using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using PdfSharp;
using PdfSharp.Pdf;
using PdfSharp.Drawing;
using System.Diagnostics;

namespace AAA
{
    class Program
    {
        static void Main()
        {
            Creat(@"D:\HelloWorld_.pdf", "大连成光网络技术有限公司", "名称", "123456789123456789", "浦发银行", DateTime.Now);
        }


        public static void Creat(string filename, string companyName, string name, string cardid, string bank, DateTime data)
        {
            // 创建PDF文档
            PdfDocument document = new PdfDocument();
            document.Info.Title = "关于移动支付平台商户账号变更的说明";
            // 添加空白页
            PdfPage page = document.AddPage();
            // 获取画布
            XGraphics gfx = XGraphics.FromPdfPage(page);

            // 字体配置
            XPdfFontOptions options = new XPdfFontOptions(PdfFontEncoding.Unicode, PdfFontEmbedding.Always);
            System.Drawing.Text.PrivateFontCollection pfcFonts = new System.Drawing.Text.PrivateFontCollection();
            // 使用自定义字体
            string strFontPath = @".\Font\经典宋体简.TTF";// 字体设置为简宋
            pfcFonts.AddFontFile(strFontPath);
            // 定义两种大小字体
            XFont fontTitle = new XFont(pfcFonts.Families[0], 17, XFontStyle.Regular, options);
            XFont fontBody = new XFont(pfcFonts.Families[0], 14, XFontStyle.Regular, options);
            XFont fontUndline = new XFont(pfcFonts.Families[0], 14, XFontStyle.Underline, options);
            // 文档标题距离顶部距离
            int Pading = 50;
            int TopHeight = 50;
            int linePading = 7;
            int fontCount = ((int)page.Width - Pading * 2) / fontBody.Height; // 一行显示的字数
            string TitleString = "关于移动支付平台商户账号变更的说明";
            string line1 = "我公司通过与平安银行温州分行合作的移动支付业务入驻的商户";
            string line2 = "，因银行卡信息有误，导致用户无法收到结算款项，现申请将银行卡信息变更如下：";
            string[] lines = new string[] {
                "用户名：" + name,
                "银行账号：" + cardid,
                "开户行：" + bank,
                "请予以修正。"
            };

            // 标题
            gfx.DrawString(TitleString, fontTitle, XBrushes.Black, new XRect(0, TopHeight, page.Width, fontTitle.Height), XStringFormats.Center);
            // 换行
            TopHeight += fontBody.Height + 20;

            // 正文
            gfx.DrawString(line1, fontBody, XBrushes.Black, new XRect(Pading + fontBody.Height * 2, TopHeight, page.Width - Pading, fontBody.Height), XStringFormats.TopLeft);
            int leftCount = fontCount - line1.Length - 2;// 剩余能够显示的字数
            int leftWidth = leftCount * fontBody.Height;
            // 公司名称显示后，该行有空余空间
            if (companyName.Length < leftCount)
            {
                int subLength = leftCount - companyName.Length;
                string subline2 = line2.Substring(0, subLength);
                line2 = line2.Replace(subline2, "");
                gfx.DrawString(companyName, fontUndline, XBrushes.Black, new XRect(page.Width - Pading - leftWidth, TopHeight, leftWidth, fontBody.Height), XStringFormats.TopLeft);
                gfx.DrawString(subline2, fontBody, XBrushes.Black, new XRect(page.Width - Pading - subLength * fontBody.Height, TopHeight, leftWidth, fontBody.Height), XStringFormats.TopLeft);
                // 换行
                TopHeight += fontBody.Height + linePading;
                gfx.DrawString(line2, fontBody, XBrushes.Black, new XRect(Pading, TopHeight, page.Width - Pading, fontBody.Height), XStringFormats.TopLeft);
            }
            else // 公司名称较长导致换行显示的情况
            {
                string subCompany = companyName.Substring(0, leftCount);
                int subLength = companyName.Length - subCompany.Length;

                gfx.DrawString(subCompany, fontUndline, XBrushes.Black, new XRect(page.Width - Pading - leftWidth, TopHeight, leftWidth, fontBody.Height), XStringFormats.TopLeft);
                // 换行
                TopHeight += fontBody.Height + linePading;
                gfx.DrawString(companyName.Replace(subCompany, ""), fontUndline, XBrushes.Black, new XRect(Pading, TopHeight, leftWidth, fontBody.Height), XStringFormats.TopLeft);
                string subline2 = line2.Substring(0, fontCount - subLength);

                gfx.DrawString(subline2, fontBody, XBrushes.Black, new XRect(Pading + subLength * fontBody.Height, TopHeight, leftWidth, fontBody.Height), XStringFormats.TopLeft);
                line2 = line2.Replace(subline2, "");
                // 换行
                TopHeight += fontBody.Height + linePading;
                gfx.DrawString(line2, fontBody, XBrushes.Black, new XRect(Pading, TopHeight, page.Width - Pading, fontBody.Height), XStringFormats.TopLeft);
            }

            // 变更信息
            for (int i = 0; i < lines.Length; i++)
            {
                // 换行
                TopHeight += fontBody.Height + linePading;
                gfx.DrawString(lines[i], fontBody, XBrushes.Black, new XRect(Pading * 2, TopHeight, page.Width - Pading, fontBody.Height), XStringFormats.TopLeft);
            }

            // 换行
            TopHeight += fontBody.Height + 20;
            TopHeight += fontBody.Height + 20;
            gfx.DrawString("公司（盖章）", fontBody, XBrushes.Black, new XRect(page.Width - Pading * 4, TopHeight, page.Width, fontBody.Height), XStringFormats.TopLeft);
            TopHeight += fontBody.Height + 5;
            gfx.DrawString("日期 " + data.ToString("yyy-MM-dd"), fontBody, XBrushes.Black, new XRect(page.Width - Pading * 4, TopHeight, page.Width, fontBody.Height), XStringFormats.TopLeft);

            // 印章
            XImage img = XImage.FromFile(@".\File\seal.gif");
            gfx.DrawImage(img, new System.Drawing.Point() { X = 400, Y = 250 });

            // Save the document...
            document.Save(filename);
            Process.Start(filename);
        }
    }
}