WinForm批量图片格式转换完整源码（支持.bmp . jpg.png .gif 图片格式）

namespace PictureBatchConversion
{
    public partial class Form1 : Form{
    public Form1(){
    InitializeComponent();}string[] path1=null;                 //用于存储选择的文件列表string path2="";                    //用于存储保存的路径Bitmap bt;                          //声明一个转换图片格式的Bitmap对象Thread td;                          //声明一个线程int Imgtype1;                       //声明一个变量用于标记ConvertImage方法中转换的类型string OlePath;                     //声明一个变量用于存储ConvertImage方法中原始图片的路径string path;                        //声明一个变量用于存储ConvertImage方法中转换后图片的保存路径int flags;                           //用于标记已转换图片的数量，用于计算转换进度private void Form2_Load(object sender, EventArgs e) {
    tscbType.SelectedIndex = 0;             //设置第一个转换类型被选中CheckForIllegalCrossThreadCalls = false;//屏蔽线程弹出的错误提示}private void toolStripButton3_Click(object sender, EventArgs e)//选择转换文件的按钮{
    if (openFileDialog1.ShowDialog() == DialogResult.OK)        //判断是否选择文件{
    listView1.Items.Clear();                                //清空listView1string[] info = new string[7];                          //存储每一行数据FileInfo fi;                                            //创建一个FileInfo对象，用于获取图片信息path1 = openFileDialog1.FileNames;                      //获取选择的图片集合for (int i = 0; i < path1.Length; i++)                  //读取集合中的内容{
    //获取图片名称string ImgName = path1[i].Substring(path1[i].LastIndexOf("\\") + 1, path1[i].Length - path1[i].LastIndexOf("\\") - 1);//获取图片类型string ImgType = ImgName.Substring(ImgName.LastIndexOf(".") + 1, ImgName.Length - ImgName.LastIndexOf(".") - 1);fi = new FileInfo(path1[i].ToString());             //实例化FileInfo对象//将每一行数据第一个位置的图标添加到imageList1中imageList1.Images.Add(ImgName,Properties.Resources.图标__23_);info[1] = ImgName;                      //图片名称info[2] = ImgType;                      //图片类型info[3] = fi.LastWriteTime.ToShortDateString();//图片最后修改日期info[4] = path1[i].ToString();                  //图片位置info[5] = (fi.Length/1024)+"KB";                //图片大小info[6] = "未转换";                                //图片状态ListViewItem lvi = new ListViewItem(info, ImgName);  //实例化ListViewItem对象listView1.Items.Add(lvi);                              //将信息添加到listView1控件中}tsslFileNum.Text = "当前共有" + path1.Length.ToString() + "个文件";//状态栏中显示图片数量}}private void toolStripButton2_Click(object sender, EventArgs e) //关闭按钮{
    Application.Exit();                                         //退出系统}private void toolStripButton5_Click(object sender, EventArgs e) //清空列表的按钮{
       listView1.Items.Clear();                                        //清空列表path1 = null;                                                   //清空图片的集合tsslFileNum.Text = "当前没有文件";                                 //状态栏中提示tsslPlan.Text = "";                                                 //清空进度数字}private void toolStripButton1_Click(object sender, EventArgs e){
    if (path1 == null)                                              //判断是否选择图片{
    MessageBox.Show("请选择图片！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);}else{
    if (path2.Length == 0)                                      //判断是否选择保存位置{
    MessageBox.Show("请选择保存位置！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);}else{
    flags = 1;                                              //初始化flags变量为1，用于计算进度toolStrip1.Enabled = false;                             //当转换开始时，禁用工具栏int flag = tscbType.SelectedIndex;                      //判断将图片转换为何种格式switch (flag)                                           //根据不同的格式进行转换{
    case 0:Imgtype1 = 0;                                   //如果选择第一项则转换为BMP格式td = new Thread(new ThreadStart(ConvertImage)); //通过线程调用ConvertImage方法进行转换td.Start();break;case 1:                                             //如果选择第二项则转换为JPG格式Imgtype1 = 1;td = new Thread(new ThreadStart(ConvertImage));//通过线程调用ConvertImage方法进行转换td.Start();break;case 2:                                            //如果选择第三项则转换为PNG格式Imgtype1 = 2;td = new Thread(new ThreadStart(ConvertImage));//通过线程调用ConvertImage方法进行转换td.Start();break;case 3:                                             //如果选择第四项则转换为GIF格式Imgtype1 = 3;td = new Thread(new ThreadStart(ConvertImage));//通过线程调用ConvertImage方法进行转换td.Start();break;default: td.Abort(); break;}}}}private void toolStripButton4_Click(object sender, EventArgs e)//选择保存路径按钮{
    if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)   //判断是否选择保存路径{
    path2 = folderBrowserDialog1.SelectedPath;              //获取保存路径}}private void ConvertImage(){
    flags = 1;switch (Imgtype1){
    case 0: for (int i = 0; i < path1.Length; i++){
    string ImgName = path1[i].Substring(path1[i].LastIndexOf("\\") + 1, path1[i].Length - path1[i].LastIndexOf("\\") - 1);ImgName = ImgName.Remove(ImgName.LastIndexOf("."));OlePath = path1[i].ToString();bt = new Bitmap(OlePath);path = path2 + "\\" + ImgName + ".bmp";bt.Save(path, System.Drawing.Imaging.ImageFormat.Bmp);listView1.Items[flags - 1].SubItems[6].Text = "已转换";tsslPlan.Text = "正在转换"+flags*100/path1.Length+"%";if (flags == path1.Length){
    toolStrip1.Enabled = true;tsslPlan.Text = "图片转换全部完成";}flags++;}break;case 1:for (int i = 0; i < path1.Length; i++){
    string ImgName = path1[i].Substring(path1[i].LastIndexOf("\\") + 1, path1[i].Length - path1[i].LastIndexOf("\\") - 1);ImgName = ImgName.Remove(ImgName.LastIndexOf("."));OlePath = path1[i].ToString();bt = new Bitmap(OlePath);path = path2 + "\\" + ImgName + ".jpeg";bt.Save(path, System.Drawing.Imaging.ImageFormat.Jpeg);listView1.Items[flags - 1].SubItems[6].Text = "已转换";tsslPlan.Text = "正在转换" + flags * 100 / path1.Length + "%";if (flags == path1.Length){
    toolStrip1.Enabled = true;tsslPlan.Text = "图片转换全部完成";}flags++;}break;case 2:for (int i = 0; i < path1.Length; i++){
    string ImgName = path1[i].Substring(path1[i].LastIndexOf("\\") + 1, path1[i].Length - path1[i].LastIndexOf("\\") - 1);ImgName = ImgName.Remove(ImgName.LastIndexOf("."));OlePath = path1[i].ToString();bt = new Bitmap(OlePath);path = path2 + "\\" + ImgName + ".png";bt.Save(path, System.Drawing.Imaging.ImageFormat.Png);listView1.Items[flags - 1].SubItems[6].Text = "已转换";tsslPlan.Text = "正在转换" + flags * 100 / path1.Length + "%";if (flags == path1.Length){
    toolStrip1.Enabled = true;tsslPlan.Text = "图片转换全部完成";}flags++;}break;case 3:for (int i = 0; i < path1.Length; i++){
    string ImgName = path1[i].Substring(path1[i].LastIndexOf("\\") + 1, path1[i].Length - path1[i].LastIndexOf("\\") - 1);ImgName = ImgName.Remove(ImgName.LastIndexOf("."));OlePath = path1[i].ToString();bt = new Bitmap(OlePath);path = path2 + "\\" + ImgName + ".gif";bt.Save(path, System.Drawing.Imaging.ImageFormat.Gif);listView1.Items[flags - 1].SubItems[6].Text = "已转换";tsslPlan.Text = "正在转换" + flags * 100 / path1.Length + "%";if (flags == path1.Length){
    toolStrip1.Enabled = true;tsslPlan.Text = "图片转换全部完成";}flags++;}break;default: bt.Dispose(); break;}}private void Form2_FormClosed(object sender, FormClosedEventArgs e)//关闭窗口时要关闭线程{
    if (td != null)                                                 //判断是否存在线程{
    if (td.ThreadState == ThreadState.Running)                  //然后判断线程是否正在运行{
    td.Abort();                                             //如果运行则关闭线程}}}}
}