Question

上传文件代码问题

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Collections.Generic;
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;

public partial class UploadFile : System.Web.UI.Page
{
string strUser;
protected void Page_Load(object sender, EventArgs e)
{
strUser = Request.QueryString["username"];
}
protected void btnUpload_Click(object sender, EventArgs e)
{
string strFlieName;
string strFileType;
Random ran = new Random();
//filename由时间加三位随机数组成
string strFileISN = DateTime.Now.ToString("yyyyMMddhhmmss") + ran.Next(0, 999);
string strSq1;
int iFileSize;
if (FileUpload1.PostedFile.FileName != null)
{
//存在上传文件
strFlieName = FileUpload1.PostedFile.FileName;
strFileType = strFlieName.Substring(strFlieName.LastIndexOf(".") + 1);
strFlieName = strFlieName.Substring(strFlieName.LastIndexOf("\\") + 1);
iFileSize = FileUpload1.PostedFile.ContentLength;
try
{
#region 判断保存的文件是否存在
string strUpPath = @"uploadfiles\";
//文件夹不存在的时候，创建文件夹
if (!System.IO.Directory.Exists(Server.MapPath(strUpPath)))
{
System.IO.Directory.CreateDirectory(Server.MapPath(strUpPath));
}
string strUrl = Server.MapPath(strUpPath + @"\" + this.FileUpload1.FileName);
FileUpload1.SaveAs(strUrl);
lblResult.Text = "文件上传成功";
#endregion
}
catch
{
lblResult.Text = "文件上传失败";
}

Answer 1

/*前台*/
string imageurl = (new Dispose_Image()).upLoadImage(file_uploadimage, "/UploadImage/Banner"); //file_uploadimage为上传控件ID，第二个参数为需要传到的目录

(new Dispose_Image()).upLoadThumbnail(Server.MapPath(imageurl), "/UploadImage/HotPiont/Big", 308, 76);//送你个压缩



/// <summary>
        /// 错误描述
        /// </summary>
        public string error = "";
        /// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="filepath">原文件路径</param>
        /// <param name="directory ">文件保存目录</param>
        /// <returns>保存文件全路径(上传失败：返回空)</returns>
        public string upLoadImage(FileUpload fileupload, string directory)
        {
            if (fileupload == null || fileupload.PostedFile.FileName.Trim() == "")
            {
                error = "原路径不存在";
                return "";
            }
            string filepath = fileupload.PostedFile.FileName.Trim();
            if (!check_ExtendName(filepath))
            {
                error = "该文件不是图片格式的文件";
                return "";
            }
            if (!Directory.Exists(HttpContext.Current.Server.MapPath(directory))) Directory.CreateDirectory(HttpContext.Current.Server.MapPath(directory));
            directory += "/" + DateTime.Now.ToString("yyyyMMddHHmmss") + new Random().Next(1000) + Path.GetExtension(filepath);
            System.Drawing.Image img = null;
            try
            {
                img = System.Drawing.Image.FromStream(fileupload.PostedFile.InputStream);
                img.Save(HttpContext.Current.Server.MapPath(directory));
                img.Dispose();
                return directory;
            }
            catch
            {
                error = "该文件损坏或丢失";
                return "";
            }
        }
        /// <summary>
        /// 判断所选的文件是不是允许上传的文件
        /// </summary>
        /// <param name="extendName"></param>
        /// <returns></returns>
        private bool check_ExtendName(string filepath)
        {
            string extName = System.IO.Path.GetExtension(filepath);
            string[] extendNames = { ".jpg", ".jpge", ".gif", ".bmp", ".png" };
            foreach (string tempextName in extendNames)
            {
                if (tempextName.Trim().ToLower() == extName.Trim().ToLower())
                {
                    return true;
                }
            }
            return false;
        }


 /// <summary>
        /// 生成缩略图
        /// </summary>
        /// <param name="SavePath">原图的完整路径</param>
        /// <param name="sThumb">缩略图名的文件夹名</param>
        /// <param name="sSavePath">生成缩略图的路径</param>
        /// <param name="intThumbWidth">缩略图的宽度</param>
        /// <param name="intThumbHeight">缩略图的高度</param>
        /// <param name="sextendName">缩略图的后缀名</param>
        /// <returns></returns>
        public string upLoadThumbnail(string SavePath, string sSavePath, int intThumbWidth, int intThumbHeight)
        {
            string name = System.IO.Path.GetFileName(SavePath);
            string smallImagePath = System.Web.HttpContext.Current.Server.MapPath(string.Format("{0}/{1}", sSavePath, name));
            MagickNet.Image img = new MagickNet.Image(SavePath);
            System.Drawing.Image image = System.Drawing.Image.FromFile(SavePath);
            image.Dispose();
            img.Resize(new System.Drawing.Size(intThumbWidth, intThumbHeight));
            img.Write(smallImagePath);
            MagickNet.Magick.Term();
            return "";
        }

追问

你好 我私信了你一下，能帮我看看是哪里出问题了吗？