如何将网页中指定DIV中的内容插入到WORD中指定标签位置进行替换？

我用以下代码实现了文本替换指定标签。请问如何实现将网页中指定DIV中的内容对WORD中指定标签进行替换？请给出源码，请尽可能通过这个类进行操作。。

 protected void ReplaceWordDocAndSave(Microsoft.Office.Interop.Word.Document docObject, object savePath)
    {
        object format = Microsoft.Office.Interop.Word.WdSaveFormat.wdFormatDocument;
        object readOnly = false;
        object isVisible = false;

        string strOldText = "{WORD}";
        string strNewText = "用于替换的文本";

        List<string> IListOldStr = new List<string>();
        IListOldStr.Add("被替换的文本");

        Object Nothing = System.Reflection.Missing.Value;

        Microsoft.Office.Interop.Word.Application wordApp = new Microsoft.Office.Interop.Word.Application();
        //Microsoft.Office.Interop.Word.Document oDoc = wordApp.Documents.Open(ref obj, ref Nothing, ref readOnly, ref Nothing, ref Nothing, ref Nothing, ref Nothing, ref Nothing, ref Nothing, ref Nothing, ref Nothing, ref isVisible, ref Nothing, ref Nothing, ref Nothing, ref Nothing); 
        Microsoft.Office.Interop.Word.Document oDoc = docObject;

        object FindText, ReplaceWith, Replace;
        object MissingValue = Type.Missing;

        foreach (string str in IListOldStr)
        {

            oDoc.Content.Find.Text = str;
            //要查找的文本 
            FindText = str;
            //替换文本 
            ReplaceWith = strNewText;

            //wdReplaceAll - 替换找到的所有项。 
            //wdReplaceNone - 不替换找到的任何项。 
            //wdReplaceOne - 替换找到的第一项。 
            Replace = Microsoft.Office.Interop.Word.WdReplace.wdReplaceAll;

            //移除Find的搜索文本和段落格式设置 
            oDoc.Content.Find.ClearFormatting();

            if (oDoc.Content.Find.Execute(ref FindText, ref MissingValue, ref MissingValue, ref MissingValue, ref MissingValue, ref MissingValue, ref MissingValue, ref MissingValue, ref MissingValue, ref ReplaceWith, ref Replace, ref MissingValue, ref MissingValue, ref MissingValue, ref MissingValue))
            {
                Response.Write("替换成功！");
                Response.Write("<br>");
            }
            else
            {
                Response.Write("没有相关要替换的：（" + str + "）字符");
                Response.Write("<br>");
            }
        }

        oDoc.SaveAs(ref savePath, 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);

        //关闭wordDoc文档对象     
        oDoc.Close(ref Nothing, ref Nothing, ref Nothing);
        //关闭wordApp组件对象     
        wordApp.Quit(ref Nothing, ref Nothing, ref Nothing);
    }