C#导出csv文件 支持中文的解决方案

        #region 导出CSV下载

        string exportFileName = "Export" + DateTime.Now.ToString("yyyyMMddHHmmss");

        System.Web.HttpContext context = System.Web.HttpContext.Current;

        StringBuilder sb = new StringBuilder();

        sb.Append("FirstName,LastName,PhoneNo.,State,TimeZone,ZipCode\n");

        for (int i = 0; i < result.PhoneList.Count; i++)

        {

            sb.Append(result.PhoneList[i].FirstName + "," + result.PhoneList[i].LastName + "," + result.PhoneList[i].Phone + "," + result.PhoneList[i].State + "," + result.PhoneList[i].TimeZone + "," + result.PhoneList[i].ZipCode + "\n");

        }

        StringWriter sw = new StringWriter(sb);

        sw.Close();

        context.Response.Clear();

        /* 

         * Acme 2012-07-04 edit 

         *  

        context.Response.Charset = "gb2312"; 

        context.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312"); 

        context.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"; // "application/octet-stream"; //"application/vnd.ms-excel"; //application/vnd.openxmlformats-officedocument.spreadsheetml.sheet                   

        //context.Response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}", fileName)); 

        */

        //below is new writing  

        context.Response.Charset = "UTF-8";

        context.Response.ContentEncoding = System.Text.Encoding.UTF8;

        context.Response.HeaderEncoding = System.Text.Encoding.UTF8;

        context.Response.ContentType = "text/csv";

        //主要是下面这一句

        context.Response.BinaryWrite(new byte[] { 0xEF, 0xBB, 0xBF });

        context.Response.Write(sw);

        context.Response.AppendHeader("content-disposition", "attachment; filename=" + HttpUtility.UrlEncode(exportFileName + ".csv", System.Text.Encoding.UTF8).Replace("+", "%20"));

        //context.Response.OutputStream.Write(fileData, 0, fileData.Length);  

        context.Response.Flush();

        context.Response.End();

        #endregion