)
            {
                string _ValueText = "";
                string _CodeText = "";
                char[] _ValueChar = null;
                switch (p_Model)
                {
                    case Code39Model.Code39Normal:
                        _ValueText = p_Text.ToUpper();
                        break;
                    default:
                        _ValueChar = p_Text.ToCharArray();
                        for (int i = 0; i != _ValueChar.Length; i++)
                        {
                            if ((int)_ValueChar[i] >= 97 && (int)_ValueChar[i] <= 122)
                            {
                                _ValueText += "+" + _ValueChar[i].ToString().ToUpper();
    
                            }
                            else
                            {
                                _ValueText += _ValueChar[i].ToString();
                            }
                        }
                        break;
                }
    
    
                _ValueChar = _ValueText.ToCharArray();
    
                if (p_StarChar == true) _CodeText += m_Code39["*"];
    
                for (int i = 0; i != _ValueChar.Length; i++)
                {
                    if (p_StarChar == true && _ValueChar[i] == '*') throw new Exception("带有起始符号不能出现*");
    
                    object _CharCode = m_Code39[_ValueChar[i].ToString()];
                    if (_CharCode == null) throw new Exception("不可用的字符" + _ValueChar[i].ToString());
                    _CodeText += _CharCode.ToString();
                }
    
    
                if (p_StarChar == true) _CodeText += m_Code39["*"];
    
    
                Bitmap _CodeBmp = GetImage(_CodeText);
                GetViewImage(p_Text, _CodeBmp);
                return _CodeBmp;
            }
    
    
            /// <summary>
            /// 绘制文字
            /// </summary>
            /// <param name="p_CodeImage">图形</param>
            /// <param name="p_Text">文字</param>
            private void GetViewImage(string p_Text, Bitmap p_CodeImage)
            {
                if (m_ViewFont == null) return;
                Graphics _Graphics = Graphics.FromImage(p_CodeImage);
                SizeF _FontSize = _Graphics.MeasureString(p_Text, m_ViewFont);
    
                if (_FontSize.Width > p_CodeImage.Width || _FontSize.Height > p_CodeImage.Height - 20)
                {
                    _Graphics.Dispose();
                    return;
                }
                int _StarHeight = p_CodeImage.Height - (int)_FontSize.Height;
    
                _Graphics.FillRectangle(Brushes.White, new Rectangle(0, _StarHeight, p_CodeImage.Width, (int)_FontSize.Height));
    
                int _StarWidth = (p_CodeImage.Width - (int)_FontSize.Width) / 2;
    
                _Graphics.DrawString(p_Text, m_ViewFont, Brushes.Black, _StarWidth, _StarHeight);
    
                _Graphics.Dispose();
    
            }
    
    
            /// <summary>
            /// 绘制编码图形
            /// </summary>
            /// <param name="p_Text">编码</param>
            /// <returns>图形</returns>
            private Bitmap GetImage(string p_Text)
            {
                char[] _Value = p_Text.ToCharArray();
    
    
                //宽 == 需要绘制的数量*放大倍数 + 两个字的宽   
                Bitmap _CodeImage = new Bitmap(_Value.Length * ((int)m_Magnify + 1), (int)m_Height);
                Graphics _Garphics = Graphics.FromImage(_CodeImage);
    
                _Garphics.FillRectangle(Brushes.White, new Rectangle(0, 0, _CodeImage.Width, _CodeImage.Height));
    
                int _LenEx = 0;
                for (int i = 0; i != _Value.Length; i++)
                {
                    int _DrawWidth = m_Magnify + 1;
                    if (_Value[i] == '1')
                    {
                        _Garphics.FillRectangle(Brushes.Black, new Rectangle(_LenEx, 0, _DrawWidth, m_Height));
    
                    }
                    else
                    {
                        _Garphics.FillRectangle(Brushes.White, new Rectangle(_LenEx, 0, _DrawWidth, m_Height));
                    }
                    _LenEx += _DrawWidth;
                }
    
    
    
                _Garphics.Dispose();
                return _CodeImage;
            }
    
    
        }
    
    }


    • 已编辑 彭123 2012年7月29日 7:15
    2012年7月29日 7:13

答案

  •   如果不显示文字,你把下面这行代码的参数设置为空就可以了

            System.Drawing.Image _CodeImage = _Code39.GetCodeImage(Code39.Code39Model.Code39Normal, "              ", true);


    http://blog.csdn.net/zx13525079024

    2012年7月31日 6:43

全部回复

  • 后面的是引用。

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Collections;
    using System.ComponentModel;
    using System.Drawing;
    using System.Data;
    
    public partial class Default2 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
           test.test.MyImage.BandCode.Code39 _Code39 = new test.test.MyImage.BandCode.Code39();
            
            _Code39.Height = 40;
            _Code39.Magnify = 0;
            _Code39.ViewFont = new Font("Arial", 7);
    
    
            System.Drawing.Image _CodeImage = _Code39.GetCodeImage(test.test.MyImage.BandCode.Code39.Code39Model.Code39Normal, "123ABC4567890FWF", true);
    
            System.IO.MemoryStream _Stream = new System.IO.MemoryStream();
            _CodeImage.Save(_Stream, System.Drawing.Imaging.ImageFormat.Jpeg);
            _CodeImage.Save(@"C:\1.jpeg");
            _CodeImage.Save(@"C:\1.BMP");
            _CodeImage.Save(@"C:\1.GIF");
    
            Response.ContentType = "image/jpeg";
            Response.Clear();
            Response.BufferOutput = true;
            Response.BinaryWrite(_Stream.GetBuffer());
            Response.Flush();
        }
    
    }

    2012年7月29日 7:13
  • 还有一个问题,请问如果不要文字应该怎么做呢???
    2012年7月29日 7:19
  •   如果不显示文字,你把下面这行代码的参数设置为空就可以了

            System.Drawing.Image _CodeImage = _Code39.GetCodeImage(Code39.Code39Model.Code39Normal, "              ", true);


    http://blog.csdn.net/zx13525079024

    2012年7月31日 6:43