例1：
来源：http://long546324.iteye.com/blog/349946
Default.aspx文档：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!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>上传图片</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="btnFileUpload" runat="server" Text="上传"
onclick="btnFileUpload_Click" />
</div>
</form>
</body>
</html>
Default.aspx.cs文档 ：
using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq; public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{ }
protected void btnFileUpload_Click(object sender, EventArgs e)
{
Boolean fileOK = false;
//获取上传的文件名
string fileName = this.FileUpload1.FileName;
//获取物理路径
String path = Server.MapPath("~/Images/");
//判断上传控件是否上传文件
if (FileUpload1.HasFile)
{
//判断上传文件的扩展名是否为允许的扩展名".gif", ".png", ".jpeg", ".jpg" ,".bmp"
String fileExtension = System.IO.Path.GetExtension(fileName).ToLower();
String[] Extensions = { ".gif", ".png", ".jpeg", ".jpg" ,".bmp"};
for (int i = ; i < Extensions.Length; i++)
{
if (fileExtension == Extensions[i])
{
fileOK = true;
}
}
}
//如果上传文件扩展名为允许的扩展名，则将文件保存在服务器上指定的目录中
if (fileOK)
{
try
{
this.FileUpload1.PostedFile.SaveAs(path + fileName);
MessageBox( "文件上传完毕");
}
catch (Exception ex)
{
MessageBox("文件不能上传，原因：" + ex.Message);
}
}
else
{
MessageBox( "不能上传这种类型的文件");
}
} protected void MessageBox(string str)
{
Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('"+str+"');</script>");
}
}
例2：
public static bool UpFileFun(FileUpload Controlfile, string[] FileType, int FileSize, string SaveFileName)
{
string FileDir = Controlfile.PostedFile.FileName;
string FileName = FileDir.Substring(FileDir.LastIndexOf("\\") + ); //获取上传文件名称
string FileNameType = FileDir.Substring(FileDir.LastIndexOf(".") + ).ToString(); //获取上传文件类型
int FileNameSize = Controlfile.PostedFile.ContentLength; //获取上传文件大小
// 定义上传文件类型，并初始化
string Types = ""; //string strDate = DateTime.Now.ToString();//取当前时间用来修改上传文件名
//string str = strDate.Replace("/", "").Replace(":", "").Replace(" ", ""); //过滤当前时间里的特殊字符，如: - / : ,
//HttpContext.Current.Response.Write("<hr><br>" + str + "<br><br><br><hr");
string EditFileName = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss fff").Replace(" ", "_").Replace(":", "-") + Guid.NewGuid().ToString();
//string strNewFileName = Guid.NewGuid().ToString(); //HttpContext.Current.Response.Write("<hr><br>" + strNewFileName + "<br><br><br><hr"); try
{
if (FileNameSize < FileSize)
{
for (int i = ; i < FileType.Length; i++)
{
if (FileNameType == FileType[i])
{
Types = FileNameType;
}
}
if (FileNameType == Types)
{
Controlfile.PostedFile.SaveAs(HttpContext.Current.Server.MapPath(SaveFileName) + "/" + EditFileName + FileName);
return true;
}
else
{
Jscript.Alert("上传失败！上传文件类型不符合");
return false;
}
}
else
{
Jscript.Alert("上传失败！上传文件尺寸超出限制");
return false;
} }
catch
{
return false;
}
}
---------------->>>>