頁面打開excel

原創

2020-02-21 05:33

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();