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HomeHomeDevelopment and...Development and...Building ExtensionsBuilding ExtensionsModulesModulesDownload from MemoryStream not workingDownload from MemoryStream not working
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3/15/2019 10:37 AM
 

Hi DNNizens,

I have this code(-behind) in the OnClick event of a LinkButton:

         string csv = SomeFunctionThatReturnsACsvString();
         Response.Clear();
         Response.Charset = string.Empty;
         Response.AddHeader("content-disposition", string.Format("attachment; filename=MyModule_{0}_{1:yyyy-MM-dd-hhmmss}.csv", ModuleId, DateTime.Now));
         Response.ContentType = "application/octet-stream";
         Response.Cache.SetCacheability(HttpCacheability.NoCache);
         StringWriter stringWriter = new StringWriter();
         HtmlTextWriter htmlTextWriter = new HtmlTextWriter(stringWriter);
         stringWriter.Write(csv);
         Response.Write(stringWriter.ToString());
         Response.End();

Works fine, but in Edit mode - NOT.

Any ideas why? Or is this a bug, and I should write an issue on GitHub?

Happy DNNing!
Michael


Michael Tobisch
DNN★MVP
dnn-Connect.org - The most vibrant community around the DNN-platform
 
New Post
3/16/2019 3:16 AM
 

Hi DNNizens,

found it. Obviously the module is getting inside an update panel when the page is switched to edit mode. Therefore a little statement in the o_n_l_o_a_d event helps:

   AJAX.RegisterPostBackControl(ExportToCsvButton);

BUT: How can I achieve this when I don't want a button - but an entry in the module's action menu? How can I register a postback control there?

      public ModuleActionCollection ModuleActions
      {
         get
         {
            ModuleActionCollection actions = new ModuleActionCollection();
            // ... some other stuff ...
            actions.Add(GetNextActionID(), Localization.GetString("ExportToCsv.Action", LocalResourceFile), "ExportToCsv");
            return actions;
         }
      }

      protected override void OnInit(EventArgs e)
      {
         AddActionHandler(MyActions_Click);
         base.OnInit(e);
      }

     private void MyActions_Click(object sender, ActionEventArgs e)
      {
         switch (e.Action.CommandName)
         {
            // ... some other stuff ...
            case "ExportToCsv":
               // code from above (first post in this thread)
               break;
            default:
               break;
         }
      }

?

Happy DNNing!
Michael


Michael Tobisch
DNN★MVP
dnn-Connect.org - The most vibrant community around the DNN-platform
 
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HomeHomeDevelopment and...Development and...Building ExtensionsBuilding ExtensionsModulesModulesDownload from MemoryStream not workingDownload from MemoryStream not working


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