/********* Filter *********/
//private void BuildFilters(string xmlFile, List<string> listColummns, string pageId, string filterTitle, bool isVertical)
private void BuildFilters(LoadData ld, List<string> listColummns, string filterTitle, bool isVertical)
{
Table t = new Table();
TableRow tr = new TableRow();
string pageId = ld.PageId.ToString();
// transform the ids into hash ids to send the column to memory or to get them from memory
string filterTitleHash = Generic.GetHash(filterTitle);
string pageIdHash = Generic.GetHash(pageId);
bool isDataFileChanged = IsDataFileChanged(ld.GetFilePath(), pageIdHash, filterTitleHash);
bool areFiltersNull = AreFiltersNull(listColummns, pageIdHash, filterTitleHash);
if (isDataFileChanged || areFiltersNull) // if first time that the page loads or xml file has changed
{
DataView dv = new DataView();
try
{
dv = ld.GetData();
}
catch (Exception ex)
{
loging.Error("filter", "load xml file", ex.Message, ViewState["log_file"].ToString());
}
if (dv.Count > 0)
{
foreach (string column in listColummns)
{
try
{
string columnHash = Generic.GetHash(column);
// ----------------------------
combobox_filter cbf = new combobox_filter(pageId, filterTitle, column, dv); // generate combobox
filter_sessions.SetFilterItem(pageIdHash, filterTitleHash, columnHash, cbf); // send the columns to memory
tr.Cells.Add(cbf.GetComboBox());
// set vertical filter alignment
if (isVertical) { t.Rows.Add(tr); tr = new TableRow(); }
}
catch (Exception ex)
{
loging.Error("filter", "create column", ex.Message, ViewState["log_file"].ToString());
}
}
}
}
else // else will load the data from session variables to have faster access.
{
foreach (string column in listColummns)
{
try
{
string columnHash = Generic.GetHash(column);
// ----------------------------
combobox_filter cbf = (combobox_filter)filter_sessions.GetFilterItem(pageIdHash, filterTitleHash, columnHash); // get the columns from memory
tr.Cells.Add(cbf.GetComboBox());
// set vertical filter alignment
if (isVertical) { t.Rows.Add(tr); tr = new TableRow(); }
}
catch (Exception ex)
{
loging.Error("filter", "load column", ex.Message, ViewState["log_file"].ToString());
}
}
}
// by default is horizontal
if (!isVertical) { t.Rows.Add(tr); }
filterPanel.Controls.Add(t);
}
public static void SetFilterItem(string pageIdHash, string filterTitleHash, string titleHash, combobox_filter cbf)
{
HttpContext.Current.Session["filter_item_" + pageIdHash + "_" + filterTitleHash + "_" + titleHash] = cbf;
}