前台代码
<body>
<form id="form1" runat="server">
<div>
<%--上传的控件--%>
<asp:FileUpload ID="FileUpload1" runat="server" />
<%--上传按钮--%>
<asp:Button ID="Button1" runat="server" Text="上传" /><br />
<%--提示是否验证成功--%>
<asp:Image ID="Image1" runat="server" />
</div>
</form>
</body>
后台代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Button1.Click += Button1_Click;
}
void Button1_Click(object sender, EventArgs e)
{
//获得要上传的图片
System.Drawing.Image img = System.Drawing.Image.FromStream(FileUpload1.FileContent);
//加上水印
Graphics g = Graphics.FromImage(img);
string s = "WWW.ITNBA.COM";
Font f = new Font("微软雅黑", 30);
Brush b = new SolidBrush(Color.Red);
PointF pf = new PointF(50, 50);
//注意所需要的参数，在上面创建出来
g.DrawString(s, f, b, pf);
//保存下来
string path = "Uploads/" + DateTime.Now.ToString("yyyyMMddhhmmssms") + FileUpload1.FileName;
img.Save(Server.MapPath(path));
Image1.ImageUrl = path;
}
}
时间： 2024-07-30 10:17:20