/全选

        

private

 void button3_Click(object sender, EventArgs e)

        

{

            

for

 (int i = 0; i < this.checkedListBox1.Items.Count; i++)

            

{

                

this

.checkedListBox1.SetItemChecked(i, 

true

);

            

}

 

}

        

//反选

        

private

 void button4_Click(object sender, EventArgs e)

        

{

            

for

 (int i = 0; i < checkedListBox1.Items.Count; i++)

            

{

                

if

 (checkedListBox1.GetItemChecked(i))

                

{

                    

checkedListBox1.SetItemChecked(i, 

false

);

                

}

                

else

                

{

                    

checkedListBox1.SetItemChecked(i, 

true

);

                

}

            

}