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C#文件上传实例（文件上传，自动重命名，自动添加文件夹）

2011-11-08 08:08 866 查看

前台代码：ASPX
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Album_Default" %>

<!DOCTYPE
html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

</head>

<body>

<div>

<asp:FileUpload
ID="FileUpload1" runat="server" />

<asp:Button
ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />

<asp:Image
ID="Image1" runat="server" Height="100px" />

<asp:Label
ID="Label1" runat="server"></asp:Label></div>

</form>

</body>

</html>

=========================================================================
后台代码：CS

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 Album_Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)

{
Image1.Visible = false;
}
protected void Button1_Click(object sender, EventArgs e)

{
string filename = FileUpload1.FileName;
string size = FileUpload1.PostedFile.ContentLength.ToString();

string[] myfile = filename.Split('.');
string dotname = myfile[myfile.Length - 1].ToString().ToLower();

string type = FileUpload1.PostedFile.ContentType;

string type2 = filename.Substring(filename.LastIndexOf(".") + 1);

string imgpath = Server.MapPath("~/Upimg") + "\\";

string filepath = Server.MapPath("~/Upfile") + "\\";

string folder = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString();

if (type2 == "jpg" || type2 == "gif")
{
Image1.Visible = true;
if (!System.IO.Directory.Exists(imgpath + folder))

{//自动生成文件夹
System.IO.Directory.CreateDirectory(imgpath + folder);

}
Random myrdn = new Random();//产生随机数
//日期，时间，随机数和后缀名
string newfilename = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + myrdn.Next(10000).ToString()
+ "." + dotname;
FileUpload1.SaveAs(imgpath + folder + "\\" + newfilename);

string wpath = "~\\Upimg\\" + folder + "\\" + newfilename;

Image1.ImageUrl = wpath;
//FileUpload1.SaveAs(ipath);
Label1.Text = "原始文件名" + filename + "<br>存储文件名：" + newfilename + "<br>文件大小" + size + "<br>文件类型" + type2 + "<br>文件后缀" + type + "<br>文件虚拟路径" + wpath;

}
else
{
if (!System.IO.Directory.Exists(filepath + folder))

{//自动生成文件夹
System.IO.Directory.CreateDirectory(filepath + folder);

}
Random myrdn = new Random();//产生随机数
//日期，时间，随机数和后缀名
string newfilename = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + myrdn.Next(10000).ToString()
+ "." + dotname;

Image1.Visible = false;
string wpath = "Upfile\\" + folder + newfilename;

FileUpload1.SaveAs(filepath + folder + "\\" + newfilename);

Label1.Text = "原始文件名" + filename + "<br>存储文件名：" + newfilename + "<br>文件大小" + size + "<br>文件类型" + type2 + "<br>文件后缀" + type + "<br>文件虚拟路径" + wpath;

}
}
}

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