How to maintain expanded state of groups in printing in WPF DataGrid (SfDataGrid)?
All the groups will be printed in expanded state by default in WPF DataGrid (SfDataGrid). You can also avoid this and maintain the expanded states of group as in view when printing by inheriting the GridPrintManager and overriding the GetSourceListForPrinting method.
Refer to the following code sample for assigning source list for printing.
dataGrid.PrintSettings.PrintManagerBase = new CustomPrintManagerBase(dataGrid);
dataGrid.ShowPrintPreview();
public class CustomPrintManagerBase : GridPrintManager
{
public CustomPrintManagerBase(SfDataGrid dataGrid) : base(dataGrid)
{
}
protected override IList GetSourceListForPrinting()
{
if (View.GroupDescriptions.Any())
{
var records = ToIEnumerable(View.TopLevelGroup.GetEnumerator()).ToList();
List<NodeEntry> expandedGroups = new List<NodeEntry>();
foreach(var record in records)
{
if(record is RecordEntry)
{
var group = record.Parent as Group;
if (group != null && group.IsExpanded)
expandedGroups.Add(record);
}
else if(record is Group)
{
var group = record as Group;
if(group.IsTopLevelGroup || group.Level == 1)
{
expandedGroups.Add(group);
}
//For Multi-ColumnGrouping
else
{
var parentGroup = group.Parent as Group;
if (parentGroup != null && parentGroup.IsExpanded)
expandedGroups.Add(group);
}
}
}
return expandedGroups;
}
return base.GetSourceListForPrinting();
}
}
View WPF DataGrid Grouping Demo in GitHub
Conclusion
I hope you enjoyed learning about how to maintain expanded state of groups in printing in WPF DataGrid (SfDataGrid).
You can refer to our WPF DataGrid feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our WPF DataGrid example to understand how to create and manipulate data.
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