form实现pdf文件转换成jpg文件

说明：
我希望将pdf文件转换成jpg文件
请去下载并安装 Ghostscript，gs10050w64.exe
配置环境变量：D:\Program Files\gs\gs10.05.0\bin
本地pdf路径：C:\Users\wangrusheng\Documents\name.pdf
输出文件目录：C:\Users\wangrusheng\Documents\PdfToJpgOutput
效果图:

step1:C:\Users\wangrusheng\RiderProjects\WinFormsApp18\WinFormsApp18\Form1.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Threading.Tasks;
using System.Windows.Forms;namespace WinFormsApp18
{public partial class Form1 : Form{// 固定PDF路径配置 C:\Users\wangrusheng\Documentspublic const string FixedPdfPath = @"C:\Users\wangrusheng\Documents\age.pdf";private string _currentTempDir;// UI控件private TextBox txtSaveDir;private NumericUpDown numStartPage;private NumericUpDown numEndPage;private ComboBox cmbQuality;private CheckBox chkMerge;private ComboBox cmbOrientation;public Form1(){InitializeComponent();InitializeComponents();LoadSettings();}private void InitializeComponents(){// 固定PDF路径显示var lblFile = new Label{Text = "PDF文件路径:",Location = new Point(20, 20),AutoSize = true};var txtFixedPath = new TextBox{Text = FixedPdfPath,Location = new Point(120, 17),Width = 400,ReadOnly = true,BackColor = SystemColors.Window};// 保存目录区域var lblSaveDir = new Label{Text = "保存目录:",Location = new Point(20, 60),AutoSize = true};txtSaveDir = new TextBox{Text = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments),"PdfToJpgOutput"),Location = new Point(120, 57),Width = 400,ReadOnly = true};var btnSelectDir = new Button{Text = "浏览...",Location = new Point(530, 55),AutoSize = true};btnSelectDir.Click += BtnSelectDir_Click;// 页码选择var lblPages = new Label{Text = "页码范围:",Location = new Point(20, 100),AutoSize = true};numStartPage = new NumericUpDown{Location = new Point(120, 97),Minimum = 1,Maximum = 10000};numEndPage = new NumericUpDown{Location = new Point(220, 97),Minimum = 0,Maximum = 10000};// 质量选择var lblQuality = new Label{Text = "输出质量:",Location = new Point(20, 140),AutoSize = true};cmbQuality = new ComboBox{Location = new Point(120, 137),Items = { "300", "400", "500", "600" },SelectedIndex = 2};// 合并选项chkMerge = new CheckBox{Text = "合并为单文件",Location = new Point(20, 180),AutoSize = true};cmbOrientation = new ComboBox{Location = new Point(120, 177),Items = { "垂直拼接", "水平拼接" },SelectedIndex = 0};// 操作按钮var btnRun = new Button{Text = "开始转换",Location = new Point(20, 220),AutoSize = true};btnRun.Click += BtnRun_Click;// 添加所有控件Controls.AddRange(new Control[]{lblFile, txtFixedPath,lblSaveDir, txtSaveDir, btnSelectDir,lblPages, numStartPage, numEndPage,lblQuality, cmbQuality,chkMerge, cmbOrientation,btnRun});}private void BtnSelectDir_Click(object sender, EventArgs e){using var dialog = new FolderBrowserDialog{SelectedPath = txtSaveDir.Text,Description = "选择保存目录"};if (dialog.ShowDialog() == DialogResult.OK){if (FileHelper.ValidatePath(dialog.SelectedPath)){txtSaveDir.Text = dialog.SelectedPath;}else{MessageBox.Show("选择的目录路径无效");}}}private async void BtnRun_Click(object sender, EventArgs e){try{if (!ValidateInputs()) return;_currentTempDir = FileHelper.GetTempWorkspace();var result = await ConvertPdfToImagesAsync();if (result.Success){if (chkMerge.Checked){await MergeImagesAsync();}MoveFinalFiles();MessageBox.Show("转换成功完成");}else{throw new Exception(result.ErrorMessage);}}catch (Exception ex){MessageBox.Show($"操作失败: {ex.Message}");}finally{FileHelper.CleanTempFiles(_currentTempDir);}}private bool ValidateInputs(){if (!File.Exists(FixedPdfPath)){MessageBox.Show($"自动读取的PDF文件不存在：{FixedPdfPath}");return false;}if (numStartPage.Value > numEndPage.Value && numEndPage.Value != 0){MessageBox.Show("起始页码不能大于结束页码");return false;}return true;}private async Task<(bool Success, string ErrorMessage)> ConvertPdfToImagesAsync(){var args = new List<string>{"-dNOSAFER",$"-r{cmbQuality.SelectedItem}","-sDEVICE=jpeg","-dBATCH","-dNOPAUSE","-dEPSCrop",$"-dFirstPage={numStartPage.Value}",numEndPage.Value > 0 ? $"-dLastPage={numEndPage.Value}" : "",$"-sOutputFile={Path.Combine(_currentTempDir, "page_%d.jpg")}",$"\"{FixedPdfPath}\""};var (success, output) = FileHelper.ExecuteCommand("gswin64c", string.Join(" ", args), _currentTempDir);return (success, output);}private async Task MergeImagesAsync(){var args = $"{Path.Combine(_currentTempDir, "page_*.jpg")} " +$"{(cmbOrientation.SelectedIndex == 0 ? "-append" : "+append")} " +$"{Path.Combine(_currentTempDir, "merged.jpg")}";var (success, output) = FileHelper.ExecuteCommand("magick", args, _currentTempDir);if (!success) throw new Exception(output);}private void MoveFinalFiles(){var destDir = txtSaveDir.Text;Directory.CreateDirectory(destDir);var filesToMove = chkMerge.Checked? new[] { "merged.jpg" }: Directory.GetFiles(_currentTempDir, "page_*.jpg");foreach (var file in filesToMove){var destPath = Path.Combine(destDir, Path.GetFileName(file));File.Move(file, destPath, true);}}private void LoadSettings(){// 可添加其他配置加载逻辑numStartPage.Value = 1;numEndPage.Value = 0;}private void SaveSettings(){// 可添加配置保存逻辑}protected override void OnFormClosing(FormClosingEventArgs e){SaveSettings();base.OnFormClosing(e);}}
}

step2:C:\Users\wangrusheng\RiderProjects\WinFormsApp18\WinFormsApp18\FileHelper.cs

using System;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;namespace WinFormsApp18
{public static class FileHelper{private const string GhostscriptExeName = "gswin64c.exe";private static readonly string[] GhostscriptSearchPaths = {@"D:\Program Files\gs"};public static string GetTempWorkspace(){var tempDir = Path.Combine(Path.GetTempPath(),"PdfToJpg",DateTime.Now.ToString("yyyyMMdd_HHmmss"));Directory.CreateDirectory(tempDir);return tempDir;}public static bool ValidatePath(string path){try{var fullPath = Path.GetFullPath(path);if (path.IndexOfAny(Path.GetInvalidPathChars()) >= 0)return false;if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)){if (!fullPath.StartsWith(ApplicationInfo.AppRootPath, StringComparison.OrdinalIgnoreCase))return false;}else{if (!fullPath.StartsWith(ApplicationInfo.AppRootPath))return false;}return true;}catch{return false;}}public static (bool Success, string Output) ExecuteCommand(string command, string args, string workingDir){try{var fullCommandPath = command.Equals("gswin64c", StringComparison.OrdinalIgnoreCase)? FindGhostscriptPath(): command;if (fullCommandPath == null)throw new FileNotFoundException("Ghostscript not found. Please install from https://www.ghostscript.com/");var startInfo = new ProcessStartInfo{FileName = fullCommandPath,Arguments = args,WorkingDirectory = workingDir,UseShellExecute = false,RedirectStandardOutput = true,RedirectStandardError = true,CreateNoWindow = true};using var process = Process.Start(startInfo);var output = process.StandardOutput.ReadToEnd();var error = process.StandardError.ReadToEnd();if (!process.WaitForExit(30000))throw new TimeoutException("Process execution timed out");return (process.ExitCode == 0, $"Exit Code: {process.ExitCode}\nOutput:\n{output}\nErrors:\n{error}");}catch (Exception ex){return (false, ex.Message);}}private static string FindGhostscriptPath(){// Check if ghostscript is in PATHvar pathEnv = Environment.GetEnvironmentVariable("PATH") ?? "";foreach (var path in pathEnv.Split(Path.PathSeparator)){var fullPath = Path.Combine(path, GhostscriptExeName);if (File.Exists(fullPath))return fullPath;}// Search common installation directoriesforeach (var basePath in GhostscriptSearchPaths){if (!Directory.Exists(basePath)) continue;var versions = Directory.GetDirectories(basePath).OrderByDescending(d => d).ToList();foreach (var versionDir in versions){var exePath = Path.Combine(versionDir, "bin", GhostscriptExeName);if (File.Exists(exePath))return exePath;}}throw new FileNotFoundException($"Ghostscript executable ({GhostscriptExeName}) not found. " +"Please install from https://www.ghostscript.com/");}public static void CleanTempFiles(string tempDir){try{if (Directory.Exists(tempDir)){Directory.Delete(tempDir, true);}}catch (Exception ex){Debug.WriteLine($"Error cleaning temp files: {ex.Message}");}}}public static class ApplicationInfo{public static string AppRootPath => AppDomain.CurrentDomain.BaseDirectory;}
}

end