radiobutton的CheckedChanged事件与Click事件

C# code

private void radioButton1_CheckedChanged(object sender, EventArgs e) {     if (radioButton1.Checked)             {                 clsGridStyle.rdo1();                 clsCellCompute.rdo1();                 clsStatistics.rdo1();                 ListGrid.OwnerDrawCell += new FlexCell.Grid.OwnerDrawCellEventHandler(clsDrawImage.rdo1);                 ListGrid.MouseDown += new FlexCell.Grid.MouseDownEventHandler(clsMouseDown.rdo1);                 ListGrid.MouseDoubleClick += new MouseEventHandler(clsMouseDoubleClick.rdo1);                            }             else             {                 ListGrid.OwnerDrawCell -= new FlexCell.Grid.OwnerDrawCellEventHandler(clsDrawImage.rdo1);                 ListGrid.MouseDown -= new FlexCell.Grid.MouseDownEventHandler(clsMouseDown.rdo1);                 ListGrid.MouseDoubleClick -= new MouseEventHandler(clsMouseDoubleClick.rdo1);             } } 

rdo1,rdo2,rdo3,rdo4.....最初都是用的CheckedChanged事件

现改为用Click事件

C# code

private void radioButton1_Click(object sender, EventArgs e) {     if (radioButton1.Checked)             {                 clsGridStyle.rdo1();                 clsCellCompute.rdo1();                 clsStatistics.rdo1();                 ListGrid.OwnerDrawCell += new FlexCell.Grid.OwnerDrawCellEventHandler(clsDrawImage.rdo1);                 ListGrid.MouseDown += new FlexCell.Grid.MouseDownEventHandler(clsMouseDown.rdo1);                 ListGrid.MouseDoubleClick += new MouseEventHandler(clsMouseDoubleClick.rdo1);                            }             else             {                 ListGrid.OwnerDrawCell -= new FlexCell.Grid.OwnerDrawCellEventHandler(clsDrawImage.rdo1);                 ListGrid.MouseDown -= new FlexCell.Grid.MouseDownEventHandler(clsMouseDown.rdo1);                 ListGrid.MouseDoubleClick -= new MouseEventHandler(clsMouseDoubleClick.rdo1);             } } 

但是在rdo1、rdo2、rdo3....切换时，发现

C# code

ListGrid.OwnerDrawCell -= new FlexCell.Grid.OwnerDrawCellEventHandler(clsDrawImage.rdo1); ListGrid.MouseDown -= new FlexCell.Grid.MouseDownEventHandler(clsMouseDown.rdo1); ListGrid.MouseDoubleClick -= new MouseEventHandler(clsMouseDoubleClick.rdo1); 

没有执行，绘制的图片线条，发生了叠加

CheckedChanged事件 与 Click 事件有什么不同吗？如何解决呢？

[解决办法]
这是单选框，你点击它选中后，再次点击不会发生 Checked的变换