asp.net图片上传示例【转】
.aspx代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>asp.net图片上传示例</title>
</head>
<body>
<form runat="server">
<div>
<asp:Button runat="server" Text="上传图片" OnClick="btnUp_Click" />
<asp:FileUpload runat="server" /></div>
</form>
</body>
</html>
.cs代码：
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
/// <summary>
/// 当没有选择图片时，使用默认图片。为了保存在数据库中。
/// </summary>
/// <returns></returns>
private string getimagepath()
{
try
{
return this.picupload.HasFile ? picupload.FileName : "nopic.jpg";
}
catch
{
return "nopic.jpg";
}
}
protected void submitBt_Click(object sender, EventArgs e)
{
}
protected void btnUp_Click(object sender, EventArgs e)
{
string savePath = @"images/teachers/";//图片保存路径
string fileName = Server.HtmlEncode(this.getimagepath());
string extension = System.IO.Path.GetExtension(fileName);//取得扩展名
string ImageName = "";
if (fileName != "nopic.gif")
{
if ((extension == ".jpg") | (extension == ".gif"))
{
ImageName = DateTime.Now.ToString("yyyyMMddhhmmssfff") + extension;
savePath += ImageName;
savePath = Server.MapPath(savePath);
}
else
{
Response.Write("<script>alert('文件上传格式错误');history.back(1);</script>");
Response.End();
}
}
else
{
ImageName = fileName;
}
string imagepath = ImageName;
if (fileName != "nopic.gif")
{
picupload.SaveAs(savePath);
}
Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", "<script>alert('图片上传成功!')</script>", false);
}
}
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