C#如何保存picturebox上的图片，并且保存picturebox上的label控件

Question

大家好，请教大家，我想保存picturebox上的图像，图像上其实有label控件编辑的文字，但是怎么也显示不了上面的文字，怎么办，请教大家指点，谢谢

Answer 1

我就是简单的在form中加入一个picturebox1控件，控件中加入一个图片，后来又加一个label1控件，文字能够显示在picturebox上，但是保存，却保存不到一起，我的程序大概这样的，
private void Form1_Load(object sender, EventArgs e)
        {
           
            pictureBox1.Controls.Add(label1);
         
            pictureBox1.Controls.Add(label9);
            label1.BackColor = Color.Transparent;//透明底色 
            label1.Location = new Point(885, 100);
            label1.AutoSize = true;
        }     点击button 进行保存
      private void button1_Click(object sender, EventArgs e)
        {
            bool isSave = true;
            SaveFileDialog saveImageDialog = new SaveFileDialog();
            saveImageDialog.Title = "图片保存";
            saveImageDialog.Filter = @"jpeg|*.jpg|bmp|*.bmp|gif|*.gif";
            if (saveImageDialog.ShowDialog() == DialogResult.OK)
            {
                string fileName = saveImageDialog.FileName.ToString();                if (fileName != "" && fileName != null)
                {
                    string fileExtName = fileName.Substring(fileName.LastIndexOf(".") + 1).ToString();                    System.Drawing.Imaging.ImageFormat imgformat = null;                    if (fileExtName != "")
                    {
                        switch (fileExtName)
                        {
                            case "jpg":
                                imgformat = System.Drawing.Imaging.ImageFormat.Jpeg;
                                break;
                            case "bmp":
                                imgformat = System.Drawing.Imaging.ImageFormat.Bmp;
                                break;
                            case "gif":
                                imgformat = System.Drawing.Imaging.ImageFormat.Gif;
                                break;
                            default:
                                MessageBox.Show("只能存取为: jpg,bmp,gif 格式");
                                isSave = false;
                                break;
                        }
                        //默认保存为JPG格式   
                        if (imgformat == null)
                        {
                            imgformat = System.Drawing.Imaging.ImageFormat.Jpeg;
                        }                        if (isSave)
                        {
                            try
                            {
                               
                                   
                                Bitmap bit = new Bitmap(pictureBox1.Width, pictureBox1.Height);
                                Graphics g = Graphics.FromImage(bit);//从指定的 Image 创建新的 Graphics(绘图)。
                                g.DrawImage(pictureBox1.Image, new Rectangle(0, 0, bit.Width, bit.Height), new Rectangle(0, 0, pictureBox1.Width, pictureBox1.Height), GraphicsUnit.Pixel);
                               
                                
                                
                               pictureBox1.Image.Save(fileName, imgformat);
                                MessageBox.Show("图片已经成功保存!");   
                            }
                            catch
                            {
                                MessageBox.Show("保存失败,你还没有截取过图片或已经清空图片!");
                            }
                        }   
                    
                    }
                }
            }
        }

Answer 2

直接上图片上写字，不要通过label实现。
 Graphics g = Graphics.FromImage(pictureBox1.Image);
            Pen pen=new Pen(Color.Crimson);
            Brush brush=new SolidBrush(Color.Cyan);
            Font drawFont = new Font("Arial", 10, FontStyle.Bold, GraphicsUnit.Millimeter);
            g.DrawString("求分求鼓励", drawFont, brush, 0, 0);
            pictureBox1.Image.Save(@"C:\Users\ll\Desktop\1.jpg");

Answer 3

或者可以调用API 函数 截屏保存图片

Answer 4

  private void btnSave_Click(object sender, EventArgs e)
        {
            Image img = (Image)pictureBox1.Image.Clone();
            using (Brush brush = new SolidBrush(label1.ForeColor))
            using (Graphics g = Graphics.FromImage(img))
            {
                Rectangle rect = new Rectangle(label1.Left - pictureBox1.Left, label1.Top- pictureBox1.Top, label1.Width, label1.Height);
                if (label1.BackColor != Color.Transparent)
                {
                    using (Brush bgBrush = new SolidBrush(label1.BackColor))
                    {
                        g.FillRectangle(bgBrush, rect);
                    }
                }
                g.DrawString(label1.Text, label1.Font, brush, rect, StringFormat.GenericDefault);
                g.Save();
            }
            img.Save("d:\\abc.png", System.Drawing.Imaging.ImageFormat.Png);
        }

Answer 5

你Label只是在Picturebox控件上而已，不代表在图片上有这个东西啊，你如果要保证图片有你写的东西，你应该使用GDI来把字符串画到这张图片的指定位置了，具体第六楼的代码的