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How to customize the record plus or minus icon in WinForms GridGroupingControl?
2 mins read
Customize the record plus or minus icon
To change the record (+/-) icon for expanding and collapsing, you can customize that cell in QueryCellStyleInfo event. Change the CellType of the plus/minus cell to ‘Static’. The icon image is applied to that cell by using ImageList. The current state of the record is retrieved through IsExpanded property.
C#
this.gridGroupingControl1.QueryCellStyleInfo += gridGroupingControl1_QueryCellStyleInfo;
ImageList img = new ImageList();
void gridGroupingControl1_QueryCellStyleInfo(object sender, GridTableCellStyleInfoEventArgs e)
{
if (e.TableCellIdentity.TableCellType == GridTableCellType.RecordPlusMinusCell) //changing the icon in RecordPlusMinusCell when expanded
{
if (e.TableCellIdentity.DisplayElement.ParentRecord.IsExpanded)
{
e.Style.CellType = GridCellTypeName.Static;
e.Style.ImageList = img;
e.Style.ImageIndex = 1;
}
else//changing the icon in RecordPlusMinusCell when collapsed
{
e.Style.CellType = GridCellTypeName.Static;
e.Style.ImageList = img;
e.Style.ImageIndex = 0;
}
}
}
VB
AddHandler Me.gridGroupingControl1.QueryCellStyleInfo, AddressOf gridGroupingControl1_QueryCellStyleInfo Private img As New ImageList() Private Sub gridGroupingControl1_QueryCellStyleInfo(ByVal sender As Object, ByVal e As GridTableCellStyleInfoEventArgs) If e.TableCellIdentity.TableCellType = GridTableCellType.RecordPlusMinusCell Then 'changing the icon in RecordPlusMinusCell when expanded If e.TableCellIdentity.DisplayElement.ParentRecord.IsExpanded Then e.Style.CellType = GridCellTypeName.Static e.Style.ImageList = img e.Style.ImageIndex = 1 Else 'changing the icon in RecordPlusMinusCell when collapsed e.Style.CellType = GridCellTypeName.Static e.Style.ImageList = img e.Style.ImageIndex = 0 End If End If End Sub
The following screenshot displays the modified icons for record plus/minus.
Figure 1: Modified icons for record plus/minus
