Winform中实现图片格式转换(附代码下载)

梦里梦外; 2023-10-07 05:21 41阅读 0赞

## 场景 ##

选择一张照片并选择保存位置和要转换的图片格式实现图片格式转换。

项目运行效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][]

注：

博客主页：  
[https://blog.csdn.net/badao\_liumang\_qizhi][https_blog.csdn.net_badao_liumang_qizhi]  
关注公众号  
霸道的程序猿  
获取编程相关电子书、教程推送与免费下载。

## 实现 ##

新建一个窗体页面，然后设计页面布局如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1][]

选择图片按钮点击事件中

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listView1
                    string[] 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
                }
            }

选择图片保存位置按钮点击事件

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
                }
            }

开始转换按钮点击事件

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;
                        }
                    }
                }
            }

完整窗体页面代码

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 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listView1
                    string[] 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
                    }
                }
            }
        }
    }

###    代码下载 ###

[https://download.csdn.net/download/BADAO\_LIUMANG\_QIZHI/12243042][https_download.csdn.net_download_BADAO_LIUMANG_QIZHI_12243042]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200312091515244.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70
[https_blog.csdn.net_badao_liumang_qizhi]: https://blog.csdn.net/badao_liumang_qizhi
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200312091520569.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70
[https_download.csdn.net_download_BADAO_LIUMANG_QIZHI_12243042]: https://download.csdn.net/download/BADAO_LIUMANG_QIZHI/12243042