Upload Image with Resize

Question

I am uploading image in folder using below method .In this I want to resize it before upload
have any idea with the same
Thanks In advance

public string FileUpload(OffViewModel vm)
{

            string filename = null;
            if (vm != null)
            {
            try
            {

                string uploaddir = Path.Combine(webHostEnvironment.WebRootPath, "images");
                // filename = Guid.NewGuid().ToString() + "-" + vm.ImagePath.FileName;
                string extension = Path.GetExtension(vm.ImagePath.FileName);
                filename =  id+ extension;
                string filePath = Path.Combine(uploaddir, filename);

                if (System.IO.File.Exists(filePath))
                {
                    System.IO.File.Delete(filePath);
                }

                using (var filestream = new FileStream(filePath, FileMode.Create))
                {

                    vm.ImagePath.CopyTo(filestream);
                }
            }
            catch (Exception ex)
            {

            }
           }
            return filename;
        }

Answer 1

HI @anil kumar

You can use the below method to resize the image.

private static System.Drawing.Image resizeImage(System.Drawing.Image imgToResize, Size size)    
{    
    //Get the image current width    
    int sourceWidth = imgToResize.Width;    
    //Get the image current height    
    int sourceHeight = imgToResize.Height;    
    float nPercent = 0;    
    float nPercentW = 0;    
    float nPercentH = 0;    
    //Calulate  width with new desired size    
    nPercentW = ((float)size.Width / (float)sourceWidth);    
    //Calculate height with new desired size    
    nPercentH = ((float)size.Height / (float)sourceHeight);    
    if (nPercentH < nPercentW)    
        nPercent = nPercentH;    
    else    
     nPercent = nPercentW;    
     //New Width    
     int destWidth = (int)(sourceWidth * nPercent);    
     //New Height    
     int destHeight = (int)(sourceHeight * nPercent);    
     Bitmap b = new Bitmap(destWidth, destHeight);    
     Graphics g = Graphics.FromImage((System.Drawing.Image)b);    
     g.InterpolationMode = InterpolationMode.HighQualityBicubic;    
     // Draw image with new width and height    
     g.DrawImage(imgToResize, 0, 0, destWidth, destHeight);    
     g.Dispose();    
     return (System.Drawing.Image)b;    
}  

To implement.

 System.Drawing.Image img = System.Drawing.Image.FromFile(filePath);  
    Bitmap b = new Bitmap(img);   
    System.Drawing.Image i = resizeImage(b, new Size(100, 100));  

Answer 2

HI @anil kumar

You can scale the image before uploading as shown below.

public static System.Drawing.Image ScaleImage(System.Drawing.Image image, int maxHeight)  
    {  
        var ratio = (double)maxHeight / image.Height;  
        var newWidth = (int)(image.Width * ratio);  
        var newHeight = (int)(image.Height * ratio);  
        var newImage = new Bitmap(newWidth, newHeight);  
        using (var g = Graphics.FromImage(newImage))  
        {  
            g.DrawImage(image, 0, 0, newWidth, newHeight);  
        }  
        return newImage;  
    }  

Using above function in your file method.

using (var filestream = new FileStream(filePath, FileMode.Create))  
                 {  
                     System.Drawing.Bitmap bmpPostedImage = new System.Drawing.Bitmap(filestream);  
                     System.Drawing.Image objImage = ScaleImage(bmpPostedImage, 81);//adjust size as per your requirement  
                          
                     vm.ImagePath.CopyTo(filestream);  
                 }  

Answer 3

Hi @Ayhan YILDIZ

Yes

I have just used few line of coding to resize image rest code is same as I have posted in my question.happy to share these line of code.

In this I have used nuget pacakage -->SixLabors.ImageSharp

using(var image= SixLabors.ImageSharp.Image.Load(vm.ImagePath.OpenReadStream()))
                    {
                        string newsize = ImageResize(image, 150, 150);
                        string[] sizearray = newsize.Split(',');
                        image.Mutate(m => m.Resize(Convert.ToInt32(sizearray[1]), Convert.ToInt32(sizearray[0])));
                        image.Save(filePath);
                    }


Happy Coding