基于OFFICE COM的程序池

采用该方式可以控制WORD的进程数，加快调用的速度。但是验证中发现更多的进程并不会加速整体的响应速度，由于WORD的处理需要消耗大量的CPU，因此采用该方式可以限制WORD的处理对CPU的消耗（虽然原先想提供WORD的处理的并发效率）

    public class OfficePoolUtil
    {
        private static WordAppPool[] wordAppPools;
        public static int createWordAppPool(int iRate)
        {
            //int iCpuCount = Convert.ToInt32(System.Environment.GetEnvironmentVariable("NUMBER_OF_PROCESSORS"));
            //iCpuCount = iCpuCount * iRate;
            //wordAppPools = new WordAppPool[iCpuCount];
            int iCpuCount = iRate;
            wordAppPools = new WordAppPool[iCpuCount];
            for (int i = 0; i < iCpuCount; i++)
            {
                wordAppPools[i] = new WordAppPool();
                wordAppPools[i].ap_wordAppInstance = new Word.ApplicationClass();
                wordAppPools[i].ap_wordAppInstance.Visible = false;
                wordAppPools[i].ap_wordAppInstance.ScreenUpdating = false;
                wordAppPools[i].ap_count = 0;
                //wordAppPools[i].ap_isFree = true;
            }
            return iCpuCount;
        }

        public static void cleanWordAppPool()
        {
            object savechange = Word.WdSaveOptions.wdDoNotSaveChanges;
            Object missing = Missing.Value;

            for (int j = 0; j < wordAppPools.Length; j++)
            {
                wordAppPools[j].ap_wordAppInstance.Quit(ref savechange, ref missing, ref missing);
                ReleaseCOM(wordAppPools[j].ap_wordAppInstance);
                wordAppPools[j].ap_wordAppInstance = null;

            }
            wordAppPools = null;
        }

        public static Word.ApplicationClass getWordAppInstance()
        {
            int iMin = wordAppPools[0].ap_count;
            int iIndex = 0;
            for (int j = 1; j < wordAppPools.Length; j++)
            {
                if (iMin > wordAppPools[j].ap_count)
                {
                    iMin = wordAppPools[j].ap_count;
                    iIndex = j;
                }
            }
            wordAppPools[iIndex].ap_count++;
            return wordAppPools[iIndex].ap_wordAppInstance;

        }

        private static void ReleaseCOM(object o)
        {
            try
            {
                //System.Runtime.InteropServices.Marshal.ReleaseComObject(o);
                System.Runtime.InteropServices.Marshal.FinalReleaseComObject(o);
            }
            catch
            {
            }
            finally
            {
                o = null;
            }
        }

    }


    public class WordAppPool
    {
        /// <summary>
        /// word app
        /// </summary>
        public Word.ApplicationClass ap_wordAppInstance;

        public bool ap_isFree;

        public Int32 ap_count;
    }

调用方式

                    wordDoc = OfficePoolUtil.getWordAppInstance().Documents.Open(ref Filename,
......