Export to CSV using MVC C and jQuery

Question

I am trying to export a list to a CSV file  I got it all working up to the point I want to write to file to the response stream  This doesn t do anything   Here is my code   Call the the method from the page       btn export   click function                 post  NewsLetter Export          The code in the controller is as follows      HttpPost          public void Export                         try                               var filter   Session FilterSessionKey     null   Session FilterSessionKey  as SubscriberFilter   new SubscriberFilter                     var predicate    subscriberService BuildPredicate filter                   var compiledPredicate   predicate Compile                    var filterRecords    subscriberService GetSubscribersInGroup   Where x   gt   x IsDeleted  AsEnumerable   Where compiledPredicate  GroupBy s   gt  s Subscriber EmailAddress  OrderBy x   gt  x Key                    ExportAsCSV filterRecords                             catch  Exception exception                                Logger WriteLog LogLevel Error  exception                                    private void ExportAsCSV IEnumerable lt IGrouping lt String  SubscriberInGroup gt  gt  filterRecords                        var sw   new StringWriter                  write the header             sw WriteLine String Format   0   1   2   3    CMSMessages EmailAddress  CMSMessages Gender  CMSMessages FirstName  CMSMessages LastName                   write every subscriber to the file             var resourceManager   new ResourceManager typeof CMSMessages                foreach  var record in filterRecords Select x   gt  x First   Subscriber                                 sw WriteLine String Format   0   1   2   3    record EmailAddress  record Gender HasValue   resourceManager GetString record Gender ToString          record FirstName  record LastName                               Response Clear                Response AddHeader  Content-Disposition    attachment  filename adressenbestand csv                Response ContentType    text csv               Response Write sw               Response End                But after Response Write sw  nothing is happening  Is it even possible to save a file this way   Regards    Edit The response headers I see when I click the button are     HTTP 1 1 200 OK Cache-Control  private Content-Type  text csv  charset utf-8 Server  Microsoft-IIS 7 5 X-AspNetMvc-Version  2 0 Content-Disposition  attachment  filename adressenbestand csv X-Powered-By  ASP NET Date  Wed  12 Jan 2011 13 05 42 GMT Content-Length  113   Which seem OK to me    Edit I got rid of the jQuery part en replaced it by an hyperlink and this is working fine for me now      lt a class  export  href  NewsLetter Export  gt exporteren lt  a gt

User · Answer

In addition to Biff MaGriff s answer  To export the file using JQuery  redirect the user to a new page       btn export   click function          window location href    NewsLetter Export

User · Answer

With MVC you can simply return a file like this   public ActionResult ExportData         System IO FileInfo exportFile     create your ExportFile     return File exportFile FullName   text csv   string Format  Export- 0  csv   DateTime Now ToString  yyyyMMdd-HHmmss

User · Answer

Respect to Biff  here s a few tweaks that let me use the method to bounce CSV from jQuery Post against the server and come back as a CSV prompt to the user         Themed false       public FileContentResult DownloadCSV                  var csvStringData   new StreamReader Request InputStream  ReadToEnd             csvStringData   Uri UnescapeDataString csvStringData Replace  mydata                   return File new System Text UTF8Encoding   GetBytes csvStringData    text csv    report csv            You ll need the unescape line if you are hitting this from a form with code like the following        var input       lt input gt    attr  type    hidden   attr  name    mydata   val data           downloadForm   append   input            downloadForm   submit

User · Answer

From a button in view call  click call some java script   From there call controller method by window location href    Controller Method    In controller either do the database call and get the datatable or call some method get the data from database table to a datatable and then do following   using  DataTable dt   new DataTable                                                          sda Fill dt                                 Build the CSV file data as a Comma separated string                              string csv   string Empty                              foreach  DataColumn column in dt Columns                                                                  Add the Header row for CSV file                                  csv    column ColumnName                                                                    Add new line                              csv      r n                               foreach  DataRow row in dt Rows                                                                foreach  DataColumn column in dt Columns                                                                          Add the Data rows                                      csv    row column ColumnName  ToString   Replace                                                                                      Add new line                                  csv      r n                                                                 Download the CSV file                               Response Clear                                 Response Buffer   true                               Response AddHeader  content-disposition    attachment filename SqlExport  DateTime Now   csv                                 Response Charset                                      Response ContentType    application text                                Response ContentType    application x-msexcel                                Response Output Write csv                                Response Flush                                 Response End

User · Answer

I Think you have forgot to use     Response Flush      under     Response Write sw     please check

User · Answer

Simple excel file create in mvc 4  public ActionResult results                 return File new System Text UTF8Encoding   GetBytes  string data     application csv    filename csv

User · Answer

What happens if you get rid of the stringwriter           Response Clear            Response AddHeader  Content-Disposition    attachment  filename adressenbestand csv            Response ContentType    text csv             write the header         Response Write String Format   0   1   2   3    CMSMessages EmailAddress  CMSMessages Gender  CMSMessages FirstName  CMSMessages LastName               write every subscriber to the file         var resourceManager   new ResourceManager typeof CMSMessages            foreach  var record in filterRecords Select x   gt  x First   Subscriber                         Response Write String Format   0   1   2   3    record EmailAddress  record Gender HasValue   resourceManager GetString record Gender ToString          record FirstName  record LastName                       Response End

User · Answer

yan kun was on the right track but this is much much easier       public FileContentResult DownloadCSV                 string csv    Charlie  Chaplin  Chuckles           return File new System Text UTF8Encoding   GetBytes csv    text csv    Report123 csv

User · Answer

Even if you have resolved your issue  here is another one try to export csv using mvc   return new FileStreamResult fileStream   text csv     FileDownloadName   fileDownloadName

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