RDLC - 后台代码直接导出Excel/PDF/Word格式

最近做报表功能，用到了.net的报表组件rdlc。

其中有个功能就是后台代码直接输出Excel/PDF/Word格式的文件，
网上看了些资源，做个总结：

参考地址

我直接贴出代码：

//自动导出excel/pdf/word
        private void ResponseFile(int oType, string fileName)
        {
            string outType;
            if (oType == )
            {
                outType = "Excel";
            }
            else if (oType == )
            {
                outType = "Word";
            }
            else
            {
                outType = "Word";
            }
            try
            {
                Warning[] warnings;
                string[] streamids;

                string mimeType;
                string encoding;
                string extension;

                byte[] bytes = ReportViewer1.LocalReport.Render(
                        outType, null, out mimeType, out encoding, out extension,
                        out streamids, out warnings);
                    Response.Clear();
                    Response.Buffer = true;
                    Response.ContentType = mimeType;
                    Response.AddHeader("content-disposition", "attachment;filename=" + fileName + "." + extension);
                    Response.BinaryWrite(bytes);

                    Response.Flush();

            }

            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }