How to show tooltip for Stacked Headers in WinForms DataGrid (SfDataGrid)?

About the sample

This sample illustrates how to show tooltip for Stacked Headers in WinForms DataGrid.

WinForms DataGrid (SfDataGrid) doesn’t have direct support to show tooltip for the stacked header cell. However you can use SfToolTip to show tooltip for the stacked header cells by handling SfDataGrid.TableControl.MouseMove event.

public Form1()
{
    InitializeComponent();

    this.sfDataGrid1.TableControl.MouseMove += OnTableControl_MouseMove;
}


RowColumnIndex hoveredRowcolumnIndex = new RowColumnIndex(-1, -1);
SfToolTip Tooltip = new SfToolTip();


private void OnTableControl_MouseMove(object sender, MouseEventArgs e)
{
    var rowColumnIndex = this.sfDataGrid1.TableControl.PointToCellRowColumnIndex(e.Location, true);
    if (hoveredRowcolumnIndex != rowColumnIndex && rowColumnIndex.RowIndex == 0)
    {
        Tooltip.Hide();
        if (rowColumnIndex.ColumnIndex == 0)
            Tooltip.Show("StackedHeaderCell 1");
        if (rowColumnIndex.ColumnIndex == 1)
            Tooltip.Show("StackedHeaderCell 2");
    }
    else if (rowColumnIndex.RowIndex > 0)
        Tooltip.Hide();
    hoveredRowcolumnIndex = rowColumnIndex;
}

Requirements to run the demo

Visual Studio 2015 and above versions