C#winform练习(4)

} } }

//12.日期选择器 comboBox控件：

DropDownStyle:DropDownList

using System;

using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text;

using System.Threading.Tasks; using System.Windows.Forms;

namespace 日期选择器 {

public partial class Form1 : Form {

public Form1() {

InitializeComponent(); }

///

/// 程序加载时显示年份 ///

///

private void Form1_Load(object sender, EventArgs e) {

int year = DateTime.Now.Year; for(int i=year;i>1949;i--) {

cboYear.Items.Add(i+\年\); } }

///

/// 月份被选定时加载天 ///

///

private void cboMonth_SelectedIndexChanged(object sender, EventArgs e) {

cboDay.Items.Clear(); int day=0; //获得月份

string strMonth=cboMonth.SelectedItem.ToString().Split(new char[]{'月'},StringSplitOptions.RemoveEmptyEntries)[0]; //获得年份

string strYear = cboYear.SelectedItem.ToString().Split(new char[] { '年' }, StringSplitOptions.RemoveEmptyEntries)[0]; int year = Convert.ToInt32(strYear); int month = Convert.ToInt32(strMonth); switch(month) {

case 1: case 3: case 5: case 7: case 8: case 10:

case 12: day = 31; break; case 2:

if((year@0==0)||(year%4==0&&year0!=0)) {

day=29; } else {

day = 28; } break; default: day=30; break; }

for(int i=1;i<=day;i++) {

cboDay.Items.Add(i + \日\);

} }

///

/// 年份被选定时加载月份 ///

///

private void cboYear_SelectedIndexChanged(object sender, EventArgs e) {

cboMonth.Items.Clear(); for (int i = 1; i < 13; i++) {

cboMonth.Items.Add(i + \月\); } } } }

//13.点击列表更换图片 listBox控件： pictureBox控件：

SizeMode:Stretchimage

using System;

using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.IO; using System.Linq; using System.Text;

using System.Threading.Tasks; using System.Windows.Forms;

namespace 双击列表显示对应图片 {

public partial class Form1 : Form {

public Form1()

{

InitializeComponent(); }

private void Form1_Load(object sender, EventArgs e) {

//程序加载时显示图片名列表 for(int i=0;i

//listBox1.Items.Add(path[i]);

string fileName = Path.GetFileName(path[i]); listBox1.Items.Add(fileName); //集合中存放图片的全路径 //list.Add(path[i]); } }

//新建一个集合

//List list = new List(); //图片的全路径

string[] path = Directory.GetFiles(@\, \);

///

/// 双击更换图片 ///

///

//private void listBox1_DoubleClick(object sender, EventArgs e) //{

// pictureBox1.Image = Image.FromFile(path[listBox1.SelectedIndex]); //}

///

/// 点击更换图片 ///

///

private void listBox1_MouseClick(object sender, MouseEventArgs e) {

pictureBox1.Image = Image.FromFile(path[listBox1.SelectedIndex]); } } }

//14.单击切换音乐

在窗体内拖入一个listBox控件

using System;

using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.IO; using System.Linq; using System.Media; using System.Text;

using System.Threading.Tasks; using System.Windows.Forms;

namespace 双击切换音乐 {

public partial class Form1 : Form {

public Form1() {

InitializeComponent(); }

///

/// 在程序加载时导入歌曲名列表 ///

///

private void Form1_Load(object sender, EventArgs e) {

string[] path =

Directory.GetFiles(@\,\);

for(int i=0;i

string fileNames = Path.GetFileName(path[i]); listBox1.Items.Add(fileNames); listSongs.Add(path[i]); } }

///