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DataGridView.InvalidateCell Method (Int32, Int32)

Note: This method is new in the .NET Framework version 2.0.

Invalidates the cell with the specified row and column indexes, forcing it to be repainted.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public void InvalidateCell (
	int columnIndex,
	int rowIndex
)
public void InvalidateCell (
	int columnIndex, 
	int rowIndex
)
public function InvalidateCell (
	columnIndex : int, 
	rowIndex : int
)

Parameters

columnIndex

The column index of the cell to invalidate.

rowIndex

The row index of the cell to invalidate.

Exception typeCondition

ArgumentOutOfRangeException

columnIndex is less than -1 or greater than the number of columns in the control minus 1.

-or-

rowIndex is less than -1 or greater than the number of rows in the control minus 1.

This method is useful to force a cell repaint in conditions that would not normally cause a cell to be repainted. For example, you can use this method with a custom cell type that changes its appearance as a result of external events.

For more information about painting and invalidation, see Invalidate.

The following code example illustrates how to use this method in a custom cell type that changes a cell's appearance when the user rests the mouse pointer over it. This example is part of a larger example available in How to: Customize Cells and Columns in the Windows Forms DataGridView Control by Extending Their Behavior and Appearance.

// Force the cell to repaint itself when the mouse pointer enters it.
protected override void OnMouseEnter(int rowIndex)
{
    this.DataGridView.InvalidateCell(this);
}

// Force the cell to repaint itself when the mouse pointer leaves it.
protected override void OnMouseLeave(int rowIndex)
{
    this.DataGridView.InvalidateCell(this);
}

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0
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