Web/Managers/depend/DoUpload.aspx.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;

namespace Web.Managers.depend
{
    public partial class DoUpload : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            if ((this.FileUpload1.PostedFile != null) && (this.FileUpload1.PostedFile.ContentLength > 0))
            {
                string path = base.Server.MapPath("~/images");
                string fileName = Path.GetFileName(this.FileUpload1.PostedFile.FileName);
                int ContentLength = this.FileUpload1.PostedFile.ContentLength;
                int UploadedLength = 0;
                int bufferSize = 0x400;
                byte[] buffer = new byte[bufferSize];
                using (FileStream fs = new FileStream(Path.Combine(path, fileName), FileMode.Create))
                {
                    while (UploadedLength < ContentLength)
                    {
                        int bytes = this.FileUpload1.PostedFile.InputStream.Read(buffer, 0, bufferSize);
                        fs.Write(buffer, 0, bytes);
                    }
                }
            }
        }
    }
}