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The author:(作者)qqpublished in(发表于) 2014/7/11 9:16:00 C#中CheckedListBox控件应用实例
C#中CheckedListBox控件应用实例
CheckedListBox控件1. 功能CheckedListBox控件扩展了ListBox控件，它几乎能完成列表框可以完成的所有任务，并且还可以在列表中的项旁边显示复选标记。CheckedListBox控件与ListBox控件的主要差异在于复选列表框只能有一项选中或未选中任何项。注意，选定的项在窗体上突出显示，与已选中的项不同。图1为CheckedListBox控件。图1 CheckedListBox控件2．属性CheckedListBox 控件常用属性及说明如表1所示。表1 CheckedListBox控件常用属性及说明下面对比较重要的属性进行详细介绍。（1）Items属性。此属性用于向控件中添加项。语法：public ObjectCollection Items { get; }属性值：代表CheckedListBox中项的CheckedListBox.ObjectCollection集合。（2）CheckedItems属性。此属性是指CheckedListBox控件中所有选中项的集合。语法：public CheckedItemCollection CheckedItems { get; }属性值：CheckedListBox的CheckedListBox.CheckedItemCollection集合。示例Items属性的使用本示例实现效果为：当程序运行时，单击【确定】按钮，利用Items属性将选择的项添加到Checked ListBox 控件中。程序主要代码如下：if (this.checkBox1.Checked == True){this.checkedListBox1.Items.Add(checkBox1.Text);}if (this.checkBox2.Checked == True){this.checkedListBox1.Items.Add(checkBox2.Text);}if (this.checkBox3.Checked == True){this.checkedListBox1.Items.Add(checkBox3.Text);}3．方法CheckedListBox控件常用方法及说明如表2所示。表2 CheckedListBox控件常用方法及说明下面详细介绍SetItemCheckState方法，此方法用于设置当前的复选状态。语法：public void SetItemCheckState (int index,CheckState value)index：要为其设置状态的项的索引。value：CheckState值之一。完整程序代码如下：★★★★★主程序文件完整程序代码★★★★★using System;using System.Collections.Generic;using System.Windows.Forms;namespace _8_10{static class Program{/// /// 应用程序的主入口点。/// [STAThread]static void Main(){Application.EnableVisualStyles();Application.SetCompatibleTextRenderingDefault(false);Application.Run(new frmCheckBox());}}}★★★★★frmCheckBox窗体设计文件完整程序代码★★★★★using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace _8_10{public partial class frmCheckBox : Form{public frmCheckBox(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){if (this.checkBox1.Checked == false && this.checkBox2.Checked ==false && checkBox3.Checked == false){MessageBox.Show("至少选一项爱好");return;}if (radioButton1.Checked == false && radioButton2.Checked == false){MessageBox.Show("请选择性别");return;}this.checkedListBox1.Items.Clear();//清除当前数据if (this.checkBox1.Checked == true){this.checkedListBox1.Items.Add(checkBox1.Text);}if (this.checkBox2.Checked == true){this.checkedListBox1.Items.Add(checkBox2.Text);}if (this.checkBox3.Checked == true){this.checkedListBox1.Items.Add(checkBox3.Text);}if (this.radioButton1.Checked == true){this.checkedListBox1.Items.Add(radioButton1.Text);}if (this.radioButton2.Checked == true){this.checkedListBox1.Items.Add(radioButton2.Text);}this.checkBox1.Checked = false;this.checkBox2.Checked = false;this.checkBox3.Checked = false;
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