图片文件上传, 生成高质量缩略图 (asp.net c#)
后台代码：
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;
using System.Data.SqlClient;
using System.IO;
public partial class User_UpLoadFile : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void UPbutton_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
{
string fileContentType = FileUpload1.PostedFile.ContentType;
if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg")
{
string name = FileUpload1.PostedFile.FileName; // 客户端文件路径
FileInfo file = new FileInfo(name);
string SavePath = "/upload/";
string fileExes = (System.IO.Path.GetExtension(name)).ToString().ToLower();//文件扩展名
Random ran = new Random();
int RandKey = ran.Next(9, 999);//ran.Next(start,end)
string fileName = "P" + System.DateTime.Now.ToString("yyMMddhhmm") + RandKey + fileExes;
string fileName_s = "S" + fileName.Substring(1); // 缩略图文件名称
//string fileName_sy = "sy_" + file.Name; // 水印图文件名称（文字）
//string fileName_syp = "syp_" + file.Name; // 水印图文件名称（图片）
string webFilePath = Server.MapPath(SavePath + fileName); // 服务器端文件路径
string webFilePath_s = Server.MapPath(SavePath + fileName_s); // 服务器端缩略图路径
//string webFilePath_sy = Server.MapPath("/upload/" + fileName_sy); // 服务器端带水印图路径(文字)
//string webFilePath_syp = Server.MapPath("/upload/" + fileName_syp); // 服务器端带水印图路径(图片)
//string webFilePath_sypf = Server.MapPath("/upload/shuiyin.jpg"); // 服务器端水印图路径(图片)
if (!File.Exists(webFilePath))
{
try
{
FileUpload1.SaveAs(webFilePath); // 使用 SaveAs 方法保存�
相关文档：
原文：刘武|asp.net中cookie的处理
使用中发现用Request.Cookies.Remove()无法删除cookie,google了一下发现一般是通过将过期时间设置成过去的时间来完成删除的。顺便整理下cookie的操作：
一 创建
1 单值的创建
C#-Code:
HttpCookie hc = new HttpCookie("Value");
hc.Value = "value";
Response.Appe ......
关键在上传的使用用到了upload.aspx,而这个页面默认的编码统一为utf-8,所以我们要给它改变一下。在你的web.config中增加此字段
<location path="fckeditor/editor/filemanager/connectors/aspx/upload.aspx">
<system.web>
<globalization req ......
using System;
using System.Text;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
& ......
Respose.Write("<script language='javascript'>window.open('"+ url +"');</script>");
（打开简洁窗口）：
Respose.Write("<script language='javascript'>window.open('" &nbs ......
