public static bool FOLVSaveState(FastObjectListView FOLV)
{
bool ret = false;
try
{
FOLVObjectListViewState olvState = new FOLVObjectListViewState();
olvState.VersionNumber = 1;
olvState.NumberOfColumns = FOLV.AllColumns.Count; // FOLV.AllColumns.Count
olvState.CurrentView = FOLV.View;
// If we have a sort column, it is possible that it is not currently being shown, in which
// case, it's Index will be -1. So we calculate its index directly. Technically, the sort
// column does not even have to a member of AllColumns, in which case IndexOf will return -1,
// which is works fine since we have no way of restoring such a column anyway.
if (FOLV.PrimarySortColumn != null)
{
olvState.SortColumn = FOLV.AllColumns.IndexOf(FOLV.PrimarySortColumn);// FOLV.AllColumns.IndexOf(FOLV.PrimarySortColumn)
}
olvState.LastSortOrder = FOLV.PrimarySortOrder;
olvState.IsShowingGroups = FOLV.ShowGroups;
// If FOLV.Columns.Count > 0 AndAlso FOLV.Columns(0).LastDisplayIndex = -1 Then 'FOLV.AllColumns(0).LastDisplayIndex = -1
// 'FOLV.RememberDisplayIndicies()
// End If
if (FOLV.Columns.Count == 0)
{
Log("Error: No columns to save?");
return(false);
}
foreach (OLVColumn column in FOLV.AllColumns) // FOLV.AllColumns
{
olvState.ColumnIsVisible.Add(column.IsVisible);
olvState.ColumnDisplayIndicies.Add(column.LastDisplayIndex);
olvState.ColumnWidths.Add(column.Width);
}
// Now that we have stored our state, save to json
string Filename = Path.Combine(Path.GetDirectoryName(AppSettings.Settings.SettingsFileName), $"ListSaveState-{FOLV.Name}.JSON");
string json = Global.WriteToJsonFile <FOLVObjectListViewState>(Filename, olvState);
if (json != null && !string.IsNullOrEmpty(json))
{
ret = true;
}
}
catch (Exception ex)
{
Log("Error: " + ex.Msg());
}
return(ret);
}
public static bool FOLVRestoreState(FastObjectListView FOLV)
{
bool Ret = false;
try
{
string Filename = Path.Combine(Path.GetDirectoryName(AppSettings.Settings.SettingsFileName), $"ListSaveState-{FOLV.Name}.JSON");
if (!File.Exists(Filename))
{
return(false);
}
FOLVObjectListViewState olvState = Global.ReadFromJsonFile <FOLVObjectListViewState>(Filename);
// The number of columns has changed. We have no way to match old
// columns to the new ones, so we just give up.
if (olvState == null || olvState.NumberOfColumns != FOLV.AllColumns.Count)
{
Log("Debug: olvState Is null OrElse olvState.NumberOfColumns <> FOLV.AllColumns.Count.");
return(false);
}
if (olvState.SortColumn == -1)
{
FOLV.PrimarySortColumn = null;
FOLV.PrimarySortOrder = SortOrder.None;
}
else
{
FOLV.PrimarySortColumn = FOLV.AllColumns[olvState.SortColumn]; // FOLV.AllColumns(olvState.SortColumn)
FOLV.PrimarySortOrder = olvState.LastSortOrder;
}
for (int i = 0; i <= olvState.NumberOfColumns - 1; i++)
{
OLVColumn column = FOLV.AllColumns[i]; // FOLV.AllColumns(i)
column.Width = System.Convert.ToInt32(olvState.ColumnWidths[i]);
column.IsVisible = System.Convert.ToBoolean(olvState.ColumnIsVisible[i]);
column.LastDisplayIndex = System.Convert.ToInt32(olvState.ColumnDisplayIndicies[i]);
}
// ReSharper disable RedundantCheckBeforeAssignment
if (olvState.IsShowingGroups != FOLV.ShowGroups)
{
// ReSharper restore RedundantCheckBeforeAssignment
FOLV.ShowGroups = olvState.IsShowingGroups;
}
if (FOLV.View == olvState.CurrentView)
{
FOLV.RebuildColumns();
}
else
{
FOLV.View = olvState.CurrentView;
}
//tell other functions not to resize columns unless forced
FOLV.Tag = "resizedcols";
Ret = true;
}
catch (Exception ex)
{
Log("Error: " + ex.Msg());
}
return(Ret);
}