单/多文件上传。

using System;
using System.IO;
using System.Configuration;
using System.Web;

namespace AspNetTest.Common

调用：

UploadFile oUploadFile = new UploadFile();
            oUploadFile.UseAbsolutePath = true;
            oUploadFile.UploadPath = "Pic";
            oUploadFile.CreateDateDir = true;
            oUploadFile.UseRandFileName = true;
            oUploadFile.Upload();