asp.Netはexeclにデータをエクスポートしてローカルに保存するOfficeコンポーネントを呼び出す必要はありません

    public static string ExportTable(DataSet ds)
    {
        StringBuilder sb = new StringBuilder();
        int count = 0;

        foreach (DataTable tb in ds.Tables)
        {
            sb.AppendLine("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=gb2312\">");
            sb.AppendLine("<table cellspacing=\"0\" cellpadding=\"10\" rules=\"all\" border=\"1\">");
            //    ，      
            sb.AppendLine("<tr style=\"font-weight: bold; white-space: nowrap;\">");
            foreach (DataColumn column in tb.Columns)
            {
                if (column.ColumnName == "  " || column.ColumnName == "  ")
                    sb.AppendLine("<td style=\"width:500px;\">" + column.ColumnName + "</td>");
                else
                    sb.AppendLine("<td>" + column.ColumnName + "</td>");
            }
            sb.AppendLine("</tr>");

            //    
            foreach (DataRow row in tb.Rows)
            {
                sb.Append("<tr>");
                foreach (DataColumn column in tb.Columns)
                {
                    sb.Append("<td>" + row[column].ToString() + "</td>");
                }
                sb.AppendLine("</tr>");
                count++;
            }
            sb.AppendLine("</table>");
        }

        return sb.ToString();
    }

    //  
    protected void btnSaveWord_Click(object sender, EventArgs e)
    {
        System.Web.UI.Page page = this.Page;
        page.Response.Clear();
        page.Response.Buffer = true;
        page.Response.Charset = "gbk";
        string name = tname.Text + System.DateTime.Now.ToString("_yyMMdd_hhmm") + ".xls";
        page.Response.AppendHeader("Content-Disposition", "attachment;filename=" + name);
        page.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");//          
        page.Response.ContentType = "application/ms-excel";//         excel  。
        page.EnableViewState = false;
        //               
        string[] id = Request.Form["ck"].ToString().Split(',');
        good = new DAL.GoodMessage();
        DataSet ds = new DataSet();
        DataTable dt = new DataTable();
        dt.Columns.Add("  ", typeof(string));
        dt.Columns.Add("  ", typeof(string));
        dt.Columns.Add("  ", typeof(string));
        foreach (string idstr in id)
        {
            foreach (DataRow dr in good.GetDataById(Convert.ToInt32(idstr)).Tables[0].Rows)
            {
                DataRow dr1 = dt.NewRow();
                dr1["  "] = dr["title"];
                dr1["  "] = dr["url"];
                dr1["  "] = dr["froms"];
                dt.Rows.Add(dr1);
            }
        }
        ds.Tables.Add(dt);
        page.Response.Write(ExportTable(ds));
        page.Response.End();
        Response.Redirect("DownloadWord.aspx?id=" + name);
    }

    //    
    protected void Page_Load(object sender, EventArgs e)
    {
        string FullFileName = Request.QueryString["id"];

        //          ，       C      IIS     ，  ，    URI           。          web   ，       。
        
        FileInfo DownloadFile = new FileInfo(HostingEnvironment.ApplicationPhysicalPath + FullFileName);  

        //          ，           。

        Response.Clear();

        Response.ClearHeaders();

        Response.Buffer = false;

        Response.ContentType = "application/octet-stream";

        Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FullFileName, System.Text.Encoding.UTF8));

        Response.AppendHeader("Content-Length", DownloadFile.Length.ToString());

        Response.WriteFile(DownloadFile.FullName);

        Response.Flush();

        Response.End();
    }