前台：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Alum.aspx.cs" Inherits="Album_Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:FileUpload ID="fup" runat="server" />
<br />
<br />
<asp:Button ID="btnUp" Text="上传图片" runat="server" OnClick="btnUp_Click" />
<asp:Label id="lblInfo" runat="server" ForeColor="Red" Font-Size="13px" ></asp:Label>
<br />
<br />
<asp:LinkButton ID="lbnPhoto" runat="server" PostBackUrl="~/Album/Photo.aspx" Text="查看照片"></asp:LinkButton>
</div>
</form>
</body>
</html>
后台：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class Album_Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
private static bool IsAllowedExtension(FileUpload upfile)
{
string strOldFilePath = "";
string strExtension = "";
string[] arrExtension = { ".gif", ".jpg", ".bmp", ".png" };
if (upfile.PostedFile.FileName != string.Empty)
{
strOldFilePath = upfile.PostedFile.FileName;//获得文件的完整路径名
strExtension = strOldFilePath.Substring(strOldFilePath.LastIndexOf("."));//获得文件的扩展名，如：.jpg
for (int i = 0; i < arrExtension.Length; i++)
{
if (strExtension.Equals(arrExtension[i]))
{
return true;
}
}
}
return false;
}
//图片上传并将图片重命名
protected void btnUp_Click(object sender, EventArgs e)
{
myClass myclass = new myClass();
try
{
if (fup.PostedFile.FileName == "")
{
lblInfo.Text = "请选择文件！";
}
else
{
//string filepath = fup.PostedFile.FileName;
if (!IsAllowedExtension(fup))
{
lblInfo.Text = "上传文件格式不正确！";
}
if (IsAllowedExtension(fup) == true)
{
string filepath = fup.PostedFile.FileName;
string filename = filepath.Substring(filepath.LastIndexOf("\\") + 1);
string serverpath = Server.MapPath("picture/") + filename;
fup.PostedFile.SaveAs(serverpath);
serverpath = "picture/" + filename;
DateTime now = DateTime.Now;
string sql = "insert into Photo (photoname,uptime,path)values(‘" + filename + "‘,‘" + now + "‘,‘" + serverpath + "‘)";
int flag = myclass.DataSQL(sql);
if (flag == 1)
lblInfo.Text = "上传成功！";
else
lblInfo.Text = "上传失败！";
}
else
{
lblInfo.Text = "请上传图片！";
}
}
}
catch (Exception ex)
{
lblInfo.Text = "上传发生错误！原因是：" + ex.ToString();
}
}
}
可以上传图片。限制图片类型。还缺少同时上传多个文件和限制图片大小。最后补充一下看了很久的注释_(:з」∠)_。发一下马克一下。说不定魔改完就不见了。。
时间： 2024-11-05 14:52:19