I am trying to generate a csv with UTF8 encoding with c#, using ExcelPackage (). Excel is identifying the file as .xlsx and not UTF8. My code:
using (ExcelPackage package = new ExcelPackage())
{
ExcelWorksheet ws = package.Workbook.Worksheets.Add("myName");
int y = 1;
foreach (IDictionary<string, string> elemento in losDatos)
{
ws.Cells["A" + y].Value = "+ Disposición de contacto";
ws.Cells["B" + y].Value = "Llamada detallada";
...
...
ws.Cells["AL" + y].Value = "1";
y++;
}
Response.Clear();
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.AddHeader("Content-Disposition", "attachment;filename=myName" + DateTime.Now.ToString("yyyyMMdd_HHmm") + ".csv");
Response.BinaryWrite(package.GetAsByteArray());
Response.End();
}
I have tried some changes, only in the Response piece, and now the csv recognizes me, but the characters are strangers:
Response.Clear();
Response.ContentType = "application/csv";
Response.AddHeader("Content-Disposition", "attachment;filename=myName" + DateTime.Now.ToString("yyyyMMdd_HHmm") + ".csv");
Response.BinaryWrite(Encoding.UTF8.GetPreamble());
Response.BinaryWrite(package.GetAsByteArray());
Response.End();
Replace
Response.ContentType = "application/csv";
Response.AddHeader("Content-Disposition", "attachment;filename=myName" + DateTime.Now.ToString("yyyyMMdd_HHmm") + ".csv");
Response.BinaryWrite(Encoding.UTF8.GetPreamble());
with
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.AddHeader("Content-Disposition", "attachment;filename=myName" + DateTime.Now.ToString("yyyyMMdd_HHmm") + ".xlsx");
and you are done.
If you want a CSV, use a different package but then do consider adding charset to the Content-Type header. If Open XML is not your thing, then OpenDocument Spreadsheet (.odt, LibreOffice) would be equally better than CSV.
Related
My xlsx file is downloaded but when I open that xlsx file it shows warning as
'We found a problem with some content in'.
Can anyone tell me where I have to fix this? I am using an iFrame to download the file.
using (ClosedXML.Excel.XLWorkbook wb = new XLWorkbook())
{
wb.Worksheets.Add(dt, "Sheet1");
Response.Clear();
Response.Charset = "";
Response.Buffer = true;
Response.BinaryWrite(bytes);
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.AddHeader("content-disposition", "attachment;filename=" + >Model.reportName + "_" + DateTime.Now.ToString("yyyyMMddHH:mm") + "." + extension);
using (MemoryStream MyMemoryStream = new MemoryStream())
{
wb.SaveAs(MyMemoryStream);
MyMemoryStream.WriteTo(Response.OutputStream);
Response.Flush();
Response.Close();
HttpContext.Current.ApplicationInstance.CompleteRequest();
}
string fileName = "test" + DateTime.Now.ToShortDateString();
using (package = new ExcelPackage(newFile, "file"))
{
generateReport();//this function generates a worksheet
package.Workbook.Properties.Title = #"Title of project";
package.Workbook.Properties.Author = "Sri";
package.Workbook.Properties.Subject = #"Report";
byte[] rawData = package.GetAsByteArray();
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader("content-disposition", "attachment; filename=" + fileName + ".xlsx");
Response.BinaryWrite(rawData);
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.Flush();
Response.End();
Hi,when i try to export datatable to excel ,columns which has date appears as numbers in the excel file.When i further check these numbers are DATEVALUE(date)(this function is used in excel) results of excel.
When exporting SQL Server data to .csv, phrases in Persian don't show up correctly.
string date = Helper.ToPersianDate(DateTime.Now).Replace("/", "");
date += ".csv";
Response.Clear();
Response.AppendHeader("content-disposition", "attachment; filename=" + date);
Response.ContentType = "text/csv";
Response.Charset = Encoding.Unicode.ToString();
foreach (DataRow r in ds.Tables[0].Rows)
{
Response.Write(r[0]);
Response.Write("\r\n");
}
Response.End();
string date = Helper.ToPersianDate(DateTime.Now).Replace("/", "");
date += ".csv";
Response.Clear();
Response.AppendHeader("content-disposition", "attachment; filename=" + date);
Response.ContentType = "text/csv";
Response.Charset = Encoding.Unicode.ToString();
Response.ContentEncoding = System.Text.Encoding.Unicode;
/*
save utf-8 with BOM
GetPreamble
*/
Response.BinaryWrite(System.Text.Encoding.Unicode.GetPreamble());
foreach (DataRow r in ds.Tables[0].Rows)
{
Response.Write(r[0]);
Response.Write("\r\n");
}
Response.End();
I am using this code to download a image i.e. I am storing Image name with extension in database and getting it here.
this code throws no error but doesn't download anything. why ?
try {
if (e.CommandName == "Download")
{
string ImgPath = Convert.ToString(r["Attachment"]);
//string ImgName = r["ComplaintDetailID"].ToString() + "-" + r["LetterNo"].ToString() + "-" + DateTime.Now.ToString("ddMMyyyyhhmmss");
//string filePath = ImgName + ".jpg";
string fullFilePath = Server.MapPath("~/SiteImages/CMS/" + ImgPath);
Response.Clear();
Response.ClearHeaders();
Response.ClearContent();
Response.AddHeader("Content-Disposition", "attachment; filename=" + Path.GetFileName(fullFilePath));
Response.ContentType = ContentType;
Response.TransmitFile(fullFilePath); //downloads file
Response.Flush();
//FileInfo file = new FileInfo(fullFilePath);
//file.Delete(); //deletes file after downloading
}
}
catch (Exception ex)
{
ResultLabel.ResultLabelAttributes(ex.Message, ProjectUserControls.Enums.ResultLabel_Color.Red);
}
finally
{
ResultPanel.Controls.Add(ResultLabel);
}
Update:
i tried this but doesn't work.
if (e.CommandName == "Download")
{
string ImgPath = Convert.ToString(r["Attachment"]);
//string ImgName = r["ComplaintDetailID"].ToString() + "-" + r["LetterNo"].ToString() + "-" + DateTime.Now.ToString("ddMMyyyyhhmmss");
//string filePath = ImgName + ".jpg";
MemoryStream m = new MemoryStream();
File.OpenRead(ImgPath).CopyTo(m);
m.WriteTo(Response.OutputStream);
string fullFilePath = Server.MapPath("~/SiteImages/CMS/" + ImgPath);
Response.Clear();
Response.ClearHeaders();
Response.ClearContent();
Response.AddHeader("Content-Disposition", "attachment; filename=" + Path.GetFileName(fullFilePath));
Response.ContentType = ContentType;
Response.TransmitFile(fullFilePath); //downloads file
Response.Flush();
//FileInfo file = new FileInfo(fullFilePath);
//file.Delete(); //deletes file after downloading
}
Create a Stream using following code
MemoryStream m = new MemoryStream();
File.OpenRead(ImgPath ).CopyTo(m);
m.WriteTo(Response.OutputStream);
You're on the right track using TransmitFile. Check this line:
Response.ContentType = ContentType;
It looks like you're setting the ContentType to the page's default.
Try specifying it explicitly:
Response.ContentType = "image/jpeg";
I am actually wondering why when I create a zip file, and I download it just after, I can't open it because it's broken ..
This is the code I am actually using .
string url = ((LinkButton)sender).Tag;
var downloadFileName = string.Format(((LinkButton)sender).ID + ".zip");
System.IO.DirectoryInfo di = new System.IO.DirectoryInfo("C://inetpub//wwwroot//Files//Wireframes//" + url);
using (ZipFile zip = new ZipFile())
{
zip.AddEntry("C://inetpub//wwwroot//Files//Wireframes//" + url, zip.Name);
zip.AddDirectory("C://inetpub//wwwroot//Files//Wireframes//" + url);
zip.Save(downloadFileName);
}
Response.ContentType = "application/zip";
Response.AddHeader("Content-Disposition", "filename=" + downloadFileName);
Also, I am adding directly all the directories with their files inside.
You are not sending the actual data.
Response.ContentType = "application/zip";
Response.AddHeader("Content-Disposition", "filename=" + downloadFileName);
Response.TransmitFile(downloadFileName);
Response.End();