使用已經存在的Word實例

Question

我從來沒有在C＃或Visual Studio中編程，我認為入門的唯一方法是潛入並體驗傷害和痛苦並解決問題的產生。 請原諒我的補救問題和缺乏經驗。

我下面有以下代碼，如果尚未打開應用程序，則打開該應用程序。 還返回進程ID（以防萬一，我需要它）打開應用程序后，代碼集2將文檔打印到默認打印機，該打印機是在打開應用程序之前設置的。

using System;
using System.Diagnostics;

namespace ImageIT.PreFlight
{
    public class AppCheck
    {
        public int IsAppOpen (string appCheck)
        {
            Console.WriteLine("We are in APPCHECK");
            var appToStart = Process.GetProcessesByName(appCheck);
            Process[] processlist = Process.GetProcesses();
            var appID = 0;

            if (appToStart.Length == 0)
            {
                ProcessStartInfo startInfo = new ProcessStartInfo
                {
                    FileName = appCheck,
                    CreateNoWindow = true,
                    Arguments = "/q /n /x",
                    WindowStyle = ProcessWindowStyle.Hidden,
                };
                Process.Start(startInfo);
                appID = Process.GetProcessesByName(appCheck)[0].Id;
                Console.WriteLine(appCheck + " Has been Starterd - Process ID: " + appID);
                Console.WriteLine("");
            }
            else
            {
                foreach (Process theprocess in processlist)
                    if (theprocess.ProcessName == appCheck)
                    {
                        appID = theprocess.Id;
                        Console.WriteLine(appCheck + " Has been found - Process ID: " + appID);
                        Console.WriteLine("");
                    }
            }
            return appID;
        }
    } 
}

代碼集2

using System;
using System.Runtime.InteropServices;
using Word = Microsoft.Office.Interop.Word;


namespace ImageIT.AppPrint
{

    public class PrintToImage
    {

        public void PrintWordDocument(string fileToPrint, int wordID)
        {
            object objMissing = System.Reflection.Missing.Value;

            Console.WriteLine("We are Currently in PrintToImage");
            Console.WriteLine("The current Word INSTANCE ID is: "+ wordID);
            //Word.Application objWord = new Word.Application();


            Word.Application objWord = (Word.Application)Marshal.GetActiveObject("Word.Application") as Word.Application;
            //objWord = System.Runtime.InteropServices.Marshal.GetActiveObject("Word.Application") as Word.Application;


            Word.Document objDoc = new Word.Document();

            //object fileName = fileToPrint;
            //Console.WriteLine("File to Print:" + fileToPrint);

            //objDoc = objWord.Documents.Open(ref fileName,
            //    ref objMissing, ref objMissing, ref objMissing, ref objMissing, ref objMissing,
            //    ref objMissing, ref objMissing, ref objMissing, ref objMissing, ref objMissing,
            //    ref objMissing, ref objMissing, ref objMissing, ref objMissing, ref objMissing);

            //object copies = "1";
            //object pages = "";
            //object range = Microsoft.Office.Interop.Word.WdPrintOutRange.wdPrintAllDocument;
            //object items = Microsoft.Office.Interop.Word.WdPrintOutItem.wdPrintDocumentContent;
            //object pageType = Microsoft.Office.Interop.Word.WdPrintOutPages.wdPrintAllPages;
            //object objTrue = true;
            //object objFalse = false;

            //objDoc.PrintOut(
            //    ref objTrue, ref objFalse, ref range, ref objMissing, ref objMissing, ref objMissing,
            //    ref items, ref copies, ref pages, ref pageType, ref objFalse, ref objTrue,
            //    ref objMissing, ref objFalse, ref objMissing, ref objMissing, ref objMissing, ref objMissing);

            //objDoc.Close(ref objFalse, ref objMissing, ref objMissing);
        }


    }
}

如果我用

//Word.Application objWord = new Word.Application();

將打開一個新的MS-Word實例，文檔將按預期打印到圖像上。 可能會有數百個圖像文件，所以我嘗試避免這種情況。

我能找到的關於如何實現這一目標的最佳文章是

https://blogs.msdn.microsoft.com/eric_carter/2009/03/12/attaching-to-an-already-running-office-application-from-your-application-using-getactiveobject-or-bindtomoniker/

但是當嘗試

//objWord = System.Runtime.InteropServices.Marshal.GetActiveObject("Word.Application") as Word.Application;

我收到“名稱objWord在當前上下文中不存在”

我將其更改為

Word.Application objWord = (Word.Application)Marshal.GetActiveObject("Word.Application") as Word.Application;

應用程序崩潰。

注意：大多數行已被注釋掉以進行測試。

非常感謝任何幫助，謝謝您的提前。

Answer 1

謝謝您的協助-我的最初嘗試並不遙遠，並且存在一個Visual Studio錯誤，該錯誤已通過最新的15.5.1更新進行了修正---行已修改為->
Word.Application objWord = System.Runtime.InteropServices.Marshal.GetActiveObject("Word.Application") as Word.Application ；