checkedListBox的具体用法

1、添加项：

checkedListBox1.Items.Add("蓝色");
checkedListBox1.Items.Add("红色");
checkedListBox1.Items.Add("黄色");

2、判断第0项是否选中

if (checkedListBox1.GetItemChecked(0))

3、设置第0项是否选中

checkedListBox1.SetItemChecked(0, true);

4、设置全选

添加一名为select_all的checkbox控件

private void select_all_CheckedChanged(object sender, EventArgs e)
        {
            if(select_all.Checked)
                for (int j = 0; j < checkedListBox1.Items.Count; j++)
                    checkedListBox1.SetItemChecked(j, true);
            else
                for (int j =0; j < checkedListBox1.Items.Count; j++)
                    checkedListBox1.SetItemChecked(j, false);

        }

5、得到全部选中的值：

private void linkLabel_yes_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            panel_friend.Visible = false;
            button_friend.Text = "好友面板";
            sms_str = null;
            for (int j = 0; j < checkedListBox1.Items.Count; j++)
        //sms_str = sms_str + checkedListBox1.SelectedItems[j].ToString().Substring(4,11);//特别注意是[j]不是（j）
                if(checkedListBox1.GetItemChecked(j))
                sms_str = sms_str + checkedListBox1.Items[j].ToString();
            sms_content.Text = sms_str;