您可以使用System.Diagnostics.Process.Start以及WIN32 ShellExecute函数interop，用于使用默认查看器打开 PDF 文件:

you can use System.Diagnostics.Process.Start as well as WIN32 ShellExecute function by means of interop, for opening PDF files using the default viewer:

System.Diagnostics.Process.Start("SOMEAPP.EXE","Path/SomeFile.Ext");

[System.Runtime.InteropServices.DllImport("shell32. dll")]
private static extern long ShellExecute(Int32 hWnd, string lpOperation, 
                                    string lpFile, string lpParameters, 
                                        string lpDirectory, long nShowCmd);

另一种方法是将 WebBrowser Control 放入您的表单中，然后使用 Navigate 方法打开 PDF 文件:

Another approach is to place a WebBrowser Control into your Form and then use the Navigate method for opening the PDF file:

ThewebBrowserControl.Navigate(@"c:	he_file.pdf");