[ASP.NET]checklistbox控件的一些小技巧
最近用到checklistbox控件,在使用其过程中,花了较多的时间,这里我收集了其相关的代码段,希望对大家有所帮助。
//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false if(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->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); }