using Microsoft.Office.Interop.Word;//引用
public Application Word;
public Document Doc;
public object miss = System.Reflection.Missing.Value;

object path = System.Web.HttpContext.Current.Server.MapPath("~/TemplateFile/Import/" + fileName + ".doc");
Object Nothing = System.Reflection.Missing.Value;//内容
//创建文档
Word = new ApplicationClass();
Doc = Word.Documents.Add(ref Nothing, ref Nothing, ref Nothing, ref Nothing);
                #region 添加页眉
                //添加页眉
                Word.ActiveWindow.View.Type = WdViewType.wdOutlineView;
                Word.ActiveWindow.View.SeekView = WdSeekView.wdSeekPrimaryHeader;
                Word.ActiveWindow.ActivePane.Selection.InsertAfter("[页眉内容]");
                Word.Selection.ParagraphFormat.Alignment = WdParagraphAlignment.wdAlignParagraphRight;//设置右对齐
                Word.ActiveWindow.View.SeekView = WdSeekView.wdSeekMainDocument;//跳出页眉设置
                //Word.Selection.ParagraphFormat.LineSpacing = 15f;//设置文档的行间距
                Doc.PageSetup.PageHeight = Word.CentimetersToPoints(29.7f);
                Doc.PageSetup.PageWidth = Word.CentimetersToPoints(21f);
                Doc.PageSetup.LeftMargin = 5f;
                Doc.PageSetup.TopMargin = 0f;
                //Doc.PageSetup.TopMargin = 57;//设置上边距
                //Doc.PageSetup.BottomMargin = 57;//下边距
                //Doc.PageSetup.LeftMargin = 57;//左边距
                //Doc.PageSetup.RightMargin = 57;//右边距
                #endregion

//文档中创建表格
                Table newTable = Doc.Tables.Add(Word.Selection.Range, allRoews, 4, ref Nothing, ref Nothing);
                //设置表格样式
                newTable.Borders.OutsideLineStyle = WdLineStyle.wdLineStyleSingle;
                newTable.Borders.InsideLineStyle = WdLineStyle.wdLineStyleSingle;
                newTable.Columns[1].Width = 142f;
                newTable.Columns[2].Width = 142f;
                newTable.Columns[3].Width = 142f;
                newTable.Columns[4].Width = 142f;

                newTable.Cell(2, 1).Range.Text ="内容";
Doc.Paragraphs.Last.Range.Text = "文档创建时间:" + DateTime.Now.ToString("yyyy-MM-dd");//落款
                Doc.Paragraphs.Last.Alignment = WdParagraphAlignment.wdAlignParagraphRight;
                //文件保存
                Doc.SaveAs(ref path, 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);
                Doc.Close(ref Nothing, ref Nothing, ref Nothing);
                Word.Quit(ref Nothing ,ref Nothing, ref Nothing);

------解决方案--------------------

http://download.csdn.net/tag/word.dll