Install-Package DocXToPdfConverter

2、下載LibreOffice

https://www.libreoffice.org/download/portable-versions/

下載後安裝軟體。

3、編寫程式碼進行轉換

var fileDialog = new OpenFileDialog();
fileDialog.Filter = "所有檔案(*.*)|*.*";
if (fileDialog.ShowDialog() == true)
{
    var fileName = fileDialog.FileName;

    
 
// initialize LibreOffice soffice.exe filepath
    string locationOfLibreOfficeSoffice = @"D:\Program Files\LibreOfficePortable\App\libreoffice\program\soffice.exe";
    // define placeholders
    var placeholders = new Placeholders();
    placeholders.NewLineTag = "<br/>";
    placeholders.TextPlaceholderStartTag 
 
= "##";
    placeholders.TextPlaceholderEndTag = "##";
    placeholders.TablePlaceholderStartTag = "==";
    placeholders.TablePlaceholderEndTag = "==";
    placeholders.ImagePlaceholderStartTag = "++";
    placeholders.ImagePlaceholderEndTag = "++";
    // initialize report generator
    var test = new
 
 ReportGenerator(locationOfLibreOfficeSoffice);

    // convert DOCX to PDF
    test.Convert(fileName, fileName + ".pdf", placeholders);
    Process.Start("explorer.exe", "/select," + fileName + ".pdf");
}

其中locationOfLibreOfficeSoffice引數的路徑換成你自己LibreOffice的安裝路徑。