线程的交叉问题:
全部代码:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Threading;
namespace BatchChangeImgFormat {
public partial class Form1: Form {
#region
private string[] picNames = null; //选择转换的所有图片路径.
private string strSavePath = null; //转换后存储的路径.
private int nFormat; //标志选择转换的格式.
private Bitmap bMap; //转换用的BitMap.
#endregion
public Form1() {
InitializeComponent();
tsbtn_Open.Click += (sender, e) => InitializeSelectedPics(sender, e); //加载图片.
this.Load += (sender, e) => { tscombox_ChangeFormat.SelectedIndex = 0; }; //初始选择第一项.
tsbtnClear.Click += (sender, e) => ClearSelectedPic(sender, e); //清空列表.
tsbtn_Save.Click += (sender, e) => StorePathAfterChanged(sender, e);//存储转换后保存图片的路径.
tsbtnStart.Click += (sender, e) => ConvertFormatSelected(sender, e); //开始转换.
tsbtnClose.Click += (sender, e) => CloseForm(sender, e); //关闭.
}
//加载需要转换的图片.
void InitializeSelectedPics(object sender, EventArgs e) {
openFD.Filter = "所有图片|*.jpg;*.jpeg;*.gif;*.bmp;*.png";
if(openFD.ShowDialog() != DialogResult.OK) return;
string[] items = new string[7]; //存储每行项的信息.
picNames = openFD.FileNames; //存储需要转换的图片.
foreach(var pic in picNames) {
FileInfo p = new FileInfo(pic);
imgList.Images.Add(p.Name, Properties.Resources.done); //显示"已完成加载"的图片.
items[1] = p.Name;
items[2] = p.Extension;
items[3] = p.CreationTime.ToLongDateString();
items[4] = p.DirectoryName;
items[5] = (p.Length / 1024) + " KB";
items[6] = "未转换";
ListViewItem lvItem = new ListViewItem(items, p.Name); //加载子项,并制定图像的键.
lv.Items.Add(lvItem);
}
labCount.Text = string.Format("共加载 {0} 张图片", picNames.Length);
}
//存储转换后保存图片的路径.
void StorePathAfterChanged(object sender, EventArgs e) {
if(folderBD.ShowDialog() != DialogResult.OK) return;
strSavePath = folderBD.SelectedPath;
}
//清空列表.
void ClearSelectedPic(object sender, EventArgs e) {
DialogResult dResult = MessageBox.Show("确认要清空当前列表?", "警告", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning);
if(dResult == DialogResult.Yes) {
picNames = null; //清除保存的图片路径.
lv.Items.Clear();
}
}
//关闭.
void CloseForm(object sender, EventArgs e) {
DialogResult dResult = MessageBox.Show("确认关闭?", "警告", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning);
if(dResult == DialogResult.Yes)
Application.Exit();
}
//单击"开始转换".
void ConvertFormatSelected(object sender, EventArgs e) {
if(lv.Items.Count <= 0) {
MessageBox.Show("请先加载图片!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
if(string.IsNullOrEmpty(strSavePath)) {
MessageBox.Show("请先选择转换后保存的路径", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return;
}
string formatSelected = (string)tscombox_ChangeFormat.SelectedItem; //选择转换的格式.
switch(formatSelected) {
case "*.jpeg":
nFormat = 0;
break;
case "*.gif":
nFormat = 1;
break;
case "*.bmp":
nFormat = 2;
break;
case "*.png":
nFormat = 3;
break;
default:
throw new ArgumentException("不支持的转换格式");
}
new Thread(new ThreadStart(ConvertImage)).Start(); //用多线程启动.
}
//图片转换方法.
void ConvertImage() {
int nSchedule = 0; //进度值.
switch(nFormat) { //用两次switch是为了用多线程.
case 0:
for(int i = 0; i < picNames.Length; i++) {
using(bMap = new Bitmap(picNames[i])) {
bMap.Save(strSavePath + "\" + Path.GetFileNameWithoutExtension(picNames[i]) + ".jpeg", System.Drawing.Imaging.ImageFormat.Jpeg);
lv.Items[nSchedule].SubItems[6].Text = "已转换";
nSchedule++;
ts_status_lab.Text = string.Format("已完成 {0} %", i * 100 / picNames.Length);
}
}
break;
case 1:
for(int i = 0; i < picNames.Length; i++) {
using(bMap = new Bitmap(picNames[i])) {
bMap.Save(strSavePath + "\" + Path.GetFileNameWithoutExtension(picNames[i]) + ".gif", System.Drawing.Imaging.ImageFormat.Gif);
lv.Items[nSchedule].SubItems[6].Text = "已转换";
nSchedule++;
ts_status_lab.Text = string.Format("已完成 {0} %", i * 100 / picNames.Length);
}
}
break;
case 2:
for(int i = 0; i < picNames.Length; i++) {
using( bMap = new Bitmap(picNames[i])) {
bMap.Save(strSavePath + "\" + Path.GetFileNameWithoutExtension(picNames[i]) + ".bmp", System.Drawing.Imaging.ImageFormat.Bmp);
lv.Items[nSchedule].SubItems[6].Text = "已转换";
nSchedule++;
ts_status_lab.Text = string.Format("已完成 {0} %", i * 100 / picNames.Length);
}
}
break;
case 3:
for(int i = 0; i < picNames.Length; i++) {
using( bMap = new Bitmap(picNames[i])) {
bMap.Save(strSavePath + "\" + Path.GetFileNameWithoutExtension(picNames[i]) + ".png", System.Drawing.Imaging.ImageFormat.Png);
lv.Items[nSchedule].SubItems[6].Text = "已转换";
nSchedule++;
ts_status_lab.Text = string.Format("已完成 {0} %", i * 100 / picNames.Length);
}
}
break;
default:
throw new ArgumentException("未知的参数");
}
if(nSchedule == picNames.Length) //此时表示完成转换.
ts_status_lab.Text = "转换已全部完成";
}
}
}
