using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace _14._3._2
{
public partial class Form1 : Form
{
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.CheckedListBox checkedListBox1;
private System.Windows.Forms.ListBox listBox1;
// private System.ComponentModel.Container components;
public Form1()
{
InitializeComponent();
_InitializeComponent();
// 设置CheckedListBox.控件中的项
string[] myComponent = { "离散数学", "数据结构", "面向对象技术",
"操作系统", "计算机网络", "计算机系统结构" };
checkedListBox1.Items.AddRange(myComponent);
// 设置CheckedListBox.控件的CheckOnClick属性
checkedListBox1.CheckOnClick = true;
}
//初始化各个控件
private void _InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.textBox1 = new System.Windows.Forms.TextBox();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.checkedListBox1 = new System.Windows.Forms.CheckedListBox();
this.listBox1 = new System.Windows.Forms.ListBox();
this.textBox1.Location = new System.Drawing.Point(160, 15);
this.textBox1.Size = new System.Drawing.Size(100, 20);
this.textBox1.TabIndex = 0;
this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
this.button1.Enabled = false;
this.button1.Location = new System.Drawing.Point(160, 65);
this.button1.Size = new System.Drawing.Size(100, 30);
this.button1.TabIndex = 1;
this.button1.Text = "添加新课程";
this.button1.Click += new System.EventHandler(this.button1_Click);
this.button2.Enabled = false;
this.button2.Location = new System.Drawing.Point(160, 115);
this.button2.Size = new System.Drawing.Size(100, 30);
this.button2.TabIndex = 2;
this.button2.Text = "显示所选课程";
this.button2.Click += new System.EventHandler(this.button2_Click);
this.button3.Enabled = false;
this.button3.Location = new System.Drawing.Point(160, 165);
this.button3.Size = new System.Drawing.Size(100, 30);
this.button3.TabIndex = 3;
this.button3.Text = "保存所选课程";
this.button3.Click += new System.EventHandler(this.button3_Click);
this.checkedListBox1.Location = new System.Drawing.Point(15, 15);
this.checkedListBox1.Size = new System.Drawing.Size(140, 200);
this.checkedListBox1.TabIndex = 4;
this.checkedListBox1.ItemCheck += new
ItemCheckEventHandler(this.checkedListBox1_ItemCheck);
this.listBox1.Location = new System.Drawing.Point(265, 15);
this.listBox1.Size = new System.Drawing.Size(140, 200);
this.listBox1.TabIndex = 5;
this.ClientSize = new System.Drawing.Size(400, 230);
// 将控件添加到属性窗体中
this.Controls.AddRange(new System.Windows.Forms.Control[] {this.textBox1,
this.button1,
this.button2,
this.button3,
this.checkedListBox1,
this.listBox1});
this.Text = "课程设置";
}
private void button1_Click(object sender, System.EventArgs e)
{
if (textBox1.Text != "")
{
if (checkedListBox1.CheckedItems.Contains(textBox1.Text) == false)
{
checkedListBox1.Items.Add(textBox1.Text, CheckState.Checked);
}
textBox1.Text = "";
}
}
// 当textBox1里的文本内容发生变化时发生
private void textBox1_TextChanged(object sender, System.EventArgs e)
{
if (textBox1.Text == "")
{
button1.Enabled = false;
}
else
{
button1.Enabled = true;
}
}
// 将CheckedListBox 控件里的各项移至listBox.控件
private void button2_Click(object sender, System.EventArgs e)
{
listBox1.Items.Clear();
button3.Enabled = false;
for (int i = 0; i < checkedListBox1.CheckedItems.Count; i++)
{
listBox1.Items.Add(checkedListBox1.CheckedItems[i]);
}
if (listBox1.Items.Count > 0)
{
button3.Enabled = true;
}
}
//zql,修改checkedListBox1选项点击事件代码，原有代码错误
private void checkedListBox1_ItemCheck(object sender,ItemCheckEventArgs e)
{
if (e.NewValue == CheckState.Checked)
{
button2.Enabled = true;
}
else
{
if(checkListBox1.CheckedItems.Count == 1)
{
button2.Enabled = false;
}
}
}
// 将选中项保存，清空ListBox控件和TextBox控件，取消CheckListBox中的所有的选中项
private void button3_Click(object sender, System.EventArgs e)
{
listBox1.Items.Clear();
IEnumerator enumerator;
enumerator = checkedListBox1.CheckedIndices.GetEnumerator();
int index;
while (enumerator.MoveNext() != false)
{
index = (int)enumerator.Current;
checkedListBox1.SetItemChecked(index, false);
}
button3.Enabled = false;
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
}
