上传图片并显示：
aspx中：
<body>
<form id="form1" runat="server">
<div>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" Text="上传" /><br />
<asp:Image ID="Image1" runat="server" />
</div>
</form>
</body>
cs中：
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; 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) { string p = "pic/" + DateTime.Now.ToString("yyyyMMddhhmmssma") + FileUpload1.FileName; string path=Server.MapPath(p); FileUpload1.SaveAs(path);//绝对路径 Image1.ImageUrl = p;//相对路径 } }
上传图片加水印：
aspx与上相同；
cs代码：添加using drawing类
using System; using System.Collections.Generic; using System.Drawing; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Default2 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Button1.Click += Button1_Click; } void Button1_Click(object sender, EventArgs e) { System.Drawing.Image img = System.Drawing.Image.FromStream(FileUpload1.FileContent); Graphics g = Graphics.FromImage(img); string s="汉企起点网络0928"; Font f=new Font("宋体",20); Brush b=new SolidBrush(Color.Red); PointF p=new PointF(20,20); g.DrawString(s, f, b, p); string ss = "pic/" + DateTime.Now.ToString("yyyyMMddhhmmssms") + FileUpload1.FileName; img.Save(Server.MapPath(ss)); Image1.ImageUrl = ss; } }