uploadPhoto.aspx.cs

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 PhotoPatchUpload
{
public partial class uploadPhoto : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string value = "1";
if (!String.IsNullOrEmpty(Request["uploadid"]))
{
value = Request["uploadid"].ToString();
}

HttpPostedFile oFile = Request.Files["file"];
if (oFile == null || oFile.ContentLength < 1 || oFile.ContentLength > 1024 * 1024)
{
string js = "window.parent.document.getElementById('preTitle{0}').innerText = '上传失败';this.location.href='about:blank';";

Page.ClientScript.RegisterStartupScript(this.GetType(), "", string.Format(js, value), true);
}
else
{
try
{
string cFileName = GetRandomFileName(oFile.FileName);
Stream fs = oFile.InputStream;//51^aspx

byte[] by = new byte[1024];//分块读取

string jsLoad = "";

string folderPath = Server.MapPath("~/UploadFloder/");
string filePath = folderPath + cFileName;
if (!Directory.Exists(folderPath))
{
Directory.CreateDirectory(folderPath);
}

FileStream fStream = new FileStream(filePath, FileMode.Create);
int osize = fs.Read(by, 0, by.Length);
int totalNum = (int)fs.Length / by.Length;
totalNum++;
int i = 0;

while (osize > 0)
{

if (osize > 0)
{
fStream.Write(by, 0, osize);
string msg = "已经上传" + osize + "数据";
MyProgressBar.Roll(msg, ((i + 1) * 100 / totalNum), value);
}
osize = fs.Read(by, 0, by.Length);

jsLoad = "已经上传" + osize + "数据";

//fStream.Close();
//fStream.Dispose();
//string jsBlock = "";

//System.Web.HttpContext.Current.Response.Write(jsBlock);
//System.Web.HttpContext.Current.Response.Flush();
}
fStream.Close();
fStream.Dispose();
string jsBlock = "";

System.Web.HttpContext.Current.Response.Write(jsBlock);
System.Web.HttpContext.Current.Response.Flush();


}
catch
{
string js = "window.parent.document.getElementById('preTitle{0}').innerText = '上传失败';this.location.href='about:blank';";
Page.ClientScript.RegisterStartupScript(this.GetType(), "", string.Format(js, value), true);
}

}

}
///

/// 取得随机文件名
///

///
///
public string GetRandomFileName(string filename)
{
string[] files = filename.Split('.');
string exfilename = "." + files.GetValue(files.Length - 1);

char[] s = new char[]{'0','1', '2','3','4','5','6','7','8','9','A'
,'B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q'
,'R','S','T','U','V','W','X','Y','Z'};
string num = "";
Random r = new Random();
for (int i = 0; i < 4; i++)
num += s[r.Next(0, s.Length)].ToString();//51&aspx
DateTime time = DateTime.Now;
string name = time.Year.ToString()
+ time.Month.ToString().PadLeft(2, '0')
+ time.Day.ToString().PadLeft(2, '0')
+ time.Hour.ToString().PadLeft(2, '0')
+ time.Minute.ToString().PadLeft(2, '0')
+ time.Second.ToString().PadLeft(2, '0')
+ num + exfilename;
return name;
}
}
}