C#实现给图片添加日期信息的示例详解
作者:芝麻粒儿 时间:2021-07-29 21:19:28
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]);
}
}
flag = 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 (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
{
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)
{
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
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();
}
}
}
来源:https://zhima.blog.csdn.net/article/details/128102195
标签:C#,图片,日期,信息
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