/// <summary>
/// prepare the serialized data file for download
/// </summary>
/// <param name="mimeType"></param>
/// <returns></returns>
public ActionResult PrepareDownloadFile(string mimeType)
{
// if we have already a matching file cached, we can short circuit here
if ((null != Session[SESSION_FILE]) && ((Dictionary <string, string>)Session[SESSION_FILE]).ContainsKey(mimeType))
{
return(Json(new { error = false, mimeType = mimeType }, JsonRequestBehavior.AllowGet));
}
long selectedDataStructureId = 0;
if (Session["DataStructureId"] != null)
{
selectedDataStructureId = (long)Session["DataStructureId"];
}
// helper class
DownloadManager downloadManager = new DownloadManager();
// filename
// use unix timestamp to make filenames unique
string filename = Models.Settings.get("lui:filename:download") as string;
LUIQueryModel model = (LUIQueryModel)Session["LUICalModel"];
string mean = "";
if (model.TypeOfMean.SelectedValue != "empty")
{
mean = "_" + model.TypeOfMean.SelectedValue;
}
filename += "_" + model.ComponentsSet.SelectedValue + "_" + model.Scales.SelectedValue + mean + "_" + DateTime.Now.ToString("yyyy-MM-dd");
// datastructure ID
//int dsId = (int)Settings.get("lui:datastructure");
// depends on the requested type
string path = "";
switch (mimeType)
{
case "text/csv":
case "text/tsv":
path = downloadManager.GenerateAsciiFile(FILE_NAMESPACE, Session[SESSION_TABLE] as DataTable, filename, mimeType);
break;
case "application/vnd.ms-excel.sheet.macroEnabled.12":
case "application/vnd.ms-excel":
//path = outputDataManager.GenerateExcelFile(FILE_NAMESPACE, Session[SESSION_TABLE] as DataTable, filename, selectedDataStructureId);
break;
default:
Response.StatusCode = 420;
return(Json(new { error = true, msg = "Unknown file-type: " + mimeType }, JsonRequestBehavior.AllowGet));
}
// store path in session for further download
if (null == Session[SESSION_FILE])
{
Session[SESSION_FILE] = new Dictionary <string, string>();
}
((Dictionary <string, string>)Session[SESSION_FILE])[mimeType] = path;
return(Json(new { error = false, mimeType = mimeType }, JsonRequestBehavior.AllowGet));
}
