16. 7. 20.

C#.NET 파일업로드

upload.html 파일
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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>파일업로드</title>
</head>
<body>
 <form name="form1" method="post" action="Upload.aspx" enctype="multipart/form-data">
  <input type="file" name="file1" multiple/>
  <input type="submit" value="업로드"/>
 </form>
</body>
</html>


Upload.aspx 파일
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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Upload.aspx.cs" Inherits="Upload" %>


Upload.aspx.cs 파일
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using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Web;
 
public partial class Upload : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        HttpFileCollection uploadedFiles = Request.Files;
 
        int maxFile = 10;
 
        if (uploadedFiles.Count > maxFile)
        {
            Response.Write("한번에 올릴 수 있는 파일수는 " + maxFile.ToString() + "개입니다.");
            return;
        }
 
        for (int i = 0; i < uploadedFiles.Count; i++)
        {
            HttpPostedFile userPostedFile = uploadedFiles[i];
 
            if (userPostedFile.ContentLength > 0 && !String.IsNullOrEmpty(userPostedFile.FileName))
            {
                string result = UploadFileSave(userPostedFile, i);
                if (result != "")
                {
                    // 업로드 성공
                    Response.Write(result + " ");
                }
                else
                {
                    // 업로드 실패
                }
            }
        }
    }
 
    private string UploadFileSave(HttpPostedFile SaveFile, int no)
    {
        // 저장폴더
        string wPath = Server.MapPath("/file") + "\\";
        string thumPath = Server.MapPath("/file/thum") + "\\";
        DirectoryInfo di = new DirectoryInfo(wPath);
        // 폴더가 없을 경우 생성
        if (di.Exists == false)
            di.Create();
        di = new DirectoryInfo(thumPath);
        // 폴더가 없을 경우 생성
        if (di.Exists == false)
            di.Create();
        // 확장자
        string fileType = SaveFile.FileName.Substring(SaveFile.FileName.LastIndexOf(".") + 1);
        // 변경할 파일 이름
        string saveFileName = DateTime.Now.ToString("yyyyMMddhhmmss") + '_' + no + "." + fileType;
        try
        {
            // 이미지 확장자 일 경우
            if (("jpg|jpeg|bmp|gif|png").IndexOf(fileType.ToLower()) > -1)
            {
                Bitmap img = new Bitmap(SaveFile.InputStream);
                RotateFlipType rft = RotateFlipType.RotateNoneFlipNone;
                PropertyItem[] properties = img.PropertyItems;
                foreach (PropertyItem p in properties)
                {
                    // 이미지가 똑바로 되어있지 않은 경우
                    if (p.Id == 274)
                    {
                        Int16 orientation = BitConverter.ToInt16(p.Value, 0);
                        switch (orientation)
                        {
                            case 1:
                                rft = RotateFlipType.RotateNoneFlipNone;
                                break;
                            case 3:
                                rft = RotateFlipType.Rotate180FlipNone;
                                break;
                            case 4:
                                rft = RotateFlipType.Rotate90FlipNone;
                                break;
                            case 8:
                                rft = RotateFlipType.Rotate270FlipNone;
                                break;
                        }
                    }
                }
                // 이미지가 부분은 이미지가 누워있을 경우 세워준다
                if (rft != RotateFlipType.RotateNoneFlipNone)
                {
                    img.RotateFlip(rft);
                }
                // 저장
                img.Save(wPath + "\\" + saveFileName);
 
                // 썸네일 작업
                // 썸네일 폭
                int thumW = 100;
                // 썸네일 높이
                int thumH = 100;
                // 썸네일 좌표 X
                int thumX = 0;
                // 썸네일 좌표 Y
                int thumY = 0;
                // 썸네일 이미지 그리기전 사이즈 지정
                Bitmap thumimg = new Bitmap(thumW, thumH);
                if (img.Width >= thumW && img.Height >= thumH)
                {
                    if (img.Width >= img.Height)
                    {
                        thumW = (thumH * img.Width) / img.Height;
                        thumX = (thumW - thumH) / 2;
                        thumY = 0;
                    }
                    else
                    {
                        thumH = (thumW * img.Height) / img.Width;
                        thumY = (thumH - thumW) / 2;
                        thumX = 0;
                    }
                }
                else if (img.Width >= img.Height && img.Height < thumH)
                {
                    thumW = img.Width;
                    thumH = img.Height;
                    thumX = (img.Width - thumW) / 2;
                    thumY = (img.Height - thumH) / 2 * -1;
                }
                else if (img.Width < img.Height && img.Height >= thumH)
                {
                    thumW = img.Width;
                    thumH = img.Height;
                    thumX = (img.Width - thumW) / 2 * -1;
                    thumY = (img.Height - thumH) / 2;
                }
                else
                {
                    thumW = img.Width;
                    thumH = img.Height;
                    thumX = (img.Width - thumW) / 2 * -1;
                    thumY = (img.Height - thumH) / 2 * -1;
                }
                Graphics gp = Graphics.FromImage(thumimg);
                gp.InterpolationMode = InterpolationMode.HighQualityBicubic;
                gp.DrawImage(img, new Rectangle(-thumX, -thumY, thumW, thumH));
                // 썸네일 저장
                thumimg.Save(wPath + "\\thum\\" + saveFileName);
            }
            else
            {
                // 이미지가 아닐경우
                // 저장하기
                SaveFile.SaveAs(wPath + "\\" + saveFileName);
            }
        }
        catch
        {
            return "";
        }
        return saveFileName;
    }
}
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