我可以在一系列图片上添加水印吗? [英] Can i add watermark on a series of pictures?

问题描述

我有大量图片，我想通过在它们上添加水印来保护"它们.有没有办法使用 vb.net 或 C# 添加水印?

I have a strong amount of pictures, which i would like to "protect" by adding watermark on them. Is there any way of adding watermark by using vb.net or C# ?

推荐答案

public void AddWatermark(string filename, string watermarkText, Stream outputStream) {
    Bitmap bitmap = Bitmap.FromFile(filename);
    Font font = new Font("Arial", 20, FontStyle.Bold, GraphicsUnit.Pixel);
    Color color = Color.FromArgb(10, 0, 0, 0); //Adds a black watermark with a low alpha value (almost transparent).
    Point atPoint = new Point(100, 100); //The pixel point to draw the watermark at (this example puts it at 100, 100 (x, y)).
    SolidBrush brush = new SolidBrush(color);

    Graphics graphics = null;
    try {
        graphics = Graphics.FromImage(bitmap);
    } catch {
        Bitmap temp = bitmap;
        bitmap = new Bitmap(bitmap.Width, bitmap.Height);
        graphics = Graphics.FromImage(bitmap);
        graphics.DrawImage(temp, new Rectangle(0, 0, bitmap.Width, bitmap.Height), 0, 0, bitmap.Width, bitmap.Height, GraphicsUnit.Pixel);
        temp.Dispose();
    }

    graphics.DrawString(text, font, brush, atPoint);
    graphics.Dispose();

    bitmap.Save(outputStream);
}

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