C#:图片加上文字水印（书法印章生成）

﹏ヽ暗。殇╰゛Y 2022-02-25 13:38 405阅读 0赞

using System;
    using System.Collections.Generic;
    using System.Drawing;
    using System.Drawing.Imaging;
    using System.IO;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;
    namespace TextToPng
    {
        class Program
        {
            static void Main(string[] args)
            {
    
                if (args != null && args.Length > 0)
                {
                    PngAddText(AppDomain.CurrentDomain.BaseDirectory + @"kuang.png", args[0]);
                }
                else {
                    PngAddText(AppDomain.CurrentDomain.BaseDirectory + @"kuang.png", "立羽");
                }
    
                Console.WriteLine("SaveImgOK");
            }
    
            
    
            /// <summary>
            /// 图片上嵌入文字
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            static void PngAddText(string imgPath,string text)
            {
                try
                {
                    System.Drawing.Image imgSrc = System.Drawing.Image.FromFile(imgPath);
    
                    if (text.Length < 4)
                    {
                        text += "印";
                    }
                    float x = 0;
                    float y = 0;
    
                    float xOffset = 20;
                    using (Graphics g = Graphics.FromImage(imgSrc))
                    {
                        g.DrawImage(imgSrc, 0, 0, imgSrc.Width, imgSrc.Height);
                        using (Font f = new Font("楷体", 65, FontStyle.Bold))
                        {
                            using (Brush b = new SolidBrush(Color.Red))
                            {
                                for (int i = 0; i < text.Length; i++)
                                {
                                    switch (i)
                                    {
                                        case 0:
                                            x = imgSrc.Width / 2 - xOffset;
                                            y = xOffset;
                                            break;
                                        case 1:
                                            x = imgSrc.Width / 2 - xOffset;
                                            y = imgSrc.Height / 2;
                                            break;
                                        case 2:
                                            if (text.Length == 4)
                                            {
                                                x = 0;
                                                y = xOffset;
                                            }
                                            else if (text.Length == 3)
                                            {
                                                x = 0;
                                                y = imgSrc.Height / 2 - 65 / 2.0f;
                                            }
                                            break;
                                        case 3:
                                            x = 0;
                                            y = imgSrc.Height / 2;
                                            break;
                                        default:
                                            break;
                                    }
    
                                    g.DrawString(text[i].ToString(), f, b, x, y);
                                }
                            }
                        }
                    }
                    string fontpath = AppDomain.CurrentDomain.BaseDirectory + @"save.png";
                    imgSrc.Save(fontpath, System.Drawing.Imaging.ImageFormat.Png);
                }
                catch (Exception e)
                {
                    MessageBox.Show(e.ToString());
                  
                }
            }
        }
    }

![在这里插入图片描述][20190402092835237.png]

[20190402092835237.png]: /images/20220225/ea0aab1cd8c94201a391d52fe71e1c82.png