c#中contextMenuStrip与datagridview使用CellMouseDown事件及treeview使用mousedown事件

 //对于datagridview使用CellMouseDown事件

private void dataGridView_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e) 
{ 
if (e.Button == MouseButtons.Right) 
{ 
   if (e.RowIndex >= 0) 
   { 
    dataGridView.ClearSelection(); 
    dataGridView.Rows[e.RowIndex].Selected = true; 
    dataGridView.CurrentCell = dataGridView.Rows[e.RowIndex].Cells[e.ColumnIndex]; 
    contextMenuStrip_ListViewItemRightClick.Show(MousePosition.X, MousePosition.Y); 
   } 
} 

}

//对于treeview可以使用mousedown事件

方法一：
private void treeView1_MouseDown(object sender, MouseEventArgs e) 
{ 
if (e.Button == MouseButtons.Right) 
{ 
TreeNode node = this.treeView1.GetNodeAt(e.Location); 
if (node != null) 
{ 
this.treeView1.SelectedNode = node; 
} 
} 
}

方法二：
void jcsTreeView1_MouseDown(object sender, MouseEventArgs e)
        {
           System.Windows.Forms.TreeViewHitTestInfo hittestinfo = this.jcsTreeView1.HitTest(e.X ,e.Y);
           if (hittestinfo.Node != null)
           {
               TreeViewHitTestLocations loc = hittestinfo.Location;
               if(loc == TreeViewHitTestLocations.Label )
                 MessageBox.Show(hittestinfo.Node.Text);
           }
        }