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DataGrid.OnMouseDown Method

Raises the MouseDown event.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

protected override void OnMouseDown(
	MouseEventArgs e


Type: System.Windows.Forms.MouseEventArgs

A MouseEventArgs that contains data about the OnMouseDown event.

Raising an event invokes the event handler through a delegate. For an overview, see Raising an Event.

Notes to Inheritors

When overriding OnMouseDown in a derived class, be sure to call the base class's OnMouseDown method.

The following code example demonstrates the use of this member.

public class MyDataGrid : DataGrid 
    // Override the OnMouseDown event to select the whole row 
    // when the user clicks anywhere on a row. 
    protected override void OnMouseDown(MouseEventArgs e) 
        // Get the HitTestInfo to return the row and pass 
        // that value to the IsSelected property of the DataGrid.
        DataGrid.HitTestInfo hit = this.HitTest(e.X, e.Y);
        if (hit.Row < 0)
        if (this.IsSelected(hit.Row))

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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