WPF GridControl CoveredCells

This repository contains the samples that demonstrates various options in covered cell feature of WPF GridControl.

Creating covered cells using QueryCoveredRange event

You can also covered the range of cells by using QueryCoveredRange event. This event will be raised for all the cells and you can set the range of cells by using Range property.

//Triggering the QueryCoveredRange event
grid.QueryCoveredRange += Grid_QueryCoveredRange;

private void Grid_QueryCoveredRange(object sender, Syncfusion.Windows.Controls.Grid.GridQueryCoveredRangeEventArgs e)
{
    //Checking the cell to start covered range.
    if(e.CellRowColumnIndex.RowIndex == 2 && e.CellRowColumnIndex.ColumnIndex == 2)
    {
        //Set the range to be covered.
        e.Range = new CoveredCellInfo(2, 2, 5, 5);

        //Handled property has to be enabled to perform this customization.
        e.Handled = true;
    }
}

Find whether a cell in covered range

When you want to find a cell in covered ranges, you can use the GetCoveredCell method. If the specified cell with row index and column index is inside in GetCoveredCell, a range will be returned.

// Adding covered ranges
grid.Model.CoveredRanges.Add(new CoveredCellInfo(2, 2, 5, 5));

//Find the covered ranges
CoveredCellInfo coverRanges = grid.Model.CoveredRanges.GetCoveredCell(2, 3);
MessageBox.Show("Cover range for cell (2,3) is " + "R" + coverRanges.Left + "C" + coverRanges.Top + ":" + "R" + coverRanges.Bottom + "C" + coverRanges.Right);

Remove covered range at run time

You can remove the covered range at run time by using Clear method.

//Removing the covered range from GridControl.
grid.Model.CoveredRanges.Clear();

For example, If you want to remove the covered range at run time, create one button and set the Clear method for covered range in click event of button.

XAML

<Grid>
    <syncfusion:GridControl Name="grid" Margin="10,20,0,0" />
    <Button Height="50" Width="100" Margin="400,200,0,0" Click="Button_Click" />
</Grid>

C#

grid.Model.CoveredRanges.Add(new CoveredCellInfo(2, 2, 5, 5));
private void Button_Click(object sender, RoutedEventArgs e)
{
    grid.Model.CoveredRanges.Clear();
    grid.InvalidateCells();
}

The below image provides covered range at run time before removing

The below image provides covered range at run time after removing

Extend covered range at run time

You can extend the covered range at run time by using Add method.

For example, Create one button. Next, clear the current covered cell collection using Clear method and create new covered cell ranges by using Add method in this click event.

Note: Before extend the covered cell range, you need to clear the covered range.

//Remove the current covered cell range
grid.Model.CoveredRanges.Clear();
grid.InvalidateCells();
//Add new covered cell range
grid.Model.CoveredRanges.Add(new CoveredCellInfo(2, 2, 7, 7));

The below image provides covered range at run time before extending.

The below image provides covered range at run time after extending.