Question

I have an ASP.Net MVC site that generates a Microsoft Excel 2003 XML formatted spreadsheet. The spreadsheet looks good, the controller and views both work, but the file won t open in Excel. It opens in the browser because it is an XML document.

I tried changing the ContentType to be the Excel XLS format (application/excel) and that made Excel open the file but it gives a warning message that the file is an XML document, not an XLS document.

How do you make an Excel XML document open in Excel from a web site?

<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage" %><%  
this.Context.Response.Clear();  
this.Context.Response.AddHeader("content-disposition", "attachment;filename=State_Report_" + this.ViewData["State"] + ".xml");  
this.Context.Response.Charset = "";  
this.Context.Response.Cache.SetCacheability(HttpCacheability.NoCache);  
this.Context.Response.ContentType = "application/excel";  
%><?xml version="1.0"?>  
<?mso-application progid="Excel.Sheet"?>  
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"  
  xmlns:o="urn:schemas-microsoft-com:office:office"  
  xmlns:x="urn:schemas-microsoft-com:office:excel"  
  xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"  
  xmlns:html="http://www.w3.org/TR/REC-html40">

Answer 1

Your problem may be in using the file extension .xml, which you re adding in your header. My code that does this same thing does not have a file extension at all.

You might try dropping that .xml extension, or changing it to .xls or .csv.

Answer 2

Try with

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

And keep the .XML extension.

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