C# FileUpload上传视频、图片、文档，分别保存在不同的文件夹中以及下载文件的方法
aspx.cs代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
//获取文件的后缀名
string bb = System.IO.Path.GetExtension(FileUpload1.FileName).ToLower();
//文件上传后存放的路径
string image = Server.MapPath("~/File/image/");//图片
string video = Server.MapPath(" ~/File/Video/");//视频
string file = Server.MapPath("~/File/File/");//文档
//文件上传服务器时存放的路径
string serverPath = PactFilePath+"\\";
// 创建服务器上传路径
if (!Directory.Exists(serverPath))
{
Directory.CreateDirectory(serverPath);
}
if (flu_filepath.HasFile)
{
//图片、视频、文件格式自己设定，为了合成二维数组都写了6种格式
string[] Image={ ".gif", ".png", ".jpeg", ".jpg","bmp",".pic"};
string[] Video = { ".AVI", ".wma", ".rmvb", ".rm", ".flash", ".mp4"};
string[] File = { ".doc", ".txt", ".wps", ".pdf", ".rar", ".zip" };
string[,] arr = new string[3, 6] { { ".doc", ".txt", ".wps", ".pdf", ".rar", ".zip" }, { ".gif", ".png", ".jpeg", ".jpg", "bmp", ".pic" }, { ".AVI", ".wma", ".rmvb", ".rm", ".flash", ".mp4" } };
if (FileUpload1.HasFile)
{
bool break_flag = false;
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 6; j++)
{
if ((i == 0) && (bb == arr[0, j].ToString()))
{
//将文件保存到指定的位置
FileUpload1.PostedFile.SaveAs(file + FileUpload1.FileName);
break_flag = true;
break;
}
else if ((i == 1) && (bb == arr[1, j].ToString()))
{
FileUpload1.PostedFile.SaveAs(image + FileUpload1.FileName);
break_flag = true;
break;
}
else if ((i == 2) && (bb == arr[2, j].ToString()))
{
FileUpload1.PostedFile.SaveAs(video + FileUpload1.FileName);
break_flag = true;
break;
}
}
}
if (break_flag == true)
{
Response.Write("<script>alert('上传成功！')</script>");
}
else
{
Response.Write("<script>alert('上传文件格式错误！')</script>");
}
}
else
{
Response.Write("<script>alert('请选择上传文件！')<script>");
}
}
}
HTML代码
<body>
<form id="form1" runat="server">
<div>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" Text="上传" onclick="Button1_Click" />
</div>
</form>
</body>
web.config 如果上传的文件过大，记得修改配置文件，C#默认是2MB，最大可调到2097151KB大约是2G，executionTimeout设置上传时间
<configuration>
<system.web>
<httpRuntime maxRequestLength="2097151" executionTimeout="120"/> </system.web>
</configuration>
下载文件的方法：
新建一个ASPX页面
/// <summary>
/// 下载文件
/// <param name="file">下载的文件夹</param>
/// <param name="filePath">文件路径</param>
/// <param name="fileName">下载的文件全名</param>
/// </summary>
public static void DownLoadPactFile(string fileName)
{
string filePath = string.Empty;
filePath = PactFilePath +"\\"+ fileName;
if (File.Exists(filePath))
{
System.IO.FileStream dFileSM;
System.IO.BinaryReader dFileBR;
dFileSM = new System.IO.FileStream(HttpUtility.UrlDecode(filePath, System.Text.Encoding.UTF8), System.IO.FileMode.Open,
System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite);
dFileBR = new System.IO.BinaryReader(dFileSM);
//重新处理文件名
string[] name = HttpUtility.UrlDecode(filePath, System.Text.Encoding.UTF8).Split('\\');
//编码文件名
string strEdFileName = HttpUtility.UrlEncode(name[name.Length - 1], System.Text.Encoding.UTF8);
//变更Http头信息
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.Charset = "utf-8";
HttpContext.Current.Response.AddHeader("connection", "keep-alive");
HttpContext.Current.Response.ContentType = "application/octet-stream";
HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=" + strEdFileName);
HttpContext.Current.Response.AddHeader("content-length", dFileSM.Length.ToString());
//当生成的文件大小为0字节时，打开的文件为空
if (dFileSM.Length != 0)
{
HttpContext.Current.Response.BinaryWrite(dFileBR.ReadBytes((int)dFileSM.Length));
}
// 对象释放
dFileBR.Close();
dFileSM.Close();
dFileBR = null;
dFileSM = null;
}
