private async Task <ImageResult> ResizeAndUploadImage(IFormFile file, string folderName)
{
await Task.Delay(0);
if (!IsAllowedExtension(file))
{
return(ImageResult.Failed(new UploadError {
Description = "Only jpg, png, and bmp extensions are allowed."
}));
}
Bitmap originalBMP = new Bitmap(file.OpenReadStream());
double origWidth = originalBMP.Width;
double origHeight = originalBMP.Height;
double aspectRatio = origWidth / origHeight;
if (aspectRatio <= 0)
{
aspectRatio = 1;
}
float newHeight = 600;
float newWidth = (float)(newHeight * aspectRatio);
Bitmap newBMP = new Bitmap(originalBMP, (int)newWidth, (int)newHeight);
Graphics graphics = Graphics.FromImage(newBMP);
graphics.SmoothingMode = SmoothingMode.AntiAlias;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.DrawImage(originalBMP, 0, 0, newWidth, newHeight);
var uniqueFileName = Guid.NewGuid().ToString("N") + file.FileName;
var filePath = Path.Combine(_env.WebRootPath, folderName, uniqueFileName);
var folderPath = Path.Combine(_env.WebRootPath, folderName);
Directory.CreateDirectory(folderPath);
using (var fileStream = new FileStream(filePath, FileMode.Create))
{
newBMP.Save(fileStream, GetImageFormat(Path.GetExtension(file.FileName).Substring(1)));
}
originalBMP.Dispose();
newBMP.Dispose();
graphics.Dispose();
return(ImageResult.Successful(uniqueFileName));
}
/// <summary>
/// Deletes an image.
/// </summary>
/// <param name="oldFileName">Name of the image to be deleted.</param>
/// <param name="folderName">Name of the folder where image is in. Default value is 'images'.</param>
/// <returns></returns>
public async Task <ImageResult> DeleteImage(string oldFileName, string folderName = "images")
{
await Task.Delay(0);
if (string.IsNullOrEmpty(oldFileName))
{
return(ImageResult.Failed(new UploadError {
Description = "Could not find to file to be delet"
}));
}
string fullPath = Path.Combine(_env.WebRootPath, folderName, oldFileName);
if (File.Exists(fullPath))
{
File.Delete(fullPath);
}
return(ImageResult.Successful());
}
