请问，如何用c#在图片上加几个字符！

Question

这种想法应该能实现的，就象5460提交上去的图片全部都在右下角写上了5460

Answer 1

private void button1_Click(object sender, System.EventArgs e)
{
if(this.openFileDialog1.ShowDialog()==DialogResult.OK) { if(this.openFileDialog1.FileName.Length==0) { MessageBox.Show("请选择图片","错误",MessageBoxButtons.OK,MessageBoxIcon.Error); return; } this.textBox1.Text=this.openFileDialog1.FileName; FileStream fs=new FileStream(this.openFileDialog1.FileName,FileMode.Open,FileAccess.Read); try { this.pictureBox1.Image=Image.FromStream(fs);
} catch(Exception) { MessageBox.Show("您选择的文件不是可识别的图片格式","错误",MessageBoxButtons.OK,MessageBoxIcon.Error); } finally { fs.Close(); } }
} private void Form1_Load(object sender, System.EventArgs e)
{

} private void button2_Click(object sender, System.EventArgs e)
{
int height,width;
height = this.pictureBox1.Image.Height;
width = this.pictureBox1.Image.Width;
Bitmap bitmap=new Bitmap(width,height,System.Drawing.Imaging.PixelFormat.Format24bppRgb); //根据位图获取画布 Graphics g=Graphics.FromImage(bitmap); //清空画布并用透明色填充 g.Clear(Color.Transparent); //将另一幅图片画到画布上
             MessageBox.Show(height.ToString() + " " + width.ToString());
Rectangle rc = new Rectangle(0,0,width,height);
g.DrawImage(this.pictureBox1.Image,rc); //写版权信息到图片上。 g.DrawString(this.textBox2.Text,new Font("黑体",40),new SolidBrush(Color.Red),new Rectangle(20,20,300,300)); //显示 this.pictureBox2.Image=bitmap;
this.pictureBox2.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage; //保存图片 bitmap.Save("c:\\abc.jpg",System.Drawing.Imaging.ImageFormat.Jpeg);
            MessageBox.Show(this.pictureBox2.Image.Height.ToString() + " " + this.pictureBox2.Image.Width.ToString());
this.pictureBox3.Image = this.pictureBox1.Image;
}
}

Answer 2

OpenFileDialog dialog = new OpenFileDialog();
try
{
  if(dialog.ShowDialog() == DialogResult.OK)
  {
    Image image = Image.FromFile(dialog.FileName);
    Graphics g = Graphics.FromImage(image);
    g.DrawString("1234567",this.Font,Brushes.White,10,10);
    image.Save("1234567.jpg",ImageFormat.Jpeg);
    g.Dispose();
    image.Dispose();
  }
}
catch (Exception e1)
{
  MessageBox.Show(e1.Message);
}