C#实现给图片添加日期信息的示例详解
实践过程
效果
代码
public partial class Form1 : Form { public Form1() { InitializeComponent(); } public string flag = null; PropertyItem[] pi; string TakePicDateTime; int SpaceLocation; string pdt; string ptm; Bitmap Pic; Graphics g; Thread td; private void button5_Click(object sender, EventArgs e) { Application.Exit(); } private void button1_Click(object sender, EventArgs e) { string[] IMG; listBox1.Items.Clear(); if (openFileDialog1.ShowDialog() == DialogResult.OK) { IMG = openFileDialog1.FileNames; if (IMG.Length > 0) { for (int i = 0; i < IMG.Length; i++) { listBox1.Items.Add(IMG[i]); } } androidflag = IMG.Length.ToString(); } } private void button2_Click(object sender, EventArgs e) { listBox1.Items.Clear(); flag = null; } private void button3_Click(object sender, EventArgs e) { if (foldandroiderBrowserDialog1.ShowDialog() == DialogResult.OK) 编程客栈 { txtSavePath.Text = folderBrowserDialog1.SelectedPath; } } private void button4_Click(object sender, EventArgs e) { if (flag == null || txtSavePath.Text == "") { return; } else { toolStripProgressBar1.Visible = true; td = new Thread(new ThreadStart(AddDate)); td.Start(); } } private void AddDate() { Font normalContentFont = new Font("宋体", 36, FontStyle.Bold); Color normalContentColor = Color.Red; int kk = 1; toolStripProgressBar1.Maximum = listBox1.Items.Count; toolStripProgressBar1.Minimum = 1; toolStripStatusLabel1.Text = "开始添加数码相片拍摄日期"; for (int i = 0; i < listBox1.Items.Count; i++) { pi = GetExif(listBox1.Items[i].ToString()); //获取元数据中的拍照日期时间,以字符串形式保存 TakePicDateTime = GetDateTime(pi); //分析字符串分别保存拍照日期和时间的标准格式 SpaceLocation = TakePicDateTime.IndexOf(" "); pdt = TakePicDateTime.Substring(0, SpaceLocation); pdt = pdt.Replace(":", "-"); ptm = TakePicDateTime.Substring(SpaceLocation + 1, TakePicDateTime.Length - SpaceLocation - 2); TakePicDateTime = pdt + " " + ptm; //由列表中的文件创建内存位图对象 Pic = new Bitmap(listBox1.Items[i].ToString()); //由位图对象创建Graphics对象的实例 g = Graphics.FromImage(Pic); //绘制数码照片的日期/时间 g.DrawString(TakePicDateTime, normalContentFont, new SolidBrush(normalContentColor), Pic.Width - 700, Pic.Height - 200); //将添加日期/时间戳后的图像进行保存 if (txtSavePath.Text.Length == 3) { 编程客栈 Pic.Save(txtSavePath.Text + Path.GetFileName(listBox1.Items[i].ToString())); } else { Pic.Save(txtSavePath.Text + "\\" + Path.GetFileName(listBox1.Items[i].ToString())); } //释放内存位图对象 Pic.Dispose(); toolStripProgressBar1.Value = kk; if (kk == listBox1.Items.Count) { toolStripStatusLabel1.Text = "全部数码相片拍摄日期添加成功"; toolStripProgressBar1.Visible = false; flag = null; listBox1.Items.Clear(); } kk++; } } #region 获取数码相片的拍摄日期 //获取图像文件的所有元数据属性,保存倒PropertyItem数组 public static PropertyItem[] GetExif(string fileName) { FileStream Mystream = new FileStream(fileName, FileMode.Open, FileAccess.Read); //通过指定的数据流来创建Image 开发者_JAVA学习 Image image = Image.FromStream(Mystream, true, false); return image.PropertyItems; } //遍历所有元数据,获取拍照日期/时间 private string GetDateTime(System.Drawing.Imaging.PropertyItem[] parr) { Encoding ascii = Encoding.ASCII; //遍历图像文件元数据,检索所有属性 foreach (PropertyItem pp in parr) { //如果是PropertyTagDateTime,则返回该属性所对应的值 if (pp.Id == 0x0132) { return ascii.GetString(pp.Value); } } //若没有相关的EXIF信息则返回N/A return "N/A"; } #endregion private void Form1_Load(object sender, EventArgs e) { CheckForIllegalCrossThreadCalls = false; } private void Form1_FormClosed(object sender, FormClosedEventArgs e) { if (td != null) { td.Abort(); } }js }
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