症状:      生成Word格式的报告,调试过程中总是出现"服务器出现意外情况。 (异常来自 HRESULT:0x80010105 (RPC_E_SERVERFAULT))"的错误
 原因:      代码 WordApp.Documents.Add(ref Nothing, ref Nothing, ref Nothing,ref Visible), 最后一个参数Visibale设置成false了
 解决方法:Visible=true

using System;
using System.Collections.Generic;
using System.Text;

namespace Business
{
    public class WordDocument
    {
        Microsoft.Office.Interop.Word.Application WordApp;
        Microsoft.Office.Interop.Word.Document WordDoc;
        object SaveChanges = true;
        object Visible = true;//问题就在这里,改成true后就能正常运行了
        object Nothing = System.Reflection.Missing.Value;
        object WordDocPath;
        public WordDocument(string wordDocPath)
        {
            this.WordDocPath = wordDocPath;
            this.Open();
        }
        private void Open()
        {
            if (System.IO.File.Exists(this.WordDocPath.ToString()))
            {
                System.IO.File.Delete(this.WordDocPath.ToString());
            }

            WordApp = new Microsoft.Office.Interop.Word.ApplicationClass();
            WordDoc = WordApp.Documents.Add(ref Nothing, ref Nothing, ref Nothing,ref Visible);
        }        
        public void Append(string Content,int Level)
        {
           WordDoc.Paragraphs.Last.Range.Text = WordDoc.Paragraphs.Last.Range.Text + Content;
            switch (Level)
            {
                case 1:
                    WordDoc.Paragraphs.Last.Range.Font.Bold = 3;
                    WordDoc.Paragraphs.Last.Range.Font.Name = "宋体";
                    WordDoc.Paragraphs.Last.Range.Font.Size = 16;
                    break;
                case 2:
                    WordDoc.Paragraphs.Last.Range.Font.Bold = 3;
                    WordDoc.Paragraphs.Last.Range.Font.Name = "宋体";
                    WordDoc.Paragraphs.Last.Range.Font.Size = 14;
                    break;
                case 3:
                    WordDoc.Paragraphs.Last.Range.Font.Bold = 3;
                    WordDoc.Paragraphs.Last.Range.Font.Name = "宋体";
                    WordDoc.Paragraphs.Last.Range.Font.Size = 12;
                    // Content = "    " + Content;
                    break;
                default:
                    WordDoc.Paragraphs.Last.Range.Font.Bold = 0;
                    WordDoc.Paragraphs.Last.Range.Font.Size = 12;
                    WordDoc.Paragraphs.Last.Range.Font.Name = "宋体";
                    //Content = "    " + Content;
                    break;
            }
             //*/
         
        }
        public void SaveDoc()
        {
            WordDoc.SaveAs(ref this.WordDocPath,ref Nothing,ref Nothing,ref Nothing,
                ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,
                ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing,ref Nothing);
        }
        public void CloseDoc()
        {
            WordDoc.Close(ref SaveChanges, ref Nothing, ref Nothing);
            WordApp.Quit(ref SaveChanges, ref Nothing, ref Nothing);
        }
       private void Create(string wordDocPath)
        {
            System.IO.FileInfo file = new System.IO.FileInfo(wordDocPath);
            file.Create();
        }
    }
}