How to expand the group only when clicking on the expander cell arrow in CaptionSummaryRow in WPF DataGrid?
In WPF DataGrid (SfDataGrid) expands the CaptionSummaryRow when you click anywhere in the CaptionSummaryRow. You can expand the group only when clicking on the GridExpanderCell in CaptionSummaryRow by customization the GroupExpanding, GroupCollapsing and SelectionChanging events in DataGrid.
sfDataGrid.GroupExpanding += SfDataGrid_GroupExpanding;
sfDataGrid.GroupCollapsing += SfDataGrid_GroupCollapsing;
sfDataGrid.SelectionChanging += SfDataGrid_SelectionChanging;
private void SfDataGrid_GroupExpanding(object sender, GroupChangingEventArgs e)
{
var visualcontainer = this.sfDataGrid.GetVisualContainer();
var point = Mouse.GetPosition(visualcontainer);
// Get the row and column index based on the pointer position
var rowColumnIndex = visualcontainer.PointToCellRowColumnIndex(point);
// When the row index is zero, the row will be header row
if (!rowColumnIndex.IsEmpty)
{
if (rowColumnIndex.ColumnIndex > 0)
{
e.Cancel = true;
}
}
}
private void SfDataGrid_GroupCollapsing(object sender, GroupChangingEventArgs e)
{
var visualcontainer = this.sfDataGrid.GetVisualContainer();
var point = Mouse.GetPosition(visualcontainer);
// Get the row and column index based on the pointer position
var rowColumnIndex = visualcontainer.PointToCellRowColumnIndex(point);
// When the row index is zero, the row will be header row
if (!rowColumnIndex.IsEmpty)
{
if (rowColumnIndex.ColumnIndex > 0)
{
e.Cancel = true;
}
}
}
private void SfDataGrid_SelectionChanging(object sender, GridSelectionChangingEventArgs e)
{
var visualcontainer = this.sfDataGrid.GetVisualContainer();
var point = Mouse.GetPosition(visualcontainer);
// Get the row and column index based on the pointer position
var rowColumnIndex = visualcontainer.PointToCellRowColumnIndex(point);
// When the row index is zero, the row will be header row
if (!rowColumnIndex.IsEmpty)
{
// Get the RecordEntry by passing the RowIndex
var rowData = this.sfDataGrid.GetRecordEntryAtRowIndex(rowColumnIndex.RowIndex);
if (rowData == null)
return;
// Check if retrieved RecordEntry is group
if (rowData.IsGroups && rowColumnIndex.ColumnIndex > 0)
{
e.Cancel = true;
}
}
}
Take a moment to peruse the WPF DataGrid – Grouping documentation, where you can find about grouping with code examples.
Conclusion
I hope you enjoyed learning about how to expand the group only when clicking on the expander cell arrow in CaptionSummaryRow in DataGrid.
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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