页面打开excel

1. File => Stream / MemoryStream

FileStream stream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.None);

                try

                {

                    MemoryStream stream2 = new MemoryStream();

                    try

                    {

                        byte[] buffer = new byte[0x1000];

                        int count = 0;

                        while ((count = stream.Read(buffer, 0, 0x1000)) > 0)

                        {

                            stream2.Write(buffer, 0, count);

                        }

                        if ((stream2 != null) && (stream2.Length > 0L))

                        {

                            return stream2;

                        }

                    }

                    catch

                    {

                        stream2.Close();

                    }

                }

                finally

                {

                    if (stream != null)

                    {

                        stream.Close();

                    }

                    exporter.RemoveTempFiles();

                }

               

2. String => File

FileStream fs = null;

             string path = MapPath("~/" + summaryType + ".CSV");  

             string content = csvHelper.ToString();

           //  fs = File.Create(path);

          //   fs.Write(System.Text.Encoding.Default.GetBytes(content), 0, content.Length);

            // fs.Write(System.Text.Encoding.UTF8.GetBytes(content), 0, content.Length);

           //  fs.Close();

fs = new FileStream(path, FileMode.Create, FileAccess.Write);

             StreamWriter sw = null;

             if (System.Text.Encoding.Default == System.Text.Encoding.GetEncoding("GB2312"))

                 sw = new StreamWriter(fs, System.Text.Encoding.GetEncoding("GB2312"));

             else

                 sw = new StreamWriter(fs, System.Text.Encoding.UTF8);

            

             sw.Write(content);

             sw.Close();

            

3. File => IE open

ExportDataToCSV(summaryType, type, days);  //Generate the excel

                string path = MapPath("~/" + summaryType + ".CSV");

                byte[] result = File.ReadAllBytes(path);

//  Response.ContentType = "application/vnd.ms-excel";

                Response.ContentType = "text/CSV";

                Response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}", summaryType + ".CSV"));

                if (System.Text.Encoding.Default == System.Text.Encoding.GetEncoding("GB2312"))

                    Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");

                else

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

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

                Response.BinaryWrite(result);

               

                if (File.Exists(path) == true)

                {

                    File.Delete(path);   //Generate the excel

                }

                Response.End();