|
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.IO; //*Directory copy Files
using Microsoft.AspNetCore.Http; //*IFormFile
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Hosting; //*get RootPath
using System.Drawing; //CoreCompat Image handling
using System.Drawing.Drawing2D; //CoreCompat Image handling
using System.Drawing.Imaging; //CoreCompat Image handling
using IWois_Core.Data; //ApplicationDbContext Database
connection
using
Microsoft.AspNetCore.Authorization; //Identity: Register,Login
using Microsoft.AspNetCore.Authentication; //Identity: Register,Login
using Microsoft.AspNetCore.Identity; //Identity: Register,Login
namespace IWois_Core.Controllers
{
public class ImageController : Controller
{
private readonly ApplicationDbContext _context;
private readonly IHostingEnvironment _appEnvironment;
public
ImageController(ApplicationDbContext context, IHostingEnvironment
appEnvironment)
{
//----< Init: Controller >----
_context = context;
_appEnvironment =
appEnvironment;
//----</ Init: Controller >----
}
[Authorize]
[HttpGet] //1.Load
public IActionResult
Upload_User_Profil_Image()
{
//--< Upload Form >--
return View();
//--</ Upload Form >--
}
[Authorize]
[HttpPost] //Postback
public async Task<IActionResult>
Upload_User_Profil_Image(IFormFile uploaded_File)
{
//--------< Upload_ImageFile()
>--------
string sResult = "";
//< check >
if (uploaded_File == null || uploaded_File.Length == 0)
{
ViewData["Error"] = "Error:file not selected";
return View(ViewData);
}
if (uploaded_File.ContentType.IndexOf("image",
StringComparison.OrdinalIgnoreCase) < 0)
{
ViewData["Error"] = "Error:This file is not an
image";
return View(ViewData);
}
//</ check >
//--< Get User ID >--
//internal referenz-Number for tracking
in tables
long IDUser = await
Common.ExtensionMethods.getIDUser_Number(this.User, _context);
//--</ Get User ID >--
//< init >
string sImage_Folder = "User_Images";
string sTarget_Filename = "User_Image_" + IDUser + ".jpg";
//</ init >
//< get Path >
string sPath_WebRoot = _appEnvironment.WebRootPath;
string sPath_of_Target_Folder = sPath_WebRoot
+ "\\User_Files\\" + sImage_Folder + "\\";
string sFile_Target_Original =
sPath_of_Target_Folder + "\\Original\\" + sTarget_Filename;
//string sImage_Filename_Original =
sPath_of_Target_Folder + uploaded_File.FileName;
//</ get Path >
//< Copy File to Target >
using (var stream = new FileStream(sFile_Target_Original,
FileMode.Create))
{
await uploaded_File.CopyToAsync(stream);
}
//</ Copy File to Target >
//< resize >
Image_resize(sFile_Target_Original, sPath_of_Target_Folder + "\\40\\" + sTarget_Filename, 40);
Image_resize(sFile_Target_Original,
sPath_of_Target_Folder + "\\80\\" + sTarget_Filename, 80);
Image_resize(sFile_Target_Original, sPath_of_Target_Folder + "\\120\\" + sTarget_Filename, 120);
Image_resize(sFile_Target_Original, sPath_of_Target_Folder + "\\240\\" + sTarget_Filename, 240);
Image_resize(sFile_Target_Original, sPath_of_Target_Folder + "\\400\\" + sTarget_Filename, 400);
//</ resize >
//string sResult= await
Safe_Uploaded_Image(ref uploaded_File, "User_Images");
//< output >
ViewData["FileUploaded"] = "/User_Files/User_Images/Original/" + sTarget_Filename;
ViewData["FileResized_40"] = "/User_Files/User_Images/40/" + sTarget_Filename;
ViewData["FileResized_80"] = "/User_Files/User_Images/80/" + sTarget_Filename;
ViewData["FileResized_120"] = "/User_Files/User_Images/120/" + sTarget_Filename;
ViewData["FileResized_240"] = "/User_Files/User_Images/240/" + sTarget_Filename;
ViewData["FileResized_400"] = "/User_Files/User_Images/400/" + sTarget_Filename;
return View();
//</ output >
//--------</ Upload_ImageFile()
>--------
}
private void Image_resize(string input_Image_Path, string output_Image_Path,int new_Width)
{
//---------------< Image_resize()
>---------------
//*Resizes an Image in Asp.Net MVC Core
2
//*Using Nuget CoreCompat.System.Drawing
//using System.IO
//using System.Drawing; //CoreCompat
//using System.Drawing.Drawing2D; //CoreCompat
//using System.Drawing.Imaging; //CoreCompat
const long quality = 50L;
Bitmap source_Bitmap = new Bitmap(input_Image_Path);
double dblWidth_origial = source_Bitmap.Width;
double dblHeigth_origial =
source_Bitmap.Height;
double relation_heigth_width =
dblHeigth_origial / dblWidth_origial;
int new_Height = (int)(new_Width
* relation_heigth_width);
//< create Empty Drawarea >
var new_DrawArea = new Bitmap(new_Width, new_Height);
//</ create Empty Drawarea >
using (var graphic_of_DrawArea = Graphics.FromImage(new_DrawArea))
{
//< setup >
graphic_of_DrawArea.CompositingQuality = CompositingQuality.HighSpeed;
graphic_of_DrawArea.InterpolationMode =
InterpolationMode.HighQualityBicubic;
graphic_of_DrawArea.CompositingMode = CompositingMode.SourceCopy;
//</ setup >
//< draw into placeholder >
//*imports the image into the drawarea
graphic_of_DrawArea.DrawImage(source_Bitmap,
0, 0, new_Width, new_Height);
//</ draw into placeholder >
//--< Output as .Jpg >--
using (var output =
System.IO.File.Open(output_Image_Path, FileMode.Create))
{
//< setup jpg >
var qualityParamId = Encoder.Quality;
var encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(qualityParamId, quality);
//</ setup jpg >
//< save Bitmap as Jpg >
var codec =
ImageCodecInfo.GetImageDecoders().FirstOrDefault(c => c.FormatID ==
ImageFormat.Jpeg.Guid);
new_DrawArea.Save(output,
codec, encoderParameters);
//resized_Bitmap.Dispose();
output.Close();
//</ save Bitmap as Jpg >
}
//--</ Output as .Jpg >--
graphic_of_DrawArea.Dispose();
}
source_Bitmap.Dispose();
//---------------</
Image_resize() >---------------
}
}
}
|