I am trying to export my repeater to excel and here is my code...
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
string attachment = "attachment; filename=file.xls";
Response.ClearContent();
Response.AddHeader("content-disposition", attachment);
Response.ContentType = "application/vnd.ms-excel";
rpt.RenderControl(htw);
Response.Write(sw.ToString());
Response.Flush();
Response.End();
When I am trying to open file getting this error
The file you are trying to open, 'file.xls', is in a different format than specified
by the file extension. Verify that the file is not Corrupted and is from a trusted
source before opening the file. Do you want to open the file now?
Yes No Help option are available
What's wrong in my code or What I have to do resolve this issue.
Thanks
You are setting the content type to application/vnd.ms-excel but you are sending HTML contents in the response stream when you call the RenderContents method. You might need a library to generate Excel files.
Try wrapping your content into this:
StringBuilder sb = new StringBuilder("");
sb.Append("<HTML xmlns:x=\"urn:schemas-microsoft-com:office:excel\"><HEAD>");
sb.Append("<meta http-equiv=Content-Type content=\"text/html; charset=utf-8\">");
sb.Append("<!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>");
sb.Append(title);
sb.Append("</x:Name><x:WorksheetOptions><x:Print><x:ValidPrinterInfo/></x:Print></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--> </HEAD><BODY>");
sb.Append(content);
sb.Append("</BODY></HTML>");
Related
Using a memory stream & the correct MIME type with Response.ContentType. Special characters are displayed instead of prompting to open a Word document. I'm using:
using (MemoryStream ms = new MemoryStream())
{
doc.SaveAs(ms);
Response.Clear();
Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}", fileName));
Response.ContentType = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
ms.WriteTo(Response.OutputStream);
Response.End();
}
Here's an example of the output I get now rather than a prompt to open a Word document:
Turns out it was not a MIME or Response.ContentType issue at all. Being an MVC application, I was attempting to open the FileResult in a modal. Copy/Paste fail, as other buttons worked this way to display content. Not a Word document!
Hi i am trying to export grid data to excel but it is not working in IE8.I am using a Ajax Modal PopUp dialog box containing 2 buttons 'ok' and 'close'.On Ok click i want to download excel file.it works fine in Mozilla but in IE its not working.I am using below code. please suggest me how to do that?Also when i open file first it show warning before opening file how to handle that?
Response.Clear();
Response.Buffer = true;
string filename = "Checkout";
Response.Charset = "";
Response.ContentType = "application/vnd.ms-excel";
Response.AddHeader("content-disposition", "attachment; filename=" + filename + ".adt");
Response.Write("<html xmlns:x=\"urn:schemas-microsoft-com:office:excel\">");
Response.Write("<head>");
Response.Write("<META http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">");
Response.Write("<!--[if gte mso 9]><xml>");
Response.Write("<x:ExcelWorkbook>");
Response.Write("<x:ExcelWorksheets>");
Response.Write("<x:ExcelWorksheet>");
Response.Write("<x:Name>Sheet1</x:Name>");
Response.Write("<x:WorksheetOptions>");
Response.Write("<x:Print>");
Response.Write("<x:ValidPrinterInfo/>");
Response.Write("</x:Print>");
Response.Write("</x:WorksheetOptions>");
Response.Write("</x:ExcelWorksheet>");
Response.Write("</x:ExcelWorksheets>");
Response.Write("</x:ExcelWorkbook>");
Response.Write("</xml>");
Response.Write("<![endif]--> ");
Response.Write("</head>");
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
GridView gv = new GridView();
gv.AutoGenerateColumns = true;
gv.DataSource = dt;
gv.DataBind();
gv.RenderControl(hw);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
You get warning because tehnically speaking this is not export to excel, but you send a html with a wrong headers to trick browser to open this content with excel.
Better use native Excel library and generate real Excel file on the server, for example EPPlus, it's open source and doesn't require excel on server.
Here is the example of ashx handler that generates excel file from DataTable
https://stackoverflow.com/a/9569827/351383
I got stuck with my ASP.Net export to PDF. Below are my codes. Please help.
Response.Clear();
Response.Buffer = true;
Response.Charset = Encoding.UTF8.HeaderName;
Response.ContentEncoding = Encoding.UTF8;
Response.Write(string.Format("<meta http-equiv=Content-Type content=text/html;charset={0}>", Encoding.UTF8.HeaderName));
Response.ContentType = "application/pdf";
Response.Headers.Add("Content-disposition", "attachment; filename=pdffilename.pdf");
StringBuilder sb = new StringBuilder();
sb.Append("MIME-Version: 1.0\r\n");
sb.Append("X-Document-Type: Worksheet\r\n");
sb.Append("Content-Type: multipart/related; boundary=\"----=mtrSystem\"\r\n\r\n\r\n");
sb.Append("------=mtrSystem\r\n");
sb.Append("Content-Type: text/html; charset=\"utf-8\"\r\n");
sb.Append("<html xmlns:o=\"urn:schemas-microsoft-com:office:office\"\r\n");
sb.Append("xmlns:x=\"urn:schemas-microsoft-com:office:pdf\">\r\n\r\n\r\n");
sb.Append("------=mtrSystem\r\n");
sb.Append("Content-ID: baiduimg\r\n");
sb.Append("Content-Transfer-Encoding: base64\r\n");
sb.Append("Content-Type: image/png\r\n\r\n");
Can i use this way to export my ASP.Net page to PDF?
Html-to-pdf.net allows for converting html to pdf. TO get the html from an asp.net page, use the following code:
StringWriter sw = new StringWriter();
Server.Execute("PageToConvert.aspx", sw);
string htmlCodeToConvert = sw.GetStringBuilder().ToString();
Then pass the html to the pdf generator:
public byte[] GetPdfBytesFromHtmlString (string htmlString)
You can then save the bytes to the response to send to client, or save on the server as a local file.
EDIT:
Something to keep in mind, html-to-pdf does cost money, but for my last project it was a justified expense. You can use the trial version to figure out what you needd.
I'm not entirely sure what you're trying to do, but generally I can highly recommend PDFSharp for creating PDF documents in code...
I'm currently trying to write data (client machine) into a xml file where the user can save. However, I want the users to be able to decide on where they want to save this written xml file. Is there any controls or codes that I can use to allow the users to save the file?.
Update:
is that right way to do?
**HttpContext.Current.Response.Write(xw.ToStroing()); <<< ??????**
HttpContext.Current.Response.End();
update:
XmlWriterSettings settings = new XmlWriterSettings();
settings.Indent = true;
MemoryStream ms = new MemoryStream();
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ContentType = "text/xml";
HttpContext.Current.Response.AddHeader("Content-Disposition:", "attachment;filename=" + HttpUtility.UrlEncode(fileName));
using (StringWriter sw = new StringWriter())
{
using (XmlWriter xw = XmlWriter.Create(ms, settings))
{
xw.WriteStartDocument();
xw.WriteStartElement("Name");
xw.WriteStartElement("Application");
................
......................
HttpContext.Current.Response.Write(xw.ToStroing());
HttpContext.Current.Response.End();
When you begin a file download, the client's browser will handle the file saving location.
If you want to force the file to download instead of open, add this HTTP header to your response:
Content-Disposition: attachment; filename="myFile.xml"
here is the link helps me :)
Where is the MemoryStream being used? You should pass the StringWriter to the XmlTextWriter constructor then Response.Write() the contents of the StringWriter
Add this after the Response.AddHeader line:
Response.ContentType = "application/octet-stream";
This will force download of files, regardless the file type.
I have a Gridview in my ASP.NET C# Page. It has a couple of columns and also one image column. I can export the entire columns to an Excel file, but the image column is blank. By the way, I use the full path.
Any Idea?
Yes in default.aspx (For local Export)
ImageUrl="http://localhost:4056/CSharp/banner.gif"
instead of ImageUrl="~/banner.gif"
or (For remote Export)
http://your ip address here :port/foldername/filename
Response.Clear(); //this clears the Response of any headers or previous output
Response.Buffer = true; //make sure that the entire output is rendered simultaneously
Response.ContentType = "application/vnd.ms-excel";
StringWriter stringWriter = new StringWriter(); //System.IO namespace should be used
HtmlTextWriter htmlTextWriter = new HtmlTextWriter(stringWriter);
GridView2.GridLines = GridLines.Both;
GridView2.RenderControl(htmlTextWriter);
Response.Write(stringWriter.ToString());
Response.End();