前台
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
</head>
<body>
<form runat="server" id="form1" method="post" enctype="multipart/form-data">
<input name="f" type="file" />
<input name="s" type="submit" />
</form>
</body>
</html>
后台
System.Web.HttpFileCollection _file = System.Web.HttpContext.Current.Request.Files;
if (_file.Count > )
{
//文件大小
long size = _file[].ContentLength;
//文件类型
string type = _file[].ContentType;
//文件名
string name = _file[].FileName;
//文件格式
string _tp = System.IO.Path.GetExtension(name); if (_tp.ToLower() == ".jpg" || _tp.ToLower() == ".jpeg" || _tp.ToLower() == ".gif" || _tp.ToLower() == ".png" || _tp.ToLower() == ".swf")
{
//获取文件流
System.IO.Stream stream = _file[].InputStream;
//保存文件
string saveName = DateTime.Now.ToString("yyyyMMddHHmmss") + _tp;
string path = DataFactory.WFile.FileUploadPath + "/upload/area/" + saveName;
// string path = Server.MapPath("images/"+savename);自己编写
_file[].SaveAs(path);
}
}
总结：
1.form 必须有runat="server"标记，
2.form 必须有enctype="multipart/form-data"标记，
3.<input type="file" />的runat="server"标记可选
完！