将 windows 窗体转换为 pdf 文件答案

【问题标题】：convert windows form to pdf file将 windows 窗体转换为 pdf 文件
【发布时间】：2011-06-16 08:20:47
【问题描述】：

如何将 Windows 表单转换为与表单相同设计的 pdf（pdf 文档）格式

【问题讨论】：

【解决方案1】：

我对此进行了测试，它可以工作。我不喜欢它创建一个临时文件的事实。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using System.IO;

namespace WindowsFormsApplication4
{
    public partial class Form1 : Form
    {
        private System.IO.Stream streamToPrint;

        string streamType;

        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        private static extern bool BitBlt
        (
            IntPtr hdcDest, // handle to destination DC
            int nXDest, // x-coord of destination upper-left corner
            int nYDest, // y-coord of destination upper-left corner
            int nWidth, // width of destination rectangle
            int nHeight, // height of destination rectangle
            IntPtr hdcSrc, // handle to source DC
            int nXSrc, // x-coordinate of source upper-left corner
            int nYSrc, // y-coordinate of source upper-left corner
            System.Int32 dwRop // raster operation code
        );


        private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            System.Drawing.Image image = System.Drawing.Image.FromStream(this.streamToPrint);

            int x = e.MarginBounds.X;
            int y = e.MarginBounds.Y;

            int width = image.Width;
            int height = image.Height;
            if ((width / e.MarginBounds.Width) > (height / e.MarginBounds.Height))
            {
                width = e.MarginBounds.Width;
                height = image.Height * e.MarginBounds.Width / image.Width;
            }
            else
            {
                height = e.MarginBounds.Height;
                width = image.Width * e.MarginBounds.Height / image.Height;
            }
            System.Drawing.Rectangle destRect = new System.Drawing.Rectangle(x, y, width, height);
            e.Graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, System.Drawing.GraphicsUnit.Pixel);
        }


        private void button1_Click(object sender, EventArgs e)
        {
            String filename = System.IO.Path.GetTempFileName();

            Graphics g1 = this.CreateGraphics();
            Image MyImage = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height, g1);
            Graphics g2 = Graphics.FromImage(MyImage);
            IntPtr dc1 = g1.GetHdc();
            IntPtr dc2 = g2.GetHdc();
            BitBlt(dc2, 0, 0, this.ClientRectangle.Width, this.ClientRectangle.Height, dc1, 0, 0, 13369376);
            g1.ReleaseHdc(dc1);
            g2.ReleaseHdc(dc2);
            MyImage.Save(filename, ImageFormat.Png);
            FileStream fileStream = new FileStream(filename, FileMode.Open, FileAccess.Read);
            StartPrint(fileStream, "Image");
            fileStream.Close();
            if (System.IO.File.Exists(filename))
            {
                System.IO.File.Delete(filename);
            }
        }

        public void StartPrint(Stream streamToPrint, string streamType)
        {

            this.printDocument1.PrintPage += new PrintPageEventHandler(printDocument1_PrintPage);

            this.streamToPrint = streamToPrint;

            this.streamType = streamType;

            System.Windows.Forms.PrintDialog PrintDialog1 = new PrintDialog();

            PrintDialog1.AllowSomePages = true;
            PrintDialog1.ShowHelp = true;
            PrintDialog1.Document = printDocument1;
            DialogResult result = PrintDialog1.ShowDialog();
            if (result == DialogResult.OK)
            {
                printDocument1.Print();
            }
        }

        public Form1()
        {
            InitializeComponent();
        }

    }

}

【讨论】：

如果安装了 pdf 打印机，那么它会给我空白的 pdf 文件
如果表单很长，这将不起作用，我的意思是如果它有滚动条，因为它会捕获屏幕

【解决方案2】：

这可能是之前提出的相同问题，并且对此问题有一些有用的建议：Save WinForm to PDF & print multipage WinForm

【讨论】：

【解决方案3】：

看看这个问题（我已经回答过），因为你的问题看起来很相似：

How Can i Print Array of Images in Winform App in c#

希望这会有所帮助。

【讨论】：