1.添加项checkedListBox1.Items.Add("蓝色");
checkedListBox1.Items.Add("红色");
checkedListBox1.Items.Add("黄色");2.
判断第i项是否选中,选中为true,否则为falseif（checkedListBox1.GetItemChecked(i)）{return true;}else{return false;}3.
设置第i项是否选中checkedListBox1.SetItemChecked(i, true); //true改为false为没有选中。4.
设置全选
添加一个名为select_all的checkbox控件，由其控制checkedListBox是全选还是全不选。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 ，并将选中的项的文本组合成为一个字符串。string strCollected = string.Empty;for (int i = 0; i < checkedListBox1.Items.Count; i++){if (checkedListBox1.GetItemChecked(i)){if (strCollected == string.Empty){strCollected = checkedListBox1.GetItemText(checkedListBox1.Items[i]);}else{strCollected = strCollected + "/" + checkedListBox1.GetItemText(checkedListBox1.Items[i]);}}}6.设置CheckedListBox中第i项的Checked状态
checkedListBox1.SetItemCheckState(i, CheckState.Checked);7.
private void checkBoxAll_CheckedChanged(object sender, EventArgs e)
{ if (checkBoxAll.Checked) { //被选择了则将CheckedListBox中的所有条目都变为Checked状态 for (int i = 0; i < checkedListBoxLayerControl.Items.Count;i++) {    checkedListBoxLayerControl.SetItemCheckState(i,CheckState.Checked);
}}
else
{ //否则变成Unchecked状态 for (int i = 0;i < checkedListBoxLayerControl.Items.Count; i++)
{checkedListBoxLayerControl.SetItemCheckState(i, CheckState.Unchecked);}             }
}8.
checkedListBox 单选设置(代码实现)private void chkl_ItemAuditing_ItemCheck(object sender,   ItemCheckEventArgs e)
{ if (chkl_ItemAuditing.CheckedItems.Count > 0) { for (int i = 0; i < chkl_ItemAuditing.Items.Count; i++) {if (i != e.Index)
{
this.chkl_ItemAuditing.SetItemCheckState(i,System.Windows.Forms.CheckState.Unchecked);
}}
}}9.
checkedListBox1显示一个数据库中关键字对应的所有记录for (int i = 0; i < table.Rows.Count; i++)
{ string name = table.Rows["myname"].ToString(); string paw = table.Rows["mypaw"].ToString(); checkedListBox1.Items.Add(name + paw);
}10.
for(i=0;i<CheckedListBox.Items.Count;i++)
{   if(CheckedListBox.GetItemText(CheckedListBox.Items)=="你得到的值")
{   CheckedListBox.SetItemChecked(i,true);
}  }11.清除checkedListBox1中所有的选项for (int i = 0; i < checkedListBox1.Items.Count; i++){checkedListBox1.Items.Clear();}12.//设置索引为index的项为选中状态for (int i = 0; i < checkedListBox1.Items.Count; i++){checkedListBox1.SetItemChecked(i, true);}13.
for (int i = 0; i < checkedListBox1.Items.Count; i++)
{if (checkedListBox1.GetSelected(i)){MessageBox.Show(checkedListBox1.CheckedItems.ToString());}}14.//选中checkedListBox1所有的选项for (int i = 0; i < checkedListBox1.Items.Count; i++)
{checkedListBox1.SetItemCheckState(i, CheckState.Checked);}15.
for (int i = 0; i < checkedListBox1.Items.Count; i++)
{//如果checkedListBox1的第i项被选中，//则显示checkedListBox1对应的值if (checkedListBox1.GetItemChecked(i))
{ MessageBox.Show(checkedListBox1.Items.ToString());
}}16.//反向选择checkedListBox1的选项for (int i = 0; i < checkedListBox1.Items.Count; i++)
{ if (checkedListBox1.GetItemChecked(i)) { checkedListBox1.SetItemChecked(i, false); } else { checkedListBox1.SetItemChecked(i, true); }
}17.//checkedListBox1中选定的项->checkedListBox2for (int i = 0; i < checkedListBox1.CheckedItems.Count; i++)
{ checkedListBox2.Items.Add(this.checkedListBox1.CheckedItems);//remove是除去一个具体的值，不是index，注意了this.checkedListBox1.Items.Remove(this.checkedListBox1.CheckedItems);
}18.CheckedlistBox控件比较有用到两个属性分别为CheckOnClick为True：表示单击就选中当前行，为False：要点两下才可以选中。(默认值为False)。还有一个属性为ThreeDCheckBoxes为True:表示三维的选中标记，为False:表示表面的显示标记。(默认值为False)。19.for (int i = 0; i < checkedListBox1.Items.Count; i++){if (checkedListBox1.GetItemChecked(i)){checkedListBox1.SelectedIndex = i;//利用SelectedValue取得Value值时，只能取得当前焦点项的值。所以要对整个CheckedListBox中的所有勾选项,让其都做一次焦点项才能取得所有勾选的项的值。str+=  checkedListBox1.SelectedValue;}}20.绑定数据checkedListBox1.DataSource = dt;
checkedListBox1.DisplayMember = "item";
checkedListBox1.ValueMember = "code";