转载（忘记出处）给图片加水印的方法

加图片水印：

/**///// <summary>
/// 在图片上生成图片水印
/// </summary>
/// <param name="Path">原服务器图片路径</param>
/// <param name="Path_new">生成的带图片水印的图片路径</param>
/// <param name="Path_wm">水印图片路径</param>
private void AddWatermark(string Path, string Path_new, string Path_wm)
{
System.Drawing.Image image = System.Drawing.Image.FromFile(Path);
System.Drawing.Image copyImage = System.Drawing.Image.FromFile(Path_wm);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
g.DrawImage(copyImage, new System.Drawing.Rectangle(image.Width - copyImage.Width, image.Height - copyImage.Height, copyImage.Width, copyImage.Height), 0, 0, copyImage.Width+10,copyImage.Height+10, System.Drawing.GraphicsUnit.Pixel);
g.Dispose();

image.Save(Path_new);
image.Dispose();
copyImage.Dispose();

File.Delete(Path);//删除原图
}

加文字水印：

/**///// <summary>
/// 在图片上增加文字水印
/// </summary>
/// <param name="Path">原服务器图片路径</param>
/// <param name="Path_sy">生成的带文字水印的图片路径</param>
protected void AddWordWatermark(string Path, string Path_sy)
{
string addText = "测试水印";
System.Drawing.Image image = System.Drawing.Image.FromFile(Path);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
g.DrawImage(image, 0, 0, image.Width, image.Height);
System.Drawing.Font f = new System.Drawing.Font("Verdana", 16);
System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Blue);

g.DrawString(addText, f, b, 15, 15);
g.Dispose();

image.Save(Path_sy);
image.Dispose();
}
原来代码函数名称是用拼音的，我改成E文了。