C# WinForm CheckedListBox控件用法总结

初次接触CheckedListBox控件一般认为：foreach (object obj in checkedListBox1.SelectedItems)即可遍历选中的值。

其实这里遍历的只是高亮的值并不是打勾的值。遍历打勾的值要用下面的代码：

for (int i = 0; i < checkedListBox1.Items.Count; i++){if (checkedListBox1.GetItemChecked(i)){MessageBox.Show(checkedListBox1.GetItemText(checkedListBox1.Items[i]));}}

添加项

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

判断第i项是否选中,选中为true,否则为false

if（checkedListBox1.GetItemChecked(i)）{return true;}else{return false;}

设置第i项是否选中

checkedListBox1.SetItemChecked(i, true); //true改为false为没有选中。

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);}}

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]);}}}

设置CheckedListBox中第i项的Checked状态

checkedListBox1.SetItemCheckState(i, CheckState.Checked);

for (int i = 0; i < checkedListBox1.Items.Count; i++){if (checkedListBox1.GetSelected(i)){MessageBox.Show(checkedListBox1.CheckedItems.ToString());}}

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);} }}

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);}}}}

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);}

你好

for(i=0;i<CheckedListBox.Items.Count;i++) {if(CheckedListBox.GetItemText(CheckedListBox.Items)=="你得到的值") {CheckedListBox.SetItemChecked(i,true); } }

清除checkedListBox1中所有的选项

for (int i = 0; i < checkedListBox1.Items.Count; i++){checkedListBox1.Items.Clear();}

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);}

选中checkedListBox1所有的选项

for (int i = 0; i < checkedListBox1.Items.Count; i++) {checkedListBox1.SetItemCheckState(i, CheckState.Checked);}

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());}}

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);}}

checkedListBox1中选定的项->checkedListBox2

for (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);}