ASP.NET(c#) 图片水印

最新推荐文章于 2020-04-10 16:42:32 发布

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最新推荐文章于 2020-04-10 16:42:32 发布

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原文链接：http://www.cnblogs.com/existcQ/articles/2951879.html

本文介绍如何使用 ASP.NET 在上传的图片上添加文字或图片水印，并提供了详细的代码实现过程。

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if (FileUpload1.PostedFile.ContentType.ToLower().IndexOf("image") < 0)
{
FunctionUtility.JavaScriptHelper.Alert("上传的文件格式不正确！");
return;
}

Stream oStream = FileUpload1.PostedFile.InputStream;
System.Drawing.Image oImage = System.Drawing.Image.FromStream(oStream);

if(CheckBox1.Checked)
{
//加文字水印
Graphics g = Graphics.FromImage(oImage);
g.DrawImage(oImage, 0, 0, oImage.Width, oImage.Height);
Font f = new Font("Verdana",15);
Brush b = new SolidBrush(Color.White);
g.DrawString("http://www.itwealth.cn制作", f, b, 0, oImage.Height - 30);
g.Dispose();
}
else
{
//加图片水印
System.Drawing.Image copyImage = System.Drawing.Image.FromFile(Server.MapPath("/DesignImages/Images/SYT/Admin.jpg"));
Graphics g = Graphics.FromImage(oImage);
g.DrawImage(copyImage, new Rectangle(oImage.Width - copyImage.Width, oImage.Height - copyImage.Height, copyImage.Width, copyImage.Height), 0, 0, copyImage.Width, copyImage.Height, GraphicsUnit.Pixel);
g.Dispose();
}

string setFileName = FunctionUtility.FileHelper.GetDateTimeFileName() + ".jpg";
string oFullName = Server.MapPath("/DesignImages/Images/SYT/" + setFileName);
oImage.Save(oFullName, System.Drawing.Imaging.ImageFormat.Jpeg);
oImage.Dispose();

Image1.Visible = true;
Image1.ImageUrl = "/DesignImages/Images/SYT/" + setFileName;
FunctionUtility.JavaScriptHelper.Alert("水印加载成功！");